Merge branch 'issue-266'

better visibility, move need-help section near footer

.gitlab-ci.yml

@@ -1,6 +1,8 @@
 stages:
-  - hlint
+  - checks
+  - quick-test
   - test
+  - expensive-test
   - release
 
 variables:
@@ -49,6 +51,7 @@ variables:
     OS: "LINUX"
     ARCH: "ARM"
     CABAL_DIR: "$CI_PROJECT_DIR/cabal"
+  retry: 2
 
 .linux:aarch64:
   image: "registry.gitlab.haskell.org/ghc/ci-images/aarch64-linux-deb10:$DOCKER_REV"
@@ -75,9 +78,17 @@ variables:
     ARCH: "ARM64"
     CABAL_DIR: "$CI_PROJECT_DIR/cabal"
 
-.freebsd:
+.freebsd13:
   tags:
-    - x86_64-freebsd
+    - x86_64-freebsd13
+  variables:
+    OS: "FREEBSD"
+    ARCH: "64"
+    CABAL_DIR: "$CI_PROJECT_DIR/cabal"
+
+.freebsd12:
+  tags:
+    - x86_64-freebsd12
   variables:
     OS: "FREEBSD"
     ARCH: "64"
@@ -90,6 +101,7 @@ variables:
     OS: "WINDOWS"
     ARCH: "64"
     CABAL_DIR: "$CI_PROJECT_DIR/cabal"
+  retry: 2
 
 .root_cleanup:
   after_script:
@@ -99,7 +111,7 @@ variables:
   script:
     - bash ./.gitlab/script/ghcup_version.sh
   variables:
-    JSON_VERSION: "0.0.7"
+    JSON_VERSION: "0.0.6"
   artifacts:
     expire_in: 2 week
     paths:
@@ -173,10 +185,18 @@ variables:
     runInNixShell ./.gitlab/before_script/darwin/install_deps.sh 2>&1
     runInNixShell ./.gitlab/script/ghcup_version.sh 2>&1
 
-.test_ghcup_version:freebsd:
+.test_ghcup_version:freebsd12:
   extends:
     - .test_ghcup_version
-    - .freebsd
+    - .freebsd12
+    - .root_cleanup
+  before_script:
+    - ./.gitlab/before_script/freebsd/install_deps.sh
+
+.test_ghcup_version:freebsd13:
+  extends:
+    - .test_ghcup_version
+    - .freebsd13
     - .root_cleanup
   before_script:
     - ./.gitlab/before_script/freebsd/install_deps.sh
@@ -207,7 +227,7 @@ variables:
   only:
     - tags
   variables:
-    JSON_VERSION: "0.0.7"
+    JSON_VERSION: "0.0.6"
 
 ######## stack test ########
 
@@ -224,21 +244,21 @@ test:linux:stack:
 ######## bootstrap test ########
 
 test:linux:bootstrap_script:
-  stage: test
+  stage: quick-test
   before_script:
     - ./.gitlab/before_script/linux/install_deps_minimal.sh
   script:
     - ./.gitlab/script/ghcup_bootstrap.sh
   variables:
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   extends:
     - .debian
     - .root_cleanup
   needs: []
 
 test:windows:bootstrap_powershell_script:
-  stage: test
+  stage: quick-test
   script:
     - ./scripts/bootstrap/bootstrap-haskell.ps1 -InstallDir $CI_PROJECT_DIR -BootstrapUrl $CI_PROJECT_DIR/bootstrap-haskell -InBash
   after_script:
@@ -247,8 +267,8 @@ test:windows:bootstrap_powershell_script:
     - "[Environment]::SetEnvironmentVariable('CABAL_DIR', $null, [System.EnvironmentVariableTarget]::User)"
     - bash ./.gitlab/after_script.sh
   variables:
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   extends:
     - .windows
   needs: []
@@ -259,19 +279,36 @@ test:linux:
   stage: test
   extends: .test_ghcup_version:linux
   variables:
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   needs: []
 
-test:linux:cross-armv7:
-  stage: test
+test:linux:hls:
+  stage: expensive-test
   extends:
     - .test_ghcup_version
     - .debian
   variables:
-    GHC_VERSION: "8.10.5"
-    GHC_TARGET_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    HLS_TARGET_VERSION: "1.4.0"
+    CABAL_VERSION: "3.6.2.0"
+  needs: []
+  when: manual
+  allow_failure: true
+  before_script:
+    - ./.gitlab/before_script/linux/install_deps.sh
+  script:
+    - ./.gitlab/script/ghcup_hls.sh
+
+test:linux:cross-armv7:
+  stage: expensive-test
+  extends:
+    - .test_ghcup_version
+    - .debian
+  variables:
+    GHC_VERSION: "8.10.6"
+    GHC_TARGET_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
     CROSS: "arm-linux-gnueabihf"
   needs: []
   when: manual
@@ -282,15 +319,15 @@ test:linux:cross-armv7:
     - ./.gitlab/script/ghcup_cross.sh
 
 test:linux:git:hadrian:
-  stage: test
+  stage: expensive-test
   extends:
     - .test_ghcup_version
     - .debian
   variables:
-    GHC_VERSION: "8.10.6"
+    GHC_VERSION: "8.10.7"
     GHC_GIT_TAG: "ghc-9.0.1-release"
     GHC_GIT_VERSION: "9.0.1"
-    CABAL_VERSION: "3.4.0.0"
+    CABAL_VERSION: "3.6.2.0"
     CROSS: ""
   needs: []
   when: manual
@@ -307,8 +344,8 @@ test:linux:32bit:
   stage: test
   extends: .test_ghcup_version:linux32
   variables:
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   needs: []
 
 ######## arm tests ########
@@ -317,8 +354,8 @@ test:linux:armv7:
   stage: test
   extends: .test_ghcup_version:armv7
   variables:
-    GHC_VERSION: "8.10.4"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
     CROSS: ""
   when: manual
   needs: []
@@ -327,8 +364,8 @@ test:linux:aarch64:
   stage: test
   extends: .test_ghcup_version:aarch64
   variables:
-    GHC_VERSION: "8.10.4"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
     CROSS: ""
   when: manual
   needs: []
@@ -339,28 +376,38 @@ test:mac:
   stage: test
   extends: .test_ghcup_version:darwin
   variables:
-    GHC_VERSION: "8.10.4"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   needs: []
 
 test:mac:aarch64:
   stage: test
   extends: .test_ghcup_version:darwin:aarch64
   variables:
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   needs: []
   allow_failure: true
 
 
 ######## freebsd test ########
 
-test:freebsd:
+test:freebsd12:
   stage: test
-  extends: .test_ghcup_version:freebsd
+  extends: .test_ghcup_version:freebsd12
   variables:
-    GHC_VERSION: "8.10.4"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
+  allow_failure: true # freebsd runners are unreliable
+  when: manual
+  needs: []
+
+test:freebsd13:
+  stage: test
+  extends: .test_ghcup_version:freebsd13
+  variables:
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   allow_failure: true # freebsd runners are unreliable
   when: manual
   needs: []
@@ -371,8 +418,8 @@ test:windows:
   stage: test
   extends: .test_ghcup_version:windows
   variables:
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   needs: []
 
 # test:windows:scoop:
@@ -392,8 +439,8 @@ release:linux:64bit:
     - ./.gitlab/before_script/linux/alpine/install_deps.sh
   variables:
     ARTIFACT: "x86_64-linux-ghcup"
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
 
 
 release:linux:32bit:
@@ -406,8 +453,8 @@ release:linux:32bit:
     - ./.gitlab/before_script/linux/alpine/install_deps.sh
   variables:
     ARTIFACT: "i386-linux-ghcup"
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
 
 release:linux:armv7:
   stage: release
@@ -419,8 +466,8 @@ release:linux:armv7:
     - ./.gitlab/before_script/linux/install_deps.sh
   variables:
     ARTIFACT: "armv7-linux-ghcup"
-    GHC_VERSION: "8.10.4"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
     CROSS: ""
 
 release:linux:aarch64:
@@ -433,8 +480,8 @@ release:linux:aarch64:
     - ./.gitlab/before_script/linux/install_deps.sh
   variables:
     ARTIFACT: "aarch64-linux-ghcup"
-    GHC_VERSION: "8.10.4"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
     CROSS: ""
 
 ######## darwin release ########
@@ -450,8 +497,8 @@ release:darwin:
     - ./.gitlab/before_script/darwin/install_deps.sh
   variables:
     ARTIFACT: "x86_64-apple-darwin-ghcup"
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
     MACOSX_DEPLOYMENT_TARGET: "10.7"
 
 release:darwin:aarch64:
@@ -483,27 +530,42 @@ release:darwin:aarch64:
     runInNixShell ./.gitlab/script/ghcup_release.sh 2>&1
   variables:
     ARTIFACT: "aarch64-apple-darwin-ghcup"
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
     MACOSX_DEPLOYMENT_TARGET: "10.7"
   allow_failure: true
 
 
 ######## freebsd release ########
 
-release:freebsd:
+release:freebsd12:
   stage: release
-  needs: ["test:freebsd"]
+  needs: ["test:freebsd12"]
   extends:
-    - .freebsd
+    - .freebsd12
     - .release_ghcup
     - .root_cleanup
   before_script:
     - ./.gitlab/before_script/freebsd/install_deps.sh
   variables:
     ARTIFACT: "x86_64-portbld-freebsd-ghcup"
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
+  allow_failure: true
+
+release:freebsd13:
+  stage: release
+  needs: ["test:freebsd13"]
+  extends:
+    - .freebsd13
+    - .release_ghcup
+    - .root_cleanup
+  before_script:
+    - ./.gitlab/before_script/freebsd/install_deps.sh
+  variables:
+    ARTIFACT: "x86_64-portbld-freebsd-ghcup"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
   allow_failure: true
 
 ######## windows release ########
@@ -519,13 +581,13 @@ release:windows:
     - bash ./.gitlab/before_script/windows/install_deps.sh
   variables:
     ARTIFACT: "x86_64-mingw64-ghcup"
-    GHC_VERSION: "8.10.6"
-    CABAL_VERSION: "3.4.0.0"
+    GHC_VERSION: "8.10.7"
+    CABAL_VERSION: "3.6.2.0"
 
 ######## hlint ########
 
 hlint:
-  stage: hlint
+  stage: checks
   extends:
     - .debian
   script:
@@ -536,3 +598,29 @@ hlint:
     paths:
       - report.html
     when: on_failure
+
+######## mkdocs ########
+
+mkdocs:
+  stage: checks
+  extends:
+    - .debian
+  before_script:
+    - sudo apt-get update -y
+    - sudo apt-get install -y python3-pip
+    - pip3 install mkdocs
+  script:
+    - ~/.local/bin/mkdocs build
+  allow_failure: true
+
+######## shellcheck ########
+
+shellcheck:
+  image: "koalaman/shellcheck-alpine"
+  tags:
+    - x86_64-linux
+  stage: checks
+  script:
+    - shellcheck scripts/bootstrap/bootstrap-haskell
+  allow_failure: true
+

.gitlab/before_script/freebsd/install_deps.sh

@@ -11,9 +11,9 @@ mkdir -p "${TMPDIR}"
 curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-portbld-freebsd-ghcup > ./ghcup-bin
 chmod +x ghcup-bin
 
-./ghcup-bin upgrade -i -f
-./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin set ${GHC_VERSION}
-./ghcup-bin install-cabal ${CABAL_VERSION}
+./ghcup-bin -v upgrade -i -f
+./ghcup-bin -v install ${GHC_VERSION}
+./ghcup-bin -v set ${GHC_VERSION}
+./ghcup-bin -v install-cabal ${CABAL_VERSION}
 
 exit 0

.gitlab/before_script/linux/install_deps.sh

@@ -7,67 +7,21 @@ set -eux
 mkdir -p "${TMPDIR}"
 
 sudo apt-get update -y
-sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev libbz2-dev git wget lsb-release software-properties-common gnupg2 apt-transport-https
+sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev libbz2-dev git wget lsb-release software-properties-common gnupg2 apt-transport-https gcc autoconf automake build-essential
 
 if [ "${CROSS}" = "arm-linux-gnueabihf" ] ; then
-	sudo apt-get install -y autoconf build-essential gcc-arm-linux-gnueabihf
+	sudo apt-get install -y gcc-arm-linux-gnueabihf
 	sudo dpkg --add-architecture armhf
 	sudo apt-get update -y
 	sudo apt-get install -y libncurses-dev:armhf
 fi
 
-case "${ARCH}" in
-	ARM*)
-		case "${ARCH}" in
-			"ARM")
-				ghc_url=https://downloads.haskell.org/~ghc/${GHC_VERSION}/ghc-${GHC_VERSION}-armv7-deb10-linux.tar.xz
-				cabal_url=home.smart-cactus.org/~ben/cabal-install-${CABAL_VERSION}-armv7-linux-bootstrapped.tar.xz
-				;;
-			"ARM64")
-				ghc_url=https://downloads.haskell.org/~ghc/${GHC_VERSION}/ghc-${GHC_VERSION}-aarch64-deb10-linux.tar.xz
-				cabal_url=https://downloads.haskell.org/~cabal/cabal-install-${CABAL_VERSION}/cabal-install-${CABAL_VERSION}-aarch64-ubuntu-18.04.tar.xz
-				;;
-			*)
-				exit 1 ;;
-		esac
+export BOOTSTRAP_HASKELL_NONINTERACTIVE=1
+export BOOTSTRAP_HASKELL_GHC_VERSION=$GHC_VERSION
+export BOOTSTRAP_HASKELL_CABAL_VERSION=$CABAL_VERSION
+export BOOTSTRAP_HASKELL_VERBOSE=1
 
-		mkdir -p "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin
+curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh
 
-		curl -O "${ghc_url}"
-		tar -xf ghc-*.tar.*
-		cd ghc-${GHC_VERSION}
-		./configure --prefix="${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/ghc/${GHC_VERSION}
-		make install
-		for i in "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/ghc/${GHC_VERSION}/bin/*-${GHC_VERSION} ; do
-			ln -s "${i}" "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/${i##*/}
-		done
-		for x in "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/*-${GHC_VERSION} ; do
-			ln -s ${x##*/} ${x%-${GHC_VERSION}}
-		done
-		cd ..
-		rm -rf ghc-${GHC_VERSION} ghc-*.tar.*
-		unset x i
-
-		mkdir cabal-install
-		cd cabal-install
-		curl -O "${cabal_url}"
-		tar -xf cabal-install-*
-		mv cabal "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/cabal
-		cd ..
-		rm -rf cabal-install
-
-		;;
-	*) 
-		url=https://downloads.haskell.org/~ghcup/x86_64-linux-ghcup
-
-		curl -sSfL "${url}" > ./ghcup-bin
-		chmod +x ghcup-bin
-
-		./ghcup-bin upgrade -i -f
-		./ghcup-bin install ghc ${GHC_VERSION}
-		./ghcup-bin set ghc ${GHC_VERSION}
-		./ghcup-bin install cabal ${CABAL_VERSION}
-
-		;;
-esac
+rm "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/ghcup
 

.gitlab/ghcup_env

@@ -1,9 +1,11 @@
 if [ "${OS}" = "WINDOWS" ] ; then
 	export GHCUP_INSTALL_BASE_PREFIX="$CI_PROJECT_DIR"
-	export PATH="$GHCUP_INSTALL_BASE_PREFIX/ghcup/bin:$CI_PROJECT_DIR/.local/bin:$PATH"
+	export GHCUP_BIN="$CI_PROJECT_DIR/ghcup/bin"
+	export PATH="$GHCUP_BIN:$CI_PROJECT_DIR/.local/bin:$PATH"
 	export TMPDIR="$CI_PROJECT_DIR/tmp"
 else
 	export GHCUP_INSTALL_BASE_PREFIX="$CI_PROJECT_DIR"
-	export PATH="$CI_PROJECT_DIR/.ghcup/bin:$CI_PROJECT_DIR/.local/bin:/opt/llvm/bin:$PATH"
+	export GHCUP_BIN="$CI_PROJECT_DIR/.ghcup/bin"
+	export PATH="$GHCUP_BIN:$CI_PROJECT_DIR/.local/bin:/opt/llvm/bin:$PATH"
 	export TMPDIR="$CI_PROJECT_DIR/tmp"
 fi

.gitlab/script/ghcup_hls.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+
+set -eux
+
+. "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup_env"
+
+mkdir -p "$CI_PROJECT_DIR"/.local/bin
+
+CI_PROJECT_DIR=$(pwd)
+
+ecabal() {
+	cabal "$@"
+}
+
+eghcup() {
+	ghcup -v -c -s file://$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml "$@"
+}
+
+git describe --always
+
+### build
+
+ecabal update
+
+ecabal build -w ghc-${GHC_VERSION}
+cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --verbose=0 --offline sh -- -c 'command -v ghcup')" "$CI_PROJECT_DIR"/.local/bin/ghcup
+
+### cleanup
+
+rm -rf "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup
+
+### manual cli based testing
+
+eghcup --numeric-version
+
+eghcup install ghc ${GHC_VERSION}
+eghcup set ghc ${GHC_VERSION}
+eghcup install cabal ${CABAL_VERSION}
+
+cabal --version
+
+eghcup debug-info
+
+eghcup compile hls -j $(nproc) -v ${HLS_TARGET_VERSION} ${GHC_VERSION}
+
+[ `$(eghcup whereis hls ${HLS_TARGET_VERSION}) --numeric-version` = "${HLS_TARGET_VERSION}" ] || [ `$(eghcup whereis hls ${HLS_TARGET_VERSION}) --numeric-version | sed 's/.0$//'` = "${HLS_TARGET_VERSION}" ]
+
+# nuke
+eghcup nuke
+[ ! -e "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup" ]
+

.gitlab/script/ghcup_version.sh

@@ -101,6 +101,10 @@ eghcup install ghc ${GHC_VERSION}
 eghcup set ghc ${GHC_VERSION}
 eghcup install cabal ${CABAL_VERSION}
 [ `$(eghcup whereis cabal ${CABAL_VERSION}) --numeric-version` = "${CABAL_VERSION}" ]
+eghcup unset cabal
+"$GHCUP_BIN"/cabal --version && exit || echo yes
+eghcup set cabal ${CABAL_VERSION}
+[ `$(eghcup whereis cabal ${CABAL_VERSION}) --numeric-version` = "${CABAL_VERSION}" ]
 
 cabal --version
 
@@ -151,9 +155,13 @@ else
 	[ "$(ghc --numeric-version)" = "8.10.3" ]
 	eghcup set ${GHC_VERSION}
 	[ "$(ghc --numeric-version)" = "${ghc_ver}" ]
+	eghcup unset ghc
+    "$GHCUP_BIN"/ghc --numeric-version && exit || echo yes
+	eghcup set ${GHC_VERSION}
 	eghcup --offline rm 8.10.3
 	[ "$(ghc --numeric-version)" = "${ghc_ver}" ]
 
+
 	if [ "${OS}" = "DARWIN" ] ; then
 		eghcup install hls
 		$(eghcup whereis hls) --version
@@ -164,9 +172,13 @@ else
 		if [ "${ARCH}" = "64" ] ; then
 			eghcup install hls
 			haskell-language-server-wrapper --version
+			eghcup unset hls
+			"$GHCUP_BIN"/haskell-language-server-wrapper --version && exit || echo yes
 
 			eghcup install stack
 			stack --version
+			eghcup unset hls
+			"$GHCUP_BIN"/stack --version && exit || echo yes
 		fi
 	fi
 fi

CHANGELOG.md

@@ -1,5 +1,35 @@
 # Revision history for ghcup
 
+## 0.1.17.2 -- 2021-09-30
+
+* Honour GHC bootstrap compiler during git clone stages wrt [#250](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/250)
+* Speed up `unset` command
+* Fix `--overwrite-version` for `ghcup compile ghc` wrt [#253](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/253)
+* Apply patches before bootstrap
+
+## 0.1.17.1 -- 2021-09-26
+
+* Fix `NO_COLOR`
+* Fix `ghcup list -t` for hls/stack, wrt [#244](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/244)
+* Get rid of concurrent-output
+* Improve cli interface with partial versions (e.g. `ghcup install ghc 8`)
+* Fix HLS compilation builds
+* Implement `ghcup gc` (garbage collection) command
+
+## 0.1.17 -- 2021-09-20
+
+* Add `--force` option to install/compile wrt [#210](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/210) by Arjun Kathuria
+* Implement compiling HLS from source wrt [#201](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/201)
+* Implement experimental GPG verification of the metadata file (see README) wrt [#263](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/236)
+* Add `ghcup unset` command wrt [#145](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/145)
+* Add `ghcup whereis bindir` etc wrt [#221](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/221)
+* Greatly reduce dependency footprint wrt [#212](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/212)
+* Add `ghcup --plan-json`
+* Improve `--patchdir` option for GHC compilation wrt [#226](https://gitlab.haskell.org/haskell/ghcup-hs/-/merge_requests/226)
+* Try to improve logging and failure modes, especially during downloads
+* Add descriptive warnings when HLS and GHC versions are incompatible
+* Improve curl header parsing wrt [#213](https://gitlab.haskell.org/haskell/ghcup-hs/-/merge_requests/213)
+
 ## 0.1.16.2 -- 2021-08-12
 
 * Add isolated installations wrt [#141](https://gitlab.haskell.org/haskell/ghcup-hs/-/merge_requests/141) by Arjun Kathuria

README.md

@@ -1,518 +1,11 @@
-`ghcup` makes it easy to install specific versions of `ghc` on GNU/Linux,
-macOS (aka Darwin), FreeBSD and Windows and can also bootstrap a fresh Haskell developer environment from scratch.
-It follows the unix UNIX philosophy of [do one thing and do it well](https://en.wikipedia.org/wiki/Unix_philosophy#Do_One_Thing_and_Do_It_Well).
-
-Similar in scope to [rustup](https://github.com/rust-lang-nursery/rustup.rs), [pyenv](https://github.com/pyenv/pyenv) and [jenv](http://www.jenv.be).
-
-## Table of Contents
+## The GHCup Haskell installer
 
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+<a href="https://opencollective.com/ghcup#category-CONTRIBUTE"><img src="https://opencollective.com/webpack/donate/button@2x.png?color=blue" alt="Donate" width="150"></a>
 
-   * [Installation](#installation)
-     * [Simple bootstrap](#simple-bootstrap)
-     * [Manual install](#manual-install)
-     * [Vim integration](#vim-integration)
-   * [Usage](#usage)
-     * [Configuration](#configuration)
-     * [Manpages](#manpages)
-     * [Shell-completion](#shell-completion)
-     * [Compiling GHC from source](#compiling-ghc-from-source)
-     * [XDG support](#xdg-support)
-     * [Env variables](#env-variables)
-     * [Installing custom bindists](#installing-custom-bindists)
-     * [Isolated Installs](#isolated-installs)
-     * [CI](#ci)
-     * [Tips and tricks](#tips-and-tricks)
-   * [Design goals](#design-goals)
-   * [How](#how)
-   * [Known users](#known-users)
-   * [Known problems](#known-problems)
-   * [FAQ](#faq)
+GHCup is an installer for the general purpose language [Haskell](https://www.haskell.org/).
 
-## Installation
-
-### Simple bootstrap
-
-Follow the instructions at [https://www.haskell.org/ghcup/](https://www.haskell.org/ghcup/)
-
-### Manual install
-
-Download the binary for your platform at [https://downloads.haskell.org/~ghcup/](https://downloads.haskell.org/~ghcup/)
-and place it into your `PATH` anywhere.
-
-Then adjust your `PATH` in `~/.bashrc` (or similar, depending on your shell) like so:
-
-```sh
-export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$PATH"
-```
-
-### Vim integration
-
-See [ghcup.vim](https://github.com/hasufell/ghcup.vim).
-
-## Usage
-
-See `ghcup --help`.
-
-For the simple interactive TUI, run:
-
-```sh
-ghcup tui
-```
-
-For the full functionality via cli:
-
-```sh
-# list available ghc/cabal versions
-ghcup list
-
-# install the recommended GHC version
-ghcup install ghc
-
-# install a specific GHC version
-ghcup install ghc 8.2.2
-
-# set the currently "active" GHC version
-ghcup set ghc 8.4.4
-
-# install cabal-install
-ghcup install cabal
-
-# update ghcup itself
-ghcup upgrade
-```
-
-GHCup works very well with [`cabal-install`](https://hackage.haskell.org/package/cabal-install), which
-handles your haskell packages and can demand that [a specific version](https://cabal.readthedocs.io/en/latest/nix-local-build.html#cfg-flag---with-compiler)  of `ghc` is available, which `ghcup` can do.
-
-### Configuration
-
-A configuration file can be put in `~/.ghcup/config.yaml`. The default config file
-explaining all possible configurations can be found in this repo: [config.yaml](./data/config.yaml).
-
-Partial configuration is fine. Command line options always override the config file settings.
-
-### Manpages
-
-For man pages to work you need [man-db](http://man-db.nongnu.org/) as your `man` provider, then issue `man ghc`. Manpages only work for the currently set ghc.
-`MANPATH` may be required to be unset.
-
-### Shell-completion
-
-Shell completions are in [scripts/shell-completions](./scripts/shell-completions) directory of this repository.
-
-For bash: install `shell-completions/bash`
-as e.g. `/etc/bash_completion.d/ghcup` (depending on distro)
-and make sure your bashrc sources the startup script
-(`/usr/share/bash-completion/bash_completion` on some distros).
-
-### Compiling GHC from source
-
-Compiling from source is supported for both source tarballs and arbitrary git refs. See `ghcup compile ghc --help`
-for a list of all available options.
-
-If you need to overwrite the existing `build.mk`, check the default files
-in [data/build_mk](./data/build_mk), copy them somewhere, adjust them and
-pass `--config path/to/build.mk` to `ghcup compile ghc`.
-Common `build.mk` options are explained [here](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/using#build-configuration).
-
-Make sure your system meets all the [prerequisites](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation).
-
-#### Cross support
-
-ghcup can compile and install a cross GHC for any target. However, this
-requires that the build host has a complete cross toolchain and various
-libraries installed for the target platform.
-
-Consult the GHC documentation on the [prerequisites](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/cross-compiling#tools-to-install).
-For distributions with non-standard locations of cross toolchain and
-libraries, this may need some tweaking of `build.mk` or configure args.
-See `ghcup compile ghc --help` for further information.
-
-### XDG support
-
-To enable XDG style directories, set the environment variable `GHCUP_USE_XDG_DIRS` to anything.
-
-Then you can control the locations via XDG environment variables as such:
-
-* `XDG_DATA_HOME`: GHCs will be unpacked in `ghcup/ghc` subdir (default: `~/.local/share`)
-* `XDG_CACHE_HOME`: logs and download files will be stored in `ghcup` subdir (default: `~/.cache`)
-* `XDG_BIN_HOME`: binaries end up here (default: `~/.local/bin`)
-* `XDG_CONFIG_HOME`: the config file is stored in `ghcup` subdir as `config.yaml` (default: `~/.config`)
-
-**Note that `ghcup` makes some assumptions about structure of files in `XDG_BIN_HOME`. So if you have other tools
-installing e.g. stack/cabal/ghc into it, this will likely clash. In that case consider disabling XDG support.**
-
-### Env variables
-
-This is the complete list of env variables that change GHCup behavior:
-
-* `GHCUP_USE_XDG_DIRS`: see [XDG support](#xdg-support) above
-* `TMPDIR`: where ghcup does the work (unpacking, building, ...)
-* `GHCUP_INSTALL_BASE_PREFIX`: the base of ghcup (default: `$HOME`)
-* `GHCUP_CURL_OPTS`: additional options that can be passed to curl
-* `GHCUP_WGET_OPTS`: additional options that can be passed to wget
-* `GHCUP_SKIP_UPDATE_CHECK`: Skip the (possibly annoying) update check when you run a command
-* `CC`/`LD` etc.: full environment is passed to the build system when compiling GHC via GHCup
-
-### Installing custom bindists
-
-There are a couple of good use cases to install custom bindists:
-
-1. manually built bindists (e.g. with patches)
-  - example: `ghcup install ghc -u 'file:///home/mearwald/tmp/ghc-eff-patches/ghc-8.10.2-x86_64-deb10-linux.tar.xz' 8.10.2-eff`
-2. GHC head CI bindists
-  - example: `ghcup install ghc -u 'https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27' head`
-3. DWARF bindists
-  - example: `ghcup install ghc -u 'https://downloads.haskell.org/~ghc/8.10.2/ghc-8.10.2-x86_64-deb10-linux-dwarf.tar.xz' 8.10.2-dwarf`
-
-Since the version parser is pretty lax, `8.10.2-eff` and `head` are both valid versions
-and produce the binaries `ghc-8.10.2-eff` and `ghc-head` respectively.
-GHCup always needs to know which version the bindist corresponds to (this is not automatically
-detected).
-
-### Isolated installs
-
-Ghcup also enables you to install a tool (GHC, Cabal, HLS, Stack) at an isolated location of your choosing.
-These installs, as the name suggests, are separate from your main installs and DO NOT conflict with them.
-
-
-- No symlinks are made to these isolated installed tools, you'd have to manually point to them wherever you intend to use them.
-
-- These installs, can also NOT be deleted from ghcup, you'd have to go and manually delete these.
-
-You need to use the `--isolate` or `-i` flag followed by the directory path.
-
-Examples:-
-
-1. install an isolated GHC version at location /home/user/isolated_dir/ghc/  
-   - `ghcup install ghc 8.10.5 --isolate /home/user/isolated_dir/ghc`
-
-2. isolated install Cabal at a location you desire  
-   - `ghcup install cabal --isolate /home/username/my_isolated_dir/`
-
-3. do an isolated install with a custom bindist  
-   - `ghcup install ghc --isolate /home/username/my_isolated_dir/ -u 'https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27' head`
-
-4. isolated install HLS  
-   - `ghcup install hls --isolate /home/username/dir/hls/`
-
-5. you can even compile ghc to an isolated location.  
-   - `ghcup compile ghc -j 4 -v 9.0.1 -b 8.10.5 -i /home/username/my/dir/ghc` 
-   ---  
-
-### CI
-
-On windows, ghcup can be installed automatically on a CI runner like so:
-
-```ps
-Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $false,$true,$true,$false,$false,$false,$false,"C:\"
-```
-
-On linux/darwin/freebsd, run the following on your runner:
-
-```sh
-curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 sh
-```
-
-This will just install `ghcup` and on windows additionally `msys2`.
-
-#### Example github workflow
-
-On github workflows you can use https://github.com/haskell/actions/
-
-If you want to install ghcup manually though, here's an example config:
-
-```yml
-name: Haskell CI
-
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    branches: [ master ]
-
-jobs:
-  build-cabal:
-
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, macOS-latest, windows-latest]
-        ghc: ['8.10.7', '9.0.1']
-        cabal: ['3.4.0.0']
-
-    steps:
-    - uses: actions/checkout@v2
-
-    - if: matrix.os == 'windows-latest'
-      name: Install ghcup on windows
-      run: Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $false,$true,$true,$false,$false,$false,$false,"C:\"
-
-    - if: matrix.os == 'windows-latest'
-      name: Add ghcup to PATH
-      run: echo "/c/ghcup/bin" >> $GITHUB_PATH
-      shell: bash
-
-    - if: matrix.os != 'windows-latest'
-      name: Install ghcup on non-windows
-      run: curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 sh
-
-    - name: Install ghc/cabal
-      run: |
-        ghcup install ghc ${{ matrix.ghc }}
-        ghcup install cabal ${{ matrix.cabal }}
-      shell: bash
-
-    - name: Update cabal index
-      run: cabal update
-      shell: bash
-
-    - name: Build
-      run: cabal build --enable-tests --enable-benchmarks
-      shell: bash
-
-    - name: Run tests
-      run: cabal test
-      shell: bash
-```
-   
-### Tips and tricks
-
-#### with_ghc wrapper (e.g. for HLS)
-
-Due to some HLS [bugs](https://github.com/mpickering/hie-bios/issues/194) it's necessary that the `ghc` in PATH
-is the one defined in `cabal.project`. With some simple shell functions, we can start our editor with the appropriate
-path prepended.
-
-For bash, in e.g. `~/.bashrc` define:
-
-```sh
-with_ghc() {
-  local np=$(ghcup --offline whereis -d ghc $1 || { ghcup --cache install ghc $1 && ghcup whereis -d ghc $1 ;})
-  if [ -e "${np}" ] ; then
-    shift
-    PATH="$np:$PATH" "$@"
-  else
-    >&2 echo "Cannot find or install GHC version $1"
-    return 1
-  fi
-}
-```
-
-For fish shell, in e.g. `~/.config/fish/config.fish` define:
-
-```fish
-function with_ghc
-  set --local np (ghcup --offline whereis -d ghc $argv[1] ; or begin ghcup --cache install ghc $argv[1] ; and ghcup whereis -d ghc $argv[1] ; end)
-  if test -e "$np"
-    PATH="$np:$PATH" $argv[2..-1]
-  else
-    echo "Cannot find or install GHC version $argv[1]" 1>&2
-    return 1
-  end
-end
-```
-
-Then start a new shell and issue:
-
-```sh
-# replace 'code' with your editor
-with_ghc 8.10.5 code path/to/haskell/source
-```
-
-Cabal and HLS will now see `8.10.5` as the primary GHC, without the need to
-run `ghcup set` all the time when switching between projects.
-
-## Design goals
-
-1. simplicity
-2. non-interactive
-3. portable (eh)
-4. do one thing and do it well (UNIX philosophy)
-
-### Non-goals
-
-1. invoking `sudo`, `apt-get` or *any* package manager
-2. handling system packages
-3. handling cabal projects
-4. being a stack alternative
-
-## How
-
-Installs a specified GHC version into `~/.ghcup/ghc/<ver>`, and places `ghc-<ver>` symlinks in `~/.ghcup/bin/`.
-
-Optionally, an unversioned `ghc` link can point to a default version of your choice.
-
-This uses precompiled GHC binaries that have been compiled on fedora/debian by [upstream GHC](https://www.haskell.org/ghc/download_ghc_8_6_1.html#binaries).
-
-Alternatively, you can also tell it to compile from source (note that this might fail due to missing requirements).
-
-In addition this script can also install `cabal-install`.
-
-## Known users
-
-* Github actions:
-	- [actions/virtual-environments](https://github.com/actions/virtual-environments)
-	- [haskell/actions/setup](https://github.com/haskell/actions/tree/main/setup)
-* mirrors:
-	- [sjtug](https://mirror.sjtu.edu.cn/docs/ghcup)
-* tools:
-	- [vabal](https://github.com/Franciman/vabal)
-
-## Known problems
-
-### Custom ghc version names
-
-When installing ghc bindists with custom version names as outlined in
-[installing custom bindists](#installing-custom-bindists), then cabal might
-be unable to find the correct `ghc-pkg` (also see [#73](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/73))
-if you use `cabal build --with-compiler=ghc-foo`. Instead, point it to the full path, such as:
-`cabal build --with-compiler=$HOME/.ghcup/ghc/<version-name>/bin/ghc` or set that GHC version
-as the current one via: `ghcup set ghc <version-name>`.
-
-This problem doesn't exist for regularly installed GHC versions.
-
-### Limited distributions supported
-
-Currently only GNU/Linux distributions compatible with the [upstream GHC](https://www.haskell.org/ghc/download_ghc_8_6_1.html#binaries) binaries are supported.
-
-### Precompiled binaries
-
-Since this uses precompiled binaries you may run into
-several problems.
-
-#### Missing libtinfo (ncurses)
-
-You may run into problems with *ncurses* and **missing libtinfo**, in case
-your distribution doesn't use the legacy way of building
-ncurses and has no compatibility symlinks in place.
-
-Ask your distributor on how to solve this or
-try to compile from source via `ghcup compile <version>`.
-
-#### Libnuma required
-
-This was a [bug](https://ghc.haskell.org/trac/ghc/ticket/15688) in the build system of some GHC versions that lead to
-unconditionally enabled libnuma support. To mitigate this you might have to install the libnuma
-package of your distribution. See [here](https://gitlab.haskell.org/haskell/ghcup/issues/58) for a discussion.
-
-### Compilation
-
-Although this script can compile GHC for you, it's just a very thin
-wrapper around the build system. It makes no effort in trying
-to figure out whether you have the correct toolchain and
-the correct dependencies. Refer to [the official docs](https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Linux)
-on how to prepare your environment for building GHC.
-
-### Stack support
-
-There may be a number of bugs when trying to make ghcup installed GHC versions work with stack,
-such as:
-
-- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/188
-
-Further, stack's upgrade procedure may break/confuse ghcup. There are a number of integration
-issues discussed here:
-
-- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/153
-
-### Windows support
-
-Windows support is in early stages. Since windows doesn't support symbolic links properly,
-ghcup uses a [shimgen wrapper](https://github.com/71/scoop-better-shimexe). It seems to work
-well, but there may be unknown issues with that approach.
-
-Windows 7 and Powershell 2.0 aren't well supported at the moment, also see:
-
-- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/140
-- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/197
-
-## FAQ
-
-### Why reimplement stack?
-
-GHCup is not a reimplementation of stack. The only common part is automatic installation of GHC,
-but even that differs in scope and design.
-
-### Why should I use ghcup over stack?
-
-GHCup is not a replacement for stack. Instead, it supports installing and managing stack versions.
-It does the same for cabal, GHC and HLS. As such, It doesn't make a workflow choice for you.
-
-### Why should I let ghcup manage stack?
-
-You don't need to. However, some users seem to prefer to have a central tool that manages cabal and stack
-at the same time. Additionally, it can allow better sharing of GHC installation across these tools.
-Also see:
-
-* https://docs.haskellstack.org/en/stable/yaml_configuration/#system-ghc
-* https://github.com/commercialhaskell/stack/pull/5585
-
-### Why does ghcup not use stack code?
-
-Oddly, this question has been asked a couple of times. For the curious, here are a few reasons:
-
-1. GHCup started as a shell script. At the time of rewriting it in Haskell, the authors didn't even know that stack exposes *some* of its [installation API](https://hackage.haskell.org/package/stack-2.5.1.1/docs/Stack-Setup.html)
-2. Even if they did, it doesn't seem it would have satisfied their needs
-	  - it didn't support cabal installation, which was the main motivation behind GHCup back then
-	  - depending on a codebase as big as stack for a central part of one's application without having a short contribution pipeline would likely have caused stagnation or resulted in simply copy-pasting the relevant code in order to adjust it
-	  - it's not clear how GHCup would have been implemented with the provided API. It seems the codebases are fairly different. GHCup does a lot of symlink handling to expose a central `bin/` directory that users can easily put in PATH, without having to worry about anything more. It also provides explicit removal functionality, GHC cross-compilation, a TUI, etc etc.
-3. GHCup is built around unix principles and supposed to be simple.
-
-### Why not unify...
-
-#### ...stack and Cabal and do away with standalone installers
-
-GHCup is not involved in such decisions. cabal-install and stack might have a
-sufficiently different user experience to warrant having a choice.
-
-#### ...installer implementations and have a common library
-
-This sounds like an interesting goal. However, GHC installation isn't a hard engineering problem
-and the shared code wouldn't be too exciting. For such an effort to make sense, all involved
-parties would need to collaborate and have a short pipeline to get patches in.
-
-It's true this would solve the integration problem, but following unix principles, we can
-do similar via **hooks**. Both cabal and stack can support installation hooks. These hooks
-can then call into ghcup or anything else, also see:
-
-* https://github.com/haskell/cabal/issues/7394
-* https://github.com/commercialhaskell/stack/pull/5585
-
-#### ...installers (like, all of it)
-
-So far, there hasn't been an **open** discussion about this. Is this even a good idea?
-Sometimes projects converge eventually if their overlap is big enough, sometimes they don't.
-
-While unification sounds like a simplification of the ecosystem, it also takes away choice.
-Take `curl` and `wget` as an example.
-
-How bad do we need this?
-
-### Why not support windows?
-
-Windows is supported since GHCup version 0.1.15.1.
-
-### Why the haskell reimplementation?
-
-GHCup started as a portable posix shell script of maybe 50 LOC. GHC installation itself can be carried out in
-about ~3 lines of shell code (download, unpack , configure+make install). However, much convenient functionality
-has been added since, as well as ensuring that all operations are safe and correct. The shell script ended up with
-over 2k LOC, which was very hard to maintain.
-
-The main concern when switching from a portable shell script to haskell was platform/architecture support.
-However, ghcup now re-uses GHCs CI infrastructure and as such is perfectly in sync with all platforms that
-GHC supports.
-
-### Is GHCup affiliated with the Haskell Foundation?
-
-There has been some collaboration: Windows and Stack support were mainly requested by the Haskell Foundation
-and those seemed interesting features to add.
-
-Other than that, GHCup is dedicated only to its users and is supported by haskell.org through hosting and CI
-infrastructure.
+Visit the [documentation](https://www.haskell.org/ghcup/) for installation instructions.

app/ghcup-gen/Main.hs

@@ -11,21 +11,23 @@
 module Main where
 
 import           GHCup.Types
-import           GHCup.Types.Optics
 import           GHCup.Errors
 import           GHCup.Platform
 import           GHCup.Utils.Dirs
+import           GHCup.Utils.Logger
 import           GHCup.Types.JSON               ( )
 
 import           Control.Monad.Trans.Reader     ( runReaderT )
 import           Control.Monad.IO.Class
 import           Data.Char                      ( toLower )
+import           Data.Maybe
 #if !MIN_VERSION_base(4,13,0)
 import           Data.Semigroup                 ( (<>) )
 #endif
 import           Options.Applicative     hiding ( style )
 import           Haskus.Utils.Variant.Excepts
 import           System.Console.Pretty
+import           System.Environment
 import           System.Exit
 import           System.IO                      ( stderr )
 import           Text.Regex.Posix
@@ -114,12 +116,14 @@ com = subparser
 
 main :: IO ()
 main = do
-  let loggerConfig = LoggerConfig { lcPrintDebug = True
-                                  , colorOutter  = T.hPutStr stderr
-                                  , rawOutter    = \_ -> pure ()
+  no_color <- isJust <$> lookupEnv "NO_COLOR"
+  let loggerConfig = LoggerConfig { lcPrintDebug  = True
+                                  , consoleOutter = T.hPutStr stderr
+                                  , fileOutter    = \_ -> pure ()
+                                  , fancyColors   = not no_color
                                   }
   dirs <- liftIO getAllDirs
-  let leanAppstate = LeanAppState (Settings True False Never Curl True GHCupURL False) dirs defaultKeyBindings loggerConfig
+  let leanAppstate = LeanAppState (Settings True False Never Curl True GHCupURL False GPGNone False) dirs defaultKeyBindings loggerConfig
 
   pfreq <- (
     flip runReaderT leanAppstate . runE @'[NoCompatiblePlatform, NoCompatibleArch, DistroNotFound] $ platformRequest
@@ -129,7 +133,7 @@ main = do
               flip runReaderT leanAppstate $ logError $ T.pack $ prettyShow e
               liftIO $ exitWith (ExitFailure 2)
 
-  let appstate = AppState (Settings True False Never Curl True GHCupURL False) dirs defaultKeyBindings (GHCupInfo mempty mempty mempty) pfreq loggerConfig
+  let appstate = AppState (Settings True False Never Curl True GHCupURL False GPGNone False) dirs defaultKeyBindings (GHCupInfo mempty mempty mempty) pfreq loggerConfig
 
   _ <- customExecParser (prefs showHelpOnError) (info (opts <**> helper) idm)
     >>= \Options {..} -> case optCommand of

app/ghcup-gen/Validate.hs

@@ -15,6 +15,7 @@ import           GHCup.Errors
 import           GHCup.Types
 import           GHCup.Types.Optics
 import           GHCup.Utils
+import           GHCup.Utils.Logger
 import           GHCup.Utils.Version.QQ
 
 import           Codec.Archive
@@ -229,6 +230,7 @@ validateTarballs (TarballFilter etool versionRegex) dls gt = do
   downloadAll ref dli = do
     r <- runResourceT
       . runE @'[DigestError
+               , GPGError
                , DownloadFailed
                , UnknownArchive
                , ArchiveResult
@@ -237,7 +239,7 @@ validateTarballs (TarballFilter etool versionRegex) dls gt = do
         case etool of
           Right (Just GHCup) -> do
             tmpUnpack <- lift mkGhcupTmpDir
-            _ <- liftE $ download (_dlUri dli) (Just (_dlHash dli)) tmpUnpack Nothing False
+            _ <- liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) tmpUnpack Nothing False
             pure Nothing
           Right _ -> do
             p <- liftE $ downloadCached dli Nothing
@@ -247,7 +249,7 @@ validateTarballs (TarballFilter etool versionRegex) dls gt = do
               $ p
           Left ShimGen -> do
             tmpUnpack <- lift mkGhcupTmpDir
-            _ <- liftE $ download (_dlUri dli) (Just (_dlHash dli)) tmpUnpack Nothing False
+            _ <- liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) tmpUnpack Nothing False
             pure Nothing
     case r of
       VRight (Just basePath) -> do

app/ghcup/BrickMain.hs

@@ -13,9 +13,9 @@ module BrickMain where
 import           GHCup
 import           GHCup.Download
 import           GHCup.Errors
-import           GHCup.Types.Optics  hiding ( getGHCupInfo )
 import           GHCup.Types         hiding ( LeanAppState(..) )
 import           GHCup.Utils
+import           GHCup.Utils.Logger
 import           GHCup.Utils.Prelude ( decUTF8Safe )
 import           GHCup.Utils.File
 
@@ -43,7 +43,6 @@ import           Data.Vector                    ( Vector
 import           Data.Versions           hiding ( str )
 import           Haskus.Utils.Variant.Excepts
 import           Prelude                 hiding ( appendFile )
-import           System.Environment
 import           System.Exit
 import           System.IO.Unsafe
 import           Text.PrettyPrint.HughesPJClass ( prettyShow )
@@ -429,30 +428,32 @@ install' _ (_, ListResult {..}) = do
               , BuildFailed
               , TagNotFound
               , DigestError
+              , GPGError
               , DownloadFailed
               , DirNotEmpty
               , NoUpdate
               , TarDirDoesNotExist
               , FileAlreadyExistsError
+              , ProcessError
               ]
 
   run (do
       case lTool of
         GHC   -> do
           let vi = getVersionInfo lVer GHC dls
-          liftE $ installGHCBin lVer Nothing $> vi
+          liftE $ installGHCBin lVer Nothing False $> vi
         Cabal -> do
           let vi = getVersionInfo lVer Cabal dls
-          liftE $ installCabalBin lVer Nothing $> vi
+          liftE $ installCabalBin lVer Nothing False $> vi
         GHCup -> do
           let vi = snd <$> getLatest dls GHCup
           liftE $ upgradeGHCup Nothing False $> vi
         HLS   -> do
           let vi = getVersionInfo lVer HLS dls
-          liftE $ installHLSBin lVer Nothing $> vi
+          liftE $ installHLSBin lVer Nothing False $> vi
         Stack -> do
           let vi = getVersionInfo lVer Stack dls
-          liftE $ installStackBin lVer Nothing $> vi
+          liftE $ installStackBin lVer Nothing False $> vi
     )
     >>= \case
           VRight vi                         -> do
@@ -536,9 +537,10 @@ settings' :: IORef AppState
 {-# NOINLINE settings' #-}
 settings' = unsafePerformIO $ do
   dirs <- getAllDirs
-  let loggerConfig = LoggerConfig { lcPrintDebug = False
-                                  , colorOutter  = \_ -> pure ()
-                                  , rawOutter    = \_ -> pure ()
+  let loggerConfig = LoggerConfig { lcPrintDebug  = False
+                                  , consoleOutter = \_ -> pure ()
+                                  , fileOutter    = \_ -> pure ()
+                                  , fancyColors   = True
                                   }
   newIORef $ AppState (Settings { cache      = True
                                 , noVerify   = False
@@ -547,6 +549,8 @@ settings' = unsafePerformIO $ do
                                 , verbose    = False
                                 , urlSource  = GHCupURL
                                 , noNetwork  = False
+                                , gpgSetting = GPGNone
+                                , noColor    = False
                                 , ..
                                 })
                       dirs
@@ -562,13 +566,11 @@ brickMain :: AppState
 brickMain s = do
   writeIORef settings' s
 
-  no_color <- isJust <$> lookupEnv "NO_COLOR"
-
   eAppData <- getAppData (Just $ ghcupInfo s)
   case eAppData of
     Right ad ->
       defaultMain
-          (app (defaultAttributes no_color) (dimAttributes no_color))
+          (app (defaultAttributes (noColor $ settings s)) (dimAttributes (noColor $ settings s)))
           (BrickState ad
                     defaultAppSettings
                     (constructList ad defaultAppSettings Nothing)
@@ -591,7 +593,7 @@ getGHCupInfo = do
 
   r <-
     flip runReaderT settings
-    . runE @'[JSONError , DownloadFailed , FileDoesNotExistError]
+    . runE @'[DigestError, GPGError, JSONError , DownloadFailed , FileDoesNotExistError]
     $ liftE
     $ getDownloadsF
 

app/ghcup/Main.hs

@@ -49,7 +49,6 @@ import           Data.Char
 import           Data.Either
 import           Data.Functor
 import           Data.List                      ( intercalate, nub, sort, sortBy )
-import           Data.List.NonEmpty             (NonEmpty ((:|)))
 import           Data.Maybe
 import           Data.Text                      ( Text )
 import           Data.Versions           hiding ( str )
@@ -87,21 +86,23 @@ import qualified Text.Megaparsec.Char          as MPC
 data Options = Options
   {
   -- global options
-    optVerbose   :: Maybe Bool
-  , optCache     :: Maybe Bool
-  , optUrlSource :: Maybe URI
-  , optNoVerify  :: Maybe Bool
-  , optKeepDirs  :: Maybe KeepDirs
+    optVerbose     :: Maybe Bool
+  , optCache       :: Maybe Bool
+  , optUrlSource   :: Maybe URI
+  , optNoVerify    :: Maybe Bool
+  , optKeepDirs    :: Maybe KeepDirs
   , optsDownloader :: Maybe Downloader
-  , optNoNetwork :: Maybe Bool
+  , optNoNetwork   :: Maybe Bool
+  , optGpg         :: Maybe GPGSetting
   -- commands
-  , optCommand   :: Command
+  , optCommand     :: Command
   }
 
 data Command
   = Install (Either InstallCommand InstallOptions)
   | InstallCabalLegacy InstallOptions
   | Set (Either SetCommand SetOptions)
+  | UnSet UnsetCommand
   | List ListOptions
   | Rm (Either RmCommand RmOptions)
   | DInfo
@@ -116,6 +117,7 @@ data Command
   | Interactive
 #endif
   | Prefetch PrefetchCommand
+  | GC GCOptions
 
 data ToolVersion = ToolVersion GHCTargetVersion -- target is ignored for cabal
                  | ToolTag Tag
@@ -141,6 +143,16 @@ data InstallOptions = InstallOptions
   , instBindist  :: Maybe URI
   , instSet      :: Bool
   , isolateDir   :: Maybe FilePath
+  , forceInstall :: Bool
+  }
+
+data GCOptions = GCOptions
+  { gcOldGHC :: Bool
+  , gcProfilingLibs :: Bool
+  , gcShareDir :: Bool
+  , gcHLSNoGHC :: Bool
+  , gcCache :: Bool
+  , gcTmp :: Bool
   }
 
 data SetCommand = SetGHC SetOptions
@@ -148,6 +160,11 @@ data SetCommand = SetGHC SetOptions
                 | SetHLS SetOptions
                 | SetStack SetOptions
 
+data UnsetCommand = UnsetGHC   UnsetOptions
+                  | UnsetCabal UnsetOptions
+                  | UnsetHLS   UnsetOptions
+                  | UnsetStack UnsetOptions
+
 -- a superset of ToolVersion
 data SetToolVersion = SetToolVersion GHCTargetVersion
                     | SetToolTag Tag
@@ -158,6 +175,10 @@ data SetOptions = SetOptions
   { sToolVer :: SetToolVersion
   }
 
+data UnsetOptions = UnsetOptions
+  { sToolVer :: Maybe Text -- target platform triple
+  }
+
 data ListOptions = ListOptions
   { loTool     :: Maybe Tool
   , lCriteria  :: Maybe ListCriteria
@@ -175,6 +196,7 @@ data RmOptions = RmOptions
 
 
 data CompileCommand = CompileGHC GHCCompileOptions
+                    | CompileHLS HLSCompileOptions
 
 data ConfigCommand = ShowConfig | SetConfig String String | InitConfig
 
@@ -193,6 +215,18 @@ data GHCCompileOptions = GHCCompileOptions
   , isolateDir   :: Maybe FilePath
   }
 
+data HLSCompileOptions = HLSCompileOptions
+  { targetHLS    :: Either Version GitBranch
+  , jobs         :: Maybe Int
+  , setCompile   :: Bool
+  , ovewrwiteVer :: Maybe Version
+  , isolateDir   :: Maybe FilePath
+  , cabalProject :: Maybe FilePath
+  , cabalProjectLocal :: Maybe FilePath
+  , patchDir     :: Maybe FilePath
+  , targetGHCs   :: [ToolVersion]
+  }
+
 data UpgradeOpts = UpgradeInplace
                  | UpgradeAt FilePath
                  | UpgradeGHCupDir
@@ -309,6 +343,13 @@ opts =
           <> hidden
           ))
     <*> invertableSwitch "offline" 'o' False (help "Don't do any network calls, trying cached assets and failing if missing.")
+    <*> optional (option
+          (eitherReader gpgParser)
+          (  long "gpg"
+          <> metavar "<strict|lax|none>"
+          <> help
+          "GPG verification (default: none)"
+          ))
     <*> com
  where
   parseUri s' =
@@ -348,6 +389,14 @@ com =
              <> footerDoc (Just $ text setFooter)
              )
            )
+      <> command
+           "unset"
+           (info
+             (UnSet <$> unsetParser <**> helper)
+             (  progDesc "Unset currently active GHC/cabal version"
+             <> footerDoc (Just $ text unsetFooter)
+             )
+           )
       <> command
            "rm"
            (info
@@ -399,6 +448,16 @@ com =
              (progDesc "Prefetch assets"
              <> footerDoc ( Just $ text prefetchFooter ))
            )
+      <> command
+           "gc"
+            (info
+             (   (GC
+                     <$> gcP
+                 ) <**> helper
+             )
+             (progDesc "Garbage collection"
+             <> footerDoc ( Just $ text gcFooter ))
+           )
       <> commandGroup "Main commands:"
       )
     <|> subparser
@@ -445,6 +504,7 @@ com =
                (info (pure Nuke <**> helper)
                      (progDesc "Completely remove ghcup from your system"))
            <> commandGroup "Nuclear Commands:"
+           <> hidden
           )
 
  where
@@ -461,6 +521,10 @@ com =
   is given, sets GHC to 'recommended' version).
   It is recommended to always specify a subcommand (ghc/cabal/hls/stack).|]
 
+  unsetFooter :: String
+  unsetFooter = [s|Discussion:
+  Unsets the currently active GHC or cabal version.|]
+
   rmFooter :: String
   rmFooter = [s|Discussion:
   Remove the given GHC or cabal version. When no command is given,
@@ -499,6 +563,10 @@ Examples:
   ghcup prefetch ghc 8.10.5
   ghcup --offline install ghc 8.10.5|]
 
+  gcFooter :: String
+  gcFooter = [s|Discussion:
+  Performs garbage collection. If no switches are specified, does nothing.|]
+
 configFooter :: String
 configFooter = [s|Examples:
 
@@ -602,7 +670,7 @@ Examples:
 
 installOpts :: Maybe Tool -> Parser InstallOptions
 installOpts tool =
-  (\p (u, v) b is -> InstallOptions v p u b is)
+  (\p (u, v) b is f -> InstallOptions v p u b is f)
     <$> optional
           (option
             (eitherReader platformParser)
@@ -640,6 +708,9 @@ installOpts tool =
            <> help "install in an isolated dir instead of the default one"
            )
           )
+    <*> switch
+          (short 'f' <> long "force" <> help "Force install")
+          
 
 
 setParser :: Parser (Either SetCommand SetOptions)
@@ -703,19 +774,81 @@ setParser =
   setHLSFooter = [s|Discussion:
     Sets the the current haskell-language-server version.|]
 
+unsetParser :: Parser UnsetCommand
+unsetParser =
+  (subparser
+      (  command
+          "ghc"
+          (   UnsetGHC
+          <$> info
+                (unsetOpts <**> helper)
+                (  progDesc "Unset GHC version"
+                <> footerDoc (Just $ text unsetGHCFooter)
+                )
+          )
+      <> command
+           "cabal"
+           (   UnsetCabal
+           <$> info
+                (unsetOpts <**> helper)
+                 (  progDesc "Unset Cabal version"
+                 <> footerDoc (Just $ text unsetCabalFooter)
+                 )
+           )
+      <> command
+           "hls"
+           (   UnsetHLS
+           <$> info
+                 (unsetOpts <**> helper)
+                 (  progDesc "Unset haskell-language-server version"
+                 <> footerDoc (Just $ text unsetHLSFooter)
+                 )
+           )
+      <> command
+           "stack"
+           (   UnsetStack
+           <$> info
+                 (unsetOpts <**> helper)
+                 (  progDesc "Unset stack version"
+                 <> footerDoc (Just $ text unsetStackFooter)
+                 )
+           )
+      )
+    )
+ where
+  unsetGHCFooter :: String
+  unsetGHCFooter = [s|Discussion:
+    Unsets the the current GHC version. That means there won't
+    be a ~/.ghcup/bin/ghc anymore.|]
+
+  unsetCabalFooter :: String
+  unsetCabalFooter = [s|Discussion:
+    Unsets the the current Cabal version.|]
+
+  unsetStackFooter :: String
+  unsetStackFooter = [s|Discussion:
+    Unsets the the current Stack version.|]
+
+  unsetHLSFooter :: String
+  unsetHLSFooter = [s|Discussion:
+    Unsets the the current haskell-language-server version.|]
+
 
 setOpts :: Maybe Tool -> Parser SetOptions
 setOpts tool = SetOptions <$>
     (fromMaybe SetRecommended <$>
       optional (setVersionArgument (Just ListInstalled) tool))
 
+unsetOpts :: Parser UnsetOptions
+unsetOpts = UnsetOptions . fmap T.pack <$> optional (argument str (metavar "TRIPLE"))
+
 listOpts :: Parser ListOptions
 listOpts =
   ListOptions
     <$> optional
           (option
             (eitherReader toolParser)
-            (short 't' <> long "tool" <> metavar "<ghc|cabal>" <> help
+            (short 't' <> long "tool" <> metavar "<ghc|cabal|hls|stack>" <> help
               "Tool to list versions for. Default is all"
             )
           )
@@ -724,8 +857,8 @@ listOpts =
             (eitherReader criteriaParser)
             (  short 'c'
             <> long "show-criteria"
-            <> metavar "<installed|set>"
-            <> help "Show only installed or set tool versions"
+            <> metavar "<installed|set|available>"
+            <> help "Show only installed/set/available tool versions"
             )
           )
     <*> switch
@@ -799,6 +932,15 @@ compileP = subparser
             <> footerDoc (Just $ text compileFooter)
             )
       )
+  <>  command
+      "hls"
+      (   CompileHLS
+      <$> info
+            (hlsCompileOpts <**> helper)
+            (  progDesc "Compile HLS from source"
+            <> footerDoc (Just $ text compileHLSFooter)
+            )
+      )
   )
  where
   compileFooter = [s|Discussion:
@@ -823,6 +965,14 @@ Examples:
   # build cross compiler
   ghcup compile ghc -j 4 -v 8.4.2 -b 8.2.2 -x armv7-unknown-linux-gnueabihf --config $(pwd)/build.mk -- --enable-unregisterised|]
 
+  compileHLSFooter = [s|Discussion:
+  Compiles and installs the specified HLS version.
+  The last argument is a list of GHC versions to compile for.
+  These need to be available in PATH prior to compilation.
+
+Examples:
+  ghcup compile hls -v 1.4.0 -j 12 8.10.5 8.10.7 9.0.1|]
+
 configP :: Parser ConfigCommand
 configP = subparser
       (  command "init" initP
@@ -997,6 +1147,28 @@ prefetchP = subparser
       )
   )
 
+gcP :: Parser GCOptions
+gcP =
+  GCOptions
+  <$> 
+    switch
+      (short 'o' <> long "ghc-old" <> help "Remove GHC versions marked as 'old'")
+  <*> 
+    switch
+      (short 'p' <> long "profiling-libs" <> help "Remove profiling libs of GHC versions")
+  <*> 
+    switch
+      (short 's' <> long "share-dir" <> help "Remove GHC share directories (documentation)")
+  <*> 
+    switch
+      (short 'h' <> long "hls-no-ghc" <> help "Remove HLS versions that don't have a corresponding installed GHC version")
+  <*> 
+    switch
+      (short 'c' <> long "cache" <> help "GC the GHCup cache")
+  <*> 
+    switch
+      (short 't' <> long "tmpdirs" <> help "Remove tmpdir leftovers")
+
 
 ghcCompileOpts :: Parser GHCCompileOptions
 ghcCompileOpts =
@@ -1092,6 +1264,78 @@ ghcCompileOpts =
             )
            )
 
+hlsCompileOpts :: Parser HLSCompileOptions
+hlsCompileOpts =
+  HLSCompileOptions
+    <$> ((Left <$> option
+          (eitherReader
+            (first (const "Not a valid version") . version . T.pack)
+          )
+          (short 'v' <> long "version" <> metavar "VERSION" <> help
+            "The tool version to compile"
+          )
+          ) <|>
+          (Right <$> (GitBranch <$> option
+          str
+          (short 'g' <> long "git-ref" <> metavar "GIT_REFERENCE" <> help
+            "The git commit/branch/ref to build from"
+          ) <*>
+          optional (option str (short 'r' <> long "repository" <> metavar "GIT_REPOSITORY" <> help "The git repository to build from (defaults to GHC upstream)"))
+          )))
+    <*> optional
+          (option
+            (eitherReader (readEither @Int))
+            (short 'j' <> long "jobs" <> metavar "JOBS" <> help
+              "How many jobs to use for make"
+            )
+          )
+    <*> flag
+          False
+          True
+          (long "set" <> help
+            "Set as active version after install"
+          )
+    <*> optional
+          (option
+            (eitherReader
+              (first (const "Not a valid version") . version . T.pack)
+            )
+            (short 'o' <> long "overwrite-version" <> metavar "OVERWRITE_VERSION" <> help
+              "Allows to overwrite the finally installed VERSION with a different one, e.g. when you build 8.10.4 with your own patches, you might want to set this to '8.10.4-p1'"
+            )
+          )
+    <*> optional
+          (option
+            (eitherReader isolateParser)
+            (  short 'i'
+            <> long "isolate"
+            <> metavar "DIR"
+            <> help "install in an isolated directory instead of the default one, no symlinks to this installation will be made"
+            )
+           )
+    <*> optional
+          (option
+            str
+            (long "cabal-project" <> metavar "CABAL_PROJECT" <> help
+              "If relative, specifies the path to cabal.project inside the unpacked HLS tarball/checkout. If absolute, will copy the file over."
+            )
+          )
+    <*> optional
+          (option
+            (eitherReader absolutePathParser)
+            (long "cabal-project-local" <> metavar "CABAL_PROJECT_LOCAL" <> help
+              "Absolute path to a cabal.project.local to be used for the build. Will be copied over."
+            )
+          )
+    <*> optional
+          (option
+            (eitherReader absolutePathParser)
+            (short 'p' <> long "patchdir" <> metavar "PATCH_DIR" <> help
+              "Absolute path to patch directory (applies all .patch and .diff files in order using -p1)"
+            )
+          )
+    <*> some (toolVersionArgument Nothing (Just GHC))
+
 
 toolVersionParser :: Parser ToolVersion
 toolVersionParser = verP' <|> toolP
@@ -1107,9 +1351,13 @@ toolVersionParser = verP' <|> toolP
 toolVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser ToolVersion
 toolVersionArgument criteria tool =
   argument (eitherReader toolVersionEither)
-    (metavar "VERSION|TAG"
+    (metavar (mv tool)
     <> completer (tagCompleter (fromMaybe GHC tool) [])
     <> foldMap (completer . versionCompleter criteria) tool)
+ where
+  mv (Just GHC) = "GHC_VERSION|TAG"
+  mv (Just HLS) = "HLS_VERSION|TAG"
+  mv _          = "VERSION|TAG"
 
 
 setVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser SetToolVersion
@@ -1136,12 +1384,13 @@ tagCompleter :: Tool -> [String] -> Completer
 tagCompleter tool add = listIOCompleter $ do
   dirs' <- liftIO getAllDirs
   let loggerConfig = LoggerConfig
-        { lcPrintDebug = False
-        , colorOutter  = mempty
-        , rawOutter    = mempty
+        { lcPrintDebug   = False
+        , consoleOutter  = mempty
+        , fileOutter     = mempty
+        , fancyColors    = False
         }
   let appState = LeanAppState
-        (Settings True False Never Curl False GHCupURL True)
+        (Settings True False Never Curl False GHCupURL True GPGNone False)
         dirs'
         defaultKeyBindings
         loggerConfig
@@ -1162,11 +1411,12 @@ versionCompleter :: Maybe ListCriteria -> Tool -> Completer
 versionCompleter criteria tool = listIOCompleter $ do
   dirs' <- liftIO getAllDirs
   let loggerConfig = LoggerConfig
-        { lcPrintDebug = False
-        , colorOutter  = mempty
-        , rawOutter    = mempty
+        { lcPrintDebug   = False
+        , consoleOutter  = mempty
+        , fileOutter     = mempty
+        , fancyColors    = False
         }
-  let settings = Settings True False Never Curl False GHCupURL True
+  let settings = Settings True False Never Curl False GHCupURL True GPGNone False
   let leanAppState = LeanAppState
                    settings
                    dirs'
@@ -1225,6 +1475,8 @@ toolVersionEither s' =
 toolParser :: String -> Either String Tool
 toolParser s' | t == T.pack "ghc"   = Right GHC
               | t == T.pack "cabal" = Right Cabal
+              | t == T.pack "hls"   = Right HLS
+              | t == T.pack "stack" = Right Stack
               | otherwise           = Left ("Unknown tool: " <> s')
   where t = T.toLower (T.pack s')
 
@@ -1232,6 +1484,7 @@ toolParser s' | t == T.pack "ghc"   = Right GHC
 criteriaParser :: String -> Either String ListCriteria
 criteriaParser s' | t == T.pack "installed" = Right ListInstalled
                   | t == T.pack "set"       = Right ListSet
+                  | t == T.pack "available" = Right ListAvailable
                   | otherwise               = Left ("Unknown criteria: " <> s')
   where t = T.toLower (T.pack s')
 
@@ -1253,6 +1506,13 @@ downloaderParser s' | t == T.pack "curl"     = Right Curl
                     | otherwise = Left ("Unknown downloader value: " <> s')
   where t = T.toLower (T.pack s')
 
+gpgParser :: String -> Either String GPGSetting
+gpgParser s' | t == T.pack "strict" = Right GPGStrict
+             | t == T.pack "lax"    = Right GPGLax
+             | t == T.pack "none"   = Right GPGNone
+             | otherwise = Left ("Unknown gpg setting value: " <> s')
+  where t = T.toLower (T.pack s')
+
 
 platformParser :: String -> Either String PlatformRequest
 platformParser s' = case MP.parse (platformP <* MP.eof) "" (T.pack s') of
@@ -1311,8 +1571,14 @@ isolateParser f = case isValid f of
               True -> Right $ normalise f
               False -> Left "Please enter a valid filepath for isolate dir."
 
+absolutePathParser :: FilePath -> Either String FilePath
+absolutePathParser f = case isValid f && isAbsolute f of
+              True -> Right $ normalise f
+              False -> Left "Please enter a valid absolute filepath."
+
 toSettings :: Options -> IO (Settings, KeyBindings)
 toSettings options = do
+  noColor <- isJust <$> lookupEnv "NO_COLOR"
   userConf <- runE @'[ JSONError ] ghcupConfigFile >>= \case
     VRight r -> pure r
     VLeft (V (JSONDecodeError e)) -> do
@@ -1320,10 +1586,10 @@ toSettings options = do
       pure defaultUserSettings
     _ -> do
       die "Unexpected error!"
-  pure $ mergeConf options userConf
+  pure $ mergeConf options userConf noColor
  where
-   mergeConf :: Options -> UserSettings -> (Settings, KeyBindings)
-   mergeConf Options{..} UserSettings{..} =
+   mergeConf :: Options -> UserSettings -> Bool -> (Settings, KeyBindings)
+   mergeConf Options{..} UserSettings{..} noColor =
      let cache       = fromMaybe (fromMaybe False uCache) optCache
          noVerify    = fromMaybe (fromMaybe False uNoVerify) optNoVerify
          verbose     = fromMaybe (fromMaybe False uVerbose) optVerbose
@@ -1332,6 +1598,7 @@ toSettings options = do
          keyBindings = maybe defaultKeyBindings mergeKeys uKeyBindings
          urlSource   = maybe (fromMaybe GHCupURL uUrlSource) OwnSource optUrlSource
          noNetwork   = fromMaybe (fromMaybe False uNoNetwork) optNoNetwork
+         gpgSetting  = fromMaybe (fromMaybe GPGNone uGPGSetting) optGpg
      in (Settings {..}, keyBindings)
 #if defined(INTERNAL_DOWNLOADER)
    defaultDownloader = Internal
@@ -1367,7 +1634,8 @@ updateSettings config settings = do
          verbose'    = fromMaybe verbose uVerbose
          urlSource'  = fromMaybe urlSource uUrlSource
          noNetwork'  = fromMaybe noNetwork uNoNetwork
-     in Settings cache' noVerify' keepDirs' downloader' verbose' urlSource' noNetwork'
+         gpgSetting' = fromMaybe gpgSetting uGPGSetting
+     in Settings cache' noVerify' keepDirs' downloader' verbose' urlSource' noNetwork' gpgSetting' noColor
 
 upgradeOptsP :: Parser UpgradeOpts
 upgradeOptsP =
@@ -1392,7 +1660,7 @@ describe_result = $( LitE . StringL <$>
                      runIO (do
                              CapturedProcess{..} <-  do
                               dirs <- liftIO getAllDirs
-                              let settings = AppState (Settings True False Never Curl False GHCupURL False)
+                              let settings = AppState (Settings True False Never Curl False GHCupURL False GPGNone False)
                                                dirs
                                                defaultKeyBindings
                               flip runReaderT settings $ executeOut "git" ["describe"] Nothing
@@ -1472,17 +1740,19 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
 
           -- logger interpreter
           logfile <- flip runReaderT dirs initGHCupFileLogging
+          no_color <- isJust <$> lookupEnv "NO_COLOR"
           let loggerConfig = LoggerConfig
                 { lcPrintDebug = verbose settings
-                , colorOutter  = T.hPutStr stderr
-                , rawOutter    =
+                , consoleOutter  = T.hPutStr stderr
+                , fileOutter    =
                     case optCommand of
                       Nuke -> \_ -> pure ()
                       _ -> T.appendFile logfile
+                , fancyColors = not no_color
                 }
           let leanAppstate = LeanAppState settings dirs keybindings loggerConfig
           let runLogger = flip runReaderT leanAppstate
-          let siletRunLogger = flip runReaderT (leanAppstate { loggerConfig = loggerConfig { colorOutter = \_ -> pure () } } :: LeanAppState)
+          let siletRunLogger = flip runReaderT (leanAppstate { loggerConfig = loggerConfig { consoleOutter = \_ -> pure () } } :: LeanAppState)
 
 
           -------------------------
@@ -1502,7 +1772,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
 
                 ghcupInfo <-
                   ( flip runReaderT leanAppstate
-                    . runE @'[JSONError , DownloadFailed, FileDoesNotExistError]
+                    . runE @'[DigestError, GPGError, JSONError , DownloadFailed, FileDoesNotExistError]
                     $ liftE
                     $ getDownloadsF
                     )
@@ -1523,6 +1793,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                   DInfo -> pure ()
                   ToolRequirements -> pure ()
                   ChangeLog _ -> pure ()
+                  UnSet _ -> pure ()
 #if defined(BRICK)
                   Interactive -> pure ()
 #endif
@@ -1575,11 +1846,13 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                       , BuildFailed
                       , TagNotFound
                       , DigestError
+                      , GPGError
                       , DownloadFailed
                       , TarDirDoesNotExist
                       , NextVerNotFound
                       , NoToolVersionSet
                       , FileAlreadyExistsError
+                      , ProcessError
                       ]
 
           let runInstTool mInstPlatform action' = do
@@ -1607,6 +1880,11 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                     , NoToolVersionSet
                     ]
 
+            runUnsetGHC =
+                runLeanAppState
+                . runE
+                  @'[ NotInstalled ]
+
           let
             runLeanSetCabal =
                 runLeanAppState
@@ -1665,6 +1943,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                     @'[ AlreadyInstalled
                       , BuildFailed
                       , DigestError
+                      , GPGError
                       , DownloadFailed
                       , GHCupSetError
                       , NoDownload
@@ -1675,6 +1954,35 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                       , NotInstalled
                       , DirNotEmpty
                       , ArchiveResult
+                      , FileDoesNotExistError
+                      , HadrianNotFound
+                      , InvalidBuildConfig
+                      , ProcessError
+                      , CopyError
+                      , BuildFailed
+                      ]
+
+          let runCompileHLS =
+                  runAppState
+                  . runResourceT
+                  . runE
+                    @'[ AlreadyInstalled
+                      , BuildFailed
+                      , DigestError
+                      , GPGError
+                      , DownloadFailed
+                      , GHCupSetError
+                      , NoDownload
+                      , NotFoundInPATH
+                      , PatchFailed
+                      , UnknownArchive
+                      , TarDirDoesNotExist
+                      , TagNotFound
+                      , NextVerNotFound
+                      , NoToolVersionSet
+                      , NotInstalled
+                      , DirNotEmpty
+                      , ArchiveResult
                       ]
 
           let
@@ -1703,6 +2011,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                   . runResourceT
                   . runE
                     @'[ DigestError
+                      , GPGError
                       , NoDownload
                       , NoUpdate
                       , FileDoesNotExistError
@@ -1719,11 +2028,19 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                       , NoToolVersionSet
                       , NoDownload
                       , DigestError
+                      , GPGError
                       , DownloadFailed
                       , JSONError
                       , FileDoesNotExistError
                       ]
 
+          let runGC =
+                  runAppState
+                  . runResourceT
+                  . runE
+                    @'[ NotInstalled
+                      ]
+
 
           -----------------------
           -- Command functions --
@@ -1733,7 +2050,10 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                 (case instBindist of
                    Nothing -> runInstTool instPlatform $ do
                      (v, vi) <- liftE $ fromVersion instVer GHC
-                     liftE $ installGHCBin (_tvVersion v) isolateDir
+                     liftE $ installGHCBin
+                               (_tvVersion v)
+                               isolateDir
+                               forceInstall
                      when instSet $ void $ liftE $ setGHC v SetGHCOnly
                      pure vi
                    Just uri -> do
@@ -1741,9 +2061,10 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                      runInstTool' s'{ settings = settings {noVerify = True}} instPlatform $ do
                        (v, vi) <- liftE $ fromVersion instVer GHC
                        liftE $ installGHCBindist
-                         (DownloadInfo uri (Just $ RegexDir "ghc-.*") "")
-                         (_tvVersion v)
-                         isolateDir
+                                 (DownloadInfo uri (Just $ RegexDir "ghc-.*") "")
+                                 (_tvVersion v)
+                                 isolateDir
+                                 forceInstall
                        when instSet $ void $ liftE $ setGHC v SetGHCOnly
                        pure vi
                   )
@@ -1755,8 +2076,12 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                             pure ExitSuccess
                           VLeft (V (AlreadyInstalled _ v)) -> do
                             runLogger $ logWarn $
-                              "GHC ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup rm ghc " <> prettyVer v <> "' first"
+                              "GHC ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install ghc --force " <> prettyVer v <> "'"
                             pure ExitSuccess
+                          VLeft (V (DirNotEmpty fp)) -> do
+                            runLogger $ logWarn $
+                              "Install directory " <> T.pack fp <> " is not empty. Use 'ghcup install ghc --isolate " <> T.pack fp <> " --force ..." <> "' to install regardless."
+                            pure $ ExitFailure 3
                           VLeft err@(V (BuildFailed tmpdir _)) -> do
                             case keepDirs settings of
                               Never -> runLogger $ (logError $ T.pack $ prettyShow err)
@@ -1775,16 +2100,20 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                 (case instBindist of
                    Nothing -> runInstTool instPlatform $ do
                      (v, vi) <- liftE $ fromVersion instVer Cabal
-                     liftE $ installCabalBin (_tvVersion v) isolateDir
+                     liftE $ installCabalBin
+                               (_tvVersion v)
+                               isolateDir
+                               forceInstall
                      pure vi
                    Just uri -> do
                      s' <- appState
                      runInstTool' s'{ settings = settings { noVerify = True}} instPlatform $ do
                        (v, vi) <- liftE $ fromVersion instVer Cabal
-                       liftE $ installCabalBindist
-                           (DownloadInfo uri Nothing "")
-                           (_tvVersion v)
-                           isolateDir
+                       liftE $ installCabalBindist 
+                                 (DownloadInfo uri Nothing "")
+                                 (_tvVersion v)
+                                 isolateDir
+                                 forceInstall
                        pure vi
                   )
                   >>= \case
@@ -1795,8 +2124,12 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                           pure ExitSuccess
                         VLeft (V (AlreadyInstalled _ v)) -> do
                           runLogger $ logWarn $
-                            "Cabal ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup rm cabal " <> prettyVer v <> "' first"
+                            "Cabal ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install cabal --force " <> prettyVer v <> "'"
                           pure ExitSuccess
+                        VLeft (V (FileAlreadyExistsError fp)) -> do
+                          runLogger $ logWarn $
+                            "File " <> T.pack fp <> " already exists. Use 'ghcup install cabal --isolate " <> T.pack fp <> " --force ..." <> "' if you want to overwrite."
+                          pure $ ExitFailure 3
                         VLeft e -> do
                           runLogger $ do
                             logError $ T.pack $ prettyShow e
@@ -1807,16 +2140,20 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                  (case instBindist of
                    Nothing -> runInstTool instPlatform $ do
                      (v, vi) <- liftE $ fromVersion instVer HLS
-                     liftE $ installHLSBin (_tvVersion v) isolateDir
+                     liftE $ installHLSBin
+                               (_tvVersion v)
+                               isolateDir
+                               forceInstall
                      pure vi
                    Just uri -> do
                      s' <- appState
                      runInstTool' s'{ settings = settings { noVerify = True}} instPlatform $ do
                        (v, vi) <- liftE $ fromVersion instVer HLS
                        liftE $ installHLSBindist
-                           (DownloadInfo uri Nothing "")
-                           (_tvVersion v)
-                           isolateDir
+                                 (DownloadInfo uri Nothing "")
+                                 (_tvVersion v)
+                                 isolateDir
+                                 forceInstall
                        pure vi
                   )
                   >>= \case
@@ -1829,10 +2166,14 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                           runLogger $ logWarn $
                               "HLS ver "
                             <> prettyVer v
-                            <> " already installed; if you really want to reinstall it, you may want to run 'ghcup rm hls "
+                            <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install hls --force "
                             <> prettyVer v
-                            <> "' first"
+                            <> "'"
                           pure ExitSuccess
+                        VLeft (V (FileAlreadyExistsError fp)) -> do
+                          runLogger $ logWarn $
+                            "File " <> T.pack fp <> " already exists. Use 'ghcup install hls --isolate " <> T.pack fp <> " --force ..." <> "' if you want to overwrite."
+                          pure $ ExitFailure 3
                         VLeft e -> do
                           runLogger $ do
                             logError $ T.pack $ prettyShow e
@@ -1843,16 +2184,20 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                  (case instBindist of
                     Nothing -> runInstTool instPlatform $ do
                       (v, vi) <- liftE $ fromVersion instVer Stack
-                      liftE $ installStackBin (_tvVersion v) isolateDir
+                      liftE $ installStackBin
+                                (_tvVersion v)
+                                isolateDir
+                                forceInstall
                       pure vi
                     Just uri -> do
                       s' <- appState
                       runInstTool' s'{ settings = settings { noVerify = True}} instPlatform $ do
                         (v, vi) <- liftE $ fromVersion instVer Stack
                         liftE $ installStackBindist
-                            (DownloadInfo uri Nothing "")
-                            (_tvVersion v)
-                            isolateDir
+                                  (DownloadInfo uri Nothing "")
+                                  (_tvVersion v)
+                                  isolateDir
+                                  forceInstall
                         pure vi
                   )
                   >>= \case
@@ -1863,8 +2208,12 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                           pure ExitSuccess
                         VLeft (V (AlreadyInstalled _ v)) -> do
                           runLogger $ logWarn $
-                            "Stack ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup rm stack " <> prettyVer v <> "' first"
+                            "Stack ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install stack --force " <> prettyVer v <> "'"
                           pure ExitSuccess
+                        VLeft (V (FileAlreadyExistsError fp)) -> do
+                          runLogger $ logWarn $
+                            "File " <> T.pack fp <> " already exists. Use 'ghcup install stack --isolate " <> T.pack fp <> " --force ..." <> "' if you want to overwrite."
+                          pure $ ExitFailure 3
                         VLeft e -> do
                           runLogger $ do
                             logError $ T.pack $ prettyShow e
@@ -2032,10 +2381,31 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
             Set (Left (SetHLS sopts)) -> setHLS' sopts
             Set (Left (SetStack sopts)) -> setStack' sopts
 
+            UnSet (UnsetGHC (UnsetOptions triple)) -> runUnsetGHC (unsetGHC triple)
+                  >>= \case
+                        VRight _ -> do
+                          runLogger $ logInfo "GHC successfully unset"
+                          pure ExitSuccess
+                        VLeft  e -> do
+                          runLogger $ logError $ T.pack $ prettyShow e
+                          pure $ ExitFailure 14
+            UnSet (UnsetCabal (UnsetOptions _)) -> do
+              runAppState unsetCabal
+              runLogger $ logInfo "Cabal successfully unset"
+              pure ExitSuccess
+            UnSet (UnsetHLS (UnsetOptions _)) -> do
+              runAppState unsetHLS
+              runLogger $ logInfo "HLS successfully unset"
+              pure ExitSuccess
+            UnSet (UnsetStack (UnsetOptions _)) -> do
+              runAppState unsetStack
+              runLogger $ logInfo "Stack successfully unset"
+              pure ExitSuccess
+
             List ListOptions {..} ->
               runListGHC (do
                   l <- listVersions loTool lCriteria
-                  liftIO $ printListResult lRawFormat l
+                  liftIO $ printListResult no_color lRawFormat l
                   pure ExitSuccess
                 )
 
@@ -2057,6 +2427,53 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                         runLogger $ logError $ T.pack $ prettyShow e
                         pure $ ExitFailure 8
 
+            Compile (CompileHLS HLSCompileOptions { .. }) -> do
+              runCompileHLS (do
+                case targetHLS of
+                  Left targetVer -> do
+                    GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
+                    let vi = getVersionInfo targetVer HLS dls
+                    forM_ (_viPreCompile =<< vi) $ \msg -> do
+                      lift $ logInfo msg
+                      lift $ logInfo
+                        "...waiting for 5 seconds, you can still abort..."
+                      liftIO $ threadDelay 5000000 -- for compilation, give the user a sec to intervene
+                  Right _ -> pure ()
+                ghcs <- liftE $ forM targetGHCs (\ghc -> fmap (_tvVersion . fst) . fromVersion (Just ghc) $ GHC)
+                targetVer <- liftE $ compileHLS
+                            targetHLS
+                            ghcs
+                            jobs
+                            ovewrwiteVer
+                            isolateDir
+                            cabalProject
+                            cabalProjectLocal
+                            patchDir
+                GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
+                let vi = getVersionInfo targetVer HLS dls
+                when setCompile $ void $ liftE $
+                  setHLS targetVer
+                pure (vi, targetVer)
+                )
+                >>= \case
+                      VRight (vi, tv) -> do
+                        runLogger $ logInfo
+                          "HLS successfully compiled and installed"
+                        forM_ (_viPostInstall =<< vi) $ \msg ->
+                          runLogger $ logInfo msg
+                        putStr (T.unpack $ prettyVer tv)
+                        pure ExitSuccess
+                      VLeft err@(V (BuildFailed tmpdir _)) -> do
+                        case keepDirs settings of
+                          Never -> runLogger $ logError $ T.pack $ prettyShow err
+                          _ -> runLogger $ (logError $ T.pack (prettyShow err) <> "\n" <>
+                                "Check the logs at " <> T.pack logsDir <> " and the build directory "
+                                <> T.pack tmpdir <> " for more clues." <> "\n" <>
+                                "Make sure to clean up " <> T.pack tmpdir <> " afterwards.")
+                        pure $ ExitFailure 9
+                      VLeft e -> do
+                        runLogger $ logError $ T.pack $ prettyShow e
+                        pure $ ExitFailure 9
             Compile (CompileGHC GHCCompileOptions { hadrian = True, crossTarget = Just _ }) -> do
               runLogger $ logError "Hadrian cross compile support is not yet implemented!"
               pure $ ExitFailure 9
@@ -2099,8 +2516,12 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                         pure ExitSuccess
                       VLeft (V (AlreadyInstalled _ v)) -> do
                         runLogger $ logWarn $
-                          "GHC ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup rm ghc " <> prettyVer v <> "' first"
+                          "GHC ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install ghc --force " <> prettyVer v <> "'"
                         pure ExitSuccess
+                      VLeft (V (DirNotEmpty fp)) -> do
+                        runLogger $ logWarn $
+                          "Install directory " <> T.pack fp <> " is not empty. Use 'ghcup install ghc --isolate " <> T.pack fp <> " --force ..." <> "' to install regardless."
+                        pure $ ExitFailure 3
                       VLeft err@(V (BuildFailed tmpdir _)) -> do
                         case keepDirs settings of
                           Never -> runLogger $ logError $ T.pack $ prettyShow err
@@ -2339,6 +2760,20 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                             VLeft e -> do
                               runLogger $ logError $ T.pack $ prettyShow e
                               pure $ ExitFailure 15
+            GC GCOptions{..} ->
+              runGC (do
+                  when gcOldGHC rmOldGHC
+                  lift $ when gcProfilingLibs rmProfilingLibs
+                  lift $ when gcShareDir rmShareDir
+                  lift $ when gcHLSNoGHC rmHLSNoGHC
+                  lift $ when gcCache rmCache
+                  lift $ when gcTmp rmTmp
+                   ) >>= \case
+                            VRight _ -> do
+                                  pure ExitSuccess
+                            VLeft e -> do
+                              runLogger $ logError $ T.pack $ prettyShow e
+                              pure $ ExitFailure 27
 
 
           case res of
@@ -2389,13 +2824,15 @@ fromVersion' SetRecommended tool = do
 fromVersion' (SetToolVersion v) tool = do
   GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
   let vi = getVersionInfo (_tvVersion v) tool dls
-  case pvp $ prettyVer (_tvVersion v) of
+  case pvp $ prettyVer (_tvVersion v) of -- need to be strict here
     Left _ -> pure (v, vi)
-    Right (PVP (major' :|[minor'])) ->
-      case getLatestGHCFor (fromIntegral major') (fromIntegral minor') dls of
-        Just (v', vi') -> pure (GHCTargetVersion (_tvTarget v) v', Just vi')
+    Right pvpIn ->
+      lift (getLatestToolFor tool pvpIn dls) >>= \case
+        Just (pvp_, vi') -> do
+          v' <- lift $ pvpToVersion pvp_
+          when (v' /= (_tvVersion v)) $ lift $ logWarn ("Assuming you meant version " <> prettyVer v')
+          pure (GHCTargetVersion (_tvTarget v) v', Just vi')
         Nothing -> pure (v, vi)
-    Right _ -> pure (v, vi)
 fromVersion' (SetToolTag Latest) tool = do
   GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
   (\(x, y) -> (mkTVer x, Just y)) <$> getLatest dls tool ?? TagNotFound Latest tool
@@ -2455,9 +2892,8 @@ fromVersion' (SetToolTag t') tool =
   throwE $ TagNotFound t' tool
 
 
-printListResult :: Bool -> [ListResult] -> IO ()
-printListResult raw lr = do
-  no_color <- isJust <$> lookupEnv "NO_COLOR"
+printListResult :: Bool -> Bool -> [ListResult] -> IO ()
+printListResult no_color raw lr = do
 
   let
     color | raw || no_color = flip const

cabal.ghc8107.project

@@ -8,16 +8,6 @@ package ghcup
     tests: True
     flags: +tui
 
-source-repository-package
-    type: git
-    location: https://github.com/bgamari/terminal-size
-    tag: 34ea816bd63f75f800eedac12c6908c6f3736036
-
-source-repository-package
-    type: git
-    location: https://github.com/hasufell/libarchive
-    tag: 8587aab78dd515928024ecd82c8f215e06db85cd
-
 constraints: http-io-streams -brotli
 
 package libarchive

cabal.ghc8107.project.freeze

@@ -1,7 +1,8 @@
 active-repositories: hackage.haskell.org:merge
-constraints: any.Cabal ==3.2.1.0,
+constraints: any.Cabal ==3.2.1.0 || ==3.6.1.0,
+             Cabal -bundled-binary-generic,
              any.HUnit ==1.6.2.0,
-             any.HsOpenSSL ==0.11.7.1,
+             any.HsOpenSSL ==0.11.7.2,
              HsOpenSSL -fast-bignum -homebrew-openssl -macports-openssl -use-pkg-config,
              any.HsYAML ==0.2.1.0,
              HsYAML -exe,
@@ -26,16 +27,16 @@ constraints: any.Cabal ==3.2.1.0,
              any.attoparsec ==0.13.2.5,
              attoparsec -developer,
              any.base ==4.14.3.0,
-             any.base-compat ==0.11.2,
-             any.base-compat-batteries ==0.11.2,
-             any.base-orphans ==0.8.4,
+             any.base-compat ==0.12.0,
+             any.base-compat-batteries ==0.12.0,
+             any.base-orphans ==0.8.5,
              any.base16-bytestring ==1.0.1.0,
              any.base64-bytestring ==1.1.0.0,
              any.bifunctors ==5.5.11,
              bifunctors +semigroups +tagged,
              any.binary ==0.8.8.0,
              any.blaze-builder ==0.4.2.1,
-             any.brick ==0.64,
+             any.brick ==0.64.1,
              brick -demos,
              any.bytestring ==0.10.12.0,
              any.bz2 ==1.0.1.0,
@@ -47,7 +48,7 @@ constraints: any.Cabal ==3.2.1.0,
              any.call-stack ==0.4.0,
              any.case-insensitive ==1.2.1.0,
              any.casing ==0.1.4.1,
-             any.chs-cabal ==0.1.1.0,
+             any.chs-cabal ==0.1.1.1,
              any.chs-deps ==0.1.0.0,
              chs-deps -cross,
              any.clock ==0.8.2,
@@ -57,7 +58,6 @@ constraints: any.Cabal ==3.2.1.0,
              comonad +containers +distributive +indexed-traversable,
              any.composition-prelude ==3.0.0.2,
              composition-prelude -development,
-             any.concurrent-output ==1.10.12,
              any.config-ini ==0.2.4.0,
              config-ini -enable-doctests,
              any.containers ==0.6.5.1,
@@ -94,7 +94,7 @@ constraints: any.Cabal ==3.2.1.0,
              hsc2hs -in-ghc-tree,
              any.hspec ==2.7.10,
              any.hspec-core ==2.7.10,
-             any.hspec-discover ==2.7.10 || ==2.8.3,
+             any.hspec-discover ==2.7.10,
              any.hspec-expectations ==0.8.2,
              any.hspec-golden-aeson ==0.9.0.0,
              any.http-io-streams ==0.1.6.0,
@@ -109,7 +109,7 @@ constraints: any.Cabal ==3.2.1.0,
              io-streams +network -nointeractivetests +zlib,
              any.language-c ==0.9.0.1,
              language-c -allwarnings +iecfpextension +usebytestrings,
-             any.libarchive ==3.0.2.2,
+             any.libarchive ==3.0.3.0,
              libarchive -cross -low-memory -system-libarchive,
              any.lzma-static ==5.2.5.4,
              any.megaparsec ==9.0.1,
@@ -143,7 +143,7 @@ constraints: any.Cabal ==3.2.1.0,
              any.profunctors ==5.6.2,
              any.quickcheck-arbitrary-adt ==0.3.1.0,
              any.quickcheck-io ==0.2.0,
-             any.random ==1.2.0,
+             any.random ==1.2.1,
              any.recursion-schemes ==5.2.2.1,
              recursion-schemes +template-haskell,
              any.regex-base ==0.94.0.1,
@@ -175,14 +175,14 @@ constraints: any.Cabal ==3.2.1.0,
              any.text ==1.2.4.1,
              any.text-zipper ==0.11,
              any.tf-random ==0.5,
-             any.th-abstraction ==0.4.2.0,
-             any.th-compat ==0.1.2,
+             any.th-abstraction ==0.4.3.0,
+             any.th-compat ==0.1.3,
              any.th-lift ==0.8.2,
              any.th-lift-instances ==0.1.18,
              any.these ==1.1.1.1,
              these +assoc,
              any.time ==1.9.3,
-             any.time-compat ==1.9.6,
+             any.time-compat ==1.9.6.1,
              time-compat -old-locale,
              any.transformers ==0.5.6.2,
              any.transformers-base ==0.4.6,
@@ -200,14 +200,14 @@ constraints: any.Cabal ==3.2.1.0,
              uri-bytestring -lib-werror,
              any.utf8-string ==1.0.2,
              any.uuid-types ==1.0.5,
-             any.vector ==0.12.3.0,
+             any.vector ==0.12.3.1,
              vector +boundschecks -internalchecks -unsafechecks -wall,
              any.versions ==5.0.0,
              any.vty ==5.33,
-             any.word-wrap ==0.4.1,
+             any.word-wrap ==0.5,
              any.word8 ==0.1.3,
              any.xor ==0.0.1.0,
              any.zlib ==0.6.2.3,
              zlib -bundled-c-zlib -non-blocking-ffi -pkg-config,
              any.zlib-bindings ==0.1.1.5
-index-state: hackage.haskell.org 2021-08-29T16:24:29Z
+index-state: hackage.haskell.org 2021-10-01T15:16:26Z

cabal.ghc901.project

@@ -8,16 +8,6 @@ package ghcup
     tests: True
     flags: +tui
 
-source-repository-package
-    type: git
-    location: https://github.com/bgamari/terminal-size
-    tag: 34ea816bd63f75f800eedac12c6908c6f3736036
-
-source-repository-package
-    type: git
-    location: https://github.com/hasufell/libarchive
-    tag: 8587aab78dd515928024ecd82c8f215e06db85cd
-
 constraints: http-io-streams -brotli
 
 package libarchive

cabal.ghc901.project.freeze

@@ -1,7 +1,8 @@
 active-repositories: hackage.haskell.org:merge
-constraints: any.Cabal ==3.4.0.0,
+constraints: any.Cabal ==3.4.0.0 || ==3.6.1.0,
+             Cabal -bundled-binary-generic,
              any.HUnit ==1.6.2.0,
-             any.HsOpenSSL ==0.11.7.1,
+             any.HsOpenSSL ==0.11.7.2,
              HsOpenSSL -fast-bignum -homebrew-openssl -macports-openssl -use-pkg-config,
              any.HsYAML ==0.2.1.0,
              HsYAML -exe,
@@ -26,16 +27,16 @@ constraints: any.Cabal ==3.4.0.0,
              any.attoparsec ==0.13.2.5,
              attoparsec -developer,
              any.base ==4.15.0.0,
-             any.base-compat ==0.11.2,
-             any.base-compat-batteries ==0.11.2,
-             any.base-orphans ==0.8.4,
+             any.base-compat ==0.12.0,
+             any.base-compat-batteries ==0.12.0,
+             any.base-orphans ==0.8.5,
              any.base16-bytestring ==1.0.1.0,
              any.base64-bytestring ==1.1.0.0,
              any.bifunctors ==5.5.11,
              bifunctors +semigroups +tagged,
              any.binary ==0.8.8.0,
              any.blaze-builder ==0.4.2.1,
-             any.brick ==0.64,
+             any.brick ==0.64.1,
              brick -demos,
              any.bytestring ==0.10.12.1,
              any.bz2 ==1.0.1.0,
@@ -47,7 +48,7 @@ constraints: any.Cabal ==3.4.0.0,
              any.call-stack ==0.4.0,
              any.case-insensitive ==1.2.1.0,
              any.casing ==0.1.4.1,
-             any.chs-cabal ==0.1.1.0,
+             any.chs-cabal ==0.1.1.1,
              any.chs-deps ==0.1.0.0,
              chs-deps -cross,
              any.clock ==0.8.2,
@@ -57,7 +58,6 @@ constraints: any.Cabal ==3.4.0.0,
              comonad +containers +distributive +indexed-traversable,
              any.composition-prelude ==3.0.0.2,
              composition-prelude -development,
-             any.concurrent-output ==1.10.12,
              any.config-ini ==0.2.4.0,
              config-ini -enable-doctests,
              any.containers ==0.6.4.1,
@@ -95,7 +95,7 @@ constraints: any.Cabal ==3.4.0.0,
              hsc2hs -in-ghc-tree,
              any.hspec ==2.7.10,
              any.hspec-core ==2.7.10,
-             any.hspec-discover ==2.7.10 || ==2.8.3,
+             any.hspec-discover ==2.7.10,
              any.hspec-expectations ==0.8.2,
              any.hspec-golden-aeson ==0.9.0.0,
              any.http-io-streams ==0.1.6.0,
@@ -109,7 +109,7 @@ constraints: any.Cabal ==3.4.0.0,
              io-streams +network -nointeractivetests +zlib,
              any.language-c ==0.9.0.1,
              language-c -allwarnings +iecfpextension +usebytestrings,
-             any.libarchive ==3.0.2.2,
+             any.libarchive ==3.0.3.0,
              libarchive -cross -low-memory -system-libarchive,
              any.lzma-static ==5.2.5.4,
              any.megaparsec ==9.0.1,
@@ -143,7 +143,7 @@ constraints: any.Cabal ==3.4.0.0,
              any.profunctors ==5.6.2,
              any.quickcheck-arbitrary-adt ==0.3.1.0,
              any.quickcheck-io ==0.2.0,
-             any.random ==1.2.0,
+             any.random ==1.2.1,
              any.recursion-schemes ==5.2.2.1,
              recursion-schemes +template-haskell,
              any.regex-base ==0.94.0.1,
@@ -175,14 +175,14 @@ constraints: any.Cabal ==3.4.0.0,
              any.text ==1.2.4.1,
              any.text-zipper ==0.11,
              any.tf-random ==0.5,
-             any.th-abstraction ==0.4.2.0,
-             any.th-compat ==0.1.2,
+             any.th-abstraction ==0.4.3.0,
+             any.th-compat ==0.1.3,
              any.th-lift ==0.8.2,
              any.th-lift-instances ==0.1.18,
              any.these ==1.1.1.1,
              these +assoc,
              any.time ==1.9.3,
-             any.time-compat ==1.9.6,
+             any.time-compat ==1.9.6.1,
              time-compat -old-locale,
              any.transformers ==0.5.6.2,
              any.transformers-base ==0.4.6,
@@ -200,14 +200,14 @@ constraints: any.Cabal ==3.4.0.0,
              uri-bytestring -lib-werror,
              any.utf8-string ==1.0.2,
              any.uuid-types ==1.0.5,
-             any.vector ==0.12.3.0,
+             any.vector ==0.12.3.1,
              vector +boundschecks -internalchecks -unsafechecks -wall,
              any.versions ==5.0.0,
              any.vty ==5.33,
-             any.word-wrap ==0.4.1,
+             any.word-wrap ==0.5,
              any.word8 ==0.1.3,
              any.xor ==0.0.1.0,
              any.zlib ==0.6.2.3,
              zlib -bundled-c-zlib -non-blocking-ffi -pkg-config,
              any.zlib-bindings ==0.1.1.5
-index-state: hackage.haskell.org 2021-08-29T16:24:29Z
+index-state: hackage.haskell.org 2021-10-01T15:16:26Z

cabal.project

@@ -8,17 +8,19 @@ package ghcup
     tests: True
     flags: +tui
 
-source-repository-package
-    type: git
-    location: https://github.com/bgamari/terminal-size
-    tag: 34ea816bd63f75f800eedac12c6908c6f3736036
+constraints: http-io-streams -brotli,
+             any.Cabal ==3.4.0.0 || ==3.6.2.0,
+             any.aeson >= 2.0.1.0
 
 source-repository-package
     type: git
-    location: https://github.com/hasufell/libarchive
-    tag: 8587aab78dd515928024ecd82c8f215e06db85cd
+    location: https://github.com/hasufell/aeson-pretty.git
+    tag: e902ab866bb41d990b66af3644aeb352ff7aaf6f
 
-constraints: http-io-streams -brotli
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/HsYAML-aeson.git
+    tag: b4b4ab8592918b52a9f2e5bb0c5a795b9721b4f3
 
 package libarchive
   flags: -system-libarchive
@@ -29,4 +31,7 @@ package aeson-pretty
 package cabal-plan
   flags: -exe
 
+package aeson
+  flags: +ordered-keymap
+
 allow-newer: base, ghc-prim, template-haskell, language-c

data/config.yaml

@@ -8,6 +8,10 @@ verbose: False
 keep-dirs: Errors  # Always | Never | Errors
 # Which downloader to use
 downloader: Curl   # Curl | Wget | Internal
+# whether to run in offline mode
+no-network: False
+# whether/how to do gpg verification
+gpg-setting: GPGNone # GPGStrict | GPGLax | GPGNone
 
 # TUI key bindings,
 # see https://hackage.haskell.org/package/vty-5.31/docs/Graphics-Vty-Input-Events.html#t:Key

data/metadata/ghcup-0.0.6.yaml

@@ -72,7 +72,6 @@ toolRequirements:
         '( >= 7 && < 8 )':
           distroPKGs:
           - gcc
-          - gcc-c++
           - gmp
           - gmp-devel
           - make
@@ -83,7 +82,6 @@ toolRequirements:
         unknown_versioning:
           distroPKGs:
           - gcc
-          - gcc-c++
           - gmp
           - gmp-devel
           - make
@@ -96,7 +94,6 @@ toolRequirements:
         unknown_versioning:
           distroPKGs:
           - gcc
-          - gcc-c++
           - gmp
           - gmp-devel
           - make
@@ -111,14 +108,15 @@ toolRequirements:
           - binutils-gold
           - curl
           - gcc
-          - g++
           - gmp-dev
-          - ncurses-dev
+          - libc-dev
           - libffi-dev
           - make
-          - xz
-          - tar
+          - musl-dev
+          - ncurses-dev
           - perl
+          - tar
+          - xz
           notes: ''
       Linux_UnknownLinux:
         unknown_versioning:
@@ -1495,6 +1493,7 @@ ghcupDownloads:
               dlHash: b823b58cae36fbac0741680ca7605180fa4cf4c6ae439123d282184b94d32fd6
     8.10.4:
       viTags:
+      - old
       - base-4.14.1.0
       viChangeLog: https://downloads.haskell.org/~ghc/8.10.4/docs/html/users_guide/8.10.4-notes.html
       viSourceDL:
@@ -1590,6 +1589,7 @@ ghcupDownloads:
               dlHash: 0d18ef83593272f6196a41cc3abdc48dfe5e14372db75d71ea19fe35320c4e81
     8.10.5:
       viTags:
+      - old
       - base-4.14.2.0
       viChangeLog: https://downloads.haskell.org/~ghc/8.10.5/docs/html/users_guide/8.10.5-notes.html
       viSourceDL:
@@ -1598,6 +1598,11 @@ ghcupDownloads:
         dlHash: f10941f16e4fbd98580ab5241b9271bb0851304560c4d5ca127e3b0e20e3076f
       viPostRemove: *ghc-post-remove
       viPreCompile: *ghc-pre-compile
+      viPostInstall: &ghc-8105-post-install |
+        GHC 8.10.5 and 8.10.6 have several issues on Darwin, e.g.
+          https://gitlab.haskell.org/ghc/ghc/-/issues/19950
+        Consider upgrading to 8.10.7 via
+          ghcup install ghc --set 8.10.7
       viArch:
         A_64:
           Linux_Debian:
@@ -1690,6 +1695,7 @@ ghcupDownloads:
               dlHash: 56170d1a8450e18b7eb9c23c94723da352815b27ec250bb23742a62f16dcab6c
     8.10.6:
       viTags:
+      - old
       - base-4.14.3.0
       viChangeLog: https://downloads.haskell.org/~ghc/8.10.6/docs/html/users_guide/8.10.6-notes.html
       viSourceDL:
@@ -1698,6 +1704,7 @@ ghcupDownloads:
         dlHash: 43afba72a533408b42c1492bd047b5e37e5f7204e41a5cedd3182cc841610ce9
       viPostRemove: *ghc-post-remove
       viPreCompile: *ghc-pre-compile
+      viPostInstall: *ghc-8105-post-install
       viArch:
         A_64:
           Linux_Debian:
@@ -2053,6 +2060,11 @@ ghcupDownloads:
               dlUri: https://downloads.haskell.org/~ghc/9.2.1-rc1/ghc-9.2.0.20210821-aarch64-deb10-linux.tar.xz
               dlSubdir: ghc-9.2.0.20210821
               dlHash: 289fc361be4a3199ac15449e30405a9831454811dd454e81eab73bfcdd2c4088
+          Darwin:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~ghc/9.2.1-rc1/ghc-9.2.0.20210821-aarch64-apple-darwin.tar.xz
+              dlSubdir: ghc-9.2.0.20210821-aarch64-apple-darwin
+              dlHash: 0d763fb619cfa32fa37c113c446e13bebc2215db5946e5fa8fd8400559cf4152
         A_ARM:
           Linux_UnknownLinux:
             unknown_versioning:
@@ -2171,7 +2183,7 @@ ghcupDownloads:
               dlHash: 2b3ac28549916de5f3379241797eaf60e84b6c001f2abbe73d9fadbbaf768e93
     3.4.0.0:
       viTags:
-      - Recommended
+        - old
       viChangeLog: https://github.com/haskell/cabal/blob/master/release-notes/cabal-install-3.4.0.0.md
       viArch:
         A_64:
@@ -2220,9 +2232,58 @@ ghcupDownloads:
             unknown_versioning:
               dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.4.0.0/cabal-install-3.4.0.0-armv7-linux-bootstrapped.tar.xz
               dlHash: 16c0d1eaba24bed14f3e152970179a45d9f9bb5cc839b2c210ad06eb7d4826ed
+    3.4.1.0:
+      viTags:
+        - Recommended
+      viChangeLog: https://github.com/haskell/cabal/blob/master/release-notes/cabal-install-3.4.1.0.md
+      viArch:
+        A_64:
+          Linux_UnknownLinux:
+            unknown_versioning: &cabal-3410-64
+              dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.4.1.0/cabal-install-3.4.1.0-x86_64-linux-alpine-static.tar.xz
+              dlHash: f8cae8b5e6346b56676f734de1afd9b4b5f27eab6ab87852c19a30f7850f17fe
+          Linux_Alpine:
+            unknown_versioning: *cabal-3410-64
+          Darwin:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.1.0/cabal-install-3.4.1.0-x86_64-darwin.tar.xz
+              dlHash: c45f9503a60cb580c0ef13c7d9c0069fb953ee4c173835454d1e8f708ed2b574
+          FreeBSD:
+            '( >= 12 && < 13 )':
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.1.0/cabal-install-3.4.1.0-x86_64-freebsd12.tar.xz
+              dlHash: 54563fb7624d871dec0d852c156f4826e31078def99d376bbebb4d066d3aa7ae
+            '( >= 13 )':
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.1.0/cabal-install-3.4.1.0-x86_64-freebsd13.tar.xz
+              dlHash: 3cc9e9a8f9dadcb97b777907bb884042edc5a2f89c81a782b086554a48852506
+          Windows:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.1.0/cabal-install-3.4.1.0-x86_64-windows.zip
+              dlSubdir:
+              dlHash: b86761a55a0899e33b6e9b64c75a52b33716430de93ea47bfd07d8f11417e800
+        A_32:
+          Linux_UnknownLinux:
+            unknown_versioning: &cabal-3410-32
+              dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.4.1.0/cabal-install-3.4.1.0-i386-linux-alpine.tar.xz
+              dlHash: 7622c64b9382443a43494a992c836654d6554110acf34a4331271e1b438e2ab8
+          Linux_Alpine:
+            unknown_versioning: *cabal-3410-32
+        A_ARM64:
+          Linux_UnknownLinux:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.1.0/cabal-install-3.4.1.0-aarch64-linux-deb10.tar.xz
+              dlHash: 67a7d253e2f4069d47c321fb1b72ca8156e7387a05801417569b95c2654e18ce
+          Darwin:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.4.1.0/cabal-install-3.4.1.0-aarch64-darwin.tar.xz
+              dlHash: f1fb07f1e385ef12d6c3a26ee6caa5223463b095373f1ea1ef74ab5922b0302f
+        A_ARM:
+          Linux_UnknownLinux:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.4.1.0/cabal-install-3.4.1.0-armv7-linux-deb10.tar.xz
+              dlHash: 7c5b75ded319629ff47b17dd283b90ad1ba2635cf65c1a0d2b5be9610e843968
     3.6.0.0:
       viTags:
-      - Latest
+        - old
       viChangeLog: https://github.com/haskell/cabal/blob/master/release-notes/cabal-install-3.6.0.0.md
       viArch:
         A_64:
@@ -2250,6 +2311,13 @@ ghcupDownloads:
               dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.6.0.0/cabal-install-3.6.0.0-x86_64-windows.zip
               dlSubdir:
               dlHash: 8222b49b6eac3d06aaa390bc688f467e8f949a38943567f46246f8320fd72ded
+        A_32:
+          Linux_UnknownLinux:
+            unknown_versioning: &cabal-3600-32
+              dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.6.0.0/cabal-install-3.6.0.0-i386-linux.tar.gz
+              dlHash: f2fcef4a212906379a255e12c853f1d015fa22c867764bd7f6e09c6f656b3c75
+          Linux_Alpine:
+            unknown_versioning: *cabal-3600-32
         A_ARM64:
           Linux_UnknownLinux:
             unknown_versioning:
@@ -2264,8 +2332,57 @@ ghcupDownloads:
             unknown_versioning:
               dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.6.0.0/cabal-install-3.6.0.0-armv7-linux.tar.xz
               dlHash: 11b5ca042a8bf45971224f2127a3e9d6b803f09210042ca80a254bea06f01a2e
+    3.6.2.0:
+      viTags:
+        - Latest
+      viChangeLog: https://github.com/haskell/cabal/blob/master/release-notes/cabal-install-3.6.2.0.md
+      viArch:
+        A_64:
+          Linux_UnknownLinux:
+            unknown_versioning: &cabal-3620-32
+              dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.6.2.0/cabal-install-3.6.2.0-x86_64-linux-alpine-static.tar.xz
+              dlHash: 7810d31f35ca7649355647abc6406ad2a3696648ce848e49409e86bd70f6a2c6
+          Linux_Alpine:
+            unknown_versioning: *cabal-3620-32
+          Darwin:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.6.2.0/cabal-install-3.6.2.0-x86_64-darwin.tar.xz
+              dlHash: d616284712f052e599cf1940b10fa2dca4fc6ae1308c32db03f5bd2c23eb2419
+          FreeBSD:
+            '( >= 12 && < 13 )':
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.6.2.0/cabal-install-3.6.2.0-x86_64-freebsd12.tar.xz
+              dlHash: eaabbc6f6f4782ad21f8df95d1902eb29b66d8fafe6c8278aaa3d48da772aecb
+            '( >= 13 )':
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.6.2.0/cabal-install-3.6.2.0-x86_64-freebsd13.tar.xz
+              dlHash: b22965d2cc70061e6efb3b4a0e901906c83fb448810e79aca97b9e61bce22692
+          Windows:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.6.2.0/cabal-install-3.6.2.0-x86_64-windows.zip
+              dlSubdir:
+              dlHash: 89aa3aa3f76d15182c0d03227639890cd537627ba0bf0ef9ab451fee504b24c6
+        A_32:
+          Linux_UnknownLinux:
+            unknown_versioning: &cabal-3620-32
+              dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.6.2.0/cabal-install-3.6.2.0-i386-linux-alpine.tar.xz
+              dlHash: 902b15de4ec5935474c62a72b373a76f727684449d7425996f0ad067a5481bd0
+          Linux_Alpine:
+            unknown_versioning: *cabal-3620-32
+        A_ARM64:
+          Linux_UnknownLinux:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.6.2.0/cabal-install-3.6.2.0-aarch64-linux-deb10.tar.xz
+              dlHash: d9acee67d4308bc5c22d27bee034d388cc4192a25deff9e7e491e2396572b030
+          Darwin:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~cabal/cabal-install-3.6.2.0/cabal-install-3.6.2.0-aarch64-darwin.tar.xz
+              dlHash: 859c526cde4498879a935e38422d3a0b70ae012dff034913331be8dd429a4a74
+        A_ARM:
+          Linux_UnknownLinux:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.6.2.0/cabal-install-3.6.2.0-armv7-linux-deb10.tar.xz
+              dlHash: 694ba7c14f8d720c6e790ab0488dbff2d8a07d9c6de97b4deeba31088f825bc2
   GHCup:
-    0.1.16.2:
+    0.1.17.2:
       viTags:
       - Recommended
       - Latest
@@ -2275,46 +2392,50 @@ ghcupDownloads:
         A_64:
           Linux_UnknownLinux:
             unknown_versioning: &ghcup-64
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/x86_64-linux-ghcup-0.1.16.2
-              dlHash: d5e43b95ce1d42263376e414f7eb7c5dd440271c7c6cd9bad446fdeff3823893
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/x86_64-linux-ghcup-0.1.17.2
+              dlHash: e9adb022b9bcfe501caca39e76ae7241af0f30fbb466a2202837a7a578607daf
           Darwin:
             unknown_versioning:
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/x86_64-apple-darwin-ghcup-0.1.16.2
-              dlHash: a334620ccce7705211b2142882dde544003e6030af4b91a44c890542a90f879f
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/x86_64-apple-darwin-ghcup-0.1.17.2
+              dlHash: 9418dab0f603b25f925739d66ca2328e876ce5197c131d7e75060f8edf7c57c9
           FreeBSD:
-            unknown_versioning:
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/x86_64-portbld-freebsd-ghcup-0.1.16.2
-              dlHash: 92359592a5694375e53b22628920086bf4bbf0faff5be018a0ed3e745a6426a9
+            '( >= 12 && < 13 )':
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/x86_64-portbld-freebsd12-ghcup-0.1.17.2
+              dlHash: b6f0558e66f95a0772a60902c2c96202d0271d8d963db436a1359f1c4e1d2947
+            '( >= 13 )':
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/x86_64-portbld-freebsd13-ghcup-0.1.17.2
+              dlHash: 5bd5760dd29117ca2797a87b79f99b804743e7e64fcdcfe6ad6436314423ef84
           Windows:
             unknown_versioning:
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/x86_64-mingw64-ghcup-0.1.16.2.exe
-              dlHash: ec78872a84213968c490675127b9aad2285980b747c68207801ae824b98c7948
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/x86_64-mingw64-ghcup-0.1.17.2.exe
+              dlHash: 17ab704551c691067d590760c513891d0d0d375efb59dc3c99219fdf352fed71
           Linux_Alpine:
             unknown_versioning: *ghcup-64
         A_32:
           Linux_UnknownLinux:
             unknown_versioning: &ghcup-32
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/i386-linux-ghcup-0.1.16.2
-              dlHash: 01968ca6decac7b6e8ba6e2c817870d3fa47289a6507e0c1ab563f7b6eec0e38
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/i386-linux-ghcup-0.1.17.2
+              dlHash: eb29a33ed9798c94ed05b10c66c2cd6690a4d5aa79ed7ce6a9b8564e0c095ff4
           Linux_Alpine:
             unknown_versioning: *ghcup-32
         A_ARM64:
           Linux_UnknownLinux:
             unknown_versioning:
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/aarch64-linux-ghcup-0.1.16.2
-              dlHash: 0bdbfc724e0ddabb266156eea83c2c4e19c6ed79dd06db0c29b7d69df8d9fa8c
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/aarch64-linux-ghcup-0.1.17.2
+              dlHash: ad72641877f91f1cc5142151dafad68566f439114f96a738837ed549430173a5
           Darwin:
             unknown_versioning:
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/aarch64-apple-darwin-ghcup-0.1.16.2
-              dlHash: 8854e991a2ba1350abda59dab96ce50ae7729d1ce99399d67929ef31e90f1da5
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/aarch64-apple-darwin-ghcup-0.1.17.2
+              dlHash: bf8691a88627b02253c2068537dc16e7eb1d3dbb22bcb1342cb7f0d00df08fd5
         A_ARM:
           Linux_UnknownLinux:
             unknown_versioning:
-              dlUri: https://downloads.haskell.org/~ghcup/0.1.16.2/armv7-linux-ghcup-0.1.16.2
-              dlHash: 983ebb5b584bfa600704216a63f94b40d36a02573834e90ef1042c8472d9ad57
+              dlUri: https://downloads.haskell.org/~ghcup/0.1.17.2/armv7-linux-ghcup-0.1.17.2
+              dlHash: 03f2f8aaa8393372e9f7e16061703eda3f497b9604171825995389f3d5cc8f8f
   HLS:
     1.1.0:
-      viTags: []
+      viTags:
+        - old
       viChangeLog: https://github.com/haskell/haskell-language-server/blob/master/ChangeLog.md#110
       viPostInstall: &hls-post-install |
         This is just the server part of your LSP configuration. Consult the README on how to
@@ -2337,7 +2458,8 @@ ghcupDownloads:
           Linux_Alpine:
             unknown_versioning: *hls-110-64
     1.2.0:
-      viTags: []
+      viTags:
+        - old
       viChangeLog: https://github.com/haskell/haskell-language-server/blob/master/ChangeLog.md#120
       viPostInstall: *hls-post-install
       viArch:
@@ -2357,9 +2479,7 @@ ghcupDownloads:
           Linux_Alpine:
             unknown_versioning: *hls-120-64
     1.3.0:
-      viTags:
-        - Recommended
-        - Latest
+      viTags: []
       viChangeLog: https://github.com/haskell/haskell-language-server/blob/master/ChangeLog.md#130
       viPostInstall: *hls-post-install
       viArch:
@@ -2378,6 +2498,50 @@ ghcupDownloads:
               dlHash: 46aac7be888e29a9907cf56698c1ce1475c148b5e6cc099513e9ef74a0520dcf
           Linux_Alpine:
             unknown_versioning: *hls-130-64
+    1.4.0:
+      viTags:
+        - Recommended
+        - Latest
+      viChangeLog: https://github.com/haskell/haskell-language-server/blob/master/ChangeLog.md#140
+      viPostInstall: *hls-post-install
+      viSourceDL:
+        dlUri: https://downloads.haskell.org/ghcup/src/haskell-language-server/1.4.0/haskell-language-server-1.4.0.tar.gz
+        dlSubdir: haskell-language-server-1.4.0
+        dlHash: c5d7dbf7fae9aa3ed2c1184b49e82d8ac623ca786494ef6602cfe11735d28db0
+      viArch:
+        A_64:
+          Linux_UnknownLinux:
+            unknown_versioning: &hls-140-64
+              dlUri: https://github.com/haskell/haskell-language-server/releases/download/1.4.0/haskell-language-server-Linux-1.4.0.tar.gz
+              dlHash: f93c114441911ccce55649702adc9553cb4c9f953c37878321d2806a3525fee8
+          Darwin:
+            unknown_versioning:
+              dlUri: https://github.com/haskell/haskell-language-server/releases/download/1.4.0/haskell-language-server-macOS-1.4.0.tar.gz
+              dlHash: a7f0ac6be93ffb08cc239e5f5fead99b061061825f99566c1be33ee60cab62a4
+          FreeBSD:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/haskell-language-server/1.4.0/haskell-language-server-freebsd-1.4.0.tar.gz
+              dlHash: 6b2ad2398ed8c3964dea017e3d5e553b54c10ba1373d7653d2edd019854f4da2
+          Windows:
+            unknown_versioning:
+              dlUri: https://github.com/haskell/haskell-language-server/releases/download/1.4.0/haskell-language-server-Windows-1.4.0.tar.gz
+              dlHash: 0ec77cee750037b7a0ede817b46a913a702821f4098c6a858bcb686cb30f7efd
+          Linux_Alpine:
+            unknown_versioning: *hls-140-64
+        A_ARM64:
+          Linux_UnknownLinux:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/haskell-language-server/1.4.0/haskell-language-server-linux-aarch64-1.4.0.tar.gz
+              dlHash: 8ad97e2bf1c538e637edec194e1cd9939019955bb749cb470f34bbe5a067b001
+          Darwin:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/haskell-language-server/1.4.0/haskell-language-server-macOS-aarch64-1.4.0.tar.gz
+              dlHash: 70c6fe38e987ba44c1e19173486c01f666ffb30a74cd5a7968296a5aba4c2dd0
+        A_ARM:
+          Linux_UnknownLinux:
+            unknown_versioning:
+              dlUri: https://downloads.haskell.org/ghcup/unofficial-bindists/haskell-language-server/1.4.0/haskell-language-server-linux-armv7-1.4.0.tar.gz
+              dlHash: 4a921fbca06b02f3b1c0930cec5e65e9362b603e7715680ec7b150f18bd703d6
   Stack:
     2.5.1:
       viTags:

docs/BUGS.md

@@ -0,0 +1 @@
+# Known BUGS

docs/Discord-Logo-Black.svg

@@ -0,0 +1,10 @@
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docs/HACKING.md

@@ -1,75 +0,0 @@
-# HACKING
-
-## Design decisions
-
-### Using [Excepts](https://hackage.haskell.org/package/haskus-utils-variant-3.0/docs/Haskus-Utils-Variant-Excepts.html) as a beefed up ExceptT
-
-This is an open variant, similar to [plucky](https://hackage.haskell.org/package/plucky) or [oops](https://github.com/i-am-tom/oops) and allows us to combine different error types. Maybe it is too much and it's a little bit [unergonomic](https://github.com/haskus/packages/issues/32) at times. If it really hurts maintenance, it will be removed. It was more of an experiment.
-
-### No use of haskell-TLS
-
-I consider haskell-TLS an interesting experiment, but not a battle-tested and peer-reviewed crypto implementation. There is little to no research about what the intricacies of using haskell for low-level crypto are and how vulnerable such binaries are. Instead, we use either curl the binary (for FreeBSD and mac) or http-io-streams, which works with OpenSSL bindings.
-
-### Optics instead of lens
-
-They're a little safer (less Monoid weirdness with view) and have better error messages. Consider the following wit lens
-
-```
-> view (_Just . to (++ "abc")) Nothing
-""
-```
-
-vs optics
-
-```
-> view (_Just % to (++ "abc")) Nothing
-
-<interactive>:2:1: error:
-    • An_AffineFold cannot be used as A_Getter
-    • In the expression: view (_Just % to (++ "abc")) Nothing
-      In an equation for ‘it’: it = view (_Just % to (++ "abc")) Nothing
-```
-
-### Strict and StrictData on by default
-
-Kazu Yamamoto [explained it in his PR](https://github.com/yesodweb/wai/pull/752#issuecomment-501531386) very well. I like to agree with him. The instances where we need non-strict behavior, we annotate it.
-
-## Code style and formatting
-
-1. Brittany
-2. mtl-style preferred
-3. no overly pointfree style
-
-## Code structure
-
-Main functionality is in `GHCup` module. Utility functions are
-organised tree-ish in `GHCup.Utils` and `GHCup.Utils.*`.
-
-Anything dealing with ghcup specific directories is in
-`GHCup.Utils.Dirs`.
-
-Download information on where to fetch bindists from is in the appropriate
-yaml files: `ghcup-<yaml-ver>.yaml`.
-
-## Common Tasks
-
-### Adding a new GHC version
-
-1. open the latest `ghcup-<yaml-ver>.yaml`
-2. find the latest ghc version (in yaml tree e.g. `ghcupDownloads -> GHC -> 8.10.3`)
-3. copy-paste it
-4. adjust the version, tags, changelog, source url
-5. adjust the various bindist urls (make sure to also change the yaml anchors)
-6. run `cabal run exe:ghcup-gen -- check-tarballs -f ghcup-<yaml-ver>.yaml -u 'ghc-8\.10\.4'`
-
-## Major refactors
-
-1. First major refactor included adding cross support. This added
-   `GHCTargetVersion`, which includes the target in addition to the version.
-   Most of the `Version` parameters to functions had to be replaced with
-   that and ensured the logic is consistent for cross and non-cross
-   installs.
-2. This refactor added windows support wrt [#130](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/130).
-   The major changes here were switching `hpath` library out for `filepath`/`directory` (sadly) and
-   introducing a non-unix way of handling processes via the `process` library. It also introduced considerable
-   amounts of CPP wrt file handling, installation etc.

docs/Matrix_logo.svg

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg version="1.1" viewBox="0 0 75 32" xmlns="http://www.w3.org/2000/svg" xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+<title>Matrix (protocol) logo</title>
+ <g fill="#040404">
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docs/Octicons-bug.svg

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docs/RELEASING.md

@@ -1,21 +0,0 @@
-# RELEASING
-
-1. Update version in `ghcup.cabal` and `boostrap-haskell` (`ghver` variable at the top of the script)
-
-2. Update `GHCup.Version` module. `ghcupURL` must only be updated if we change the `GHCupInfo` type or the YAML representation of it. The version of the YAML represents the change increments. `ghcUpVer` is the current application version, read from `ghcup.cabal`.
-
-3. Add ChangeLog entry
-
-4. Add/fix downloads in `ghcup-<ver>.yaml` (under `data/metadata`), then verify with `ghcup-gen check -f ghcup-<ver>.yaml` and possibly (example only) `ghcup-gen check-tarballs -f ghcup-<ver>.yaml -u 'ghc-8.10.7'`. Generally, new GHC/cabal/stack/hls versions are only added to the latest yaml file. New GHCup versions are added to all (great care must be taken here to not break the parser... e.g. ARM platforms don't parse in all older formats).
-
-5. Commit and git push with tag. Wait for tests to succeed and release artifacts to build.
-
-6. Download release artifacts and upload them `downloads.haskell.org/ghcup` along with checksum files (`sha256sum --tag * > SHA256SUMS && gpg --detach-sign -u <your-email> SHA256SUMS`)
-
-7. Add ghcup release artifacts to ALL yaml files (see point 4.)
-
-8. Upload the final `ghcup-<ver>.yaml` to `webhost.haskell.org/ghcup/data/`.
-
-9. Update `bootstrap-haskell` and `bootstrap-haskell.ps1` to `webhost.haskell.org/ghcup/sh/`
-
-10. Update the ghcup symlinks at `downloads.haskell.org/ghcup`

docs/about.md

@@ -0,0 +1,222 @@
+# About
+
+All you wanted to know about GHCup.
+
+## Team
+
+### Author and Maintainer
+
+* [Julian Ospald](https://github.com/hasufell) (aka: maerwald, hasufell)
+
+### Collaborators
+
+* [Arjun Kathuria](https://github.com/arjunkathuria)
+* [Ben Gamari](https://github.com/bgamari)
+* [Javier Neira](https://github.com/jneira)
+
+### Contributors
+
+* amesgen
+* Chris Smith
+* Anton-Latukha
+* Brian McKenna
+* Huw campbell
+* Tom Ellis
+* Sigmund Vestergaard
+* Ron Toland
+* Paolo Martini
+* Mario Lang
+* Jan Hrček
+* vglfr
+* Fendor
+* Enrico Maria De Angelis
+* Emily Pillmore
+* Colin Barrett
+* Artur Gajowy
+
+### Sponsors
+
+* All [opencollective](https://opencollective.com/ghcup#category-CONTRIBUTE) contributors
+* [haskell.org](https://www.haskell.org/haskell-org-committee/) via CI and infrastructure
+* [Haskell Foundation](https://haskell.foundation/affiliates/) via affiliation
+
+## How to help
+
+* if you want to contribute code or documentation, check out the [issue tracker](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues) and the [Development guide](./dev.md)
+* if you want to propose features or write user feedback, feel free to [open a ticket](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/new?issue)
+* if you want to donate to the project, visit our [opencollective](https://opencollective.com/ghcup#category-CONTRIBUTE) page
+
+## Design goals
+
+1. simplicity
+2. non-interactive CLI interface
+3. portable
+4. do one thing and do it well (UNIX philosophy)
+
+## Non-goals
+
+1. invoking `sudo`, `apt-get` or *any* package manager
+2. handling system packages
+3. handling cabal projects
+4. being a stack alternative
+
+## How
+
+Installs a specified GHC version into `~/.ghcup/ghc/<ver>`, and places `ghc-<ver>` symlinks in `~/.ghcup/bin/`.
+
+Optionally, an unversioned `ghc` link can point to a default version of your choice.
+
+This uses precompiled GHC binaries that have been compiled on fedora/debian by [upstream GHC](https://www.haskell.org/ghc/download_ghc_8_6_1.html#binaries).
+
+Alternatively, you can also tell it to compile from source (note that this might fail due to missing requirements).
+
+cabal-install/HLS/stack are installed in `~/.ghcup/bin/<tool>-<ver>` and have unversioned symlinks to the latest version by default (`~/.ghcup/bin/<tool>-<ver>`).
+
+## Known users
+
+* Github actions:
+	- [actions/virtual-environments](https://github.com/actions/virtual-environments)
+	- [haskell/actions/setup](https://github.com/haskell/actions/tree/main/setup)
+* mirrors:
+	- [sjtug](https://mirror.sjtu.edu.cn/docs/ghcup)
+* tools:
+	- [vabal](https://github.com/Franciman/vabal)
+
+## Known problems
+
+### Custom ghc version names
+
+When installing ghc bindists with custom version names as outlined in
+[installing custom bindists](#installing-custom-bindists), then cabal might
+be unable to find the correct `ghc-pkg` (also see [#73](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/73))
+if you use `cabal build --with-compiler=ghc-foo`. Instead, point it to the full path, such as:
+`cabal build --with-compiler=$HOME/.ghcup/ghc/<version-name>/bin/ghc` or set that GHC version
+as the current one via: `ghcup set ghc <version-name>`.
+
+This problem doesn't exist for regularly installed GHC versions.
+
+### Limited distributions supported
+
+Currently only GNU/Linux distributions compatible with the [upstream GHC](https://www.haskell.org/ghc/download_ghc_8_6_1.html#binaries) binaries are supported.
+
+### Precompiled binaries
+
+Since this uses precompiled binaries you may run into
+several problems.
+
+#### Missing libtinfo (ncurses)
+
+You may run into problems with *ncurses* and **missing libtinfo**, in case
+your distribution doesn't use the legacy way of building
+ncurses and has no compatibility symlinks in place.
+
+Ask your distributor on how to solve this or
+try to compile from source via `ghcup compile <version>`.
+
+#### Libnuma required
+
+This was a [bug](https://ghc.haskell.org/trac/ghc/ticket/15688) in the build system of some GHC versions that lead to
+unconditionally enabled libnuma support. To mitigate this you might have to install the libnuma
+package of your distribution. See [here](https://gitlab.haskell.org/haskell/ghcup/issues/58) for a discussion.
+
+### Compilation
+
+Although this script can compile GHC for you, it's just a very thin
+wrapper around the build system. It makes no effort in trying
+to figure out whether you have the correct toolchain and
+the correct dependencies. Refer to [the official docs](https://ghc.haskell.org/trac/ghc/wiki/Building/Preparation/Linux)
+on how to prepare your environment for building GHC.
+
+### Stack support
+
+There may be a number of bugs when trying to make ghcup installed GHC versions work with stack,
+such as:
+
+- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/188
+
+Further, stack's upgrade procedure may break/confuse ghcup. There are a number of integration
+issues discussed here:
+
+- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/153
+
+### Windows support
+
+Windows support is in early stages. Since windows doesn't support symbolic links properly,
+ghcup uses a [shimgen wrapper](https://github.com/71/scoop-better-shimexe). It seems to work
+well, but there may be unknown issues with that approach.
+
+Windows 7 and Powershell 2.0 aren't well supported at the moment, also see:
+
+- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/140
+- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/197
+
+## FAQ
+
+### Why reimplement stack?
+
+GHCup is not a reimplementation of stack. The only common part is automatic installation of GHC,
+but even that differs in scope and design.
+
+### Why should I use ghcup over stack?
+
+GHCup is not a replacement for stack. Instead, it supports installing and managing stack versions.
+It does the same for cabal, GHC and HLS. As such, It doesn't make a workflow choice for you.
+
+### Why should I let ghcup manage stack?
+
+You don't need to. However, some users seem to prefer to have a central tool that manages cabal and stack
+at the same time. Additionally, it can allow better sharing of GHC installation across these tools.
+Also see:
+
+* https://docs.haskellstack.org/en/stable/yaml_configuration/#system-ghc
+* https://github.com/commercialhaskell/stack/pull/5585
+
+### Why does ghcup not use stack code?
+
+1. GHCup started as a shell script. At the time of rewriting it in Haskell, the authors didn't even know that stack exposes *some* of its [installation API](https://hackage.haskell.org/package/stack-2.5.1.1/docs/Stack-Setup.html)
+2. it doesn't support cabal installation, which was the main motivation behind GHCup back then
+3. depending on a codebase as big as stack for a central part of one's application without having a short contribution pipeline would likely have caused stagnation or resulted in simply copy-pasting the relevant code in order to adjust it
+4. it's not clear how GHCup would have been implemented with the provided API. It seems the codebases are fairly different. GHCup does a lot of symlink handling to expose a central `bin/` directory that users can easily put in PATH, without having to worry about anything more. It also provides explicit removal functionality, GHC cross-compilation, a TUI, etc etc.
+
+### Why not unify...
+
+#### ...stack and Cabal and do away with standalone installers
+
+GHCup is not involved in such decisions. cabal-install and stack might have a
+sufficiently different user experience to warrant having a choice.
+
+#### ...installer implementations and have a common library
+
+This sounds like an interesting goal. However, GHC installation isn't a hard engineering problem
+and the shared code wouldn't be too exciting. For such an effort to make sense, all involved
+parties would need to collaborate and have a short pipeline to get patches in.
+
+It's true this would solve the integration problem, but following unix principles, we can
+do similar via **hooks**. Both cabal and stack can support installation hooks. These hooks
+can then call into ghcup or anything else, also see:
+
+* https://github.com/haskell/cabal/issues/7394
+* https://github.com/commercialhaskell/stack/pull/5585
+
+#### ...installers (like, all of it)
+
+So far, there hasn't been an open discussion about this. Is this even a good idea?
+Sometimes projects converge eventually if their overlap is big enough, sometimes they don't.
+
+While unification sounds like a simplification of the ecosystem, it also takes away choice.
+Take `curl` and `wget` as an example.
+
+### Why not support windows?
+
+Windows is supported since GHCup version 0.1.15.1.
+
+### Why the haskell reimplementation?
+
+GHCup started as a portable posix shell script of maybe 50 LOC. GHC installation itself can be carried out in
+about ~3 lines of shell code (download, unpack , configure+make install). However, much convenient functionality
+has been added since, as well as ensuring that all operations are safe and correct. The shell script ended up with
+over 2k LOC, which was very hard to maintain.
+
+The main concern when switching from a portable shell script to haskell was platform/architecture support.
+However, ghcup now re-uses GHCs CI infrastructure and as such is perfectly in sync with all platforms that
+GHC supports.

docs/css/extra.css

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+  --link-pink: #9E358F;
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+
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+}
+
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+  min-width: 110px;
+  max-width: 120px;
+  border: none;
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+
+.index-ghcup-hero h1 {
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+
+div.col-md-9 h1:first-of-type {
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+  font-size: 60px;
+  font-weight: 300;
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+div.col-md-9>p:first-of-type {
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+div.col-md-9 p.admonition-title:first-of-type {
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+div.col-md-9 h1:first-of-type .headerlink {
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+
+code.no-highlight {
+  color: black;
+}
+
+div.gh-badge img {
+  margin: 0;
+  padding: 0;
+  height: 25px;
+}
+
+/* Definition List styles */
+
+dd {
+  padding-left: 20px;
+}
+
+/* Homepage */
+
+body.homepage div.jumbotron {
+  margin-top: 1.5rem;
+  padding-top: 1rem;
+  padding-bottom: 0;
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+
+body.homepage div.jumbotron div.card {
+  margin-bottom: 2rem;
+}
+
+body.homepage>div.container div.col-md-3 {
+  display: none;
+}
+
+body.homepage>div.container div.col-md-9 {
+  /* margin-left: 0; */
+  /* padding-left: 0; */
+  flex: 0 0 100%;
+  max-width: 100%;
+}
+
+.center {
+  display: block !important;
+}
+
+.bg-primary {
+  background-image: none;
+  background-color: var(--theme-purple) !important;
+}
+
+body .bg-primary {
+  background-image: none;
+  background-color: var(--theme-purple);
+  border: 0px;
+}
+
+body .btn-primary {
+  background-image: none;
+  background-color: var(--theme-purple);
+  border: 1px solid var(--theme-purple);
+}
+
+.navbar.fixed-top {
+  background-image: none;
+  background-color: var(--theme-purple);
+  border-bottom: 5px solid rgba(69, 59, 97, 0.5);
+  padding: 0px;
+}
+
+.btn-primary:hover {
+  background-color: var(--theme-purple);
+  border: 1px solid var(--theme-purple);
+}
+
+a {
+  color: var(--link-pink);
+}
+
+a:hover {
+  color: #996FC2;
+}
+
+.col-md-9 img.main-logo {
+  border: 0px; 
+  padding: 0px;
+  margin: 0px;
+}
+
+.ghcup-intro {
+  text-align: center;
+}
+
+.main-buttons {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  justify-content: center;
+}
+
+.main-buttons a {
+  margin-right: 5px;
+  margin-bottom: 5px;
+}
+
+.command-button {
+  display: flex;
+  align-items: center;
+}
+
+.command-button > pre {
+  flex: 0 1 80%;
+  margin: 0;
+  padding: 10px;
+  text-align: center;
+  background-color: #515151;
+  color: white;
+  border-radius: 3px;
+  box-shadow: inset 0px 0px 20px 0px #333333;
+  font-size: 1em;
+  white-space: nowrap;
+  overflow: auto;
+}
+
+.ghcup-command:before {
+  color: #999;
+  content: " $ ";
+  margin-left: 15px;
+}
+
+div.command-button {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.command-button pre {
+
+}
+
+div.command-button button {
+  color: #515151;
+  background: rgb(230, 230, 230);
+  border: 1px solid grey;
+  margin: 0 0 0 10px;
+  padding: 10px;
+  flex-basis: 0 0 20%;
+}
+
+div.command-button button .fa {
+  font-size: x-large;
+}
+
+div.command-button button:hover {
+  background: rgb(220, 220, 220);
+  color: black;
+  border: 1px solid black;
+}
+
+div.command-button button:focus {
+  background-color: #04aa6d;
+}
+
+footer > hr {
+  border-top: 0.5px solid #CCC;
+}
+
+.qi-container {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  box-sizing: border-box;
+  padding: 0.75rem;
+  background-color: rgb(250, 250, 250);
+  margin-top: 2rem;
+  margin-bottom: 2rem;
+  margin-left: auto;
+  margin-right: auto;
+  border-radius: 3px;
+  border: 1px solid rgb(204, 204, 204);
+  box-shadow:
+    4px 8px 10px -6px rgb(204, 204, 204),
+    4px 8px 10px -6px rgb(153, 111, 194);
+}
+
+@media only screen and (max-width:1000px) {
+  .qi-container {
+    box-shadow:
+      4px 10px 10px -6px rgb(204, 204, 204),
+      4px 10px 10px -9px rgb(153, 111, 194);
+  }
+}
+
+.index-cta-donate .donate-button a {
+  position: absolute;
+  top:0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+}
+
+.index-cta-donate .donate-button {
+  margin: 10px auto;
+  position: relative;
+  display: block;
+  background: none;
+  padding: none;
+  border: none;
+  background: url("https://opencollective.com/webpack/donate/button@2x.png?color=blue");
+  width: 35%;
+  min-width: 240px;
+  max-width: 280px;
+  height: 40px;
+  background-size: contain;
+  background-repeat: no-repeat;
+}
+
+.ghcup-os-container {
+  width: 100%;
+  margin: 10px 0;
+}
+.ghcup-os-container > * {
+  text-align: center;
+}
+
+/* fix list overflows (esp about page) */
+ul > li {
+  overflow-wrap: anywhere;
+}
+
+
+.footer {
+  color: grey;
+  font-size: 0.7em;
+  margin-top: 1rem;
+  margin-bottom: 1rem;
+}
+
+.footer div.show-all-platforms {
+  display: inline-block;
+}
+
+#help, #collective {
+  display: block;
+  text-align: center;
+}
+
+#help img {
+  border: none;
+  margin: 0px;
+  height: 24px;
+}
+
+.ghcup-help {
+  margin: 10px auto;
+  padding: 10px 0;
+  box-sizing: border-box;
+}
+
+#collective img {
+  border: none;
+  margin: 0px;
+}
+
+#collective {
+  margin-top: 10px;
+}
+

docs/dev.md

@@ -0,0 +1,120 @@
+# Development
+
+All you wanted to know about GHCup development.
+
+## Module graph
+
+[![Module graph](./modules_small.svg){: .center style="width:900px"}](./modules_wide.svg)
+
+Main functionality is in `GHCup` module. Utility functions are
+organised tree-ish in `GHCup.Utils` and `GHCup.Utils.*`.
+
+Anything dealing with ghcup specific directories is in
+`GHCup.Utils.Dirs`.
+
+Download information on where to fetch bindists from is in the appropriate
+yaml files: `data/metadata/ghcup-<yaml-ver>.yaml`.
+
+## Design decisions
+
+### Using [Excepts](https://hackage.haskell.org/package/haskus-utils-variant-3.0/docs/Haskus-Utils-Variant-Excepts.html) as a beefed up ExceptT
+
+This is an open variant, similar to [plucky](https://hackage.haskell.org/package/plucky) or [oops](https://github.com/i-am-tom/oops) and allows us to combine different error types. Maybe it is too much and it's a little bit [unergonomic](https://github.com/haskus/packages/issues/32) at times. If it really hurts maintenance, it will be removed. It was more of an experiment.
+
+### No use of haskell-TLS
+
+I consider haskell-TLS an interesting experiment, but not a battle-tested and peer-reviewed crypto implementation. There is little to no research about what the intricacies of using haskell for low-level crypto are and how vulnerable such binaries are. Instead, we use either curl the binary or wget. There's also an implementation based on OpenSSL bindings, but it isn't enabled by default, since it would complicate shipping static binaries.
+
+### Optics instead of lens
+
+They're a little safer (less Monoid weirdness with view) and have better error messages. Consider the following with [lens](https://hackage.haskell.org/package/lens):
+
+```
+> view (_Just . to (++ "abc")) Nothing
+""
+```
+
+vs [optics](https://hackage.haskell.org/package/optics):
+
+```
+> view (_Just % to (++ "abc")) Nothing
+
+<interactive>:2:1: error:
+    • An_AffineFold cannot be used as A_Getter
+    • In the expression: view (_Just % to (++ "abc")) Nothing
+      In an equation for ‘it’: it = view (_Just % to (++ "abc")) Nothing
+```
+
+### StrictData on by default
+
+Kazu Yamamoto [explained it in his PR](https://github.com/yesodweb/wai/pull/752#issuecomment-501531386) very well. I like to agree with him. The instances where we need non-strict behavior, we annotate it.
+
+`Strict` is a little more odd as a default, since it depends on how you define your functions as well.
+
+## Code style and formatting
+
+Unfortunately, code formatters are semi-broken on this codebase, due to TH and CPP.
+
+Some light suggestions:
+
+1. mtl-style preferred
+2. no overly pointfree style
+3. use `where` a lot, so the main function body reads like prose
+4. documentation is part of the code
+
+## Common Tasks
+
+### Adding a new GHC version
+
+1. open the latest `data/metadata/ghcup-<yaml-ver>.yaml`
+2. find the latest ghc version (in yaml tree e.g. `ghcupDownloads -> GHC -> 8.10.7`)
+3. copy-paste it
+4. adjust the version, tags, changelog, source url
+5. adjust the various bindist urls (make sure to also change the yaml anchors)
+6. run `cabal run exe:ghcup-gen -- check          -f data/metadata/ghcup-<yaml-ver>.yaml`
+7. run `cabal run exe:ghcup-gen -- check-tarballs -f data/metadata/ghcup-<yaml-ver>.yaml -u 'ghc-8\.10\.8'`
+
+### Adding a new CLI command
+
+An example illustration on how to deal with [optparse-applicative](https://hackage.haskell.org/package/optparse-applicative) can be seen here: [https://gitlab.haskell.org/haskell/ghcup-hs/-/commit/c19dd5ee8b2edbaf0336af143f1c75b6f4843e26](https://gitlab.haskell.org/haskell/ghcup-hs/-/commit/c19dd5ee8b2edbaf0336af143f1c75b6f4843e26)
+
+## Major refactors
+
+1. First major refactor included adding cross support. This added
+   `GHCTargetVersion`, which includes the target in addition to the version.
+   Most of the `Version` parameters to functions had to be replaced with
+   that and ensured the logic is consistent for cross and non-cross
+   installs.
+2. This refactor added windows support wrt [#130](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/130).
+   The major changes here were switching `hpath` library out for `filepath`/`directory` (sadly) and
+   introducing a non-unix way of handling processes via the `process` library. It also introduced considerable
+   amounts of CPP wrt file handling, installation etc.
+
+# Releasing
+
+1. Update version in `ghcup.cabal` and `boostrap-haskell` (`ghver` variable at the top of the script)
+
+2. Update `GHCup.Version` module. `ghcupURL` must only be updated if we change the `GHCupInfo` type or the YAML representation of it. The version of the YAML represents the change increments. `ghcUpVer` is the current application version, read from `ghcup.cabal`.
+
+3. Add ChangeLog entry
+
+4. Add/fix downloads in `ghcup-<ver>.yaml` (under `data/metadata`), then verify with `ghcup-gen check -f data/metadata/ghcup-<ver>.yaml` and possibly (example only) `ghcup-gen check-tarballs -f data/metadata/ghcup-<ver>.yaml -u 'ghc-8.10.7'`. Generally, new GHC/cabal/stack/hls versions are only added to the latest yaml file. New GHCup versions are added to all (great care must be taken here to not break the parser... e.g. ARM platforms don't parse in all older formats).
+
+5. Commit and git push with tag. Wait for tests to succeed and release artifacts to build.
+
+6. Download release artifacts and upload them `downloads.haskell.org/~ghcup` along with checksum files (`sha256sum --tag * > SHA256SUMS && gpg --detach-sign -u <your-email> SHA256SUMS`)
+
+7. Add ghcup release artifacts to ALL yaml files (see point 4.)
+
+8. Upload the final `data/metadata/ghcup-<ver>.yaml` (and a detached GPG sig of it) to `webhost.haskell.org/ghcup/data/`.
+
+9. Update `bootstrap-haskell` and `bootstrap-haskell.ps1` to `webhost.haskell.org/ghcup/sh/`
+
+10. Update the top-level ghcup symlinks at `downloads.haskell.org/~ghcup`
+
+11. Post on reddit/discourse/etc. and collect rewards
+
+# Documentation
+
+This documentation page is built via [mkdocs](https://www.mkdocs.org/), see `mkdocs.yml` and `docs/` subfolder.
+The module graph needs [graphmod](https://github.com/yav/graphmod) and is generated via `scripts/dev/modgraph.sh`.

docs/expand-piece.svg

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docs/guide.md

@@ -0,0 +1,307 @@
+# User Guide
+
+`ghcup --help` is your friend.
+
+## Basic usage
+
+For the simple interactive TUI (not available on windows), run:
+
+```sh
+ghcup tui
+```
+
+For the full functionality via cli:
+
+```sh
+# list available ghc/cabal versions
+ghcup list
+
+# install the recommended GHC version
+ghcup install ghc
+
+# install a specific GHC version
+ghcup install ghc 8.2.2
+
+# set the currently "active" GHC version
+ghcup set ghc 8.4.4
+
+# install cabal-install
+ghcup install cabal
+
+# update ghcup itself
+ghcup upgrade
+```
+
+## Configuration
+
+A configuration file can be put in `~/.ghcup/config.yaml`. The default config file
+explaining all possible configurations can be found in this repo: [config.yaml](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/data/config.yaml).
+
+Partial configuration is fine. Command line options always override the config file settings.
+
+## Manpages
+
+For man pages to work you need [man-db](http://man-db.nongnu.org/) as your `man` provider, then issue `man ghc`. Manpages only work for the currently set ghc.
+`MANPATH` may be required to be unset.
+
+## Shell-completion
+
+Shell completions are in [scripts/shell-completions](https://gitlab.haskell.org/haskell/ghcup-hs/-/tree/master/scripts/shell-completions) directory of this repository.
+
+For bash: install `shell-completions/bash`
+as e.g. `/etc/bash_completion.d/ghcup` (depending on distro)
+and make sure your bashrc sources the startup script
+(`/usr/share/bash-completion/bash_completion` on some distros).
+
+## Compiling GHC from source
+
+Compiling from source is supported for both source tarballs and arbitrary git refs. See `ghcup compile ghc --help`
+for a list of all available options.
+
+If you need to overwrite the existing `build.mk`, check the default files
+in [data/build_mk](https://gitlab.haskell.org/haskell/ghcup-hs/-/tree/master/data/build_mk), copy them somewhere, adjust them and
+pass `--config path/to/build.mk` to `ghcup compile ghc`.
+Common `build.mk` options are explained [here](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/using#build-configuration).
+
+Make sure your system meets all the [prerequisites](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation).
+
+### Cross support
+
+ghcup can compile and install a cross GHC for any target. However, this
+requires that the build host has a complete cross toolchain and various
+libraries installed for the target platform.
+
+Consult the GHC documentation on the [prerequisites](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/cross-compiling#tools-to-install).
+For distributions with non-standard locations of cross toolchain and
+libraries, this may need some tweaking of `build.mk` or configure args.
+See `ghcup compile ghc --help` for further information.
+
+## XDG support
+
+To enable XDG style directories, set the environment variable `GHCUP_USE_XDG_DIRS` to anything.
+
+Then you can control the locations via XDG environment variables as such:
+
+* `XDG_DATA_HOME`: GHCs will be unpacked in `ghcup/ghc` subdir (default: `~/.local/share`)
+* `XDG_CACHE_HOME`: logs and download files will be stored in `ghcup` subdir (default: `~/.cache`)
+* `XDG_BIN_HOME`: binaries end up here (default: `~/.local/bin`)
+* `XDG_CONFIG_HOME`: the config file is stored in `ghcup` subdir as `config.yaml` (default: `~/.config`)
+
+**Note that `ghcup` makes some assumptions about structure of files in `XDG_BIN_HOME`. So if you have other tools
+installing e.g. stack/cabal/ghc into it, this will likely clash. In that case consider disabling XDG support.**
+
+## Env variables
+
+This is the complete list of env variables that change GHCup behavior:
+
+* `GHCUP_USE_XDG_DIRS`: see [XDG support](#xdg-support) above
+* `TMPDIR`: where ghcup does the work (unpacking, building, ...)
+* `GHCUP_INSTALL_BASE_PREFIX`: the base of ghcup (default: `$HOME`)
+* `GHCUP_CURL_OPTS`: additional options that can be passed to curl
+* `GHCUP_WGET_OPTS`: additional options that can be passed to wget
+* `GHCUP_GPG_OPTS`: additional options that can be passed to gpg
+* `GHCUP_SKIP_UPDATE_CHECK`: Skip the (possibly annoying) update check when you run a command
+* `CC`/`LD` etc.: full environment is passed to the build system when compiling GHC via GHCup
+
+## Installing custom bindists
+
+There are a couple of good use cases to install custom bindists:
+
+1. manually built bindists (e.g. with patches)
+    - example: `ghcup install ghc -u 'file:///home/mearwald/tmp/ghc-eff-patches/ghc-8.10.2-x86_64-deb10-linux.tar.xz' 8.10.2-eff`
+2. GHC head CI bindists
+    - example: `ghcup install ghc -u 'https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27' head`
+3. DWARF bindists
+    - example: `ghcup install ghc -u 'https://downloads.haskell.org/~ghc/8.10.2/ghc-8.10.2-x86_64-deb10-linux-dwarf.tar.xz' 8.10.2-dwarf`
+
+Since the version parser is pretty lax, `8.10.2-eff` and `head` are both valid versions
+and produce the binaries `ghc-8.10.2-eff` and `ghc-head` respectively.
+GHCup always needs to know which version the bindist corresponds to (this is not automatically
+detected).
+
+## Isolated installs
+
+Ghcup also enables you to install a tool (GHC, Cabal, HLS, Stack) at an isolated location of your choosing.
+These installs, as the name suggests, are separate from your main installs and DO NOT conflict with them.
+
+
+- No symlinks are made to these isolated installed tools, you'd have to manually point to them wherever you intend to use them.
+
+- These installs, can also NOT be deleted from ghcup, you'd have to go and manually delete these.
+
+You need to use the `--isolate` or `-i` flag followed by the directory path.
+
+Examples:
+
+1. install an isolated GHC version at location /home/user/isolated_dir/ghc/  
+    - `ghcup install ghc 8.10.5 --isolate /home/user/isolated_dir/ghc`
+
+2. isolated install Cabal at a location you desire  
+    - `ghcup install cabal --isolate /home/username/my_isolated_dir/`
+
+3. do an isolated install with a custom bindist  
+    - `ghcup install ghc --isolate /home/username/my_isolated_dir/ -u 'https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27' head`
+
+4. isolated install HLS  
+    - `ghcup install hls --isolate /home/username/dir/hls/`
+
+5. you can even compile ghc to an isolated location.  
+    - `ghcup compile ghc -j 4 -v 9.0.1 -b 8.10.5 -i /home/username/my/dir/ghc` 
+
+## Continuous integration
+
+On windows, ghcup can be installed automatically on a CI runner non-interactively like so:
+
+```ps
+Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $false,$true,$true,$false,$false,$false,$false,"C:\"
+```
+
+On linux/darwin/freebsd, run the following on your runner:
+
+```sh
+curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 sh
+```
+
+This will just install `ghcup` and on windows additionally `msys2`.
+
+For the full list of env variables and parameters to tweak the script behavior, see:
+
+* [bootstrap-haskell for linux/darwin/freebsd](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell#L7)
+* [bootstrap-haskell.ps1 for windows](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1#L17)
+
+### Example github workflow
+
+On github workflows you can use [https://github.com/haskell/actions/](https://github.com/haskell/actions/)
+
+If you want to install ghcup manually though, here's an example config:
+
+```yml
+name: Haskell CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build-cabal:
+
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        ghc: ['8.10.7', '9.0.1']
+        cabal: ['3.4.0.0']
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - if: matrix.os == 'windows-latest'
+      name: Install ghcup on windows
+      run: Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $false,$true,$true,$false,$false,$false,$false,"C:\"
+
+    - if: matrix.os == 'windows-latest'
+      name: Add ghcup to PATH
+      run: echo "/c/ghcup/bin" >> $GITHUB_PATH
+      shell: bash
+
+    - if: matrix.os != 'windows-latest'
+      name: Install ghcup on non-windows
+      run: curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 sh
+
+    - name: Install ghc/cabal
+      run: |
+        ghcup install ghc ${{ matrix.ghc }}
+        ghcup install cabal ${{ matrix.cabal }}
+      shell: bash
+
+    - name: Update cabal index
+      run: cabal update
+      shell: bash
+
+    - name: Build
+      run: cabal build --enable-tests --enable-benchmarks
+      shell: bash
+
+    - name: Run tests
+      run: cabal test
+      shell: bash
+```
+
+## GPG verification
+
+GHCup supports verifying the GPG signature of the metadata file. The metadata file then contains SHA256 hashes of all downloads, so
+this is cryptographically secure.
+
+First, obtain the gpg key:
+
+```sh
+gpg --batch --keyserver keys.openpgp.org --recv-keys 7784930957807690A66EBDBE3786C5262ECB4A3F
+```
+
+Then verify the gpg key in one of these ways:
+
+1. find out where I live and visit me to do offline key signing
+2. figure out my mobile phone number and call me to verify the fingerprint
+3. more boring: contact me on Libera IRC (`maerwald`) and verify the fingerprint
+
+Once you've verified the key, you have to figure out if you trust me.
+
+If you trust me, then you can configure gpg in `~/.ghcup/config.yaml`:
+
+```yml
+gpg-setting: GPGLax # GPGStrict | GPGLax | GPGNone
+```
+
+In `GPGStrict` mode, ghcup will fail if verification fails. In `GPGLax` mode it will just print a warning.
+You can also pass the mode via `ghcup --gpg <strict|lax|none>`.
+   
+## Tips and tricks
+
+### with_ghc wrapper (e.g. for HLS)
+
+Due to some HLS [bugs](https://github.com/mpickering/hie-bios/issues/194) it's necessary that the `ghc` in PATH
+is the one defined in `cabal.project`. With some simple shell functions, we can start our editor with the appropriate
+path prepended.
+
+For bash, in e.g. `~/.bashrc` define:
+
+```sh
+with_ghc() {
+  local np=$(ghcup --offline whereis -d ghc $1 || { ghcup --cache install ghc $1 && ghcup whereis -d ghc $1 ;})
+  if [ -e "${np}" ] ; then
+    shift
+    PATH="$np:$PATH" "$@"
+  else
+    >&2 echo "Cannot find or install GHC version $1"
+    return 1
+  fi
+}
+```
+
+For fish shell, in e.g. `~/.config/fish/config.fish` define:
+
+```fish
+function with_ghc
+  set --local np (ghcup --offline whereis -d ghc $argv[1] ; or begin ghcup --cache install ghc $argv[1] ; and ghcup whereis -d ghc $argv[1] ; end)
+  if test -e "$np"
+    PATH="$np:$PATH" $argv[2..-1]
+  else
+    echo "Cannot find or install GHC version $argv[1]" 1>&2
+    return 1
+  end
+end
+```
+
+Then start a new shell and issue:
+
+```sh
+# replace 'code' with your editor
+with_ghc 8.10.5 code path/to/haskell/source
+```
+
+Cabal and HLS will now see `8.10.5` as the primary GHC, without the need to
+run `ghcup set` all the time when switching between projects.
+

docs/index.md

@@ -0,0 +1,99 @@
+---
+hide:
+  - navigation
+  - toc
+---
+
+<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
+<script src="javascripts/extra.js"></script>
+
+
+<section class="index-ghcup-hero">
+  <img alt="haskell logo" src="./haskell_logo.png" />
+  <h1>GHCup</h1>
+</section>
+
+<p class="ghcup-intro">GHCup is an installer for the general purpose language <a href="https://www.haskell.org">Haskell</a>.</p>
+
+<div class="text-center main-buttons">
+<a href="install/" class="btn btn-primary" role="button">Getting Started</a>
+<a href="guide/" class="btn btn-primary" role="button">User Guide</a>
+</div>
+
+<section class="qi-container">
+
+    <div class="ghcup-os-container" id="ghcup-instructions-unix">
+      <h3>To install on Linux, macOS, FreeBSD or <a href="https://docs.microsoft.com/en-us/windows/wsl/"> WSL2</a></h3>
+      <p>run the following in a terminal (as a non-root user):<p>
+      <div class="command-button">
+	    <pre>
+            <span class="ghcup-command" id="ghcup-command-linux">curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span>
+          </pre>
+        <button class="btn" onclick="copyToClipboardNux()" id="ghcup-linux-button"><i class="fa fa-copy"></i></button>
+      </div>
+      <span>
+      </span>
+	<div class="footer">
+		<a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://www.haskell.org/ghcup/install/#manual-install">I don't like curl | sh</a> <div class="show-all-platforms"><b>&nbsp;&middot;&nbsp;</b> <a class="show-all-platforms-button" href="#">Show all platforms</a></div></p>
+	</div>
+    </div>
+
+    <div class="ghcup-os-container" id="ghcup-instructions-win">
+      <h3>To install on Windows</h3>
+      <p>run the following in a PowerShell session (as a non-admin user):<p>
+
+      <div class="command-button">
+	    <pre>
+          <span class="ghcup-command" id="ghcup-command-windows">Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true
+          </span>
+        </pre>
+        <button class="btn" onclick="copyToClipboardWin()" id="ghcup-windows-button"><i class="fa fa-copy"></i></button>
+      </div>
+	<div class="footer">
+		<a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://www.haskell.org/ghcup/install/#manual-install">I don't like curl | sh</a> <div class="show-all-platforms"><b>&nbsp;&middot;&nbsp;</b> <a class="show-all-platforms-button" href="#">Show all platforms</a></div></p>
+	</div>
+    </div>
+</section>
+
+<p id="help" class="ghcup-help">
+  Need help? Ask on
+  <span>
+    <a href="https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup">
+      <img src="irc.svg" alt="" />
+      IRC
+    </a>
+  </span>,
+  <span>
+    <a href="https://discord.gg/pKYf3zDQU7">
+      <img src="Discord-Logo-Black.svg" alt="" />
+      Discord
+    </a>
+  </span>,
+  <span>
+    <a href="https://app.element.io/#/room/#haskell-tooling:matrix.org">
+      <img src="Matrix_logo.svg" alt=""/>
+    </a>
+  </span>
+   or
+   <span>
+     <a href="https://gitlab.haskell.org/haskell/ghcup-hs/issues">
+       report a bug
+       <img src="Octicons-bug.svg" alt="" />
+     </a>
+   </span>
+</p>
+
+<script type="text/javascript" src="javascripts/ghcup.js"></script>
+
+
+----
+
+
+![GHCup](./ghcup.gif){: .center style="width:700px"}
+
+<section class="index-cta-donate">
+  <button class="donate-button">
+    <a href="https://opencollective.com/ghcup#category-CONTRIBUTE" class="donate-badge" />
+	</a>
+    </button>
+</section>

docs/install.md

@@ -0,0 +1,122 @@
+# Getting started
+
+GHCup makes it easy to install specific versions of GHC on GNU/Linux,
+macOS (aka Darwin), FreeBSD and Windows and can also bootstrap a fresh [Haskell developer environment](./install/#supported-tools) from scratch.
+It follows the unix UNIX philosophy of [do one thing and do it well](https://en.wikipedia.org/wiki/Unix_philosophy#Do_One_Thing_and_Do_It_Well). Similar in scope to [rustup](https://github.com/rust-lang-nursery/rustup.rs), [pyenv](https://github.com/pyenv/pyenv) and [jenv](http://www.jenv.be).
+
+## Installation
+
+The following commands will download the `ghcup` binary into `~/.ghcup/bin` (or `C:\ghcup\bin` on windows) and then
+run it to interactively install the [Haskell Toolchain](#supported-tools). These commands should be run as **non-root/non-admin
+user**.
+
+For Linux, macOS, FreeBSD or Windows Subsystem 2 for Linux, run this in a terminal:
+
+```sh
+curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh
+```
+
+For Windows, run this in a PowerShell session:
+
+```psh
+Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true
+```
+
+If you want to know what these scripts do, check out the [source code at the repository](https://gitlab.haskell.org/haskell/ghcup-hs/-/tree/master/scripts/bootstrap). Advanced users may want to perform a [manual installation](#manual-install) and GPG verify the binaries.
+
+## First steps
+
+1. To get started with creating a Haskell project, follow the [Getting Started with Haskell and Cabal](https://cabal.readthedocs.io/en/latest/getting-started.html) guide
+2. To properly learn Haskell, run through the [CIS 194 Haskell course](https://www.cis.upenn.edu/~cis194/spring13/) including exercises
+3. To learn more about Haskell Toolchain management, check out the [ghcup user guide](./guide.md)
+
+## Uninstallation
+
+On linux, just run `ghcup nuke`, then make sure any ghcup added lines in your `~/.bashrc` (or similar) are removed.
+
+On windows, double-click on the `Uninstall Haskell.ps1` PowerShell script on your Desktop.
+
+## Supported tools
+
+GHCup supports the following tools, which are also known as the **Haskell Toolchain**:
+
+1. [GHC](https://www.haskell.org/ghc/)
+2. [cabal-install](https://cabal.readthedocs.io/en/latest/)
+3. [haskell-language-server](https://haskell-language-server.readthedocs.io/en/latest/)
+4. [stack](https://docs.haskellstack.org/en/latest/README/)
+
+## Supported platforms
+
+This list may not be exhaustive and specifies support for bindists only.
+
+| Platform | Architecture | ghcup | GHC | cabal | HLS | stack | 
+| ------ | ------ | ------ | ------ | ------ | ------ | ------ |
+| Windows 7 | amd64 | ❔ | ✅ | ✅ | ✅ | ✅ |
+| Windows 10 | amd64 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| Windows Server 2016 | amd64 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| Windows Server 2019 | amd64 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| Windows Server 2022 | amd64 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| Windows WSL1 | amd64 | ❌ | ❔ | ❔ | ❔ | ❔ |
+| Windows WSL2 | amd64 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| MacOS >=10.13 | amd64 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| MacOS <10.13 | amd64 | ❌ | ❔ | ❔ | ❔ | ❔ |
+| MacOS | aarch64 | ✅ | ✅ | ✅ | ⚠️ | ❌ |
+| FreeBSD | amd64 | ✅ | ⚠️ | ✅ | ⚠️ | ❌ |
+| Linux generic | x86 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| Linux generic | amd64 | ✅ | ✅ | ✅ | ✅ | ✅ |
+| Linux generic | aarch64 | ✅ | ⚠️ | ✅ | ⚠️ | ❌ |
+| Linux generic | armv7 | ✅ | ⚠️ | ✅ | ⚠️ | ❌ |
+
+### Windows 7
+
+May or may not work, several issues:
+
+* [https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/140](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/140)
+* [https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/197](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/197)
+
+### WSL1
+
+Unsupported. GHC may or may not work. Upgrade to WSL2.
+
+### MacOS <13
+
+Not supported. Would require separate binaries, since >=13 binaries are incompatible.
+Please upgrade.
+
+### MacOS aarch64
+
+HLS bindists are still experimental. Stack is theoretically supported, but has no binaries yet.
+
+### FreeBSD
+
+Lacks some upstream bindists and may need compat libs, since most bindists are built on FreeBSD-12.
+HLS bindists are experimental.
+
+### Linux ARMv7/AARCH64
+
+Lower availability of bindists. HLS only has experimental ones. Stack not supported currently.
+
+## Manual install
+
+Download the binary for your platform at [https://downloads.haskell.org/~ghcup/](https://downloads.haskell.org/~ghcup/)
+and place it into your `PATH` anywhere.
+
+If you want to GPG verify the binaries, import the following key first: `7784930957807690A66EBDBE3786C5262ECB4A3F`.
+
+Then adjust your `PATH` in `~/.bashrc` (or similar, depending on your shell) like so:
+
+```sh
+export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$PATH"
+```
+
+## Vim integration
+
+See [ghcup.vim](https://github.com/hasufell/ghcup.vim).
+
+## Get help
+
+* [Libera IRC chat on #haskell-ghcup or #haskell](https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup)
+* [GHCup issue tracker](https://gitlab.haskell.org/haskell/ghcup-hs/issues)
+* [Matrix](https://app.element.io/#/room/#haskell-tooling:matrix.org)
+* [Discord](https://discord.gg/pKYf3zDQU7)
+

docs/irc.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   height="18.043058"
+   viewBox="0 0 18 18.043058"
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+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
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+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
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+     inkscape:cx="3.3814433"
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+     inkscape:current-layer="svg4" />
+  <path
+     class="heroicon-ui"
+     d="m 8.03,5.0375961 h 3.94 l 1.06,-4.23999995 a 1,1 0 1 1 1.94,0.47999995 l -0.94,3.76 H 17 a 1,1 0 0 1 0,2 h -3.47 l -1,3.9999999 H 15 a 1,1 0 1 1 0,2 h -2.97 l -1.06,4.25 a 1.0004624,1.0004624 0 1 1 -1.94,-0.49 l 0.94,-3.76 H 6.03 l -1.06,4.25 a 1.0004624,1.0004624 0 1 1 -1.94,-0.49 l 0.94,-3.76 H 1 a 1,1 0 0 1 0,-2 h 3.47 l 1,-3.9999999 H 3 a 1,1 0 0 1 0,-2 H 5.97 L 7.03,0.79759615 A 1,1 0 1 1 8.97,1.2775961 Z m -0.5,2 -1,3.9999999 h 3.94 l 1,-3.9999999 z"
+     id="path2" />
+</svg>

docs/javascripts/extra.js

@@ -0,0 +1,119 @@
+var platforms = ["win", "unix"];
+var platform_override = null;
+
+function detect_platform() {
+    "use strict";
+
+    if (platform_override !== null) {
+        return "unknown";
+    }
+
+    var os = "unknown";
+
+    if (navigator.platform == "Linux x86_64")         {os = "unix";}
+    if (navigator.platform == "Linux i686")           {os = "unix";}
+    if (navigator.platform == "Linux i686 on x86_64") {os = "unix";}
+    if (navigator.platform == "Linux aarch64")        {os = "unix";}
+    if (navigator.platform == "Linux armv6l")         {os = "unix";}
+    if (navigator.platform == "Linux armv7l")         {os = "unix";}
+    if (navigator.platform == "Linux armv8l")         {os = "unix";}
+    if (navigator.platform == "Linux ppc64")          {os = "unix";}
+    if (navigator.platform == "Linux mips")           {os = "unix";}
+    if (navigator.platform == "Linux mips64")         {os = "unix";}
+    if (navigator.platform == "Mac")                  {os = "unix";}
+    if (navigator.platform == "Win32")                {os = "win";}
+    if (navigator.platform == "Win64" ||
+        navigator.userAgent.indexOf("WOW64") != -1 ||
+        navigator.userAgent.indexOf("Win64") != -1)   {os = "win";}
+    if (navigator.platform == "FreeBSD x86_64")       {os = "unix";}
+    if (navigator.platform == "FreeBSD amd64")        {os = "unix";}
+    // if (navigator.platform == "NetBSD x86_64") {os = "unix";}
+    // if (navigator.platform == "NetBSD amd64") {os = "unix";}
+
+    // I wish I knew by now, but I don't. Try harder.
+    if (os == "unknown") {
+        if (navigator.appVersion.indexOf("Win")!=-1)     {os = "win";}
+        if (navigator.appVersion.indexOf("Mac")!=-1)     {os = "unix";}
+        if (navigator.appVersion.indexOf("FreeBSD")!=-1) {os = "unix";}
+    }
+
+    // Firefox Quantum likes to hide platform and appVersion but oscpu works
+    if (navigator.oscpu) {
+        if (navigator.oscpu.indexOf("Win32")!=-1)   {os = "win";}
+        if (navigator.oscpu.indexOf("Win64")!=-1)   {os = "win";}
+        if (navigator.oscpu.indexOf("Mac")!=-1)     {os = "unix";}
+        if (navigator.oscpu.indexOf("Linux")!=-1)   {os = "unix";}
+        if (navigator.oscpu.indexOf("FreeBSD")!=-1) {os = "unix";}
+        // if (navigator.oscpu.indexOf("NetBSD")!=-1) {os = "unix";}
+    }
+
+    return os;
+}
+
+function adjust_for_platform() {
+    "use strict";
+
+    var platform = detect_platform();
+
+	if (platforms.includes(platform)) {
+		platforms.forEach(function (platform_elem) {
+			var platform_div = document.getElementById("ghcup-instructions-" + platform_elem);
+			platform_div.style.display = "none";
+			if (platform == platform_elem) {
+				platform_div.style.display = "block";
+			}
+		});
+	}
+}
+
+
+function show_all_platforms() {
+	platforms.forEach(function (platform_elem) {
+		var platform_div = document.getElementById("ghcup-instructions-" + platform_elem);
+		platform_div.style.display = "block";
+	});
+	
+	var buttons = document.getElementsByClassName("show-all-platforms");
+	console.log(buttons);
+	Array.from(buttons).forEach(function (button) {
+		button.style.display = "none";
+	});
+
+}
+
+function set_up_default_platform_buttons() {
+    var defaults_buttons = document.getElementsByClassName('show-all-platforms-button');
+    for (var i = 0; i < defaults_buttons.length; i++) {
+        defaults_buttons[i].onclick = show_all_platforms;
+    }
+}
+
+function copyToClipboardNux() {
+  const text = document.getElementById("ghcup-command-linux").innerText;
+  const el = document.createElement('textarea');
+  el.value = text;
+  document.body.appendChild(el);
+  el.select();
+  document.execCommand('copy');
+  document.body.removeChild(el);
+  const button = document.getElementById("ghcup-linux-button");
+  button.focus();
+}
+
+function copyToClipboardWin() {
+  const text = document.getElementById("ghcup-command-windows").innerText;
+  const el = document.createElement('textarea');
+  el.value = text;
+  document.body.appendChild(el);
+  el.select();
+  document.execCommand('copy');
+  document.body.removeChild(el);
+  const button = document.getElementById("ghcup-windows-button");
+  button.focus();
+}
+
+(function () {
+    adjust_for_platform();
+    set_up_default_platform_buttons();
+}());
+

docs/modules_small.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by graphviz version 2.44.0 (0)
+ -->
+<!-- Title: G Pages: 1 -->
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+ viewBox="0.00 0.00 719.28 648.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(0.81 0.81) rotate(0) translate(4 794.2)">
+<title>G</title>
+<polygon fill="white" stroke="transparent" points="-4,4 -4,-794.2 882,-794.2 882,4 -4,4"/>
+<g id="clust1" class="cluster">
+<title>cluster_0</title>
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+<text text-anchor="middle" x="439" y="-645.17" font-family="Times-Roman" font-size="14.00">GHCup</text>
+</g>
+<g id="clust2" class="cluster">
+<title>cluster_1</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="190,-364.88 190,-541.72 450,-541.72 450,-364.88 190,-364.88"/>
+<text text-anchor="middle" x="320" y="-526.52" font-family="Times-Roman" font-size="14.00">Download</text>
+</g>
+<g id="clust3" class="cluster">
+<title>cluster_2</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="271,-191.39 271,-355.93 452,-355.93 452,-191.39 271,-191.39"/>
+<text text-anchor="middle" x="361.5" y="-340.73" font-family="Times-Roman" font-size="14.00">Types</text>
+</g>
+<g id="clust4" class="cluster">
+<title>cluster_3</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="566,-17.91 566,-576.42 862,-576.42 862,-17.91 566,-17.91"/>
+<text text-anchor="middle" x="714" y="-561.22" font-family="Times-Roman" font-size="14.00">Utils</text>
+</g>
+<g id="clust5" class="cluster">
+<title>cluster_4</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="640,-271.98 640,-448.82 758,-448.82 758,-271.98 640,-271.98"/>
+<text text-anchor="middle" x="699" y="-433.62" font-family="Times-Roman" font-size="14.00">File</text>
+</g>
+<g id="clust6" class="cluster">
+<title>cluster_5</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="583,-26.86 583,-110.81 653,-110.81 653,-26.86 583,-26.86"/>
+<text text-anchor="middle" x="618" y="-95.61" font-family="Times-Roman" font-size="14.00">String</text>
+</g>
+<g id="clust7" class="cluster">
+<title>cluster_6</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="712,-457.78 712,-541.72 782,-541.72 782,-457.78 712,-457.78"/>
+<text text-anchor="middle" x="747" y="-526.52" font-family="Times-Roman" font-size="14.00">Version</text>
+</g>
+<!-- u1 -->
+<g id="node1" class="node">
+<title>u1</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="2" cx="387" cy="-486.95" rx="55.49" ry="18"/>
+<text text-anchor="middle" x="387" y="-483.25" font-family="Times-Roman" font-size="14.00">Download</text>
+</g>
+<!-- u12 -->
+<g id="node7" class="node">
+<title>u12</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="2" cx="688" cy="-393.95" rx="27" ry="18"/>
+<text text-anchor="middle" x="688" y="-390.25" font-family="Times-Roman" font-size="14.00">File</text>
+</g>
+<!-- u1&#45;&gt;u12 -->
+<g id="edge15" class="edge">
+<title>u1&#45;&gt;u12</title>
+<path fill="none" stroke="black" d="M416.08,-471.48C425.43,-467.42 435.96,-463.44 446,-460.95 491.68,-449.63 616.67,-467.2 657,-442.95 665.62,-437.77 672.27,-429.17 677.16,-420.67"/>
+<polygon fill="black" stroke="black" points="680.34,-422.15 681.79,-411.65 674.11,-418.95 680.34,-422.15"/>
+</g>
+<!-- u11 -->
+<g id="node15" class="node">
+<title>u11</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="603" cy="-393.95" rx="28.7" ry="18"/>
+<text text-anchor="middle" x="603" y="-390.25" font-family="Times-Roman" font-size="14.00">Dirs</text>
+</g>
+<!-- u1&#45;&gt;u11 -->
+<g id="edge14" class="edge">
+<title>u1&#45;&gt;u11</title>
+<path fill="none" stroke="black" d="M419.14,-472.31C427.86,-468.62 437.29,-464.63 446,-460.95 489.08,-442.77 538.85,-421.87 570.6,-408.54"/>
+<polygon fill="black" stroke="black" points="571.98,-411.76 579.85,-404.66 569.27,-405.3 571.98,-411.76"/>
+</g>
+<!-- u13 -->
+<g id="node18" class="node">
+<title>u13</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="109" cy="-300.95" rx="44.39" ry="18"/>
+<text text-anchor="middle" x="109" y="-297.25" font-family="Times-Roman" font-size="14.00">Version</text>
+</g>
+<!-- u1&#45;&gt;u13 -->
+<g id="edge13" class="edge">
+<title>u1&#45;&gt;u13</title>
+<path fill="none" stroke="black" d="M356.68,-471.88C346.23,-467.63 334.3,-463.44 323,-460.95 290.82,-453.87 49.58,-466.95 27,-442.95 4.16,-418.68 12.6,-398.02 27,-367.95 36.61,-347.88 55.63,-331.97 72.94,-320.81"/>
+<polygon fill="black" stroke="black" points="75.07,-323.61 81.77,-315.4 71.41,-317.64 75.07,-323.61"/>
+</g>
+<!-- u17 -->
+<g id="node2" class="node">
+<title>u17</title>
+<ellipse fill="#bbbbff" stroke="black" stroke-width="0" cx="332" cy="-393.95" rx="30.59" ry="18"/>
+<text text-anchor="middle" x="332" y="-390.25" font-family="Times-Roman" font-size="14.00">Utils</text>
+</g>
+<!-- u5 -->
+<g id="node6" class="node">
+<title>u5</title>
+<ellipse fill="#ffbbbb" stroke="black" stroke-width="0" cx="410" cy="-300.95" rx="33.6" ry="18"/>
+<text text-anchor="middle" x="410" y="-297.25" font-family="Times-Roman" font-size="14.00">JSON</text>
+</g>
+<!-- u17&#45;&gt;u5 -->
+<g id="edge16" class="edge">
+<title>u17&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M345.23,-377.52C357.37,-363.35 375.54,-342.16 389.55,-325.81"/>
+<polygon fill="black" stroke="black" points="392.59,-327.64 396.44,-317.77 387.28,-323.09 392.59,-327.64"/>
+</g>
+<!-- u19 -->
+<g id="node3" class="node">
+<title>u19</title>
+<ellipse fill="#bbbbff" stroke="black" stroke-width="0" cx="256" cy="-486.95" rx="57.69" ry="18"/>
+<text text-anchor="middle" x="256" y="-483.25" font-family="Times-Roman" font-size="14.00">IOStreams</text>
+</g>
+<!-- u19&#45;&gt;u17 -->
+<g id="edge17" class="edge">
+<title>u19&#45;&gt;u17</title>
+<path fill="none" stroke="black" d="M272.49,-469.68C280.19,-461.83 289.33,-452.14 297,-442.95 303.18,-435.56 309.51,-427.17 315.06,-419.49"/>
+<polygon fill="black" stroke="black" points="318.21,-421.09 321.16,-410.91 312.51,-417.03 318.21,-421.09"/>
+</g>
+<!-- u3 -->
+<g id="node4" class="node">
+<title>u3</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="2" cx="399" cy="-220.95" rx="36.29" ry="18"/>
+<text text-anchor="middle" x="399" y="-217.25" font-family="Times-Roman" font-size="14.00">Types</text>
+</g>
+<!-- u4 -->
+<g id="node5" class="node">
+<title>u4</title>
+<ellipse fill="#ffbbbb" stroke="black" stroke-width="0" cx="319" cy="-300.95" rx="39.79" ry="18"/>
+<text text-anchor="middle" x="319" y="-297.25" font-family="Times-Roman" font-size="14.00">Optics</text>
+</g>
+<!-- u4&#45;&gt;u3 -->
+<g id="edge18" class="edge">
+<title>u4&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M335.19,-284.17C346.87,-272.78 362.8,-257.24 375.83,-244.55"/>
+<polygon fill="black" stroke="black" points="378.39,-246.94 383.11,-237.45 373.5,-241.92 378.39,-246.94"/>
+</g>
+<!-- u6 -->
+<g id="node12" class="node">
+<title>u6</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="638" cy="-486.95" rx="64.19" ry="18"/>
+<text text-anchor="middle" x="638" y="-483.25" font-family="Times-Roman" font-size="14.00">MegaParsec</text>
+</g>
+<!-- u5&#45;&gt;u6 -->
+<g id="edge19" class="edge">
+<title>u5&#45;&gt;u6</title>
+<path fill="none" stroke="black" d="M425.28,-317.32C443.67,-335.87 472.3,-364.95 474,-367.95 491,-397.97 469.27,-418.9 494,-442.95 518.89,-467.15 536.76,-450.95 570,-460.95 577.45,-463.2 585.27,-465.82 592.85,-468.5"/>
+<polygon fill="black" stroke="black" points="591.68,-471.8 602.27,-471.91 594.06,-465.22 591.68,-471.8"/>
+</g>
+<!-- u7 -->
+<g id="node13" class="node">
+<title>u7</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="618" cy="-220.95" rx="44.39" ry="18"/>
+<text text-anchor="middle" x="618" y="-217.25" font-family="Times-Roman" font-size="14.00">Prelude</text>
+</g>
+<!-- u5&#45;&gt;u7 -->
+<g id="edge20" class="edge">
+<title>u5&#45;&gt;u7</title>
+<path fill="none" stroke="black" d="M429.11,-285.89C434.97,-281.99 441.58,-277.99 448,-274.95 487.67,-256.18 535.63,-241.92 570.48,-232.95"/>
+<polygon fill="black" stroke="black" points="571.56,-236.29 580.4,-230.45 569.85,-229.51 571.56,-236.29"/>
+</g>
+<!-- u9 -->
+<g id="node8" class="node">
+<title>u9</title>
+<ellipse fill="#ffbbff" stroke="black" stroke-width="0" cx="699" cy="-300.95" rx="51.19" ry="18"/>
+<text text-anchor="middle" x="699" y="-297.25" font-family="Times-Roman" font-size="14.00">Common</text>
+</g>
+<!-- u12&#45;&gt;u9 -->
+<g id="edge30" class="edge">
+<title>u12&#45;&gt;u9</title>
+<path fill="none" stroke="black" d="M690.07,-375.84C691.65,-362.75 693.87,-344.43 695.69,-329.32"/>
+<polygon fill="black" stroke="black" points="699.21,-329.34 696.94,-318.99 692.27,-328.5 699.21,-329.34"/>
+</g>
+<!-- u9&#45;&gt;u7 -->
+<g id="edge31" class="edge">
+<title>u9&#45;&gt;u7</title>
+<path fill="none" stroke="black" d="M682.22,-283.79C670.52,-272.53 654.74,-257.34 641.76,-244.83"/>
+<polygon fill="black" stroke="black" points="644.12,-242.24 634.48,-237.83 639.26,-247.29 644.12,-242.24"/>
+</g>
+<!-- u10 -->
+<g id="node9" class="node">
+<title>u10</title>
+<ellipse fill="#77ff77" stroke="black" stroke-width="0" cx="618" cy="-55.95" rx="27" ry="18"/>
+<text text-anchor="middle" x="618" y="-52.25" font-family="Times-Roman" font-size="14.00">QQ</text>
+</g>
+<!-- u16 -->
+<g id="node10" class="node">
+<title>u16</title>
+<ellipse fill="#ffff77" stroke="black" stroke-width="0" cx="747" cy="-486.95" rx="27" ry="18"/>
+<text text-anchor="middle" x="747" y="-483.25" font-family="Times-Roman" font-size="14.00">QQ</text>
+</g>
+<!-- u15 -->
+<g id="node11" class="node">
+<title>u15</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="2" cx="823" cy="-486.95" rx="30.59" ry="18"/>
+<text text-anchor="middle" x="823" y="-483.25" font-family="Times-Roman" font-size="14.00">Utils</text>
+</g>
+<!-- u15&#45;&gt;u12 -->
+<g id="edge22" class="edge">
+<title>u15&#45;&gt;u12</title>
+<path fill="none" stroke="black" d="M803.42,-472.71C797.8,-468.92 791.66,-464.77 786,-460.95 761.96,-444.74 734.59,-426.31 714.9,-413.05"/>
+<polygon fill="black" stroke="black" points="716.68,-410.03 706.43,-407.35 712.77,-415.84 716.68,-410.03"/>
+</g>
+<!-- u15&#45;&gt;u11 -->
+<g id="edge21" class="edge">
+<title>u15&#45;&gt;u11</title>
+<path fill="none" stroke="black" d="M805.88,-471.91C799.92,-467.72 792.97,-463.55 786,-460.95 723.08,-437.5 693.45,-477.7 636,-442.95 627.23,-437.65 620.23,-429.02 614.98,-420.54"/>
+<polygon fill="black" stroke="black" points="617.89,-418.57 609.96,-411.54 611.78,-421.98 617.89,-418.57"/>
+</g>
+<!-- u6&#45;&gt;u3 -->
+<g id="edge23" class="edge">
+<title>u6&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M608.52,-470.77C594.78,-463.16 578.53,-453.36 565,-442.95 527.38,-414.03 523.93,-400.08 489,-367.95 479.95,-359.63 474.21,-360.56 468,-349.95 450.82,-320.62 469.18,-304.85 453,-274.95 446.44,-262.83 436.18,-251.74 426.36,-242.87"/>
+<polygon fill="black" stroke="black" points="428.53,-240.12 418.66,-236.26 423.97,-245.43 428.53,-240.12"/>
+</g>
+<!-- u8 -->
+<g id="node14" class="node">
+<title>u8</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="618" cy="-139.95" rx="42.49" ry="18"/>
+<text text-anchor="middle" x="618" y="-136.25" font-family="Times-Roman" font-size="14.00">Logger</text>
+</g>
+<!-- u7&#45;&gt;u8 -->
+<g id="edge25" class="edge">
+<title>u7&#45;&gt;u8</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M618,-202.81C618,-192.67 618,-179.59 618,-168.07"/>
+<polygon fill="black" stroke="black" points="621.5,-168.06 618,-158.06 614.5,-168.06 621.5,-168.06"/>
+</g>
+<!-- u2 -->
+<g id="node17" class="node">
+<title>u2</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="520" cy="-300.95" rx="37.89" ry="18"/>
+<text text-anchor="middle" x="520" y="-297.25" font-family="Times-Roman" font-size="14.00">Errors</text>
+</g>
+<!-- u7&#45;&gt;u2 -->
+<g id="edge24" class="edge">
+<title>u7&#45;&gt;u2</title>
+<path fill="none" stroke="black" d="M598.83,-237.21C584.07,-248.96 563.49,-265.34 547.06,-278.42"/>
+<polygon fill="black" stroke="black" points="544.54,-275.95 538.9,-284.91 548.9,-281.43 544.54,-275.95"/>
+</g>
+<!-- u8&#45;&gt;u4 -->
+<g id="edge26" class="edge">
+<title>u8&#45;&gt;u4</title>
+<path fill="none" stroke="black" d="M576.88,-144.38C511.17,-150.66 386.55,-166.09 354,-194.95 331.93,-214.52 323.74,-248.37 320.73,-272.34"/>
+<polygon fill="black" stroke="black" points="317.22,-272.27 319.67,-282.57 324.18,-272.99 317.22,-272.27"/>
+</g>
+<!-- u8&#45;&gt;u9 -->
+<g id="edge27" class="edge">
+<title>u8&#45;&gt;u9</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M637.21,-156.09C648.59,-166.01 662.41,-179.89 671,-194.95 684.9,-219.32 692.1,-250.8 695.69,-272.91"/>
+<polygon fill="black" stroke="black" points="692.25,-273.56 697.18,-282.94 699.17,-272.53 692.25,-273.56"/>
+</g>
+<!-- u8&#45;&gt;u10 -->
+<g id="edge28" class="edge">
+<title>u8&#45;&gt;u10</title>
+<path fill="none" stroke="black" d="M618,-121.56C618,-110.73 618,-96.56 618,-84.25"/>
+<polygon fill="black" stroke="black" points="621.5,-84.04 618,-74.04 614.5,-84.04 621.5,-84.04"/>
+</g>
+<!-- u11&#45;&gt;u5 -->
+<g id="edge29" class="edge">
+<title>u11&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M575.99,-387.58C537.44,-379.55 469,-363.89 448,-349.95 439.06,-344.02 431.26,-335.31 425.1,-326.92"/>
+<polygon fill="black" stroke="black" points="427.82,-324.71 419.28,-318.44 422.05,-328.67 427.82,-324.71"/>
+</g>
+<!-- u0 -->
+<g id="node16" class="node">
+<title>u0</title>
+<ellipse fill="#bbffbb" stroke="black" stroke-width="2" cx="627" cy="-605.95" rx="42.49" ry="18"/>
+<text text-anchor="middle" x="627" y="-602.25" font-family="Times-Roman" font-size="14.00">GHCup</text>
+</g>
+<!-- u0&#45;&gt;u1 -->
+<g id="edge4" class="edge">
+<title>u0&#45;&gt;u1</title>
+<path fill="none" stroke="black" d="M584.67,-604.4C545.83,-602.07 488.09,-593.82 446,-566.95 425.91,-554.13 410.22,-531.89 400.09,-514.27"/>
+<polygon fill="black" stroke="black" points="402.91,-512.13 395.04,-505.04 396.77,-515.5 402.91,-512.13"/>
+</g>
+<!-- u0&#45;&gt;u16 -->
+<g id="edge6" class="edge">
+<title>u0&#45;&gt;u16</title>
+<path fill="none" stroke="black" d="M663.33,-596.57C681.18,-590.83 701.84,-581.54 716,-566.95 729.77,-552.77 737.62,-531.76 741.97,-514.97"/>
+<polygon fill="black" stroke="black" points="745.4,-515.69 744.26,-505.16 738.58,-514.11 745.4,-515.69"/>
+</g>
+<!-- u0&#45;&gt;u15 -->
+<g id="edge5" class="edge">
+<title>u0&#45;&gt;u15</title>
+<path fill="none" stroke="black" d="M669.23,-604.64C704.08,-602.27 753,-593.85 786,-566.95 801.95,-553.96 811.39,-532.52 816.74,-515.25"/>
+<polygon fill="black" stroke="black" points="820.24,-515.72 819.56,-505.15 813.5,-513.84 820.24,-515.72"/>
+</g>
+<!-- u14 -->
+<g id="node19" class="node">
+<title>u14</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="508" cy="-486.95" rx="48.19" ry="18"/>
+<text text-anchor="middle" x="508" y="-483.25" font-family="Times-Roman" font-size="14.00">Platform</text>
+</g>
+<!-- u0&#45;&gt;u14 -->
+<g id="edge3" class="edge">
+<title>u0&#45;&gt;u14</title>
+<path fill="none" stroke="black" d="M599.25,-592.23C586.98,-585.76 572.9,-577.11 562,-566.95 545.64,-551.71 531.56,-530.66 521.88,-514.12"/>
+<polygon fill="black" stroke="black" points="524.68,-511.96 516.71,-504.98 518.59,-515.41 524.68,-511.96"/>
+</g>
+<!-- u2&#45;&gt;u3 -->
+<g id="edge7" class="edge">
+<title>u2&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M498.37,-286.01C479.01,-273.53 450.45,-255.12 428.91,-241.23"/>
+<polygon fill="black" stroke="black" points="430.75,-238.25 420.45,-235.78 426.95,-244.14 430.75,-238.25"/>
+</g>
+<!-- u13&#45;&gt;u3 -->
+<g id="edge8" class="edge">
+<title>u13&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M144.85,-290.31C198.89,-275.78 300.93,-248.33 357.9,-233.01"/>
+<polygon fill="black" stroke="black" points="358.91,-236.36 367.66,-230.38 357.09,-229.6 358.91,-236.36"/>
+</g>
+<!-- u14&#45;&gt;u5 -->
+<g id="edge9" class="edge">
+<title>u14&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M492.36,-469.49C485.88,-461.9 478.78,-452.48 474,-442.95 458.54,-412.12 468.2,-399.39 454,-367.95 447.34,-353.21 437.53,-338.1 428.85,-326.06"/>
+<polygon fill="black" stroke="black" points="431.57,-323.84 422.81,-317.89 425.94,-328.01 431.57,-323.84"/>
+</g>
+<!-- u14&#45;&gt;u12 -->
+<g id="edge10" class="edge">
+<title>u14&#45;&gt;u12</title>
+<path fill="none" stroke="black" d="M534.95,-471.89C543.43,-467.9 552.95,-463.86 562,-460.95 602.92,-447.83 621.35,-466.95 657,-442.95 665.13,-437.48 671.61,-429.08 676.49,-420.83"/>
+<polygon fill="black" stroke="black" points="679.72,-422.21 681.33,-411.74 673.54,-418.92 679.72,-422.21"/>
+</g>
+<!-- u18 -->
+<g id="node20" class="node">
+<title>u18</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="109" cy="-393.95" rx="73.39" ry="18"/>
+<text text-anchor="middle" x="109" y="-390.25" font-family="Times-Roman" font-size="14.00">Requirements</text>
+</g>
+<!-- u18&#45;&gt;u5 -->
+<g id="edge12" class="edge">
+<title>u18&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M147.73,-378.58C159.84,-374.58 173.34,-370.6 186,-367.95 265.56,-351.31 295.73,-387.15 368,-349.95 378.45,-344.58 387.45,-335.41 394.41,-326.53"/>
+<polygon fill="black" stroke="black" points="397.39,-328.37 400.44,-318.22 391.73,-324.26 397.39,-328.37"/>
+</g>
+<!-- u18&#45;&gt;u13 -->
+<g id="edge11" class="edge">
+<title>u18&#45;&gt;u13</title>
+<path fill="none" stroke="black" d="M109,-375.84C109,-362.75 109,-344.43 109,-329.32"/>
+<polygon fill="black" stroke="black" points="112.5,-328.99 109,-318.99 105.5,-328.99 112.5,-328.99"/>
+</g>
+<!-- u20 -->
+<g id="node21" class="node">
+<title>u20</title>
+<ellipse fill="#bbffbb" stroke="black" stroke-width="0" cx="627" cy="-769.95" rx="32.49" ry="18"/>
+<text text-anchor="middle" x="627" y="-766.25" font-family="Times-Roman" font-size="14.00">Main</text>
+</g>
+<!-- u21 -->
+<g id="node22" class="node">
+<title>u21</title>
+<ellipse fill="#bbffbb" stroke="black" stroke-width="0" cx="627" cy="-689.95" rx="46.29" ry="18"/>
+<text text-anchor="middle" x="627" y="-686.25" font-family="Times-Roman" font-size="14.00">Validate</text>
+</g>
+<!-- u20&#45;&gt;u21 -->
+<g id="edge1" class="edge">
+<title>u20&#45;&gt;u21</title>
+<path fill="none" stroke="black" d="M627,-751.64C627,-741.85 627,-729.38 627,-718.29"/>
+<polygon fill="black" stroke="black" points="630.5,-718.22 627,-708.22 623.5,-718.22 630.5,-718.22"/>
+</g>
+<!-- u21&#45;&gt;u0 -->
+<g id="edge2" class="edge">
+<title>u21&#45;&gt;u0</title>
+<path fill="none" stroke="black" d="M627,-671.56C627,-660.73 627,-646.56 627,-634.25"/>
+<polygon fill="black" stroke="black" points="630.5,-634.04 627,-624.04 623.5,-634.04 630.5,-634.04"/>
+</g>
+</g>
+</svg>

docs/modules_wide.svg

@@ -0,0 +1,366 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Generated by graphviz version 2.44.0 (0)
+ -->
+<!-- Title: G Pages: 1 -->
+<svg width="1075pt" height="648pt"
+ viewBox="0.00 0.00 1075.16 648.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(0.91 0.91) rotate(0) translate(4 710)">
+<title>G</title>
+<polygon fill="white" stroke="transparent" points="-4,4 -4,-710 1180.67,-710 1180.67,4 -4,4"/>
+<g id="clust1" class="cluster">
+<title>cluster_0</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="10.72,-8 10.72,-590 1165.95,-590 1165.95,-8 10.72,-8"/>
+<text text-anchor="middle" x="588.33" y="-574.8" font-family="Times-Roman" font-size="14.00">GHCup</text>
+</g>
+<g id="clust2" class="cluster">
+<title>cluster_1</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="254.63,-326 254.63,-484 603.08,-484 603.08,-326 254.63,-326"/>
+<text text-anchor="middle" x="428.85" y="-468.8" font-family="Times-Roman" font-size="14.00">Download</text>
+</g>
+<g id="clust3" class="cluster">
+<title>cluster_2</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="363.19,-171 363.19,-318 605.76,-318 605.76,-171 363.19,-171"/>
+<text text-anchor="middle" x="484.47" y="-302.8" font-family="Times-Roman" font-size="14.00">Types</text>
+</g>
+<g id="clust4" class="cluster">
+<title>cluster_3</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="758.53,-16 758.53,-515 1155.22,-515 1155.22,-16 758.53,-16"/>
+<text text-anchor="middle" x="956.88" y="-499.8" font-family="Times-Roman" font-size="14.00">Utils</text>
+</g>
+<g id="clust5" class="cluster">
+<title>cluster_4</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="857.71,-243 857.71,-401 1015.85,-401 1015.85,-243 857.71,-243"/>
+<text text-anchor="middle" x="936.78" y="-385.8" font-family="Times-Roman" font-size="14.00">File</text>
+</g>
+<g id="clust6" class="cluster">
+<title>cluster_5</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="781.32,-24 781.32,-99 875.13,-99 875.13,-24 781.32,-24"/>
+<text text-anchor="middle" x="828.22" y="-83.8" font-family="Times-Roman" font-size="14.00">String</text>
+</g>
+<g id="clust7" class="cluster">
+<title>cluster_6</title>
+<polygon fill="#000000" fill-opacity="0.058824" stroke="#000000" stroke-opacity="0.058824" points="954.2,-409 954.2,-484 1048.01,-484 1048.01,-409 954.2,-409"/>
+<text text-anchor="middle" x="1001.1" y="-468.8" font-family="Times-Roman" font-size="14.00">Version</text>
+</g>
+<!-- u1 -->
+<g id="node1" class="node">
+<title>u1</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="2" cx="518.39" cy="-435" rx="55.49" ry="18"/>
+<text text-anchor="middle" x="518.39" y="-431.3" font-family="Times-Roman" font-size="14.00">Download</text>
+</g>
+<!-- u12 -->
+<g id="node7" class="node">
+<title>u12</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="2" cx="922.39" cy="-352" rx="27" ry="18"/>
+<text text-anchor="middle" x="922.39" y="-348.3" font-family="Times-Roman" font-size="14.00">File</text>
+</g>
+<!-- u1&#45;&gt;u12 -->
+<g id="edge15" class="edge">
+<title>u1&#45;&gt;u12</title>
+<path fill="none" stroke="black" d="M546.79,-419.43C556.27,-415.25 567.06,-411.24 577.39,-409 594.44,-405.31 876.17,-409.54 891.39,-401 900.16,-396.08 906.84,-387.53 911.72,-379"/>
+<polygon fill="black" stroke="black" points="914.92,-380.43 916.31,-369.92 908.67,-377.26 914.92,-380.43"/>
+</g>
+<!-- u11 -->
+<g id="node15" class="node">
+<title>u11</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="808.39" cy="-352" rx="28.7" ry="18"/>
+<text text-anchor="middle" x="808.39" y="-348.3" font-family="Times-Roman" font-size="14.00">Dirs</text>
+</g>
+<!-- u1&#45;&gt;u11 -->
+<g id="edge14" class="edge">
+<title>u1&#45;&gt;u11</title>
+<path fill="none" stroke="black" d="M548.95,-419.93C557.99,-416.08 567.99,-412.11 577.39,-409 586.69,-405.92 709.34,-376.59 772.03,-361.65"/>
+<polygon fill="black" stroke="black" points="772.99,-365.02 781.91,-359.3 771.37,-358.21 772.99,-365.02"/>
+</g>
+<!-- u13 -->
+<g id="node18" class="node">
+<title>u13</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="146.39" cy="-269" rx="44.39" ry="18"/>
+<text text-anchor="middle" x="146.39" y="-265.3" font-family="Times-Roman" font-size="14.00">Version</text>
+</g>
+<!-- u1&#45;&gt;u13 -->
+<g id="edge13" class="edge">
+<title>u1&#45;&gt;u13</title>
+<path fill="none" stroke="black" d="M477.97,-422.58C457.84,-417.42 433.02,-411.85 410.39,-409 400.85,-407.8 71.11,-407.88 64.39,-401 41.09,-377.16 48.83,-355.48 64.39,-326 73.49,-308.76 90.55,-295.83 106.76,-286.76"/>
+<polygon fill="black" stroke="black" points="108.39,-289.86 115.62,-282.11 105.14,-283.66 108.39,-289.86"/>
+</g>
+<!-- u17 -->
+<g id="node2" class="node">
+<title>u17</title>
+<ellipse fill="#bbbbff" stroke="black" stroke-width="0" cx="445.39" cy="-352" rx="30.59" ry="18"/>
+<text text-anchor="middle" x="445.39" y="-348.3" font-family="Times-Roman" font-size="14.00">Utils</text>
+</g>
+<!-- u5 -->
+<g id="node6" class="node">
+<title>u5</title>
+<ellipse fill="#ffbbbb" stroke="black" stroke-width="0" cx="549.39" cy="-269" rx="33.6" ry="18"/>
+<text text-anchor="middle" x="549.39" y="-265.3" font-family="Times-Roman" font-size="14.00">JSON</text>
+</g>
+<!-- u17&#45;&gt;u5 -->
+<g id="edge16" class="edge">
+<title>u17&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M463.03,-337.26C479.49,-324.44 504.26,-305.15 523.05,-290.51"/>
+<polygon fill="black" stroke="black" points="525.22,-293.26 530.96,-284.35 520.92,-287.74 525.22,-293.26"/>
+</g>
+<!-- u19 -->
+<g id="node3" class="node">
+<title>u19</title>
+<ellipse fill="#bbbbff" stroke="black" stroke-width="0" cx="343.39" cy="-435" rx="57.69" ry="18"/>
+<text text-anchor="middle" x="343.39" y="-431.3" font-family="Times-Roman" font-size="14.00">IOStreams</text>
+</g>
+<!-- u19&#45;&gt;u17 -->
+<g id="edge17" class="edge">
+<title>u19&#45;&gt;u17</title>
+<path fill="none" stroke="black" d="M378.72,-420.5C389.55,-415.38 401.06,-408.84 410.39,-401 418.16,-394.47 425.12,-385.87 430.76,-377.75"/>
+<polygon fill="black" stroke="black" points="433.77,-379.54 436.33,-369.25 427.92,-375.7 433.77,-379.54"/>
+</g>
+<!-- u3 -->
+<g id="node4" class="node">
+<title>u3</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="2" cx="534.39" cy="-197" rx="36.29" ry="18"/>
+<text text-anchor="middle" x="534.39" y="-193.3" font-family="Times-Roman" font-size="14.00">Types</text>
+</g>
+<!-- u4 -->
+<g id="node5" class="node">
+<title>u4</title>
+<ellipse fill="#ffbbbb" stroke="black" stroke-width="0" cx="427.39" cy="-269" rx="39.79" ry="18"/>
+<text text-anchor="middle" x="427.39" y="-265.3" font-family="Times-Roman" font-size="14.00">Optics</text>
+</g>
+<!-- u4&#45;&gt;u3 -->
+<g id="edge18" class="edge">
+<title>u4&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M449.04,-253.83C464.95,-243.42 486.78,-229.15 504.37,-217.64"/>
+<polygon fill="black" stroke="black" points="506.68,-220.31 513.13,-211.91 502.85,-214.45 506.68,-220.31"/>
+</g>
+<!-- u6 -->
+<g id="node12" class="node">
+<title>u6</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="855.39" cy="-435" rx="64.19" ry="18"/>
+<text text-anchor="middle" x="855.39" y="-431.3" font-family="Times-Roman" font-size="14.00">MegaParsec</text>
+</g>
+<!-- u5&#45;&gt;u6 -->
+<g id="edge19" class="edge">
+<title>u5&#45;&gt;u6</title>
+<path fill="none" stroke="black" d="M566.7,-284.68C579.52,-295.01 597.75,-308.62 615.39,-318 624.58,-322.89 630.09,-318.59 637.39,-326 662.15,-351.13 635.32,-379.63 663.39,-401 674.37,-409.36 773.88,-406.14 787.39,-409 795.7,-410.76 804.37,-413.33 812.61,-416.16"/>
+<polygon fill="black" stroke="black" points="811.46,-419.47 822.06,-419.57 813.84,-412.88 811.46,-419.47"/>
+</g>
+<!-- u7 -->
+<g id="node13" class="node">
+<title>u7</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="828.39" cy="-197" rx="44.39" ry="18"/>
+<text text-anchor="middle" x="828.39" y="-193.3" font-family="Times-Roman" font-size="14.00">Prelude</text>
+</g>
+<!-- u5&#45;&gt;u7 -->
+<g id="edge20" class="edge">
+<title>u5&#45;&gt;u7</title>
+<path fill="none" stroke="black" d="M567.9,-253.71C573.85,-249.71 580.65,-245.72 587.39,-243 648.94,-218.19 724.91,-206.91 774.9,-201.88"/>
+<polygon fill="black" stroke="black" points="775.54,-205.33 785.16,-200.9 774.87,-198.36 775.54,-205.33"/>
+</g>
+<!-- u9 -->
+<g id="node8" class="node">
+<title>u9</title>
+<ellipse fill="#ffbbff" stroke="black" stroke-width="0" cx="936.39" cy="-269" rx="51.19" ry="18"/>
+<text text-anchor="middle" x="936.39" y="-265.3" font-family="Times-Roman" font-size="14.00">Common</text>
+</g>
+<!-- u12&#45;&gt;u9 -->
+<g id="edge30" class="edge">
+<title>u12&#45;&gt;u9</title>
+<path fill="none" stroke="black" d="M925.36,-333.82C927.2,-323.19 929.6,-309.31 931.69,-297.2"/>
+<polygon fill="black" stroke="black" points="935.17,-297.6 933.42,-287.15 928.27,-296.41 935.17,-297.6"/>
+</g>
+<!-- u9&#45;&gt;u7 -->
+<g id="edge31" class="edge">
+<title>u9&#45;&gt;u7</title>
+<path fill="none" stroke="black" d="M912.96,-252.81C897.32,-242.68 876.58,-229.24 859.56,-218.2"/>
+<polygon fill="black" stroke="black" points="861.33,-215.18 851.04,-212.68 857.53,-221.06 861.33,-215.18"/>
+</g>
+<!-- u10 -->
+<g id="node9" class="node">
+<title>u10</title>
+<ellipse fill="#77ff77" stroke="black" stroke-width="0" cx="828.39" cy="-50" rx="27" ry="18"/>
+<text text-anchor="middle" x="828.39" y="-46.3" font-family="Times-Roman" font-size="14.00">QQ</text>
+</g>
+<!-- u16 -->
+<g id="node10" class="node">
+<title>u16</title>
+<ellipse fill="#ffff77" stroke="black" stroke-width="0" cx="1001.39" cy="-435" rx="27" ry="18"/>
+<text text-anchor="middle" x="1001.39" y="-431.3" font-family="Times-Roman" font-size="14.00">QQ</text>
+</g>
+<!-- u15 -->
+<g id="node11" class="node">
+<title>u15</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="2" cx="1103.39" cy="-435" rx="30.59" ry="18"/>
+<text text-anchor="middle" x="1103.39" y="-431.3" font-family="Times-Roman" font-size="14.00">Utils</text>
+</g>
+<!-- u15&#45;&gt;u12 -->
+<g id="edge22" class="edge">
+<title>u15&#45;&gt;u12</title>
+<path fill="none" stroke="black" d="M1080.91,-422.68C1072.07,-418.31 1061.8,-413.33 1052.39,-409 1019.33,-393.79 981.02,-377.44 954.59,-366.35"/>
+<polygon fill="black" stroke="black" points="955.66,-363.01 945.08,-362.38 952.96,-369.47 955.66,-363.01"/>
+</g>
+<!-- u15&#45;&gt;u11 -->
+<g id="edge21" class="edge">
+<title>u15&#45;&gt;u11</title>
+<path fill="none" stroke="black" d="M1082.81,-421.48C1073.8,-416.65 1062.9,-411.66 1052.39,-409 1009.49,-398.14 893.64,-419.41 853.39,-401 842.1,-395.84 832.28,-386.4 824.72,-377.25"/>
+<polygon fill="black" stroke="black" points="827.3,-374.87 818.44,-369.07 821.75,-379.13 827.3,-374.87"/>
+</g>
+<!-- u6&#45;&gt;u3 -->
+<g id="edge23" class="edge">
+<title>u6&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M817.86,-420.3C799.34,-413.36 779.12,-405.48 770.39,-401 716.1,-373.14 711.12,-350.84 655.39,-326 642.79,-320.38 635.87,-326.98 625.39,-318 597.74,-294.3 614.8,-271.71 592.39,-243 584.81,-233.29 574.68,-224.49 565.01,-217.31"/>
+<polygon fill="black" stroke="black" points="566.89,-214.35 556.71,-211.43 562.85,-220.06 566.89,-214.35"/>
+</g>
+<!-- u8 -->
+<g id="node14" class="node">
+<title>u8</title>
+<ellipse fill="#bbffff" stroke="black" stroke-width="0" cx="828.39" cy="-125" rx="42.49" ry="18"/>
+<text text-anchor="middle" x="828.39" y="-121.3" font-family="Times-Roman" font-size="14.00">Logger</text>
+</g>
+<!-- u7&#45;&gt;u8 -->
+<g id="edge25" class="edge">
+<title>u7&#45;&gt;u8</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M828.39,-178.7C828.39,-170.98 828.39,-161.71 828.39,-153.11"/>
+<polygon fill="black" stroke="black" points="831.89,-153.1 828.39,-143.1 824.89,-153.1 831.89,-153.1"/>
+</g>
+<!-- u2 -->
+<g id="node17" class="node">
+<title>u2</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="696.39" cy="-269" rx="37.89" ry="18"/>
+<text text-anchor="middle" x="696.39" y="-265.3" font-family="Times-Roman" font-size="14.00">Errors</text>
+</g>
+<!-- u7&#45;&gt;u2 -->
+<g id="edge24" class="edge">
+<title>u7&#45;&gt;u2</title>
+<path fill="none" stroke="black" d="M802.53,-211.71C781.65,-222.79 752.12,-238.45 729.51,-250.44"/>
+<polygon fill="black" stroke="black" points="727.8,-247.38 720.6,-255.16 731.07,-253.57 727.8,-247.38"/>
+</g>
+<!-- u8&#45;&gt;u4 -->
+<g id="edge26" class="edge">
+<title>u8&#45;&gt;u4</title>
+<path fill="none" stroke="black" d="M786.3,-127.22C706.73,-130.23 537.84,-140.15 489.39,-171 463.54,-187.46 446.42,-218.99 436.84,-241.64"/>
+<polygon fill="black" stroke="black" points="433.54,-240.45 433.08,-251.04 440.04,-243.06 433.54,-240.45"/>
+</g>
+<!-- u8&#45;&gt;u9 -->
+<g id="edge27" class="edge">
+<title>u8&#45;&gt;u9</title>
+<path fill="none" stroke="black" stroke-dasharray="5,2" d="M849.03,-140.76C859.52,-148.9 872,-159.65 881.39,-171 899.5,-192.89 914.92,-221.56 924.79,-242.04"/>
+<polygon fill="black" stroke="black" points="921.62,-243.54 929.04,-251.1 927.96,-240.56 921.62,-243.54"/>
+</g>
+<!-- u8&#45;&gt;u10 -->
+<g id="edge28" class="edge">
+<title>u8&#45;&gt;u10</title>
+<path fill="none" stroke="black" d="M828.39,-106.7C828.39,-98.25 828.39,-87.87 828.39,-78.37"/>
+<polygon fill="black" stroke="black" points="831.89,-78.18 828.39,-68.18 824.89,-78.18 831.89,-78.18"/>
+</g>
+<!-- u11&#45;&gt;u5 -->
+<g id="edge29" class="edge">
+<title>u11&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M781.07,-346.57C749.06,-341.43 694.42,-332.79 647.39,-326 620.76,-322.16 610.78,-331.29 587.39,-318 577.83,-312.56 569.78,-303.68 563.6,-295.02"/>
+<polygon fill="black" stroke="black" points="566.46,-293 558.04,-286.57 560.61,-296.85 566.46,-293"/>
+</g>
+<!-- u0 -->
+<g id="node16" class="node">
+<title>u0</title>
+<ellipse fill="#bbffbb" stroke="black" stroke-width="2" cx="840.39" cy="-541" rx="42.49" ry="18"/>
+<text text-anchor="middle" x="840.39" y="-537.3" font-family="Times-Roman" font-size="14.00">GHCup</text>
+</g>
+<!-- u0&#45;&gt;u1 -->
+<g id="edge4" class="edge">
+<title>u0&#45;&gt;u1</title>
+<path fill="none" stroke="black" d="M798.15,-540.08C733.62,-539.53 614.12,-535.65 577.39,-515 556.17,-503.07 540.32,-480.02 530.42,-461.88"/>
+<polygon fill="black" stroke="black" points="533.49,-460.2 525.79,-452.93 527.27,-463.42 533.49,-460.2"/>
+</g>
+<!-- u0&#45;&gt;u16 -->
+<g id="edge6" class="edge">
+<title>u0&#45;&gt;u16</title>
+<path fill="none" stroke="black" d="M881.32,-536.43C914.21,-532.8 957.04,-526.09 970.39,-515 985.87,-502.13 993.66,-480.49 997.55,-463.11"/>
+<polygon fill="black" stroke="black" points="1001.06,-463.44 999.51,-452.96 994.18,-462.12 1001.06,-463.44"/>
+</g>
+<!-- u0&#45;&gt;u15 -->
+<g id="edge5" class="edge">
+<title>u0&#45;&gt;u15</title>
+<path fill="none" stroke="black" d="M882.83,-539.21C936.42,-537.51 1024.95,-532.11 1052.39,-515 1071.91,-502.83 1085.39,-480.12 1093.57,-462.17"/>
+<polygon fill="black" stroke="black" points="1096.87,-463.35 1097.57,-452.78 1090.43,-460.6 1096.87,-463.35"/>
+</g>
+<!-- u14 -->
+<g id="node19" class="node">
+<title>u14</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="680.39" cy="-435" rx="48.19" ry="18"/>
+<text text-anchor="middle" x="680.39" y="-431.3" font-family="Times-Roman" font-size="14.00">Platform</text>
+</g>
+<!-- u0&#45;&gt;u14 -->
+<g id="edge3" class="edge">
+<title>u0&#45;&gt;u14</title>
+<path fill="none" stroke="black" d="M801.74,-533.4C786.24,-529.61 768.7,-523.78 754.39,-515 731.68,-501.06 711.42,-478.33 697.87,-460.82"/>
+<polygon fill="black" stroke="black" points="700.58,-458.59 691.78,-452.7 694.98,-462.8 700.58,-458.59"/>
+</g>
+<!-- u2&#45;&gt;u3 -->
+<g id="edge7" class="edge">
+<title>u2&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M669.27,-256.28C642.05,-244.52 599.95,-226.33 570.04,-213.4"/>
+<polygon fill="black" stroke="black" points="571.35,-210.16 560.79,-209.41 568.58,-216.59 571.35,-210.16"/>
+</g>
+<!-- u13&#45;&gt;u3 -->
+<g id="edge8" class="edge">
+<title>u13&#45;&gt;u3</title>
+<path fill="none" stroke="black" d="M186.09,-260.84C259.14,-247.66 414.32,-219.66 490.43,-205.93"/>
+<polygon fill="black" stroke="black" points="491.41,-209.31 500.63,-204.09 490.17,-202.42 491.41,-209.31"/>
+</g>
+<!-- u14&#45;&gt;u5 -->
+<g id="edge9" class="edge">
+<title>u14&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M656.5,-419.22C649.64,-414.1 642.62,-407.9 637.39,-401 615.71,-372.38 627.41,-355.8 607.39,-326 598.66,-313.01 586.48,-300.68 575.54,-290.91"/>
+<polygon fill="black" stroke="black" points="577.72,-288.16 567.86,-284.28 573.14,-293.46 577.72,-288.16"/>
+</g>
+<!-- u14&#45;&gt;u12 -->
+<g id="edge10" class="edge">
+<title>u14&#45;&gt;u12</title>
+<path fill="none" stroke="black" d="M711.94,-421.27C724.88,-416.59 740.15,-411.77 754.39,-409 784.33,-403.18 865.04,-416.36 891.39,-401 900.07,-395.94 906.74,-387.36 911.63,-378.84"/>
+<polygon fill="black" stroke="black" points="914.82,-380.3 916.24,-369.8 908.58,-377.12 914.82,-380.3"/>
+</g>
+<!-- u18 -->
+<g id="node20" class="node">
+<title>u18</title>
+<ellipse fill="#ffffbb" stroke="black" stroke-width="0" cx="146.39" cy="-352" rx="73.39" ry="18"/>
+<text text-anchor="middle" x="146.39" y="-348.3" font-family="Times-Roman" font-size="14.00">Requirements</text>
+</g>
+<!-- u18&#45;&gt;u5 -->
+<g id="edge12" class="edge">
+<title>u18&#45;&gt;u5</title>
+<path fill="none" stroke="black" d="M192.35,-337.85C210.3,-333.27 231.16,-328.62 250.39,-326 300.18,-319.2 428.51,-333.26 476.39,-318 493.93,-312.41 511.26,-301.32 524.62,-291.22"/>
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+</g>
+<!-- u18&#45;&gt;u13 -->
+<g id="edge11" class="edge">
+<title>u18&#45;&gt;u13</title>
+<path fill="none" stroke="black" d="M146.39,-333.82C146.39,-323.19 146.39,-309.31 146.39,-297.2"/>
+<polygon fill="black" stroke="black" points="149.89,-297.15 146.39,-287.15 142.89,-297.15 149.89,-297.15"/>
+</g>
+<!-- u20 -->
+<g id="node21" class="node">
+<title>u20</title>
+<ellipse fill="#bbffbb" stroke="black" stroke-width="0" cx="840.39" cy="-688" rx="32.49" ry="18"/>
+<text text-anchor="middle" x="840.39" y="-684.3" font-family="Times-Roman" font-size="14.00">Main</text>
+</g>
+<!-- u21 -->
+<g id="node22" class="node">
+<title>u21</title>
+<ellipse fill="#bbffbb" stroke="black" stroke-width="0" cx="840.39" cy="-616" rx="46.29" ry="18"/>
+<text text-anchor="middle" x="840.39" y="-612.3" font-family="Times-Roman" font-size="14.00">Validate</text>
+</g>
+<!-- u20&#45;&gt;u21 -->
+<g id="edge1" class="edge">
+<title>u20&#45;&gt;u21</title>
+<path fill="none" stroke="black" d="M840.39,-669.7C840.39,-661.98 840.39,-652.71 840.39,-644.11"/>
+<polygon fill="black" stroke="black" points="843.89,-644.1 840.39,-634.1 836.89,-644.1 843.89,-644.1"/>
+</g>
+<!-- u21&#45;&gt;u0 -->
+<g id="edge2" class="edge">
+<title>u21&#45;&gt;u0</title>
+<path fill="none" stroke="black" d="M840.39,-597.7C840.39,-589.25 840.39,-578.87 840.39,-569.37"/>
+<polygon fill="black" stroke="black" points="843.89,-569.18 840.39,-559.18 836.89,-569.18 843.89,-569.18"/>
+</g>
+</g>
+</svg>

docs/os-freebsd.svg

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+<?xml version="1.0" encoding="utf-8"?>
+<!-- Svg Vector Icons : http://www.onlinewebfonts.com/icon -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" viewBox="0 0 1000 1000" enable-background="new 0 0 1000 1000" xml:space="preserve">
+<metadata> Svg Vector Icons : http://www.onlinewebfonts.com/icon </metadata>
+<g><path d="M81.5,647.7C11,409.2,148.6,158.9,388.6,88.9c106.5-31.1,215.5-21.4,309.8,19.8c-4.9,6.9-9.5,14-13.7,21c-46.1-10.7-81.4,3.8-90.2,43.3c-13.9,62.1,42.9,162.8,126.6,224.7c83.7,61.9,162.9,61.7,176.8-0.4c3.5-15.9,2.5-34.4-2.5-54.1c9.7-5.8,19.2-12.3,28.6-19.3c10.9,22.2,20,45.6,27.3,70.1c70.5,238.4-67.1,488.8-307.1,558.8C403.9,1022.8,151.9,886.1,81.5,647.7L81.5,647.7z M667.1,204.7c0.4-0.4,0.7-0.7,1-1.1C776.9,92.3,912.3,26.4,970.4,56.4c58.1,30.1-25.5,176.7-91.7,256.3c-20.1,20.6-41.2,39.7-62.5,56.8C742.2,343.2,686.1,282.8,667.1,204.7L667.1,204.7z M11,108.5C0.7,28.8,68.9,4.9,163.2,55.2c22.4,11.9,44.3,27,64.7,44.1c-56.2,38.6-104.5,90.4-139.5,154C46.4,206.7,16.9,153.5,11,108.5L11,108.5z"/></g>
+</svg>

docs/os-osx.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd">
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:xlink="http://www.w3.org/1999/xlink"
+   version="1.0"
+   width="800"
+   height="950"
+   id="svg2">
+  <defs
+     id="defs4">
+    <linearGradient
+       id="linearGradient3784">
+      <stop
+         id="stop3786"
+         style="stop-color:#ffffff;stop-opacity:1"
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+         style="stop-color:#888888;stop-opacity:1"
+         offset="1" />
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+    <linearGradient
+       id="linearGradient3776">
+      <stop
+         id="stop3778"
+         style="stop-color:#ffffff;stop-opacity:1"
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+         id="stop3780"
+         style="stop-color:#ffffff;stop-opacity:0"
+         offset="1" />
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+    <linearGradient
+       id="linearGradient3754">
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docs/os-windows.svg

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+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<!-- Created with Inkscape (http://www.inkscape.org/) by Marsupilami -->
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="766"
+   height="768"
+   viewBox="-2.61977004 -2.61977004 92.56520808 92.83416708"
+   id="svg8375">
+  <defs
+     id="defs8377" />
+  <path
+     d="M 0,12.40183 35.68737,7.5416 35.70297,41.96435 0.03321,42.16748 z m 35.67037,33.52906 0.0277,34.45332 -35.66989,-4.9041 -0.002,-29.77972 z M 39.99644,6.90595 87.31462,0 l 0,41.527 -47.31818,0.37565 z M 87.32567,46.25471 87.31457,87.59463 39.9964,80.91625 39.9301,46.17767 z"
+     id="path13" />
+</svg>
+<!-- version: 20110311, original size: 87.325668 87.594627, border: 3% -->

docs/overrides/base.html

@@ -0,0 +1,201 @@
+<!DOCTYPE html>
+<html lang="{{ config.theme.locale|default('en') }}">
+    <head>
+      {%- block site_meta %}
+        <meta charset="utf-8">
+        <meta http-equiv="X-UA-Compatible" content="IE=edge">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        {% if page and page.is_homepage %}<meta name="description" content="{{ config['site_description'] }}">{% endif %}
+        {% if config.site_author %}<meta name="author" content="{{ config.site_author }}">{% endif %}
+        {% if page and page.canonical_url %}<link rel="canonical" href="{{ page.canonical_url }}">{% endif %}
+        {% if config.site_favicon %}<link rel="shortcut icon" href="{{ config.site_favicon|url }}">
+        {% else %}<link rel="shortcut icon" href="{{ 'img/favicon.ico'|url }}">{% endif %}
+      {%- endblock %}
+
+      {%- block htmltitle %}
+        <title>{% if page and page.title and not page.is_homepage %}{{ page.title }} - {% endif %}{{ config.site_name }}</title>
+      {%- endblock %}
+
+      {%- block styles %}
+        <link href="{{ 'css/bootstrap.min.css'|url }}" rel="stylesheet">
+        <link href="{{ 'css/font-awesome.min.css'|url }}" rel="stylesheet">
+        <link href="{{ 'css/base.css'|url }}" rel="stylesheet">
+        {%- if config.theme.highlightjs %}
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.5.0/styles/{{ config.theme.hljs_style }}.min.css">
+        {%- endif %}
+        {%- for path in extra_css %}
+        <link href="{{ path }}" rel="stylesheet">
+        {%- endfor %}
+      {%- endblock %}
+
+      {%- block libs %}
+
+        <script src="{{ 'js/jquery-1.10.2.min.js'|url }}" defer></script>
+        <script src="{{ 'js/bootstrap.min.js'|url }}" defer></script>
+        {%- if config.theme.highlightjs %}
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.5.0/highlight.min.js"></script>
+        {%- for lang in config.theme.hljs_languages %}
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.5.0/languages/{{lang}}.min.js"></script>
+        {%- endfor %}
+        <script>hljs.initHighlightingOnLoad();</script>
+        {%- endif %}
+      {%- endblock %}
+
+      {%- block analytics %}
+        {%- if config.theme.analytics.gtag %}
+        <script async src="https://www.googletagmanager.com/gtag/js?id={{ config.theme.analytics.gtag }}"></script>
+        <script>
+          window.dataLayer = window.dataLayer || [];
+          function gtag(){dataLayer.push(arguments);}
+          gtag('js', new Date());
+
+          gtag('config', '{{ config.theme.analytics.gtag }}');
+        </script>
+        {%- elif config.google_analytics %}
+        <script>
+            (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
+            (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
+            m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
+            })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
+
+            ga('create', '{{ config.google_analytics[0] }}', '{{ config.google_analytics[1] }}');
+            ga('send', 'pageview');
+        </script>
+        {%- endif %}
+      {%- endblock %}
+
+      {%- block extrahead %} {% endblock %}
+    </head>
+
+    <body{% if page and page.is_homepage %} class="homepage"{% endif %}>
+        <div class="navbar fixed-top navbar-expand-lg navbar-{% if config.theme.nav_style == "light" %}light{% else %}dark{% endif %} bg-{{ config.theme.nav_style }}">
+            <div class="container">
+
+                {%- block site_name %}
+                <a class="navbar-brand" href="{{ nav.homepage.url|url }}">{{ config.site_name }}</a>
+                {%- endblock %}
+
+                {%- if nav|length>1 or (page and (page.next_page or page.previous_page)) or config.repo_url %}
+                <!-- Expander button -->
+                <button type="button" class="navbar-toggler" data-toggle="collapse" data-target="#navbar-collapse">
+                    <span class="navbar-toggler-icon"></span>
+                </button>
+                {%- endif %}
+
+                <!-- Expanded navigation -->
+                <div id="navbar-collapse" class="navbar-collapse collapse">
+                  {%- block site_nav %}
+                    {%- if nav|length>1 %}
+                        <!-- Main navigation -->
+                        <ul class="nav navbar-nav">
+                        {%- for nav_item in nav %}
+                        {%- if nav_item.children %}
+                            <li class="dropdown{% if nav_item.active %} active{% endif %}">
+                                <a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown">{{ nav_item.title }} <b class="caret"></b></a>
+                                <ul class="dropdown-menu">
+                                {%- for nav_item in nav_item.children %}
+                                    {% include "nav-sub.html" %}
+                                {%- endfor %}
+                                </ul>
+                            </li>
+                        {%- else %}
+                            <li class="navitem{% if nav_item.active %} active{% endif %}">
+                                <a href="{{ nav_item.url|url }}" class="nav-link">{{ nav_item.title }}</a>
+                            </li>
+                        {%- endif %}
+                        {%- endfor %}
+                        </ul>
+                    {%- endif %}
+                  {%- endblock %}
+
+                    <ul class="nav navbar-nav ml-auto">
+                      {%- block search_button %}
+                        {%- if 'search' in config['plugins'] %}
+                        <li class="nav-item">
+                            <a href="#" class="nav-link" data-toggle="modal" data-target="#mkdocs_search_modal">
+                                <i class="fa fa-search"></i> {% trans %}Search{% endtrans %}
+                            </a>
+                        </li>
+                        {%- endif %}
+                      {%- endblock %}
+
+                      {%- block next_prev %}
+                      {%- endblock %}
+
+                      {%- block repo %}
+                        {%- if page and page.edit_url %}
+                            <li class="nav-item">
+                                <a href="{{ page.edit_url }}" class="nav-link">
+                                    {%- if config.repo_name == 'GitHub' -%}
+                                        <i class="fa fa-github"></i> {% trans repo_name=config.repo_name %}Edit on {{ repo_name }}{% endtrans %}
+                                    {%- elif config.repo_name == 'Bitbucket' -%}
+                                        <i class="fa fa-bitbucket"></i> {% trans repo_name=config.repo_name %}Edit on {{ repo_name }}{% endtrans %}
+                                    {%- elif config.repo_name == 'GitLab' -%}
+                                        <i class="fa fa-gitlab"></i> {% trans repo_name=config.repo_name %}Edit on {{ repo_name }}{% endtrans %}
+                                    {%- else -%}
+                                    {% trans repo_name=config.repo_name%}Edit on {{ repo_name }}{% endtrans %}
+                                    {%- endif -%}
+                                </a>
+                            </li>
+                        {%- elif config.repo_url %}
+                            <li class="nav-item">
+                                <a href="{{ config.repo_url }}" class="nav-link">
+                                    {%- if config.repo_name == 'GitHub' -%}
+                                        <i class="fa fa-github"></i> {{ config.repo_name }}
+                                    {%- elif config.repo_name == 'Bitbucket' -%}
+                                        <i class="fa fa-bitbucket"></i> {{ config.repo_name }}
+                                    {%- elif config.repo_name == 'GitLab' -%}
+                                        <i class="fa fa-gitlab"></i> {{ config.repo_name }}
+                                    {%- else -%}
+                                    {{ config.repo_name }}
+                                    {%- endif -%}
+                                </a>
+                            </li>
+                        {%- endif %}
+                      {%- endblock %}
+                    </ul>
+                </div>
+            </div>
+        </div>
+
+        <div class="container">
+            <div class="row">
+                {%- block content %}
+                    <div class="col-md-3">{% include "toc.html" %}</div>
+                    <div class="col-md-9" role="main">{% include "content.html" %}</div>
+                {%- endblock %}
+            </div>
+        </div>
+
+        <footer class="col-md-12">
+          {%- block footer %}
+            <hr>
+            {%- if config.copyright %}
+                <p>{{ config.copyright }}</p>
+            {%- endif %}
+            <p>{% trans mkdocs_link='<a href="https://www.mkdocs.org/">MkDocs</a>' %}Documentation built with {{ mkdocs_link }}.{% endtrans %}</p>
+          {%- endblock %}
+        </footer>
+
+      {%- block scripts %}
+        <script>
+            var base_url = {{ base_url | tojson }},
+                shortcuts = {{ config.theme.shortcuts | tojson }};
+        </script>
+        <script src="{{ 'js/base.js'|url }}" defer></script>
+        {%- for path in extra_javascript %}
+        <script src="{{ path }}" defer></script>
+        {%- endfor %}
+      {%- endblock %}
+
+        {% if 'search' in config['plugins'] %}{%- include "search-modal.html" %}{% endif %}
+        {%- include "keyboard-modal.html" %}
+
+    </body>
+</html>
+{% if page and page.is_homepage %}
+<!--
+MkDocs version : {{ mkdocs_version }}
+Build Date UTC : {{ build_date_utc }}
+-->
+{% endif %}

ghcup.cabal

@@ -1,34 +1,32 @@
-cabal-version:   3.0
-name:            ghcup
-version:         0.1.16.2
-license:         LGPL-3.0-only
-license-file:    LICENSE
-copyright:       Julian Ospald 2020
-maintainer:      hasufell@posteo.de
-author:          Julian Ospald
-homepage:        https://gitlab.haskell.org/haskell/ghcup-hs
-bug-reports:     https://gitlab.haskell.org/haskell/ghcup-hs/issues
-synopsis:        ghc toolchain installer
+cabal-version:      3.0
+name:               ghcup
+version:            0.1.17.2
+license:            LGPL-3.0-only
+license-file:       LICENSE
+copyright:          Julian Ospald 2020
+maintainer:         hasufell@posteo.de
+author:             Julian Ospald
+homepage:           https://gitlab.haskell.org/haskell/ghcup-hs
+bug-reports:        https://gitlab.haskell.org/haskell/ghcup-hs/issues
+synopsis:           ghc toolchain installer
 description:
   A rewrite of the shell script ghcup, for providing
   a more stable user experience and exposing an API.
 
-category:        System
-build-type:      Simple
+category:           System
+build-type:         Simple
 extra-doc-files:
-  README.md
-  docs/CHANGELOG.md
-  docs/HACKING.md
-  docs/RELEASING.md
   data/config.yaml
   data/metadata/ghcup-0.0.4.yaml
   data/metadata/ghcup-0.0.5.yaml
   data/metadata/ghcup-0.0.6.yaml
-  data/metadata/ghcup-0.0.7.yaml
+  CHANGELOG.md
+  README.md
 
 extra-source-files:
-  data/build_mk/default
   data/build_mk/cross
+  data/build_mk/default
+  test/golden/GHCupInfo.json
 
 source-repository head
   type:     git
@@ -94,15 +92,15 @@ library
     -fwarn-incomplete-record-updates
 
   build-depends:
-    , aeson                 >=1.4        && <1.6
+    , aeson                 >=1.4
     , async                 >=0.8        && <2.3
     , base                  >=4.13       && <5
     , base16-bytestring     >=0.1.1.6    && <1.1
     , binary                ^>=0.8.6.0
     , bytestring            ^>=0.10
+    , Cabal                 ^>=3.6.2.0
     , case-insensitive      ^>=1.2.1.0
     , casing                ^>=0.1.4.1
-    , concurrent-output     ^>=1.10.11
     , containers            ^>=0.6
     , cryptohash-sha256     ^>=0.11.101.0
     , deepseq               ^>=1.4.4.0
@@ -111,7 +109,8 @@ library
     , filepath              ^>=1.4.2.1
     , haskus-utils-types    ^>=1.5
     , haskus-utils-variant  >=3.0        && <3.2
-    , libarchive            ^>=3.0.0.0
+    , HsYAML-aeson          ^>=0.2.0.0
+    , libarchive            ^>=3.0.3.0
     , lzma-static           ^>=5.2.5.3
     , megaparsec            >=8.0.0      && <9.1
     , mtl                   ^>=2.2
@@ -136,7 +135,6 @@ library
     , vector                ^>=0.12
     , versions              >=4.0.1      && <5.1
     , word8                 ^>=0.1.3
-    , HsYAML-aeson          ^>=0.2.0.0
     , zlib                  ^>=0.6.2.2
 
   if (flag(internal-downloader) && !os(windows))
@@ -158,7 +156,11 @@ library
       , Win32    ^>=2.10
 
   else
-    other-modules: GHCup.Utils.File.Posix
+    other-modules:
+      GHCup.Utils.File.Posix
+      System.Console.Terminal.Common
+      System.Console.Terminal.Posix
+
     build-depends:
       , bz2              >=0.5.0.5 && <1.1
       , unix             ^>=2.7
@@ -187,7 +189,7 @@ executable ghcup
     -fwarn-incomplete-record-updates -threaded
 
   build-depends:
-    , aeson                 >=1.4      && <1.6
+    , aeson                 >=1.4
     , aeson-pretty          ^>=0.8.8
     , async                 ^>=2.2.3
     , base                  >=4.13     && <5
@@ -198,7 +200,8 @@ executable ghcup
     , filepath              ^>=1.4.2.1
     , ghcup
     , haskus-utils-variant  >=3.0      && <3.2
-    , libarchive            ^>=3.0.0.0
+    , HsYAML-aeson          ^>=0.2.0.0
+    , libarchive            ^>=3.0.3.0
     , megaparsec            >=8.0.0    && <9.1
     , mtl                   ^>=2.2
     , optparse-applicative  >=0.15.1.0 && <0.17
@@ -212,7 +215,6 @@ executable ghcup
     , uri-bytestring        ^>=0.3.2.2
     , utf8-string           ^>=1.0
     , versions              >=4.0.1    && <5.1
-    , HsYAML-aeson          ^>=0.2.0.0
 
   if flag(internal-downloader)
     cpp-options: -DINTERNAL_DOWNLOADER
@@ -260,7 +262,8 @@ executable ghcup-gen
     , filepath              ^>=1.4.2.1
     , ghcup
     , haskus-utils-variant  >=3.0      && <3.2
-    , libarchive            ^>=3.0.0.0
+    , HsYAML-aeson          ^>=0.2.0.0
+    , libarchive            ^>=3.0.3.0
     , mtl                   ^>=2.2
     , optics                ^>=0.4
     , optparse-applicative  >=0.15.1.0 && <0.17
@@ -272,7 +275,6 @@ executable ghcup-gen
     , text                  ^>=1.2.4.0
     , transformers          ^>=0.5
     , versions              >=4.0.1    && <5.1
-    , HsYAML-aeson          ^>=0.2.0.0
 
 test-suite ghcup-test
   type:               exitcode-stdio-1.0

lib/GHCup/Download.hs

@@ -35,6 +35,7 @@ import           GHCup.Types.Optics
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.Dirs
 import           GHCup.Utils.File
+import           GHCup.Utils.Logger
 import           GHCup.Utils.Prelude
 import           GHCup.Version
 
@@ -114,7 +115,7 @@ getDownloadsF :: ( FromJSONKey Tool
                  , MonadMask m
                  )
               => Excepts
-                   '[JSONError , DownloadFailed , FileDoesNotExistError]
+                   '[DigestError, GPGError, JSONError , DownloadFailed , FileDoesNotExistError]
                    m
                    GHCupInfo
 getDownloadsF = do
@@ -165,7 +166,7 @@ getBase :: ( MonadReader env m
            , MonadMask m
            )
         => URI
-        -> Excepts '[JSONError, FileDoesNotExistError] m GHCupInfo
+        -> Excepts '[GPGError, DigestError, JSONError, FileDoesNotExistError] m GHCupInfo
 getBase uri = do
   Settings { noNetwork, downloader } <- lift getSettings
 
@@ -176,7 +177,6 @@ getBase uri = do
            then pure Nothing
            else handleIO (\e -> lift (warnCache (displayException e) downloader) >> pure Nothing)
                . catchE @_ @_ @'[] (\e@(DownloadFailed _) -> lift (warnCache (prettyShow e) downloader) >> pure Nothing)
-               . reThrowAll @_ @_ @'[DownloadFailed] DownloadFailed
                . fmap Just
                . smartDl
                $ uri
@@ -234,6 +234,7 @@ getBase uri = do
           -> Excepts
                '[ DownloadFailed
                 , DigestError
+                , GPGError
                 ]
                m1
                FilePath
@@ -245,7 +246,7 @@ getBase uri = do
     Dirs { cacheDir } <- lift getDirs
 
        -- for local files, let's short-circuit and ignore access time
-    if | scheme == "file" -> liftE $ download uri' Nothing cacheDir Nothing True
+    if | scheme == "file" -> liftE $ download uri' Nothing Nothing cacheDir Nothing True
        | e -> do
           accessTime <- liftIO $ getAccessTime json_file
 
@@ -258,7 +259,7 @@ getBase uri = do
    where
     dlWithMod modTime json_file = do
       let (dir, fn) = splitFileName json_file
-      f <- liftE $ download uri' Nothing dir (Just fn) True
+      f <- liftE $ download uri' (Just $ over pathL' (<> ".sig") uri') Nothing dir (Just fn) True
       liftIO $ setModificationTime f modTime
       liftIO $ setAccessTime f modTime
       pure f
@@ -322,16 +323,17 @@ download :: ( MonadReader env m
             , MonadIO m
             )
          => URI
+         -> Maybe URI         -- ^ URI for gpg sig
          -> Maybe T.Text      -- ^ expected hash
          -> FilePath          -- ^ destination dir (ignored for file:// scheme)
          -> Maybe FilePath    -- ^ optional filename
          -> Bool              -- ^ whether to read an write etags
-         -> Excepts '[DigestError , DownloadFailed] m FilePath
-download uri eDigest dest mfn etags
+         -> Excepts '[DigestError , DownloadFailed, GPGError] m FilePath
+download uri gpgUri eDigest dest mfn etags
   | scheme == "https" = dl
   | scheme == "http"  = dl
   | scheme == "file"  = do
-      let destFile' = T.unpack . decUTF8Safe $ path
+      let destFile' = T.unpack . decUTF8Safe $ view pathL' uri
       lift $ logDebug $ "using local file: " <> T.pack destFile'
       forM_ eDigest (liftE . flip checkDigest destFile')
       pure destFile'
@@ -340,115 +342,179 @@ download uri eDigest dest mfn etags
  where
   scheme = view (uriSchemeL' % schemeBSL') uri
   dl = do
-    destFile <- liftE . reThrowAll @_ @_ @'[DownloadFailed] DownloadFailed $ getDestFile
-    lift $ logInfo $ "downloading: " <> uri' <> " as file " <> T.pack destFile
+    baseDestFile <- liftE . reThrowAll @_ @_ @'[DownloadFailed] DownloadFailed $ getDestFile uri mfn
+    lift $ logInfo $ "downloading: " <> (decUTF8Safe . serializeURIRef') uri <> " as file " <> T.pack baseDestFile
 
     -- destination dir must exist
     liftIO $ createDirRecursive' dest
 
+
     -- download
     flip onException
-         (lift $ hideError doesNotExistErrorType $ recycleFile destFile)
-     $ catchAllE @_ @'[ProcessError, DownloadFailed, UnsupportedScheme]
-          (\e ->
-            lift (hideError doesNotExistErrorType $ recycleFile destFile)
-              >> (throwE . DownloadFailed $ e)
+         (lift $ hideError doesNotExistErrorType $ recycleFile (tmpFile baseDestFile))
+     $ catchAllE @_ @'[GPGError, ProcessError, DownloadFailed, UnsupportedScheme, DigestError] @'[DigestError, DownloadFailed, GPGError]
+          (\e' -> do
+            lift $ hideError doesNotExistErrorType $ recycleFile (tmpFile baseDestFile)
+            case e' of
+              V e@GPGError {} -> throwE e
+              V e@DigestError {} -> throwE e
+              _ -> throwE (DownloadFailed e')
           ) $ do
-              Settings{ downloader, noNetwork } <- lift getSettings
+              Settings{ downloader, noNetwork, gpgSetting } <- lift getSettings
               when noNetwork $ throwE (DownloadFailed (V NoNetwork :: V '[NoNetwork]))
-              case downloader of
-                Curl -> do
-                  o' <- liftIO getCurlOpts
-                  if etags
-                    then do
-                      dh <- liftIO $ emptySystemTempFile "curl-header"
-                      flip finally (try @_ @SomeException $ rmFile dh) $
-                        flip finally (try @_ @SomeException $ rmFile (destFile <.> "tmp")) $ do
-                          metag <- lift $ readETag destFile
-                          liftE $ lEM @_ @'[ProcessError] $ exec "curl"
-                              (o' ++ (if etags then ["--dump-header", dh] else [])
-                                  ++ maybe [] (\t -> ["-H", "If-None-Match: " <> T.unpack t]) metag
-                                  ++ ["-fL", "-o", destFile <.> "tmp", T.unpack uri']) Nothing Nothing
-                          headers <- liftIO $ T.readFile dh
-
-                          -- this nonsense is necessary, because some older versions of curl would overwrite
-                          -- the destination file when 304 is returned
-                          case fmap T.words . listToMaybe . fmap T.strip . T.lines . getLastHeader $ headers of
-                            Just (http':sc:_)
-                              | sc == "304"
-                              , T.pack "HTTP" `T.isPrefixOf` http' -> lift $ logDebug "Status code was 304, not overwriting"
-                              | T.pack "HTTP" `T.isPrefixOf` http' -> do
-                                  lift $ logDebug $ "Status code was " <> sc <> ", overwriting"
-                                  liftIO $ copyFile (destFile <.> "tmp") destFile
-                            _ -> liftE $ throwE @_ @'[DownloadFailed] (DownloadFailed (toVariantAt @0 (MalformedHeaders headers)
-                              :: V '[MalformedHeaders]))
-
-                          lift $ writeEtags destFile (parseEtags headers)
-                    else
-                      liftE $ lEM @_ @'[ProcessError] $ exec "curl" 
-                        (o' ++ ["-fL", "-o", destFile, T.unpack uri']) Nothing Nothing
-                Wget -> do
-                  destFileTemp <- liftIO $ emptySystemTempFile "wget-tmp"
-                  flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
-                    o' <- liftIO getWgetOpts
-                    if etags
-                      then do
-                        metag <- lift $ readETag destFile
-                        let opts = o' ++ maybe [] (\t -> ["--header", "If-None-Match: " <> T.unpack t]) metag
-                                      ++ ["-q", "-S", "-O", destFileTemp , T.unpack uri']
-                        CapturedProcess {_exitCode, _stdErr} <- lift $ executeOut "wget" opts Nothing
-                        case _exitCode of
-                          ExitSuccess -> do
-                            liftIO $ copyFile destFileTemp destFile
-                            lift $ writeEtags destFile (parseEtags (decUTF8Safe' _stdErr))
-                          ExitFailure i'
-                            | i' == 8
-                            , Just _ <- find (T.pack "304 Not Modified" `T.isInfixOf`) . T.lines . decUTF8Safe' $ _stdErr
-                                     -> do
-                                          lift $ logDebug "Not modified, skipping download"
-                                          lift $ writeEtags destFile (parseEtags (decUTF8Safe' _stdErr))
-                            | otherwise -> throwE (NonZeroExit i' "wget" opts)
-                      else do
-                        let opts = o' ++ ["-O", destFileTemp , T.unpack uri']
-                        liftE $ lEM @_ @'[ProcessError] $ exec "wget" opts Nothing Nothing
-                        liftIO $ copyFile destFileTemp destFile
+              downloadAction <- case downloader of
+                    Curl -> do
+                      o' <- liftIO getCurlOpts
+                      if etags
+                        then pure $ curlEtagsDL o'
+                        else pure $ curlDL o'
+                    Wget -> do
+                      o' <- liftIO getWgetOpts
+                      if etags
+                        then pure $ wgetEtagsDL o'
+                        else pure $ wgetDL o'
 #if defined(INTERNAL_DOWNLOADER)
-                Internal -> do
-                  (https, host, fullPath, port) <- liftE $ uriToQuadruple uri
-                  if etags
-                    then do
-                      metag <- lift $ readETag destFile
-                      let addHeaders = maybe mempty (\etag -> M.fromList [ (mk . E.encodeUtf8 . T.pack $ "If-None-Match"
-                                                                         , E.encodeUtf8 etag)]) metag
-                      liftE
-                        $ catchE @HTTPNotModified @'[DownloadFailed] @'[] (\(HTTPNotModified etag) -> lift $ writeEtags destFile (pure $ Just etag))
-                        $ do
-                          r <- downloadToFile https host fullPath port destFile addHeaders
-                          lift $ writeEtags destFile (pure $ decUTF8Safe <$> getHeader r "etag")
-                    else void $ liftE $ catchE @HTTPNotModified
-                                        @'[DownloadFailed]
-                                   (\e@(HTTPNotModified _) ->
-                                     throwE @_ @'[DownloadFailed] (DownloadFailed (toVariantAt @0 e :: V '[HTTPNotModified])))
-                               $ downloadToFile https host fullPath port destFile mempty
+                    Internal -> do
+                      if etags
+                        then pure (\fp -> liftE . internalEtagsDL fp)
+                        else pure (\fp -> liftE . internalDL fp)
 #endif
+              liftE $ downloadAction baseDestFile uri
+              case (gpgUri, gpgSetting) of
+                (_, GPGNone) -> pure ()
+                (Just gpgUri', _) -> do
+                  gpgDestFile <- liftE . reThrowAll @_ @_ @'[DownloadFailed] DownloadFailed $ getDestFile gpgUri' Nothing
+                  liftE $ flip onException
+                       (lift $ hideError doesNotExistErrorType $ recycleFile (tmpFile gpgDestFile))
+                   $ catchAllE @_ @'[GPGError, ProcessError, UnsupportedScheme, DownloadFailed] @'[GPGError]
+                        (\e -> if gpgSetting == GPGStrict then throwE (GPGError e) else lift $ logWarn $ T.pack (prettyShow (GPGError e))
+                        ) $ do
+                      o' <- liftIO getGpgOpts
+                      lift $ logDebug $ "downloading: " <> (decUTF8Safe . serializeURIRef') gpgUri' <> " as file " <> T.pack gpgDestFile
+                      liftE $ downloadAction gpgDestFile gpgUri'
+                      lift $ logInfo $ "verifying signature of: " <> T.pack baseDestFile
+                      let args = o' ++ ["--batch", "--verify", "--quiet", "--no-tty", gpgDestFile, baseDestFile]
+                      cp <- lift $ executeOut "gpg" args Nothing
+                      case cp of
+                        CapturedProcess { _exitCode = ExitFailure i, _stdErr } -> do
+                          lift $ logDebug $ decUTF8Safe' _stdErr
+                          throwE (GPGError @'[ProcessError] (V (NonZeroExit i "gpg" args)))
+                        CapturedProcess { _stdErr } -> lift $ logDebug $ decUTF8Safe' _stdErr
+                _ -> pure ()
 
-    forM_ eDigest (liftE . flip checkDigest destFile)
-    pure destFile
+              forM_ eDigest (liftE . flip checkDigest baseDestFile)
+    pure baseDestFile
+
+  curlDL :: (MonadCatch m, MonadMask m, MonadIO m) => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+  curlDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
+    let destFileTemp = tmpFile destFile
+    flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
+      liftE $ lEM @_ @'[ProcessError] $ exec "curl"
+        (o' ++ ["-fL", "-o", destFileTemp, T.unpack uri']) Nothing Nothing
+      liftIO $ renameFile destFileTemp destFile
+
+  curlEtagsDL :: (MonadReader env m, HasLog env, MonadCatch m, MonadMask m, MonadIO m)
+              => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+  curlEtagsDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
+    let destFileTemp = tmpFile destFile
+    dh <- liftIO $ emptySystemTempFile "curl-header"
+    flip finally (try @_ @SomeException $ rmFile dh) $
+      flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
+        metag <- lift $ readETag destFile
+        liftE $ lEM @_ @'[ProcessError] $ exec "curl"
+            (o' ++ (if etags then ["--dump-header", dh] else [])
+                ++ maybe [] (\t -> ["-H", "If-None-Match: " <> T.unpack t]) metag
+                ++ ["-fL", "-o", destFileTemp, T.unpack uri']) Nothing Nothing
+        headers <- liftIO $ T.readFile dh
+
+        -- this nonsense is necessary, because some older versions of curl would overwrite
+        -- the destination file when 304 is returned
+        case fmap T.words . listToMaybe . fmap T.strip . T.lines . getLastHeader $ headers of
+          Just (http':sc:_)
+            | sc == "304"
+            , T.pack "HTTP" `T.isPrefixOf` http' -> lift $ logDebug "Status code was 304, not overwriting"
+            | T.pack "HTTP" `T.isPrefixOf` http' -> do
+                lift $ logDebug $ "Status code was " <> sc <> ", overwriting"
+                liftIO $ renameFile destFileTemp destFile
+          _ -> liftE $ throwE @_ @'[DownloadFailed] (DownloadFailed (toVariantAt @0 (MalformedHeaders headers)
+            :: V '[MalformedHeaders]))
+
+        lift $ writeEtags destFile (parseEtags headers)
+
+  wgetDL :: (MonadCatch m, MonadMask m, MonadIO m) => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+  wgetDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
+    let destFileTemp = tmpFile destFile
+    flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
+      let opts = o' ++ ["-O", destFileTemp , T.unpack uri']
+      liftE $ lEM @_ @'[ProcessError] $ exec "wget" opts Nothing Nothing
+      liftIO $ renameFile destFileTemp destFile
+
+
+  wgetEtagsDL :: (MonadReader env m, HasLog env, MonadCatch m, MonadMask m, MonadIO m)
+              => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+  wgetEtagsDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
+    let destFileTemp = tmpFile destFile
+    flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
+      metag <- lift $ readETag destFile
+      let opts = o' ++ maybe [] (\t -> ["--header", "If-None-Match: " <> T.unpack t]) metag
+                    ++ ["-q", "-S", "-O", destFileTemp , T.unpack uri']
+      CapturedProcess {_exitCode, _stdErr} <- lift $ executeOut "wget" opts Nothing
+      case _exitCode of
+        ExitSuccess -> do
+          liftIO $ renameFile destFileTemp destFile
+          lift $ writeEtags destFile (parseEtags (decUTF8Safe' _stdErr))
+        ExitFailure i'
+          | i' == 8
+          , Just _ <- find (T.pack "304 Not Modified" `T.isInfixOf`) . T.lines . decUTF8Safe' $ _stdErr
+                   -> do
+                        lift $ logDebug "Not modified, skipping download"
+                        lift $ writeEtags destFile (parseEtags (decUTF8Safe' _stdErr))
+          | otherwise -> throwE (NonZeroExit i' "wget" opts)
+
+#if defined(INTERNAL_DOWNLOADER)
+  internalDL :: (MonadCatch m, MonadMask m, MonadIO m)
+             => FilePath -> URI -> Excepts '[DownloadFailed, UnsupportedScheme] m ()
+  internalDL destFile uri' = do
+    let destFileTemp = tmpFile destFile
+    flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
+      (https, host, fullPath, port) <- liftE $ uriToQuadruple uri'
+      void $ liftE $ catchE @HTTPNotModified
+                 @'[DownloadFailed]
+            (\e@(HTTPNotModified _) ->
+              throwE @_ @'[DownloadFailed] (DownloadFailed (toVariantAt @0 e :: V '[HTTPNotModified])))
+        $ downloadToFile https host fullPath port destFileTemp mempty
+      liftIO $ renameFile destFileTemp destFile
+
+
+  internalEtagsDL :: (MonadReader env m, HasLog env, MonadCatch m, MonadMask m, MonadIO m)
+                  => FilePath -> URI -> Excepts '[DownloadFailed, UnsupportedScheme] m ()
+  internalEtagsDL destFile uri' = do
+    let destFileTemp = tmpFile destFile
+    flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
+      (https, host, fullPath, port) <- liftE $ uriToQuadruple uri'
+      metag <- lift $ readETag destFile
+      let addHeaders = maybe mempty (\etag -> M.fromList [ (mk . E.encodeUtf8 . T.pack $ "If-None-Match"
+                                                         , E.encodeUtf8 etag)]) metag
+      liftE
+        $ catchE @HTTPNotModified @'[DownloadFailed] @'[] (\(HTTPNotModified etag) -> lift $ writeEtags destFile (pure $ Just etag))
+        $ do
+          r <- downloadToFile https host fullPath port destFileTemp addHeaders
+          liftIO $ renameFile destFileTemp destFile
+          lift $ writeEtags destFile (pure $ decUTF8Safe <$> getHeader r "etag")
+#endif
 
 
   -- Manage to find a file we can write the body into.
-  getDestFile :: Monad m => Excepts '[NoUrlBase] m FilePath
-  getDestFile = 
-    case mfn of
+  getDestFile :: Monad m => URI -> Maybe FilePath -> Excepts '[NoUrlBase] m FilePath
+  getDestFile uri' mfn' = 
+    let path = view pathL' uri'
+    in case mfn' of
         Just fn -> pure (dest </> fn)
         Nothing
           | let urlBase = T.unpack (decUTF8Safe (urlBaseName path))
           , not (null urlBase) -> pure (dest </> urlBase)
           -- TODO: remove this once we use hpath again
-          | otherwise -> throwE $ NoUrlBase uri'
-
-  path = view pathL' uri
-  uri' = decUTF8Safe (serializeURIRef' uri)
+          | otherwise -> throwE $ NoUrlBase (decUTF8Safe . serializeURIRef' $ uri')
 
   parseEtags :: (MonadReader env m, HasLog env, MonadIO m, MonadThrow m) => T.Text -> m (Maybe T.Text)
   parseEtags stderr = do
@@ -509,14 +575,14 @@ downloadCached :: ( MonadReader env m
                   )
                => DownloadInfo
                -> Maybe FilePath  -- ^ optional filename
-               -> Excepts '[DigestError , DownloadFailed] m FilePath
+               -> Excepts '[DigestError , DownloadFailed, GPGError] m FilePath
 downloadCached dli mfn = do
   Settings{ cache } <- lift getSettings
   case cache of
     True -> downloadCached' dli mfn Nothing
     False -> do
       tmp <- lift withGHCupTmpDir
-      liftE $ download (_dlUri dli) (Just (_dlHash dli)) tmp mfn False
+      liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) tmp mfn False
 
 
 downloadCached' :: ( MonadReader env m
@@ -531,7 +597,7 @@ downloadCached' :: ( MonadReader env m
                 => DownloadInfo
                 -> Maybe FilePath  -- ^ optional filename
                 -> Maybe FilePath  -- ^ optional destination dir (default: cacheDir)
-                -> Excepts '[DigestError , DownloadFailed] m FilePath
+                -> Excepts '[DigestError , DownloadFailed, GPGError] m FilePath
 downloadCached' dli mfn mDestDir = do
   Dirs { cacheDir } <- lift getDirs
   let destDir = fromMaybe cacheDir mDestDir
@@ -542,7 +608,7 @@ downloadCached' dli mfn mDestDir = do
     | fileExists -> do
       liftE $ checkDigest (view dlHash dli) cachfile
       pure cachfile
-    | otherwise -> liftE $ download (_dlUri dli) (Just (_dlHash dli)) destDir mfn False
+    | otherwise -> liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) destDir mfn False
 
 
 
@@ -571,7 +637,7 @@ checkDigest eDigest file = do
     lift $ logInfo $ "verifying digest of: " <> T.pack p'
     c <- liftIO $ L.readFile file
     cDigest <- throwEither . E.decodeUtf8' . B16.encode . SHA256.hashlazy $ c
-    when ((cDigest /= eDigest) && verify) $ throwE (DigestError cDigest eDigest)
+    when ((cDigest /= eDigest) && verify) $ throwE (DigestError file cDigest eDigest)
 
 
 -- | Get additional curl args from env. This is an undocumented option.
@@ -589,6 +655,12 @@ getWgetOpts =
     Just r  -> pure $ splitOn " " r
     Nothing -> pure []
 
+-- | Get additional gpg args from env. This is an undocumented option.
+getGpgOpts :: IO [String]
+getGpgOpts =
+  lookupEnv "GHCUP_GPG_OPTS" >>= \case
+    Just r  -> pure $ splitOn " " r
+    Nothing -> pure []
 
 -- | Get the url base name.
 --
@@ -610,3 +682,7 @@ urlBaseName = snd . B.breakEnd (== _slash) . urlDecode False
 -- "HTTP/1.1 304 Not Modified\n"
 getLastHeader :: T.Text -> T.Text
 getLastHeader = T.unlines . lastDef [] . filter (\x -> not (null x)) . splitOn [""] . fmap T.stripEnd . T.lines
+
+
+tmpFile :: FilePath -> FilePath
+tmpFile = (<.> "tmp")

lib/GHCup/Errors.hs

@@ -149,6 +149,8 @@ instance Pretty NotInstalled where
 data NotFoundInPATH = NotFoundInPATH FilePath
   deriving Show
 
+instance Exception NotFoundInPATH
+
 instance Pretty NotFoundInPATH where
   pPrint (NotFoundInPATH exe) =
     text $ "The exe " <> exe <> " was not found in PATH."
@@ -188,12 +190,22 @@ instance Pretty TarDirDoesNotExist where
     text "Tar directory does not exist:" <+> pPrint dir
 
 -- | File digest verification failed.
-data DigestError = DigestError Text Text
+data DigestError = DigestError FilePath Text Text
   deriving Show
 
 instance Pretty DigestError where
-  pPrint (DigestError currentDigest expectedDigest) =
-    text "Digest error: expected" <+> text (T.unpack expectedDigest) <+> text "but got" <+> pPrint currentDigest
+  pPrint (DigestError fp currentDigest expectedDigest) =
+    text "Digest error for" <+> text (fp <> ": expected")
+      <+> text (T.unpack expectedDigest) <+> text "but got" <+> pPrint currentDigest <+> text
+      "\nConsider removing the file in case it's cached and try again."
+
+-- | File digest verification failed.
+data GPGError = forall xs . (ToVariantMaybe DownloadFailed xs, PopVariant DownloadFailed xs, Show (V xs), Pretty (V xs)) => GPGError (V xs)
+
+deriving instance Show GPGError
+
+instance Pretty GPGError where
+  pPrint (GPGError reason) = text "GPG verify failed:" <+> pPrint reason
 
 -- | Unexpected HTTP status.
 data HTTPStatusError = HTTPStatusError Int (M.Map (CI ByteString) ByteString)

lib/GHCup/Platform.hs

@@ -23,6 +23,7 @@ import           GHCup.Types
 import           GHCup.Types.Optics
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.File
+import           GHCup.Utils.Logger
 import           GHCup.Utils.Prelude
 import           GHCup.Utils.String.QQ
 
@@ -138,7 +139,6 @@ getLinuxDistro = do
         | hasWord name ["exherbo"] -> Exherbo
         | hasWord name ["gentoo"]  -> Gentoo
         | hasWord name ["amazonlinux", "Amazon Linux"] -> AmazonLinux
-        | hasWord name ["solus"]   -> Solus
         | otherwise                -> UnknownLinux
   pure (distro, parsedVer)
  where

lib/GHCup/Requirements.hs

@@ -60,9 +60,10 @@ getCommonRequirements pr tr =
 prettyRequirements :: Requirements -> T.Text
 prettyRequirements Requirements {..} =
   let d = if not . null $ _distroPKGs
-        then
-          "\n  Please install the following distro packages: "
-            <> T.intercalate " " _distroPKGs
+        then "\n  Please ensure the following distro packages "
+          <> "are installed before continuing (you can exit ghcup "
+          <> "and return at any time): "
+          <> T.intercalate " " _distroPKGs
         else ""
       n = if not . T.null $ _notes then "\n  Note: " <> _notes else ""
   in  "System requirements " <> d <> n

lib/GHCup/Types.hs

@@ -223,7 +223,6 @@ data LinuxDistro = Debian
                  | RedHat
                  | Alpine
                  | AmazonLinux
-                 | Solus
                  -- rolling
                  | Gentoo
                  | Exherbo
@@ -243,7 +242,6 @@ distroToString CentOS = "centos"
 distroToString RedHat = "redhat"
 distroToString Alpine = "alpine"
 distroToString AmazonLinux = "amazon"
-distroToString Solus = "solus"
 distroToString Gentoo = "gentoo"
 distroToString Exherbo = "exherbo"
 distroToString UnknownLinux = "unknown"
@@ -303,11 +301,12 @@ data UserSettings = UserSettings
   , uKeyBindings :: Maybe UserKeyBindings
   , uUrlSource   :: Maybe URLSource
   , uNoNetwork   :: Maybe Bool
+  , uGPGSetting  :: Maybe GPGSetting
   }
   deriving (Show, GHC.Generic)
 
 defaultUserSettings :: UserSettings
-defaultUserSettings = UserSettings Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing
+defaultUserSettings = UserSettings Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing
 
 fromSettings :: Settings -> Maybe KeyBindings -> UserSettings
 fromSettings Settings{..} Nothing =
@@ -320,6 +319,7 @@ fromSettings Settings{..} Nothing =
     , uNoNetwork = Just noNetwork
     , uKeyBindings = Nothing
     , uUrlSource = Just urlSource
+    , uGPGSetting = Just gpgSetting
   }
 fromSettings Settings{..} (Just KeyBindings{..}) =
   let ukb = UserKeyBindings
@@ -342,6 +342,7 @@ fromSettings Settings{..} (Just KeyBindings{..}) =
     , uNoNetwork = Just noNetwork
     , uKeyBindings = Just ukb
     , uUrlSource = Just urlSource
+    , uGPGSetting = Just gpgSetting
   }
 
 data UserKeyBindings = UserKeyBindings
@@ -415,6 +416,8 @@ data Settings = Settings
   , verbose    :: Bool
   , urlSource  :: URLSource
   , noNetwork  :: Bool
+  , gpgSetting :: GPGSetting
+  , noColor    :: Bool -- this also exists in LoggerConfig
   }
   deriving (Show, GHC.Generic)
 
@@ -448,6 +451,13 @@ data Downloader = Curl
 
 instance NFData Downloader
 
+data GPGSetting = GPGStrict
+                | GPGLax
+                | GPGNone
+  deriving (Eq, Show, Ord, GHC.Generic)
+
+instance NFData GPGSetting
+
 data DebugInfo = DebugInfo
   { diBaseDir  :: FilePath
   , diBinDir   :: FilePath
@@ -567,11 +577,12 @@ data LogLevel = Warn
   deriving (Eq, Ord, Show)
 
 data LoggerConfig = LoggerConfig
-  { lcPrintDebug :: Bool                  -- ^ whether to print debug in colorOutter
-  , colorOutter  :: T.Text -> IO () -- ^ how to write the color output
-  , rawOutter    :: T.Text -> IO () -- ^ how to write the full raw output
+  { lcPrintDebug   :: Bool            -- ^ whether to print debug in colorOutter
+  , consoleOutter  :: T.Text -> IO () -- ^ how to write the console output
+  , fileOutter     :: T.Text -> IO () -- ^ how to write the file output
+  , fancyColors    :: Bool
   }
   deriving Show
 
 instance NFData LoggerConfig where
-  rnf (LoggerConfig !lcPrintDebug !_ !_) = rnf lcPrintDebug
+  rnf (LoggerConfig !lcPrintDebug !_ !_ !fancyColors) = rnf (lcPrintDebug, fancyColors)

lib/GHCup/Types/JSON.hs

@@ -24,11 +24,13 @@ module GHCup.Types.JSON where
 import           GHCup.Types
 import           GHCup.Utils.MegaParsec
 import           GHCup.Utils.Prelude
+import           GHCup.Utils.Logger             () -- TH is broken shite and needs GHCup.Utils.Logger for linking, although we don't depend on the file.
+                                                   -- This is due to the boot file.
 
 import           Control.Applicative            ( (<|>) )
-import           Data.Aeson
+import           Data.Aeson              hiding (Key)
 import           Data.Aeson.TH
-import           Data.Aeson.Types
+import           Data.Aeson.Types        hiding (Key)
 import           Data.List.NonEmpty             ( NonEmpty(..) )
 import           Data.Text.Encoding            as E
 import           Data.Versions
@@ -54,6 +56,7 @@ deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Tool
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''GlobalTool
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''KeepDirs
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Downloader
+deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''GPGSetting
 
 instance ToJSON Tag where
   toJSON Latest             = String "Latest"

lib/GHCup/Types/Optics.hs

@@ -23,12 +23,9 @@ import           GHCup.Types
 
 import           Control.Monad.Reader
 import           Data.ByteString         ( ByteString )
-import           Data.Text               ( Text )
 import           Optics
 import           URI.ByteString
-import           System.Console.Pretty
 
-import qualified Data.Text                     as T
 
 makePrisms ''Tool
 makePrisms ''Architecture
@@ -117,80 +114,6 @@ getDirs :: ( MonadReader env m
 getDirs = gets @"dirs"
 
 
-logInfo :: ( MonadReader env m
-           , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
-           , MonadIO m
-           )
-        => Text
-        -> m ()
-logInfo = logInternal Info
-
-logWarn :: ( MonadReader env m
-           , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
-           , MonadIO m
-           )
-        => Text
-        -> m ()
-logWarn = logInternal Warn
-
-logDebug :: ( MonadReader env m
-            , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
-            , MonadIO m
-            )
-         => Text
-         -> m ()
-logDebug = logInternal Debug
-
-logError :: ( MonadReader env m
-            , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
-            , MonadIO m
-            )
-         => Text
-         -> m ()
-logError = logInternal Error
-
-
-logInternal :: ( MonadReader env m
-               , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
-               , MonadIO m
-               ) => LogLevel
-                 -> Text
-                 -> m ()
-logInternal logLevel msg = do
-  LoggerConfig {..} <- gets @"loggerConfig"
-  let style' = case logLevel of
-        Debug   -> style Bold . color Blue
-        Info    -> style Bold . color Green
-        Warn    -> style Bold . color Yellow
-        Error   -> style Bold . color Red
-  let l = case logLevel of
-        Debug   -> style' "[ Debug ]"
-        Info    -> style' "[ Info  ]"
-        Warn    -> style' "[ Warn  ]"
-        Error   -> style' "[ Error ]"
-  let strs = T.split (== '\n') msg
-  let out = case strs of
-              [] -> T.empty
-              (x:xs) -> 
-                  foldr (\a b -> a <> "\n" <> b) mempty
-                . ((l <> " " <> x) :)
-                . fmap (\line' -> style' "[ ...   ] " <> line' )
-                $ xs
-
-  when (lcPrintDebug || (not lcPrintDebug && (logLevel /= Debug)))
-    $ liftIO $ colorOutter out
-
-  -- raw output
-  let lr = case logLevel of
-        Debug   -> "Debug:"
-        Info    -> "Info:"
-        Warn    -> "Warn:"
-        Error   -> "Error:"
-  let outr = lr <> " " <> msg <> "\n"
-  liftIO $ rawOutter outr
-
-
-
 getLogCleanup :: ( MonadReader env m
                  , LabelOptic' "logCleanup" A_Lens env (IO ())
                  )

lib/GHCup/Utils.hs

@@ -35,6 +35,7 @@ import           GHCup.Types.Optics
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.Dirs
 import           GHCup.Utils.File
+import           GHCup.Utils.Logger
 import           GHCup.Utils.MegaParsec
 import           GHCup.Utils.Prelude
 import           GHCup.Utils.String.QQ
@@ -73,7 +74,6 @@ import           System.Win32.Console
 import           System.Win32.File     hiding ( copyFile )
 import           System.Win32.Types
 #endif
-import           Text.PrettyPrint.HughesPJClass hiding ( (<>) )
 import           Text.Regex.Posix
 import           URI.ByteString
 
@@ -85,8 +85,37 @@ import qualified Data.Map.Strict               as Map
 import qualified Data.Text                     as T
 import qualified Data.Text.Encoding            as E
 import qualified Text.Megaparsec               as MP
+import qualified Data.List.NonEmpty            as NE
 
 
+-- $setup
+-- >>> :set -XOverloadedStrings
+-- >>> :set -XDataKinds
+-- >>> :set -XTypeApplications
+-- >>> :set -XQuasiQuotes
+-- >>> import System.Directory
+-- >>> import URI.ByteString
+-- >>> import qualified Data.Text as T
+-- >>> import GHCup.Utils.Prelude
+-- >>> import GHCup.Download
+-- >>> import GHCup.Version
+-- >>> import GHCup.Errors
+-- >>> import GHCup.Types
+-- >>> import GHCup.Types.Optics
+-- >>> import Optics
+-- >>> import GHCup.Utils.Version.QQ
+-- >>> import qualified Data.Text.Encoding as E
+-- >>> import Control.Monad.Reader
+-- >>> import Haskus.Utils.Variant.Excepts
+-- >>> import Text.PrettyPrint.HughesPJClass ( prettyShow )
+-- >>> let lc = LoggerConfig { lcPrintDebug = False, consoleOutter = mempty, fileOutter = mempty, fancyColors = False }
+-- >>> dirs' <- getAllDirs
+-- >>> let installedVersions = [ ([pver|8.10.7|], Nothing), ([pver|8.10.4|], Nothing), ([pver|8.8.4|], Nothing), ([pver|8.8.3|], Nothing) ]
+-- >>> let settings = Settings True False Never Curl False GHCupURL True GPGNone False
+-- >>> let leanAppState = LeanAppState settings dirs' defaultKeyBindings lc
+-- >>> cwd <- getCurrentDirectory
+-- >>> (Right ref) <- pure $ parseURI strictURIParserOptions $ "file://" <> E.encodeUtf8 (T.pack cwd) <> "/data/metadata/" <> (urlBaseName . view pathL' $ ghcupURL)
+-- >>> (VRight r) <- (fmap . fmap) _ghcupDownloads $ flip runReaderT leanAppState . runE @'[DigestError, GPGError, JSONError , DownloadFailed , FileDoesNotExistError] $ liftE $ getBase ref
 
 
 
@@ -250,7 +279,6 @@ getInstalledGHCs = do
 -- | Get all installed cabals, by matching on @~\/.ghcup\/bin/cabal-*@.
 getInstalledCabals :: ( MonadReader env m
                       , HasDirs env
-                      , HasLog env
                       , MonadIO m
                       , MonadCatch m
                       )
@@ -268,7 +296,7 @@ getInstalledCabals = do
 
 
 -- | Whether the given cabal version is installed.
-cabalInstalled :: (HasLog env, MonadIO m, MonadReader env m, HasDirs env, MonadCatch m) => Version -> m Bool
+cabalInstalled :: (MonadIO m, MonadReader env m, HasDirs env, MonadCatch m) => Version -> m Bool
 cabalInstalled ver = do
   vers <- fmap rights getInstalledCabals
   pure $ elem ver vers
@@ -463,33 +491,50 @@ hlsGHCVersions :: ( MonadReader env m
                   )
                => m [Version]
 hlsGHCVersions = do
-  h                             <- hlsSet
-  vers                          <- forM h $ \h' -> do
-    bins <- hlsServerBinaries h'
-    pure $ fmap
-      (version
-        . T.pack
-        . fromJust
-        . stripPrefix "haskell-language-server-"
-        . head
-        . splitOn "~"
-        )
-      bins
-  pure . rights . concat . maybeToList $ vers
+  h <- hlsSet
+  fromMaybe [] <$> forM h hlsGHCVersions'
+
+
+hlsGHCVersions' :: ( MonadReader env m
+                   , HasDirs env
+                   , MonadIO m
+                   , MonadThrow m
+                   , MonadCatch m
+                   )
+                => Version
+                -> m [Version]
+hlsGHCVersions' v' = do
+  bins <- hlsServerBinaries v' Nothing
+  let vers = fmap
+        (version
+          . T.pack
+          . fromJust
+          . stripPrefix "haskell-language-server-"
+          . head
+          . splitOn "~"
+          )
+        bins
+  pure . sortBy (flip compare) . rights $ vers
 
 
 -- | Get all server binaries for an hls version, if any.
 hlsServerBinaries :: (MonadReader env m, HasDirs env, MonadIO m)
                   => Version
+                  -> Maybe Version   -- ^ optional GHC version
                   -> m [FilePath]
-hlsServerBinaries ver = do
+hlsServerBinaries ver mghcVer = do
   Dirs {..}  <- getDirs
   liftIO $ handleIO (\_ -> pure []) $ findFiles
     binDir
     (makeRegexOpts
       compExtended
       execBlank
-      ([s|^haskell-language-server-.*~|] <> escapeVerRex ver <> E.encodeUtf8 (T.pack exeExt) <> [s|$|] :: ByteString
+      ([s|^haskell-language-server-|]
+        <> maybe [s|.*|] escapeVerRex mghcVer
+        <> [s|~|]
+        <> escapeVerRex ver
+        <> E.encodeUtf8 (T.pack exeExt)
+        <> [s|$|] :: ByteString
       )
     )
 
@@ -518,7 +563,7 @@ hlsWrapperBinary ver = do
 -- | Get all binaries for an hls version, if any.
 hlsAllBinaries :: (MonadReader env m, HasDirs env, MonadIO m, MonadThrow m) => Version -> m [FilePath]
 hlsAllBinaries ver = do
-  hls     <- hlsServerBinaries ver
+  hls     <- hlsServerBinaries ver Nothing
   wrapper <- hlsWrapperBinary ver
   pure (maybeToList wrapper ++ hls)
 
@@ -559,34 +604,83 @@ matchMajor v' major' minor' = case getMajorMinorV v' of
   Just (x, y) -> x == major' && y == minor'
   Nothing     -> False
 
+-- | Match PVP prefix.
+--
+-- >>> matchPVPrefix [pver|8.8|] [pver|8.8.4|]
+-- True
+-- >>> matchPVPrefix [pver|8|] [pver|8.8.4|]
+-- True
+-- >>> matchPVPrefix [pver|8.10|] [pver|8.8.4|]
+-- False
+-- >>> matchPVPrefix [pver|8.10|] [pver|8.10.7|]
+-- True
+matchPVPrefix :: PVP -> PVP -> Bool
+matchPVPrefix (toL -> prefix) (toL -> full) = and $ zipWith (==) prefix full
 
--- | Get the latest installed full GHC version that satisfies X.Y.
--- This reads `ghcupGHCBaseDir`.
-getGHCForMajor :: (MonadReader env m, HasDirs env, MonadIO m, MonadThrow m)
-               => Int        -- ^ major version component
-               -> Int        -- ^ minor version component
-               -> Maybe Text -- ^ the target triple
-               -> m (Maybe GHCTargetVersion)
-getGHCForMajor major' minor' mt = do
+toL :: PVP -> [Int]
+toL (PVP inner) = fmap fromIntegral $ NE.toList inner
+
+
+-- | Get the latest installed full GHC version that satisfies the given (possibly partial)
+-- PVP version.
+getGHCForPVP :: (MonadReader env m, HasDirs env, MonadIO m, MonadThrow m)
+             => PVP
+             -> Maybe Text -- ^ the target triple
+             -> m (Maybe GHCTargetVersion)
+getGHCForPVP pvpIn mt = do
   ghcs <- rights <$> getInstalledGHCs
+  -- we're permissive here... failed parse just means we have no match anyway
+  let ghcs' = catMaybes $ flip fmap ghcs $ \GHCTargetVersion{..} -> do
+        pvp_ <- versionToPVP _tvVersion
+        pure (pvp_, _tvTarget)
 
-  pure
-    . lastMay
-    . sortBy (\x y -> compare (_tvVersion x) (_tvVersion y))
-    . filter
-        (\GHCTargetVersion {..} ->
-          _tvTarget == mt && matchMajor _tvVersion major' minor'
-        )
-    $ ghcs
+  getGHCForPVP' pvpIn ghcs' mt
+
+-- | Like 'getGHCForPVP', except with explicit input parameter.
+--
+-- >>> fmap prettyShow $ getGHCForPVP' [pver|8|] installedVersions Nothing
+-- "Just 8.10.7"
+-- >>> fmap prettyShow $ getGHCForPVP' [pver|8.8|] installedVersions Nothing
+-- "Just 8.8.4"
+-- >>> fmap prettyShow $ getGHCForPVP' [pver|8.10.4|] installedVersions Nothing
+-- "Just 8.10.4"
+getGHCForPVP' :: MonadThrow m
+             => PVP
+             -> [(PVP, Maybe Text)] -- ^ installed GHCs
+             -> Maybe Text          -- ^ the target triple
+             -> m (Maybe GHCTargetVersion)
+getGHCForPVP' pvpIn ghcs' mt = do
+  let mResult = lastMay
+                  . sortBy (\(x, _) (y, _) -> compare x y)
+                  . filter
+                      (\(pvp_, target) ->
+                        target == mt && matchPVPrefix pvp_ pvpIn
+                      )
+                  $ ghcs'
+  forM mResult $ \(pvp_, target) -> do
+    ver' <- pvpToVersion pvp_
+    pure (GHCTargetVersion target ver')
 
 
--- | Get the latest available ghc for X.Y major version.
-getLatestGHCFor :: Int -- ^ major version component
-                -> Int -- ^ minor version component
-                -> GHCupDownloads
-                -> Maybe (Version, VersionInfo)
-getLatestGHCFor major' minor' dls =
-  preview (ix GHC % to Map.toDescList) dls >>= lastMay . filter (\(v, _) -> matchMajor v major' minor')
+-- | Get the latest available ghc for the given PVP version, which
+-- may only contain parts.
+--
+-- >>> (fmap . fmap) fst $ getLatestToolFor GHC [pver|8|] r
+-- Just (PVP {_pComponents = 8 :| [10,7]})
+-- >>> (fmap . fmap) fst $ getLatestToolFor GHC [pver|8.8|] r
+-- Just (PVP {_pComponents = 8 :| [8,4]})
+-- >>> (fmap . fmap) fst $ getLatestToolFor GHC [pver|8.8.4|] r
+-- Just (PVP {_pComponents = 8 :| [8,4]})
+getLatestToolFor :: MonadThrow m
+                 => Tool
+                 -> PVP
+                 -> GHCupDownloads
+                 -> m (Maybe (PVP, VersionInfo))
+getLatestToolFor tool pvpIn dls = do
+  let ls = fromMaybe [] $ preview (ix tool % to Map.toDescList) dls
+  let ps = catMaybes $ fmap (\(v, vi) -> (,vi) <$> versionToPVP v) ls
+  pure . headMay . filter (\(v, _) -> matchPVPrefix pvpIn v) $ ps
+
 
 
 
@@ -690,11 +784,10 @@ intoSubdir bdir tardir = case tardir of
 -- | Get the tool version that has this tag. If multiple have it,
 -- picks the greatest version.
 getTagged :: Tag
-          -> AffineFold (Map.Map Version VersionInfo) (Version, VersionInfo)
+          -> Fold (Map.Map Version VersionInfo) (Version, VersionInfo)
 getTagged tag =
-  to (Map.filter (\VersionInfo {..} -> tag `elem` _viTags))
-  % to Map.toDescList
-  % _head
+  to (Map.toDescList . Map.filter (\VersionInfo {..} -> tag `elem` _viTags))
+  % folding id
 
 getLatest :: GHCupDownloads -> Tool -> Maybe (Version, VersionInfo)
 getLatest av tool = headOf (ix tool % getTagged Latest) av
@@ -825,48 +918,63 @@ getChangeLog :: GHCupDownloads -> Tool -> Either Version Tag -> Maybe URI
 getChangeLog dls tool (Left v') =
   preview (ix tool % ix v' % viChangeLog % _Just) dls
 getChangeLog dls tool (Right tag) =
-  preview (ix tool % getTagged tag % to snd % viChangeLog % _Just) dls
+  preview (ix tool % pre (getTagged tag) % to snd % viChangeLog % _Just) dls
 
 
 -- | Execute a build action while potentially cleaning up:
 --
 --   1. the build directory, depending on the KeepDirs setting
 --   2. the install destination, depending on whether the build failed
-runBuildAction :: ( Pretty (V e)
-                  , Show (V e)
-                  , PopVariant BuildFailed e
-                  , ToVariantMaybe BuildFailed e
-                  , MonadReader env m
+runBuildAction :: ( MonadReader env m
                   , HasDirs env
                   , HasSettings env
                   , MonadIO m
                   , MonadMask m
                   , HasLog env
                   , MonadUnliftIO m
+                  , MonadFail m
+                  , MonadCatch m
                   )
                => FilePath        -- ^ build directory (cleaned up depending on Settings)
                -> Maybe FilePath  -- ^ dir to *always* clean up on exception
                -> Excepts e m a
-               -> Excepts '[BuildFailed] m a
+               -> Excepts e m a
 runBuildAction bdir instdir action = do
   Settings {..} <- lift getSettings
   let exAction = do
         forM_ instdir $ \dir ->
-          lift $ hideError doesNotExistErrorType $ recyclePathForcibly dir
+          hideError doesNotExistErrorType $ recyclePathForcibly dir
         when (keepDirs == Never)
-          $ lift $ rmBDir bdir
+          $ rmBDir bdir
   v <-
-    flip onException exAction
-    $ catchAllE
-        (\es -> do
-          exAction
-          throwE (BuildFailed bdir es)
-        ) action
-
+    flip onException (lift exAction)
+    $ onE_ exAction action
   when (keepDirs == Never || keepDirs == Errors) $ lift $ rmBDir bdir
   pure v
 
 
+-- | Clean up the given directory if the action fails,
+-- depending on the Settings.
+cleanUpOnError :: ( MonadReader env m
+                  , HasDirs env
+                  , HasSettings env
+                  , MonadIO m
+                  , MonadMask m
+                  , HasLog env
+                  , MonadUnliftIO m
+                  , MonadFail m
+                  , MonadCatch m
+                  )
+               => FilePath        -- ^ build directory (cleaned up depending on Settings)
+               -> Excepts e m a
+               -> Excepts e m a
+cleanUpOnError bdir action = do
+  Settings {..} <- lift getSettings
+  let exAction = when (keepDirs == Never) $ rmBDir bdir
+  flip onException (lift exAction) $ onE_ exAction action
+
+
+
 -- | Remove a build directory, ignoring if it doesn't exist and gracefully
 -- printing other errors without crashing.
 rmBDir :: (MonadReader env m, HasLog env, MonadUnliftIO m, MonadIO m) => FilePath -> m ()
@@ -1032,7 +1140,7 @@ ensureGlobalTools :: ( MonadMask m
                      , MonadUnliftIO m
                      , MonadFail m
                      )
-                  => Excepts '[DigestError , DownloadFailed, NoDownload] m ()
+                  => Excepts '[GPGError, DigestError , DownloadFailed, NoDownload] m ()
 ensureGlobalTools = do
 #if defined(IS_WINDOWS)
   (GHCupInfo _ _ gTools) <- lift getGHCupInfo
@@ -1040,12 +1148,12 @@ ensureGlobalTools = do
   shimDownload <- liftE $ lE @_ @'[NoDownload]
     $ maybe (Left NoDownload) Right $ Map.lookup ShimGen gTools
   let dl = downloadCached' shimDownload (Just "gs.exe") Nothing
-  void $ (\(DigestError _ _) -> do
+  void $ (\(DigestError _ _ _) -> do
       lift $ logWarn "Digest doesn't match, redownloading gs.exe..."
       lift $ logDebug ("rm -f " <> T.pack (cacheDir dirs </> "gs.exe"))
       lift $ hideError doesNotExistErrorType $ recycleFile (cacheDir dirs </> "gs.exe")
-      liftE @'[DigestError , DownloadFailed] $ dl
-    ) `catchE` (liftE @'[DigestError , DownloadFailed] dl)
+      liftE @'[GPGError, DigestError , DownloadFailed] $ dl
+    ) `catchE` (liftE @'[GPGError, DigestError , DownloadFailed] dl)
   pure ()
 #else
   pure ()

lib/GHCup/Utils/Dirs.hs

@@ -38,6 +38,7 @@ import           GHCup.Types
 import           GHCup.Types.JSON               ( )
 import           GHCup.Types.Optics
 import           GHCup.Utils.MegaParsec
+import           GHCup.Utils.Logger
 import           GHCup.Utils.Prelude
 
 import           Control.Exception.Safe

lib/GHCup/Utils/File/Common.hs

@@ -9,6 +9,8 @@ import           GHCup.Utils.Prelude
 
 import           Control.Monad.Reader
 import           Data.Maybe
+import           Data.Text               ( Text )
+import           Data.Void
 import           GHC.IO.Exception
 import           Optics                  hiding ((<|), (|>))
 import           System.Directory
@@ -16,7 +18,9 @@ import           System.FilePath
 import           Text.PrettyPrint.HughesPJClass hiding ( (<>) )
 import           Text.Regex.Posix
 
+import qualified Data.Text                     as T
 import qualified Data.ByteString.Lazy          as BL
+import qualified Text.Megaparsec               as MP
 
 
 
@@ -101,6 +105,16 @@ findFiles path regex = do
   contents <- listDirectory path
   pure $ filter (match regex) contents
 
+findFilesDeep :: FilePath -> Regex -> IO [FilePath]
+findFilesDeep path regex = do
+  contents <- getDirectoryContentsRecursive path
+  pure $ filter (match regex) contents
+
+findFiles' :: FilePath -> MP.Parsec Void Text a -> IO [FilePath]
+findFiles' path parser = do
+  contents <- listDirectory path
+  pure $ filter (\fp -> either (const False) (const True) $ MP.parse parser "" (T.pack fp)) contents
+
 
 checkFileAlreadyExists :: (MonadIO m) => FilePath -> m Bool
 checkFileAlreadyExists fp = liftIO $ doesFileExist fp

lib/GHCup/Utils/File/Common.hs-boot

@@ -0,0 +1,5 @@
+module GHCup.Utils.File.Common where
+
+import           Text.Regex.Posix
+
+findFiles :: FilePath -> Regex -> IO [FilePath]

lib/GHCup/Utils/File/Posix.hs

@@ -17,6 +17,7 @@ module GHCup.Utils.File.Posix where
 
 import           GHCup.Utils.File.Common
 import           GHCup.Utils.Prelude
+import           GHCup.Utils.Logger
 import           GHCup.Types
 import           GHCup.Types.Optics
 
@@ -34,8 +35,7 @@ import           Data.Sequence                  ( Seq, (|>) )
 import           Data.List
 import           Data.Word8
 import           GHC.IO.Exception
-import           System.Console.Pretty   hiding ( Pretty )
-import           System.Console.Regions
+import           System.Console.Terminal.Common
 import           System.IO.Error
 import           System.FilePath
 import           System.Directory
@@ -51,6 +51,7 @@ import qualified Data.Sequence                 as Sq
 import qualified Data.Text                     as T
 import qualified Data.Text.Encoding            as E
 import qualified System.Posix.Process          as SPP
+import qualified System.Console.Terminal.Posix as TP
 import qualified Data.ByteString               as BS
 import qualified Data.ByteString.Lazy          as BL
 import qualified "unix-bytestring" System.Posix.IO.ByteString
@@ -87,9 +88,9 @@ execLogged exe args chdir lfile env = do
   let logfile = logsDir </> lfile <> ".log"
   liftIO $ bracket (openFd logfile WriteOnly (Just newFilePerms) defaultFileFlags{ append = True })
                    closeFd
-                   (action verbose)
+                   (action verbose noColor)
  where
-  action verbose fd = do
+  action verbose no_color fd = do
     actionWithPipes $ \(stdoutRead, stdoutWrite) -> do
       -- start the thread that logs to stdout
       pState <- newEmptyMVar
@@ -100,7 +101,7 @@ execLogged exe args chdir lfile env = do
         $ EX.finally
             (if verbose
               then tee fd stdoutRead
-              else printToRegion fd stdoutRead 6 pState
+              else printToRegion fd stdoutRead 6 pState no_color
             )
             (putMVar done ())
 
@@ -137,46 +138,57 @@ execLogged exe args chdir lfile env = do
 
   -- Reads fdIn and logs the output in a continous scrolling area
   -- of 'size' terminal lines. Also writes to a log file.
-  printToRegion :: Fd -> Fd -> Int -> MVar Bool -> IO ()
-  printToRegion fileFd fdIn size pState = do
-    void $ displayConsoleRegions $ do
-      rs <-
-        liftIO
-        . fmap Sq.fromList
-        . sequence
-        . replicate size
-        . openConsoleRegion
-        $ Linear
-      flip runStateT mempty
-        $ handle
-            (\(ex :: SomeException) -> do
-              ps <- liftIO $ takeMVar pState
-              when ps (forM_ rs (liftIO . closeConsoleRegion))
-              throw ex
-            )
-        $ readTilEOF (lineAction rs) fdIn
+  printToRegion :: Fd -> Fd -> Int -> MVar Bool -> Bool -> IO ()
+  printToRegion fileFd fdIn size pState no_color = do
+    -- init region
+    forM_ [1..size] $ \_ -> BS.putStr "\n"
+
+    void $ flip runStateT mempty
+      $ do
+        handle
+          (\(ex :: SomeException) -> do
+            ps <- liftIO $ takeMVar pState
+            when ps (liftIO $ BS.putStr (pos1 <> moveLineUp size <> clearScreen))
+            throw ex
+          ) $ readTilEOF lineAction fdIn
 
    where
+    clearScreen :: ByteString
+    clearScreen = "\x1b[0J"
+    clearLine :: ByteString
+    clearLine = "\x1b[2K"
+    moveLineUp :: Int -> ByteString
+    moveLineUp n = "\x1b[" <> E.encodeUtf8 (T.pack (show n)) <> "A"
+    moveLineDown :: Int -> ByteString
+    moveLineDown n = "\x1b[" <> E.encodeUtf8 (T.pack (show n)) <> "B"
+    pos1 :: ByteString
+    pos1 = "\r"
+    overwriteNthLine :: Int -> ByteString -> ByteString
+    overwriteNthLine n str = pos1 <> moveLineUp n <> clearLine <> str <> moveLineDown n <> pos1
+
+    blue :: ByteString -> ByteString
+    blue bs 
+      | no_color = bs
+      | otherwise = "\x1b[0;34m" <> bs <> "\x1b[0m"
+
     -- action to perform line by line
-    -- TODO: do this with vty for efficiency
     lineAction :: (MonadMask m, MonadIO m)
-               => Seq ConsoleRegion
-               -> ByteString
+               => ByteString
                -> StateT (Seq ByteString) m ()
-    lineAction rs = \bs' -> do
+    lineAction = \bs' -> do
       void $ liftIO $ SPIB.fdWrite fileFd (bs' <> "\n")
       modify (swapRegs bs')
-      regs <- get
-      liftIO $ forM_ (Sq.zip regs rs) $ \(bs, r) -> setConsoleRegion r $ do
-        w <- consoleWidth
-        return
-          . T.pack
-          . color Blue
-          . T.unpack
-          . decUTF8Safe
-          . trim w
-          . (\b -> "[ " <> E.encodeUtf8 (T.pack lfile) <> " ] " <> b)
-          $ bs
+      liftIO TP.size >>= \case
+        Nothing -> pure ()
+        Just (Window _ w) -> do
+          regs <- get
+          liftIO $ forM_ (Sq.zip regs (Sq.fromList [0..(Sq.length regs - 1)])) $ \(bs, i) -> do
+              BS.putStr
+              . overwriteNthLine (size - i)
+              . trim w
+              . blue
+              . (\b -> "[ " <> E.encodeUtf8 (T.pack lfile) <> " ] " <> b)
+              $ bs
 
     swapRegs :: a -> Seq a -> Seq a
     swapRegs bs = \regs -> if

lib/GHCup/Utils/Logger.hs

@@ -1,5 +1,7 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE QuasiQuotes      #-}
+{-# LANGUAGE DataKinds        #-}
+{-# LANGUAGE OverloadedStrings   #-}
 
 {-|
 Module      : GHCup.Utils.Logger
@@ -16,21 +18,97 @@ module GHCup.Utils.Logger where
 
 import           GHCup.Types
 import           GHCup.Types.Optics
-import           GHCup.Utils.File
+import {-# SOURCE #-} GHCup.Utils.File.Common
 import           GHCup.Utils.String.QQ
 
 import           Control.Exception.Safe
 import           Control.Monad
 import           Control.Monad.IO.Class
 import           Control.Monad.Reader
+import           Data.Text               ( Text )
+import           Optics
 import           Prelude                 hiding ( appendFile )
+import           System.Console.Pretty
 import           System.FilePath
 import           System.IO.Error
 import           Text.Regex.Posix
 
 import qualified Data.ByteString               as B
 import GHCup.Utils.Prelude
+import qualified Data.Text                     as T
 
+logInfo :: ( MonadReader env m
+           , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
+           , MonadIO m
+           )
+        => Text
+        -> m ()
+logInfo = logInternal Info
+
+logWarn :: ( MonadReader env m
+           , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
+           , MonadIO m
+           )
+        => Text
+        -> m ()
+logWarn = logInternal Warn
+
+logDebug :: ( MonadReader env m
+            , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
+            , MonadIO m
+            )
+         => Text
+         -> m ()
+logDebug = logInternal Debug
+
+logError :: ( MonadReader env m
+            , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
+            , MonadIO m
+            )
+         => Text
+         -> m ()
+logError = logInternal Error
+
+
+logInternal :: ( MonadReader env m
+               , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
+               , MonadIO m
+               ) => LogLevel
+                 -> Text
+                 -> m ()
+logInternal logLevel msg = do
+  LoggerConfig {..} <- gets @"loggerConfig"
+  let color' c = if fancyColors then color c else id
+  let style' = case logLevel of
+        Debug   -> style Bold . color' Blue
+        Info    -> style Bold . color' Green
+        Warn    -> style Bold . color' Yellow
+        Error   -> style Bold . color' Red
+  let l = case logLevel of
+        Debug   -> style' "[ Debug ]"
+        Info    -> style' "[ Info  ]"
+        Warn    -> style' "[ Warn  ]"
+        Error   -> style' "[ Error ]"
+  let strs = T.split (== '\n') msg
+  let out = case strs of
+              [] -> T.empty
+              (x:xs) -> 
+                  foldr (\a b -> a <> "\n" <> b) mempty
+                . ((l <> " " <> x) :)
+                . fmap (\line' -> style' "[ ...   ] " <> line' )
+                $ xs
+
+  when (lcPrintDebug || (not lcPrintDebug && (logLevel /= Debug)))
+    $ liftIO $ consoleOutter out
+
+  -- raw output
+  let lr = case logLevel of
+        Debug   -> "Debug:"
+        Info    -> "Info:"
+        Warn    -> "Warn:"
+        Error   -> "Error:"
+  let outr = lr <> " " <> msg <> "\n"
+  liftIO $ fileOutter outr
 
 
 initGHCupFileLogging :: ( MonadReader env m

lib/GHCup/Utils/Logger.hs-boot

@@ -0,0 +1,21 @@
+{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE QuasiQuotes      #-}
+{-# LANGUAGE DataKinds        #-}
+{-# LANGUAGE OverloadedStrings   #-}
+
+module GHCup.Utils.Logger where
+
+import           GHCup.Types
+
+import           Control.Monad.IO.Class
+import           Control.Monad.Reader
+import           Data.Text               ( Text )
+import           Optics
+
+logWarn :: ( MonadReader env m
+           , LabelOptic' "loggerConfig" A_Lens env LoggerConfig
+           , MonadIO m
+           )
+        => Text
+        -> m ()
+

lib/GHCup/Utils/Prelude.hs

@@ -22,7 +22,9 @@ module GHCup.Utils.Prelude where
 #if defined(IS_WINDOWS)
 import           GHCup.Types
 #endif
+import           GHCup.Errors
 import           GHCup.Types.Optics
+import {-# SOURCE #-} GHCup.Utils.Logger
 
 import           Control.Applicative
 import           Control.Exception.Safe
@@ -31,13 +33,14 @@ import           Control.Monad.IO.Class
 import           Control.Monad.Reader
 import           Data.Bifunctor
 import           Data.ByteString                ( ByteString )
-import           Data.List                      ( nub, intercalate, stripPrefix, isPrefixOf )
+import           Data.List                      ( nub, intercalate, stripPrefix, isPrefixOf, dropWhileEnd )
 import           Data.Maybe
 import           Data.Foldable
+import           Data.List.NonEmpty             ( NonEmpty( (:|) ))
 import           Data.String
 import           Data.Text                      ( Text )
 import           Data.Versions
-import           Data.Word8
+import           Data.Word8                  hiding ( isDigit )
 import           Haskus.Utils.Types.List
 import           Haskus.Utils.Variant.Excepts
 import           Text.PrettyPrint.HughesPJClass ( prettyShow, Pretty )
@@ -58,6 +61,7 @@ import qualified Data.ByteString               as B
 import qualified Data.ByteString.Lazy          as L
 import qualified Data.Strict.Maybe             as S
 import qualified Data.List.Split               as Split
+import qualified Data.List.NonEmpty            as NE
 import qualified Data.Text                     as T
 import qualified Data.Text.Encoding            as E
 import qualified Data.Text.Encoding.Error      as E
@@ -279,6 +283,16 @@ throwEither' e eth = case eth of
   Left  _ -> throwM e
   Right r -> pure r
 
+throwMaybe :: (Exception a, MonadThrow m) => a -> Maybe b -> m b
+throwMaybe a m = case m of
+  Nothing -> throwM a
+  Just r -> pure r
+
+throwMaybeM :: (Exception a, MonadThrow m) => a -> m (Maybe b) -> m b
+throwMaybeM a am = do
+  m <- am
+  throwMaybe a m
+
 
 verToBS :: Version -> ByteString
 verToBS = E.encodeUtf8 . prettyVer
@@ -295,12 +309,28 @@ removeLensFieldLabel str' =
   maybe str' T.unpack . T.stripPrefix (T.pack "_") . T.pack $ str'
 
 
-pvpToVersion :: PVP -> Version
+pvpToVersion :: MonadThrow m => PVP -> m Version
 pvpToVersion =
-  either (\_ -> error "Couldn't convert PVP to Version") id
-    . version
-    . prettyPVP
+  either (\_ -> throwM $ ParseError "Couldn't convert PVP to Version") pure . version . prettyPVP
 
+versionToPVP :: MonadThrow m => Version -> m PVP
+versionToPVP v = either (\_ -> alternative v) pure . pvp . prettyVer $ v
+ where
+  alternative :: MonadThrow m => Version -> m PVP
+  alternative v' = case NE.takeWhile isDigit (_vChunks v') of
+    [] -> throwM $ ParseError "Couldn't convert Version to PVP"
+    xs -> pure $ pvpFromList (unsafeDigit <$> xs)
+
+  isDigit :: VChunk -> Bool
+  isDigit (Digits _ :| []) = True
+  isDigit _                = False
+
+  unsafeDigit :: VChunk -> Int
+  unsafeDigit (Digits x :| []) = fromIntegral x
+  unsafeDigit _ = error "unsafeDigit: wrong input"
+
+pvpFromList :: [Int] -> PVP
+pvpFromList = PVP . NE.fromList . fmap fromIntegral
 
 -- | Safe 'decodeUtf8With'. Replaces an invalid input byte with
 -- the Unicode replacement character U+FFFD.
@@ -508,6 +538,10 @@ recover action =
 #endif
 
 
+copyFileE :: (CopyError :< xs, MonadCatch m, MonadIO m) => FilePath -> FilePath -> Excepts xs m ()
+copyFileE from = handleIO (throwE . CopyError . show) . liftIO . copyFile from
+
+
 -- | Gathering monoidal values
 --
 -- >>> traverseFold (pure . (:["0"])) ["1","2"]
@@ -528,6 +562,8 @@ forFold = \t -> (`traverseFold` t)
 --
 -- >>> stripNewline "foo\n\n\n"
 -- "foo"
+-- >>> stripNewline "foo\n\n\nfoo"
+-- "foofoo"
 -- >>> stripNewline "foo\r"
 -- "foo"
 -- >>> stripNewline "foo"
@@ -539,10 +575,29 @@ stripNewline :: String -> String
 stripNewline = filter (`notElem` "\n\r")
 
 
+-- | Strip @\\r@ and @\\n@ from end of 'String'.
+--
+-- >>> stripNewlineEnd "foo\n\n\n"
+-- "foo"
+-- >>> stripNewlineEnd "foo\n\n\nfoo"
+-- "foo\n\n\nfoo"
+-- >>> stripNewlineEnd "foo\r"
+-- "foo"
+-- >>> stripNewlineEnd "foo"
+-- "foo"
+--
+-- prop> \t -> stripNewlineEnd (t <> "\n") === stripNewlineEnd t
+-- prop> \t -> not (any (isNewLine . c2w) t) ==> stripNewlineEnd t == t
+stripNewlineEnd :: String -> String
+stripNewlineEnd = dropWhileEnd (`elem` "\n\r")
+
+
 -- | Strip @\\r@ and @\\n@ from 'Text's
 --
 -- >>> stripNewline' "foo\n\n\n"
 -- "foo"
+-- >>> stripNewline' "foo\n\n\nfoo"
+-- "foofoo"
 -- >>> stripNewline' "foo\r"
 -- "foo"
 -- >>> stripNewline' "foo"

lib/GHCup/Version.hs

@@ -28,7 +28,7 @@ import qualified Data.Text                     as T
 -- Note that when updating this, CI requires that the file exsists AND the same file exists at
 -- 'https://www.haskell.org/ghcup/exp/ghcup-<ver>.yaml' with some newlines added.
 ghcupURL :: URI
-ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.7.yaml|]
+ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.6.yaml|]
 
 -- | The current ghcup version.
 ghcUpVer :: PVP

lib/System/Console/Terminal/Common.hs

@@ -0,0 +1,43 @@
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+{-# LANGUAGE DeriveTraversable #-}
+
+#if __GLASGOW_HASKELL__ >= 702
+#define LANGUAGE_DeriveGeneric
+{-# LANGUAGE DeriveGeneric #-}
+#endif
+
+module System.Console.Terminal.Common
+  ( Window(..)
+  ) where
+
+import Data.Data (Typeable, Data)
+
+#if __GLASGOW_HASKELL__ < 710
+import Data.Foldable (Foldable)
+import Data.Traversable (Traversable)
+#endif
+
+#ifdef LANGUAGE_DeriveGeneric
+import GHC.Generics
+  ( Generic
+#if __GLASGOW_HASKELL__ >= 706
+  , Generic1
+#endif
+  )
+#endif
+
+-- | Terminal window width and height
+data Window a = Window
+  { height :: !a
+  , width  :: !a
+  } deriving
+    ( Show, Eq, Read, Data, Typeable
+    , Foldable, Functor, Traversable
+#ifdef LANGUAGE_DeriveGeneric
+    , Generic
+#if __GLASGOW_HASKELL__ >= 706
+    , Generic1
+#endif
+#endif
+    )

lib/System/Console/Terminal/Posix.hsc

@@ -0,0 +1,65 @@
+{-# LANGUAGE CApiFFI #-}
+
+module System.Console.Terminal.Posix
+  ( size, fdSize, hSize
+  ) where
+
+import System.Console.Terminal.Common
+import Control.Exception (catch)
+import Data.Typeable (cast)
+import Foreign
+import Foreign.C.Error
+import Foreign.C.Types
+import GHC.IO.FD (FD(FD, fdFD))
+import GHC.IO.Handle.Internals (withHandle_)
+import GHC.IO.Handle.Types (Handle, Handle__(Handle__, haDevice))
+#if defined(__GLASGOW_HASKELL__) && (__GLASGOW_HASKELL__ < 706)
+import Prelude hiding (catch)
+#endif
+import System.Posix.Types (Fd(Fd))
+
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+
+#let alignment t = "%lu", (unsigned long)offsetof(struct {char x__; t (y__); }, y__)
+
+
+-- Interesting part of @struct winsize@
+data CWin = CWin CUShort CUShort
+
+instance Storable CWin where
+  sizeOf _ = (#size struct winsize)
+  alignment _ = (#alignment struct winsize)
+  peek ptr = do
+    row <- (#peek struct winsize, ws_row) ptr
+    col <- (#peek struct winsize, ws_col) ptr
+    return $ CWin row col
+  poke ptr (CWin row col) = do
+    (#poke struct winsize, ws_row) ptr row
+    (#poke struct winsize, ws_col) ptr col
+
+
+fdSize :: Integral n => Fd -> IO (Maybe (Window n))
+fdSize (Fd fd) = with (CWin 0 0) $ \ws -> do
+  _ <- throwErrnoIfMinus1 "ioctl" $
+    ioctl fd (#const TIOCGWINSZ) ws
+  CWin row col <- peek ws
+  return . Just $ Window (fromIntegral row) (fromIntegral col)
+ `catch`
+  handler
+ where
+  handler :: IOError -> IO (Maybe (Window h))
+  handler _ = return Nothing
+
+foreign import capi "sys/ioctl.h ioctl"
+  ioctl :: CInt -> CULong -> Ptr CWin -> IO CInt
+
+size :: Integral n => IO (Maybe (Window n))
+size = fdSize (Fd (#const STDOUT_FILENO))
+
+hSize :: Integral n => Handle -> IO (Maybe (Window n))
+hSize h = withHandle_ "hSize" h $ \Handle__ { haDevice = dev } ->
+  case cast dev of
+    Nothing -> return Nothing
+    Just FD { fdFD = fd } -> fdSize (Fd fd)

mkdocs.yml

@@ -0,0 +1,34 @@
+site_name: GHCup
+site_url: https://www.haskell.org/ghcup
+site_description: GHCup documentation
+site_author: GHCup Team
+site_favicon: haskell_logo.png
+
+repo_url: https://gitlab.haskell.org/haskell/ghcup-hs
+
+theme:
+    name: mkdocs
+    locale: en
+    custom_dir: docs/overrides
+
+nav:
+  - Home: index.md
+  - "Getting Started": install.md
+  - "User Guide": guide.md
+  - "Developer Guide": dev.md
+  - About: about.md
+
+extra_css:
+    - css/extra.css
+
+extra_javascript:
+  - javascripts/extra.js
+
+markdown_extensions:
+    - toc:
+        permalink: 
+    - admonition
+    - attr_list
+    - def_list
+    - meta
+

scripts/bootstrap/bootstrap-haskell

@@ -1,5 +1,9 @@
 #!/bin/sh
 
+# This script downloads the 'ghcup' binary into '~/.ghcup/bin/' and then runs an interactive
+# installation that lets you choose various options. Below is a list of environment variables
+# that affect the installation procedure.
+
 # Main settings:
 #   * BOOTSTRAP_HASKELL_NONINTERACTIVE - any nonzero value for noninteractive installation
 #   * BOOTSTRAP_HASKELL_NO_UPGRADE - any nonzero value to not trigger the upgrade
@@ -21,7 +25,7 @@
 
 plat="$(uname -s)"
 arch=$(uname -m)
-ghver="0.1.16.2"
+ghver="0.1.17.2"
 base_url="https://downloads.haskell.org/~ghcup"
 
 export GHCUP_SKIP_UPDATE_CHECK=yes
@@ -52,41 +56,60 @@ esac
 
 
 die() {
-    (>&2 printf "\\033[0;31m%s\\033[0m\\n" "$1")
+    if [ -n "${NO_COLOR}" ] ; then
+        (>&2 printf "%s\\n" "$1")
+    else
+        (>&2 printf "\\033[0;31m%s\\033[0m\\n" "$1")
+    fi
     exit 2
 }
 
 warn() {
-	case "${plat}" in
-			MSYS*|MINGW*)
-				echo -e "\\033[0;35m$1\\033[0m"
-				;;
-			*)
-				printf "\\033[0;35m%s\\033[0m\\n" "$1"
-				;;
-	esac
+    if [ -n "${NO_COLOR}" ] ; then
+        printf "%s\\n" "$1"
+    else
+        case "${plat}" in
+                MSYS*|MINGW*)
+                    # shellcheck disable=SC3037
+                    echo -e "\\033[0;35m$1\\033[0m"
+                    ;;
+                *)
+                    printf "\\033[0;35m%s\\033[0m\\n" "$1"
+                    ;;
+        esac
+    fi
 }
 
 yellow() {
-	case "${plat}" in
-			MSYS*|MINGW*)
-				echo -e "\\033[0;33m$1\\033[0m"
-				;;
-			*)
-				printf "\\033[0;33m%s\\033[0m\\n" "$1"
-				;;
-	esac
+    if [ -n "${NO_COLOR}" ] ; then
+        printf "%s\\n" "$1"
+    else
+        case "${plat}" in
+                MSYS*|MINGW*)
+                    # shellcheck disable=SC3037
+                    echo -e "\\033[0;33m$1\\033[0m"
+                    ;;
+                *)
+                    printf "\\033[0;33m%s\\033[0m\\n" "$1"
+                    ;;
+        esac
+    fi
 }
 
 green() {
-	case "${plat}" in
-			MSYS*|MINGW*)
-				echo -e "\\033[0;32m$1\\033[0m"
-				;;
-			*)
-				printf "\\033[0;32m%s\\033[0m\\n" "$1"
-				;;
-	esac
+    if [ -n "${NO_COLOR}" ] ; then
+        printf "%s\\n" "$1"
+    else
+        case "${plat}" in
+                MSYS*|MINGW*)
+                    # shellcheck disable=SC3037
+                    echo -e "\\033[0;32m$1\\033[0m"
+                    ;;
+                *)
+                    printf "\\033[0;32m%s\\033[0m\\n" "$1"
+                    ;;
+        esac
+    fi
 }
 
 edo() {
@@ -100,10 +123,12 @@ eghcup() {
 _eghcup() {
 	if [ -n "${BOOTSTRAP_HASKELL_YAML}" ] ; then
 		args="-s ${BOOTSTRAP_HASKELL_YAML}"
-	fi 
+	fi
     if [ -z "${BOOTSTRAP_HASKELL_VERBOSE}" ] ; then
+        # shellcheck disable=SC2086
         "${GHCUP_BIN}/ghcup" ${args} "$@"
     else
+        # shellcheck disable=SC2086
         "${GHCUP_BIN}/ghcup" ${args} --verbose "$@"
     fi
 }
@@ -132,6 +157,8 @@ _done() {
 				green "open the \"Mingw haskell shell\""
 				green "and the \"Mingw package management docs\""
 				green "desktop shortcuts."
+				green
+				green "If you are new to Haskell, check out https://www.haskell.org/ghcup/install/#first-steps"
 				;;
 			*)
 				green
@@ -145,6 +172,8 @@ _done() {
 				green
 				green "To install other GHC versions and tools, run:"
 				green "  ghcup tui"
+				green
+				green "If you are new to Haskell, check out https://www.haskell.org/ghcup/install/#first-steps"
 				;;
 
 	esac
@@ -191,6 +220,14 @@ download_ghcup() {
 			esac
 			;;
         "FreeBSD"|"freebsd")
+            if freebsd-version | grep -E '^12.*' ; then
+                freebsd_ver=12
+            elif freebsd-version | grep -E '^13.*' ; then
+                freebsd_ver=13
+            else
+                die "Unsupported FreeBSD version! Please report a bug at https://gitlab.haskell.org/haskell/ghcup-hs/-/issues"
+            fi
+
 			case "${arch}" in
 				x86_64|amd64)
 					;;
@@ -200,7 +237,7 @@ download_ghcup() {
 				*) die "Unknown architecture: ${arch}"
 					;;
 			esac
-			_url=${base_url}/${ghver}/x86_64-portbld-freebsd-ghcup-${ghver}
+			_url=${base_url}/${ghver}/x86_64-portbld-freebsd${freebsd_ver}-ghcup-${ghver}
             ;;
         "Darwin"|"darwin")
 			case "${arch}" in
@@ -361,7 +398,7 @@ adjust_bashrc() {
 							echo "set -q GHCUP_INSTALL_BASE_PREFIX[1]; or set GHCUP_INSTALL_BASE_PREFIX \$HOME ; set -gx PATH \$HOME/.cabal/bin \$PATH $GHCUP_BIN # ghcup-env" >> "${GHCUP_PROFILE_FILE}"
 							;;
 					esac
-					break ;;
+					;;
 				bash)
 					sed -i -e '/# ghcup-env$/ s/^#*/#/' "${GHCUP_PROFILE_FILE}"
 					echo "[ -f \"${GHCUP_DIR}/env\" ] && source \"${GHCUP_DIR}/env\" # ghcup-env" >> "${GHCUP_PROFILE_FILE}"
@@ -379,12 +416,12 @@ adjust_bashrc() {
 							fi
 							;;
 					esac
-					break ;;
+					;;
 
 				zsh)
 					sed -i -e '/# ghcup-env$/ s/^#*/#/' "${GHCUP_PROFILE_FILE}"
 					echo "[ -f \"${GHCUP_DIR}/env\" ] && source \"${GHCUP_DIR}/env\" # ghcup-env" >> "${GHCUP_PROFILE_FILE}"
-					break ;;
+					;;
 			esac
 			echo
 			echo "==============================================================================="
@@ -405,13 +442,18 @@ warn_path() {
 	echo
 	[ -n "$1" ] && warn "$1"
 	yellow "In order to run ghc and cabal, you need to adjust your PATH variable."
-	yellow "To do so, you may want run 'source $GHCUP_DIR/env' in your current terminal"
+	yellow "To do so, you may want to run 'source $GHCUP_DIR/env' in your current terminal"
 	yellow "session as well as your shell configuration (e.g. ~/.bashrc)."
 
 }
 
 adjust_cabal_config() {
-	edo cabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$HOME"/AppData/Roaming/cabal/bin), $(cygpath -w "$GHCUP_MSYS2"/usr/bin), $(cygpath -w "$GHCUP_MSYS2"/mingw64/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/lib)" -f init
+    if [ -n "${CABAL_DIR}" ] ; then
+        cabal_bin="${CABAL_DIR}/bin"
+    else
+        cabal_bin="$HOME/AppData/Roaming/cabal/bin"
+    fi
+    edo cabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$cabal_bin"), $(cygpath -w "$GHCUP_MSYS2"/usr/bin), $(cygpath -w "$GHCUP_MSYS2"/mingw64/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/lib)" -f init
 }
 
 ask_cabal_config_init() {
@@ -616,7 +658,7 @@ else
 fi
 
 echo
-echo "$(if [ -n "${BOOTSTRAP_HASKELL_YAML}" ] ; then ghcup -s "${BOOTSTRAP_HASKELL_YAML}" tool-requirements ; else ghcup tool-requirements ; fi)"
+if [ -n "${BOOTSTRAP_HASKELL_YAML}" ] ; then (>&2 ghcup -s "${BOOTSTRAP_HASKELL_YAML}" tool-requirements) ; else (>&2 ghcup tool-requirements) ; fi
 echo
 
 if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
@@ -677,4 +719,3 @@ _done
 )
 
 # vim: tabstop=4 shiftwidth=4 expandtab
-

scripts/bootstrap/bootstrap-haskell.ps1

@@ -11,6 +11,8 @@
     * cabal - The Cabal build tool for managing Haskell software"
     * stack - (optional) A cross-platform program for developing Haskell projects"
     * hls   - (optional) A language server for developers to integrate with their editor/IDE"
+    
+	By default, the installation is non-interactive, unless you run it with 'Interactive $true'.
 #>
 param (
     # Run an interactive installation
@@ -45,14 +47,30 @@ function Print-Msg {
 }
 
 function Create-Shortcut {
-    param ( [Parameter(Mandatory=$true,HelpMessage='Target path')][string]$SourceExe, [Parameter(Mandatory=$true,HelpMessage='Arguments to the path/exe')][AllowEmptyString()]$ArgumentsToSourceExe, [Parameter(Mandatory=$true,HelpMessage='The destination of the desktop link')][string]$DestinationPath )
+    param ( [Parameter(Mandatory=$true,HelpMessage='Target path')][string]$SourceExe
+          , [Parameter(Mandatory=$true,HelpMessage='Arguments to the path/exe')][AllowEmptyString()]$ArgumentsToSourceExe
+          , [Parameter(Mandatory=$true,HelpMessage='The destination of the desktop link')][string]$DestinationPath
+          , [Parameter(Mandatory=$true,HelpMessage='Temporary path to create the link at')][string]$TempPath
+           )
+	# we save to a temp dir first due to
+	# https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/267
+    $DesktopDir = [Environment]::GetFolderPath("Desktop")
+    if (!(Test-Path -Path ('{0}' -f $TempPath))) {
+      New-Item -Path $TempPath -ItemType "directory"
+    }
+    $TmpFile = ('{0}\{1}' -f $TempPath, $DestinationPath)
+    $FinalDest = ('{0}\{1}' -f $DesktopDir, $DestinationPath)
     $WshShell = New-Object -comObject WScript.Shell
-    $Shortcut = $WshShell.CreateShortcut($DestinationPath)
+    $Shortcut = $WshShell.CreateShortcut($TmpFile)
     $Shortcut.TargetPath = $SourceExe
     if($ArgumentsToSourceExe) {
       $Shortcut.Arguments = $ArgumentsToSourceExe
     }
     $Shortcut.Save()
+    if ((Test-Path -Path ('{0}' -f $FinalDest))) {
+      Remove-Item -LiteralPath $FinalDest -Force
+    }
+    Move-Item -LiteralPath $TmpFile -Destination $FinalDest
 }
 
 function Add-EnvPath {
@@ -510,11 +528,11 @@ if ($Host.Name -eq "ConsoleHost")
 }
 '@
 
-$DesktopDir = [Environment]::GetFolderPath("Desktop")
 $GhcInstArgs = '-mingw64 -mintty -c "pacman --noconfirm -S --needed base-devel gettext autoconf make libtool automake python p7zip patch unzip"'
-Create-Shortcut -SourceExe ('{0}\msys2_shell.cmd' -f $MsysDir) -ArgumentsToSourceExe $GhcInstArgs -DestinationPath ('{0}\Install GHC dev dependencies.lnk' -f $DesktopDir)
-Create-Shortcut -SourceExe ('{0}\msys2_shell.cmd' -f $MsysDir) -ArgumentsToSourceExe '-mingw64' -DestinationPath ('{0}\Mingw haskell shell.lnk' -f $DesktopDir)
-Create-Shortcut -SourceExe 'https://www.msys2.org/docs/package-management' -ArgumentsToSourceExe '' -DestinationPath ('{0}\Mingw package management docs.url' -f $DesktopDir)
+Create-Shortcut -SourceExe ('{0}\msys2_shell.cmd' -f $MsysDir) -ArgumentsToSourceExe $GhcInstArgs -DestinationPath 'Install GHC dev dependencies.lnk' -TempPath $GhcupDir
+Create-Shortcut -SourceExe ('{0}\msys2_shell.cmd' -f $MsysDir) -ArgumentsToSourceExe '-mingw64' -DestinationPath 'Mingw haskell shell.lnk' -TempPath $GhcupDir
+Create-Shortcut -SourceExe 'https://www.msys2.org/docs/package-management' -ArgumentsToSourceExe '' -DestinationPath 'Mingw package management docs.url' -TempPath $GhcupDir
+$DesktopDir = [Environment]::GetFolderPath("Desktop")
 $null = New-Item -Path $DesktopDir -Name "Uninstall Haskell.ps1" -ItemType "file" -Force -Value $uninstallShortCut
 
 Print-Msg -msg ('Adding {0}\bin to Users Path...' -f $GhcupDir)

scripts/dev/modgraph.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+graphmod | tred | dot -Tsvg -Gsize=10,9\! > docs/modules_small.svg
+graphmod | tred | dot -Tsvg -Gsize=15,9\! > docs/modules_wide.svg

stack.yaml

@@ -1,22 +1,17 @@
-resolver: lts-18.2
+resolver: lts-18.12
 
 packages:
   - .
 
 extra-deps:
-  - git: https://github.com/bgamari/terminal-size
-    commit: 34ea816bd63f75f800eedac12c6908c6f3736036
-
-  - git: https://github.com/hasufell/libarchive
-    commit: 8587aab78dd515928024ecd82c8f215e06db85cd
-
+  - Cabal-3.6.2.0@sha256:e2266e14758c1f799220fad7f0d4b0b4ec567d81b7ba3faea17ff76d4c31de95,12437
   - IfElse-0.85@sha256:6939b94acc6a55f545f63a168a349dd2fbe4b9a7cca73bf60282db5cc6aa47d2,445
   - ascii-string-1.0.1.4@sha256:fa34f1d9ba57e8e89c0d4c9cef5e01ba32cb2d4373d13f92dcc0b531a6c6749b,2582
   - base16-bytestring-0.1.1.7@sha256:0021256a9628971c08da95cb8f4d0d72192f3bb8a7b30b55c080562d17c43dd3,2231
   - brick-0.64@sha256:f03fa14607c22cf48af99e24c44f79a0fb073f7ec229f15e969fed9ff73c93f6,16530
   - brotli-0.0.0.0@sha256:2bf383a4cd308745740986be0b18381c5a0784393fe69b91456aacb2d603de46,2964
   - brotli-streams-0.0.0.0@sha256:1af1e22f67b8bfd6ad0d05e61825e7a178d738f689ebbb21c1aab5f1bbcae176,2331
-  - chs-cabal-0.1.1.0@sha256:20ec6a9fb5ab6991f1a4adf157c537bd5d3b98d08d3c09c387c954c7c50bd011,1153
+  - chs-cabal-0.1.1.1
   - chs-deps-0.1.0.0@sha256:0cdada6d2c682c41b20331b8c63c2ecfc7e806928585195fd544c9d41f3074fd,2496
   - composition-prelude-3.0.0.2@sha256:1ffed216bd28d810fce0b5be83a661e2a892696d73b3f8de5c0f5edb9b5f0090,1216
   - haskus-utils-data-1.4@sha256:bfa94363b94b14779edd6834fbd59dbb847c3d7b8f48e3844f456ffdc077da4a,1466
@@ -29,6 +24,7 @@ extra-deps:
   - hspec-discover-2.7.10@sha256:d08bf5dd785629f589571477d9beb7cd91529471bd89f39517c1cb4b9b38160f,2184
   - hspec-golden-aeson-0.9.0.0@sha256:aa17274114026661ba4dfc9c60c230673c8f408bd86482fd611d2d5cb6aff996,2179
   - http-io-streams-0.1.6.0@sha256:53f5bab177efb52cd65ec396fd04ed59b93e5f919fb3700cd7dacd6cfce6f06d,3582
+  - libarchive-3.0.3.0
   - lzma-static-5.2.5.3@sha256:2758ee58c35992fcf7db78e98684c357a16a82fa2a4e7c352a6c210c08c555d8,7308
   - optics-0.4@sha256:9fb69bf0195b8d8f1f8cd0098000946868b8a3c3ffb51e5b64f79fc600c3eb4c,6568
   - optics-core-0.4@sha256:59e04aebca536bd011ae50c781937f45af4c1456af1eb9fb578f9a69eee293cd,4995

www/ghcup.css

@@ -94,7 +94,7 @@ body#idx p.other-help {
 }
 
 .instructions > * {
-    width: 55rem;
+    width: 40rem;
     margin-left: auto;
     margin-right: auto;
 }
@@ -117,10 +117,12 @@ body#idx p.other-help {
 	margin-top: 25px;
 	margin-bottom: 25px;
     text-align: center;
+
+	padding: 18px;
 }
 
 .instructions div.command-button button:hover {
-	background: rgb(232, 232, 232);
+	background: rgb(100, 100, 100);
 }
 
 .instructions div.command-button button:focus {
@@ -174,7 +176,17 @@ span.code {
     line-height: 2rem;
 }
 
+#help {
+    margin-bottom: 0px !important;
+}
+
+#collective {
+    margin-top: 1em !important;
+    margin-bottom: 0px !important;
+}
+
 #about {
+    margin-top: 0.5em !important;
     font-size: 16px;
     line-height: 2em;
 }

www/index.html

@@ -24,30 +24,29 @@
       </p>
 
       <div id="platform-instructions-linux" class="instructions" style="display: none;">
-        <p>Run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
-		<div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
-        <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.<br/>You appear to be running Linux. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
+        <p>On Linux, run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
+		<div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div> 
+	<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://ghcup.readthedocs.io/en/latest/install/#manual-install">I don't like curl | sh</a> <b>&nbsp;&middot;&nbsp;</b> <a class="default-platform-button" href="#">I'm not running Linux</a></p>
       </div>
 
       <div id="platform-instructions-mac" class="instructions" style="display: none;">
-        <p>Run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
+        <p>On macOS, run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
 		<div class="command-button"><pre><span class='ghcup-command' id="ghcup-command-normal">curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
-        <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.<br/>You appear to be running macOS. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
+	<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://ghcup.readthedocs.io/en/latest/install/#manual-install">I don't like curl | sh</a> <b>&nbsp;&middot;&nbsp;</b> <a class="default-platform-button" href="#">I'm not running macOS</a></p>
       </div>
 
       <div id="platform-instructions-freebsd" class="instructions" style="display: none;">
-        <p>Run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
+        <p>On FreeBSD Run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
 		<div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
-        <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.<br/>You appear to be running FreeBSD. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
+	<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://ghcup.readthedocs.io/en/latest/install/#manual-install">I don't like curl | sh</a> <b>&nbsp;&middot;&nbsp;</b> <a class="default-platform-button" href="#">I'm not running FreeBSD</a></p>
       </div>
 
       <div id="platform-instructions-win32" class="instructions">
         <p>
-            To install Haskell,<br/>run the following in a powershell session (as a non-admin user).
+            On Windows, to install Haskell,<br/>run the following in a powershell session (as a non-admin user).
 			<div>
 			<div class="command-button"><pre><span class='ghcup-command' id="ghcup-command-powershell">Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true</span></span></pre><button class="tooltip" onclick="copyToClipboardPowershell()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button>
 			</div>
-				<p class="other-help">If you want to run a non-interactive installation, change <span class='code'>$true</span> to <span class='code'>$false</span> at the end of the script.</p>
 			</div>
 		<p>If you're a Windows Subsystem 2 for Linux user run the following in your terminal, then follow the onscreen instructions to install Haskell.
 		</p>
@@ -58,18 +57,19 @@
 		</div>
         </p>
         <hr/>
-		<p class="other-help">You appear to be running Windows 32-bit. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
+	<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a class="default-platform-button" href="#">I'm not running Windows</a></p>
       </div>
 
       <div id="platform-instructions-win64" class="instructions" style="display: none;">
         <p>
-            To install Haskell,<br/>run the following in a powershell session (as a non-admin user).
+            On Windows, to install Haskell,<br/>run the following in a powershell session (as a non-admin user).
 			<div>
 			<div class="command-button"><pre><span class='ghcup-command'>Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true</span></span></pre><button class="tooltip" onclick="copyToClipboardPowershell()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button>
 			</div>
-				<p class="other-help">If you want to run an non-interactive installation, change <span class='code'>$true</span> to <span class='code'>$false</span> at the end of the script.</p>
+	<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a class="default-platform-button" href="#">I'm not running Windows</a></p>
 			</div>
         </p>
+        <hr/>
 		<p>If you're a Windows Subsystem 2 for Linux user run the following in your terminal, then follow the onscreen instructions to install Haskell.
 		</p>
 		<div>
@@ -77,7 +77,7 @@
 		</div>
 		<p class="other-help">WSL1 does not work with ghcup, follow  <a href="https://docs.microsoft.com/en-us/windows/wsl/install-win10">the instructions here</a> to upgrade to WSL2 if needed.</p>
 		</div>
-		<p class="other-help">You appear to be running Windows 64-bit. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
+	<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a class="default-platform-button" href="#">I'm not running Windows</a></p>
       </div>
 
       <div id="platform-instructions-unknown" class="instructions" style="display: none;">
@@ -101,7 +101,7 @@
         <div>
           <p>If you are running Linux, macOS, FreeBSD or Windows Subsystem 2 for Linux, run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
 		  <div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
-          <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.</p>
+		<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://ghcup.readthedocs.io/en/latest/install/#manual-install">I don't like curl | sh</a></p>
         </div>
 
         <hr/>
@@ -120,7 +120,7 @@
           <p>To install Haskell, if you are running Linux, macOS, FreeBSD or Windows Subsystem 2 for Linux, run the following
           in your terminal (as a user other than root), then follow the onscreen instructions.</p>
 		  <div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
-          <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.</p>
+	<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://ghcup.readthedocs.io/en/latest/install/#manual-install">I don't like curl | sh</a></p>
         </div>
 
         <hr/>
@@ -130,25 +130,30 @@
             If you are running Windows,<br/>run the following in a powershell session (as a non-admin user).
 			<div class="command-button"><pre><span class='ghcup-command'>Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true</span></span></pre><button class="tooltip" onclick="copyToClipboardPowershell()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button>
 			</div>
-				<p class="other-help">If you want to run a non-interactive installation, change <span class='code'>$true</span> to <span class='code'>$false</span> at the end of the script.</p>
+				<p class="other-help"><a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1" target="_blank">What does this do?</a></p>
 			</div>
           </p>
         </div>
 
       </div>
 
-      <p>
+      <p id="help">
 	  Need help? Ask on <a href="https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup"><img src="irc.svg" height="18px" alt="" />IRC</a>, <a href="https://discord.gg/pKYf3zDQU7"><img src="Discord-Logo-Black.svg" height="18px" alt="" />Discord</a>, <a href="https://app.element.io/#/room/#haskell-tooling:matrix.org"><img src="Matrix_logo.svg" height="25px" alt="" style="top:5px;position:relative;" /></a> or <a href="https://gitlab.haskell.org/haskell/ghcup-hs/issues">report a bug <img src="Octicons-bug.svg" height="18px" alt="" /></a>.
       </p>
+      <p id="collective">
+		<a id="collective" href="https://opencollective.com/ghcup#category-CONTRIBUTE" target="_blank">
+			<img src="https://opencollective.com/webpack/donate/button@2x.png?color=blue" width=200 />
+		</a>
+      </p>
 
       <p id="about">
         <img src="haskell-logo.svg" alt="" />
         ghcup is a haskell.org supported project.
         <br/>
         <a href="https://www.haskell.org/downloads/">other installation options</a>
-        &nbsp;&middot;&nbsp;
-        <a href="https://gitlab.haskell.org/haskell/ghcup-hs">about ghcup</a>
-        &nbsp;&middot;&nbsp;
+		<b>&nbsp;&middot;&nbsp;</b>
+        <a href="https://ghcup.readthedocs.io/en/latest/">read the docs</a>
+		<b>&nbsp;&middot;&nbsp;</b>
         <a href="https://github.com/rust-lang/rustup.rs/tree/master/www">web design from rustup</a>
       </p>
     <script type="text/javascript" src="ghcup.js"></script>