35 changed files with 448 additions and 3807 deletions
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@ -12,52 +12,16 @@ variables:
  image: "registry.gitlab.haskell.org/ghc/ci-images/x86_64-linux-deb9:$DOCKER_REV"
  tags:
    - x86_64-linux
-  variables:
-    OS: "LINUX"
-
-.alpine:64bit:
-  image: "alpine:edge"
-  tags:
-    - x86_64-linux
-  variables:
-    OS: "LINUX"
-    BIT: "64"
-
-.alpine:32bit:
-  image: "i386/alpine:edge"
-  tags:
-    - x86_64-linux
-  variables:
-    OS: "LINUX"
-    BIT: "32"

 .darwin:
  tags:
    - x86_64-darwin
-  variables:
-    OS: "DARWIN"
-
-.freebsd:
-  tags:
-    - x86_64-freebsd
-  variables:
-    OS: "FREEBSD"
-
-.root_cleanup:
-  after_script:
-    - BUILD_DIR=$CI_PROJECT_DIR
-    - echo "Cleaning $BUILD_DIR"
-    - cd $HOME
-    - test -n "$BUILD_DIR"
-    - shopt -s extglob
-    - rm -Rf "$BUILD_DIR"/!(out)
-    - exit 0

 .test_ghcup_version:
  script:
    - ./.gitlab/script/ghcup_version.sh
  variables:
-    JSON_VERSION: "0.0.2"
+    JSON_VERSION: "0.0.1"

 .test_ghcup_version:linux:
  extends:
@ -65,133 +29,50 @@ variables:
    - .debian
  before_script:
    - ./.gitlab/before_script/linux/install_deps.sh
+  variables:
+    OS: "LINUX"

 .test_ghcup_version:darwin:
  extends:
    - .test_ghcup_version
    - .darwin
-    - .root_cleanup
  before_script:
    - ./.gitlab/before_script/darwin/install_deps.sh
+  variables:
+    OS: "DARWIN"
+  after_script:
+    - BUILD_DIR=$CI_PROJECT_DIR
+    - echo "Cleaning $BUILD_DIR"
+    - cd $HOME
+    - rm -Rf "$BUILD_DIR"/*
+    - exit 0

-.test_ghcup_version:freebsd:
-  extends:
-    - .test_ghcup_version
-    - .freebsd
-    - .root_cleanup
-  before_script:
-    - ./.gitlab/before_script/freebsd/install_deps.sh

-.release_ghcup:
-  script:
-    - ./.gitlab/script/ghcup_release.sh
-  artifacts:
-    expire_in: 2 week
-    paths:
-      - out
-  only:
-    - tags

-######## linux test ########
+######## linux ########

 test:linux:recommended:
  extends: .test_ghcup_version:linux
  variables:
-    GHC_VERSION: "8.6.5"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "recommended"

 test:linux:latest:
  extends: .test_ghcup_version:linux
  variables:
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "latest"
  allow_failure: true


-######## darwin test ########
+######## darwin ########

 test:mac:recommended:
  extends: .test_ghcup_version:darwin
  variables:
-    GHC_VERSION: "8.6.5"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "recommended"

 test:mac:latest:
  extends: .test_ghcup_version:darwin
  variables:
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "latest"
  allow_failure: true

-
-######## freebsd test ########
-
-test:freebsd:recommended:
-  extends: .test_ghcup_version:freebsd
-  variables:
-    GHC_VERSION: "8.6.5"
-    CABAL_VERSION: "3.2.0.0"
-
-test:freebsd:latest:
-  extends: .test_ghcup_version:freebsd
-  variables:
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
-  allow_failure: true
-
-
-######## linux release ########
-
-release:linux:64bit:
-  extends:
-    - .alpine:64bit
-    - .release_ghcup
-  before_script:
-    - ./.gitlab/before_script/linux/alpine/install_deps.sh
-  variables:
-    ARTIFACT: "x86_64-linux-ghcup"
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
-
-
-release:linux:32bit:
-  extends:
-    - .alpine:32bit
-    - .release_ghcup
-  before_script:
-    - ./.gitlab/before_script/linux/alpine/install_deps.sh
-  variables:
-    ARTIFACT: "i386-linux-ghcup"
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
-
-
-######## darwin release ########
-
-release:darwin:
-  extends:
-    - .darwin
-    - .release_ghcup
-    - .root_cleanup
-  before_script:
-    - ./.gitlab/before_script/darwin/install_deps.sh
-  variables:
-    ARTIFACT: "x86_64-apple-darwin-ghcup"
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
-    MACOSX_DEPLOYMENT_TARGET: "10.7"
-
-
-######## freebsd release ########
-
-release:freebsd:
-  extends:
-    - .freebsd
-    - .release_ghcup
-    - .root_cleanup
-  before_script:
-    - ./.gitlab/before_script/freebsd/install_deps.sh
-  variables:
-    ARTIFACT: "x86_64-portbld-freebsd-ghcup"
-    GHC_VERSION: "8.6.5"
-
--- a/.gitlab/before_script/darwin/install_deps.sh
+++ b/.gitlab/before_script/darwin/install_deps.sh
@ -4,11 +4,11 @@ set -eux

 . "$( cd "$(dirname "$0")" ; pwd -P )/../../ghcup_env"

-curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-apple-darwin-ghcup > ./ghcup-bin
-chmod +x ghcup-bin
+curl -sSfL https://gitlab.haskell.org/haskell/ghcup/-/raw/master/ghcup > ./ghcup-legacy
+chmod +x ghcup-legacy

-./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin set ${GHC_VERSION}
-./ghcup-bin install-cabal ${CABAL_VERSION}
+./ghcup-legacy install ${GHC_VERSION}
+./ghcup-legacy set ${GHC_VERSION}
+./ghcup-legacy install-cabal

 exit 0
--- a/.gitlab/before_script/freebsd/install_deps.sh
+++ b/.gitlab/before_script/freebsd/install_deps.sh
@ -1,23 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-# pkg install --force --yes --no-repo-update curl gcc gmp gmake ncurses perl5 libffi libiconv
-
-. "$( cd "$(dirname "$0")" ; pwd -P )/../../ghcup_env"
-
-curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-portbld-freebsd-ghcup > ./ghcup-bin
-chmod +x ghcup-bin
-
-mkdir -p "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin
-# ./ghcup-bin install ${GHC_VERSION}
-# ./ghcup-bin install-cabal ${CABAL_VERSION}
-# ./ghcup-bin set ${GHC_VERSION}
-
-# install cabal-3.2.0.0
-curl -sSfL -o cabal-install-3.2.0.0-x86_64-portbld-freebsd.tar.xz 'https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-x86_64-portbld-freebsd.tar.xz&dl=1'
-tar xf cabal-install-3.2.0.0-x86_64-portbld-freebsd.tar.xz
-cp cabal "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
-chmod +x "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
-
-exit 0
--- a/.gitlab/before_script/linux/alpine/install_deps.sh
+++ b/.gitlab/before_script/linux/alpine/install_deps.sh
@ -1,61 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-. "$( cd "$(dirname "$0")" ; pwd -P )/../../../ghcup_env"
-
-apk add --no-cache \
-	curl \
-	gcc \
-	g++ \
-	gmp-dev \
-	ncurses-dev \
-	libffi-dev \
-	make \
-	xz \
-	tar \
-	perl
-
-ln -s libncurses.so /usr/lib/libtinfo.so
-ln -s libncursesw.so.6 /usr/lib/libtinfow.so.6
-if [ "${BIT}" = "32" ] ; then
-	curl -sSfL https://downloads.haskell.org/~ghcup/0.1.4/i386-linux-ghcup-0.1.4 > ./ghcup-bin
-else
-	curl -sSfL https://downloads.haskell.org/~ghcup/0.1.4/x86_64-linux-ghcup-0.1.4 > ./ghcup-bin
-fi
-chmod +x ghcup-bin
-./ghcup-bin upgrade
-./ghcup-bin install ${GHC_VERSION}
-# ./ghcup-bin install-cabal ${CABAL_VERSION}
-# install cabal-3.2.0.0
-if [ "${BIT}" = "32" ] ; then
-	curl -sSfL -o cabal-install-3.2.0.0-i386-alpine-linux-musl.tar.xz 'https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-i386-alpine-linux-musl.tar.xz&dl=1'
-	tar xf cabal-install-3.2.0.0-i386-alpine-linux-musl.tar.xz
-	cp cabal-install-3.2.0.0-i386-alpine-linux-musl "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
-else
-	curl -sSfL -o cabal-install-3.2.0.0-x86_64-alpine-linux-musl.tar.xz 'https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-x86_64-alpine-linux-musl.tar.xz&dl=1'
-	tar xf cabal-install-3.2.0.0-x86_64-alpine-linux-musl.tar.xz
-	cp cabal-install-3.2.0.0-x86_64-alpine-linux-musl "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
-fi
-chmod +x "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
-
-
-# utils
-apk add --no-cache \
-	bash \
-	git
-
-## Package specific
-apk add --no-cache \
-	zlib \
-	zlib-dev \
-	zlib-static \
-	gmp \
-	gmp-dev \
-	openssl-dev \
-	openssl-libs-static \
-	xz \
-	xz-dev
-
-
-
--- a/.gitlab/before_script/linux/install_deps.sh
+++ b/.gitlab/before_script/linux/install_deps.sh
@ -3,14 +3,14 @@
 set -eux

 sudo apt-get update -y
-sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev git wget
+sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev

 . "$( cd "$(dirname "$0")" ; pwd -P )/../../ghcup_env"

-curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-linux-ghcup > ./ghcup-bin
-chmod +x ghcup-bin
+curl -sSfL https://gitlab.haskell.org/haskell/ghcup/-/raw/master/ghcup > ./ghcup-legacy
+chmod +x ghcup-legacy

-./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin set ${GHC_VERSION}
-./ghcup-bin install-cabal ${CABAL_VERSION}
+./ghcup-legacy install ${GHC_VERSION}
+./ghcup-legacy set ${GHC_VERSION}
+./ghcup-legacy install-cabal

--- a/.gitlab/script/ghcup_release.sh
+++ b/.gitlab/script/ghcup_release.sh
@ -1,30 +0,0 @@
-#!/bin/sh
-
-set -eux
-
-. "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup_env"
-
-mkdir -p "$CI_PROJECT_DIR"/.local/bin
-
-ecabal() {
-	cabal --store-dir="$(pwd)"/.store "$@"
-}
-
-git describe
-
-# build
-ecabal update
-
-if [ "${OS}" = "LINUX" ] ; then
-	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections -optl-static'
-elif [ "${OS}" = "FREEBSD" ] ; then
-	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections'
-else
-	ecabal build -w ghc-${GHC_VERSION}
-fi
-
-mkdir out
-cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --verbose=0 --offline sh -- -c 'command -v ghcup')" .
-ver=$(./ghcup --numeric-version)
-cp ghcup out/${ARTIFACT}-${ver}
-
--- a/.gitlab/script/ghcup_version.sh
+++ b/.gitlab/script/ghcup_version.sh
@ -14,45 +14,32 @@ eghcup() {
 	ghcup -v -c -s file://$(pwd)/ghcup-${JSON_VERSION}.json "$@"
 }

-git describe
-
-### build
-
+# build
 ecabal update

 if [ "${OS}" = "DARWIN" ] ; then
-	ecabal build -w ghc-${GHC_VERSION}
+	ecabal build -fcurl
 else
-	ecabal build -w ghc-${GHC_VERSION} -finternal-downloader
+	ecabal build
 fi

 cp "$(ecabal new-exec --enable-tests --verbose=0 --offline sh -- -c 'command -v ghcup')" .
 cp "$(ecabal new-exec --enable-tests --verbose=0 --offline sh -- -c 'command -v ghcup-gen')" .

+
+# testing
+
 cp ./ghcup "$CI_PROJECT_DIR"/.local/bin/ghcup
 cp ./ghcup-gen "$CI_PROJECT_DIR"/.local/bin/ghcup-gen
-
-### cleanup
-
 rm -rf "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup

-
-### manual cli based testing
-
-
 ghcup-gen check -f ghcup-${JSON_VERSION}.json

-eghcup --numeric-version
-
-# TODO: rm once we have tarballs
-if [ "${OS}"  = "FREEBSD" ] ; then
-	GHC_VERSION=8.6.3
-	CABAL_VERSION=2.4.1.0
-fi
+eghcup numeric-version

 eghcup install ${GHC_VERSION}
 eghcup set ${GHC_VERSION}
-eghcup install-cabal ${CABAL_VERSION}
+eghcup install-cabal

 cabal --version

@ -71,11 +58,7 @@ ghci-$(ghc --numeric-version) --version

 # test installing new ghc doesn't mess with currently set GHC
 # https://gitlab.haskell.org/haskell/ghcup-hs/issues/7
-if [ "${OS}" = "DARWIN" ] ; then
-	eghcup install 8.4.4
-else # test wget a bit
-	eghcup --downloader=wget install 8.4.4
-fi
+eghcup install 8.4.4
 [ "$(ghc --numeric-version)" = "${ghc_ver}" ]
 eghcup set 8.4.4
 eghcup set 8.4.4
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -1,6 +1,6 @@
 # Revision history for ghcup

-## 0.1.4 -- 2020-04-16
+## 0.1.4 -- 2012-04-16

 * build on all platforms with curl (as a binary), wrt https://gitlab.haskell.org/haskell/ghcup-hs/issues/6
 * Fix unlinking of ghc symlinks after new installation, wrt https://gitlab.haskell.org/haskell/ghcup-hs/issues/7
--- a/HACKING.md
+++ b/HACKING.md
@ -43,15 +43,3 @@ Kazu Yamamoto [explained it in his PR](https://github.com/yesodweb/wai/pull/752#
 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
-`GHCup.Data.GHCupDownloads`.
-
--- a/README.md
+++ b/README.md
@ -68,15 +68,6 @@ handles your haskell packages and can demand that [a specific version](https://c
 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 `shell-completions`.
-
-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).
-
 ## Design goals

 1. simplicity
@ -151,6 +142,3 @@ ghcup is not a reimplementation of stack. The only common part is automatic inst

 Consider using [Chocolatey](https://chocolatey.org/search?q=ghc) or [ghcups](https://github.com/kakkun61/ghcups).

-3. Why the haskell reimplementation?
-
-Why not?
--- a/RELEASING.md
+++ b/RELEASING.md
@ -4,11 +4,8 @@

 2. Add/fix downloads to `GHCupDownloads` module, then run `ghcup-gen gen` to generate the new json and validate it via `ghcup-gen check`.

-3. Commit and git push with tag. Wait for tests to succeed and release artifacts to build.
+3. Commit and git push with tag. Wait for tests to succeed.

-4. Download release artifacts and upload them `downloads.haskell.org/ghcup`
-
-5. Add release artifacts to GHCupDownloads (see point 2.)
-
-6. Upload the final `ghcup-<ver>.json` to `webhost.haskell.org/ghcup/data/`.
+4. Upload the new `ghcup-<ver>.json` to `webhost.haskell.org/ghcup/data/`.

+5. Build ghcup releases for Linux (fully static), mac (with `-fcurl`) and FreeBSD (with `-fcurl`). Upload to `webhost.haskell.org/ghcup/bin/` and update symlinks.
--- a/TODO.md
+++ b/TODO.md
@ -2,39 +2,27 @@

 ## Now

-* try to run exe before upgrade (backup to ~/.ghcup/bin/ghcup.old)
-* allow to build 8.8
-* curl DL does not cache json
-* explain environment variables
-* add --keep=<always|error> option
-
-* allow to switch to curl/wget at runtime
-
-* cross support
-* installing multiple versions of the same
-
-* proper test suite
-* add more logging
-
+* move out GHCup.Version module, bc it's not library-ish

 ## Maybe

-* version ranges in json
+* maybe: changelog          Show the changelog of a GHC release (online)
 * sign the JSON? (Or check gpg keys?)
 * testing (especially distro detection -> unit tests)

 ## Later

+* i386 support
 * add support for RC/alpha/HEAD versions

 ## Cleanups

+* too many decodeutf8
 * avoid alternative for IO
 * use plucky or oops instead of Excepts

 ## Questions

-* move out GHCup.Version module, bc it's not library-ish?
 * mirror support
 * interactive handling when distro doesn't exist and we know the tarball is incompatible?
 * ghcup-with wrapper to execute a command with a given ghc in PATH?
--- a/lib/GHCup/Data/GHCupDownloads.hs
+++ b/lib/GHCup/Data/GHCupDownloads.hs
@ -2,7 +2,7 @@
 {-# LANGUAGE QuasiQuotes       #-}


-module GHCup.Data.GHCupDownloads where
+module GHCupDownloads where

 import           GHCup.Types
 import           GHCup.Utils.Version.QQ
@ -827,7 +827,7 @@ ghc_883_32_musl :: DownloadInfo
 ghc_883_32_musl = DownloadInfo
  [uri|https://github.com/redneb/ghc-alt-libc/releases/download/ghc-8.8.3-musl/ghc-8.8.3-i386-unknown-linux-musl.tar.xz|]
  (Just [rel|ghc-8.8.3|])
-  "7a5f41646d06777e75636291a1855d60a0984552bbdf33c3d107565d302f38a4"
+  "23779adb4cf4b314d0f8c66ee215ba6e74154c0768a573780475943544020bec"



@ -951,24 +951,6 @@ cabal_3000_64_darwin = DownloadInfo
  Nothing
  "d4857e068560515e4cbb0e8ca124c370e07892f2a28804d87152834e5fe2b845"

-cabal_3000_64_freebsd :: DownloadInfo
-cabal_3000_64_freebsd = DownloadInfo
-  [uri|https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.0.0.0-x86_64-portbld-freebsd.tar.xz&dl=1|]
-  Nothing
-  "d97b6469ed612a1367ad1032d0722469ee5277668879694d7d4336233b937516"
-
-cabal_3000_32_alpine :: DownloadInfo
-cabal_3000_32_alpine = DownloadInfo
-  [uri|https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.0.0.0-i386-alpine-linux-musl.tar.xz&dl=1|]
-  Nothing
-  "a4191cd5a645b00e6a9c53abe6f3cb91fe700de7d7c520c9cb36ce8ec5c9919a"
-
-cabal_3000_64_alpine :: DownloadInfo
-cabal_3000_64_alpine = DownloadInfo
-  [uri|https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.0.0.0-x86_64-alpine-linux-musl.tar.xz&dl=1|]
-  Nothing
-  "7b35e5986aba4a40fc37141cbde26612bfc916e95a2d2ff35a413612d8c7cd3a"
-


    ---------------------
@ -994,24 +976,6 @@ cabal_3200_64_darwin = DownloadInfo
  Nothing
  "9197c17d2ece0f934f5b33e323cfcaf486e4681952687bc3d249488ce3cbe0e9"

-cabal_3200_64_freebsd :: DownloadInfo
-cabal_3200_64_freebsd = DownloadInfo
-  [uri|https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-x86_64-portbld-freebsd.tar.xz&dl=1|]
-  Nothing
-  "e4dc00ab7fef51354e7624dd03e49c6bb684887fc95acb9b33bc52f357a5ef8c"
-
-cabal_3200_32_alpine :: DownloadInfo
-cabal_3200_32_alpine = DownloadInfo
-  [uri|https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-i386-alpine-linux-musl.tar.xz&dl=1|]
-  Nothing
-  "4aaa52fbc337ae1ef855a2aa2808186580b21ec36883aafec7473e7d899bc5ec"
-
-cabal_3200_64_alpine :: DownloadInfo
-cabal_3200_64_alpine = DownloadInfo
-  [uri|https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-x86_64-alpine-linux-musl.tar.xz&dl=1|]
-  Nothing
-  "c1f3c21a5307cea8d2a0bd9a2eab9f56f3dd90e947ae64e231f909024980992b"
-



@ -1020,32 +984,32 @@ cabal_3200_64_alpine = DownloadInfo
    -------------


-ghcup_014_32_linux :: DownloadInfo
-ghcup_014_32_linux = DownloadInfo
-  [uri|https://downloads.haskell.org/~ghcup/0.1.4/i386-linux-ghcup-0.1.4|]
+ghcup_013_32_linux :: DownloadInfo
+ghcup_013_32_linux = DownloadInfo
+  [uri|https://downloads.haskell.org/~ghcup/0.1.3/i386-linux-ghcup-0.1.3|]
  Nothing
-  "057cc1cc39abdacd92cb1d4fb44c850fd9c5398a36b893286248ac5c38bc0c70"
+  "ff76a6130d6ea869a65bed127255bfa1ddf6aa1bd690df99d872467422c08be0"


-ghcup_014_64_linux :: DownloadInfo
-ghcup_014_64_linux = DownloadInfo
-  [uri|https://downloads.haskell.org/~ghcup/0.1.4/x86_64-linux-ghcup-0.1.4|]
+ghcup_013_64_linux :: DownloadInfo
+ghcup_013_64_linux = DownloadInfo
+  [uri|https://downloads.haskell.org/~ghcup/0.1.3/x86_64-linux-ghcup-0.1.3|]
  Nothing
-  "78d69ed4c9a810a445af89ea25e4217a632799ecb427b06cd2320ffb574f555e"
+  "873f73b65cf5e399864b81ed597a0e14fa73e0c492429cd3a85fe0fdc585a4c8"


-ghcup_014_64_freebsd :: DownloadInfo
-ghcup_014_64_freebsd = DownloadInfo
-  [uri|https://downloads.haskell.org/~ghcup/0.1.4/x86_64-portbld-freebsd-ghcup-0.1.4|]
+ghcup_013_64_freebsd :: DownloadInfo
+ghcup_013_64_freebsd = DownloadInfo
+  [uri|https://downloads.haskell.org/~ghcup/0.1.3/x86_64-portbld-freebsd-ghcup-0.1.3|]
  Nothing
-  "cda0b959f053abc04ab0a1b9919a505b8c9304e2898a291f527a370cb0e00731"
+  "2daa775d6fa307cb8123fa45ba20e2acd244cdb8cfb3f2b3c8a1aa3f3571c46f"


-ghcup_014_64_darwin10_13 :: DownloadInfo
-ghcup_014_64_darwin10_13 = DownloadInfo
-  [uri|https://downloads.haskell.org/~ghcup/0.1.4/x86_64-apple-darwin-ghcup-0.1.4|]
+ghcup_013_64_darwin10_13 :: DownloadInfo
+ghcup_013_64_darwin10_13 = DownloadInfo
+  [uri|https://downloads.haskell.org/~ghcup/0.1.3/x86_64-apple-darwin-ghcup-0.1.3|]
  Nothing
-  "2422b79933ae037237ccb8f836417b90b3111d7931beb7ae8b9e33a1945c641e"
+  "a617b06619ec6e75d50dac53f36814c3cafd4dbeebe8cea46d9cd5842c0c94a9"



@ -1062,10 +1026,7 @@ ghcupDownloads = M.fromList
    , M.fromList
      [ ( [vver|7.10.3|]
        , VersionInfo
-            [Base [pver|4.8.2.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/7.10.3/docs/html/users_guide/release-7-10-1.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3-src.tar.xz|]
              (Just [rel|ghc-7.10.3|])
@ -1108,10 +1069,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.0.2|]
        , VersionInfo
-            [Base [pver|4.9.1.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.0.2/docs/html/users_guide/8.0.1-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.0.2/ghc-8.0.2-src.tar.xz|]
              (Just [rel|ghc-8.0.2|])
@ -1154,10 +1112,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.2.2|]
        , VersionInfo
-            [Base [pver|4.10.1.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.2.2/docs/html/users_guide/8.2.2-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.2.2/ghc-8.2.2-src.tar.xz|]
              (Just [rel|ghc-8.2.2|])
@ -1206,10 +1161,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.4.1|]
        , VersionInfo
-            [Base [pver|4.11.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.4.1/docs/html/users_guide/8.4.1-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.4.1/ghc-8.4.1-src.tar.xz|]
              (Just [rel|ghc-8.4.1|])
@ -1245,10 +1197,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.4.2|]
        , VersionInfo
-            [Base [pver|4.11.1.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.4.2/docs/html/users_guide/8.4.2-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-src.tar.xz|]
              (Just [rel|ghc-8.4.2|])
@ -1295,10 +1244,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.4.3|]
        , VersionInfo
-            [Base [pver|4.11.1.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.4.3/docs/html/users_guide/8.4.3-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.4.3/ghc-8.4.3-src.tar.xz|]
              (Just [rel|ghc-8.4.3|])
@ -1344,10 +1290,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.4.4|]
        , VersionInfo
-            [Base [pver|4.11.1.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.4.4/docs/html/users_guide/8.4.4-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.4.4/ghc-8.4.4-src.tar.xz|]
              (Just [rel|ghc-8.4.4|])
@ -1398,10 +1341,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.6.1|]
        , VersionInfo
-            [Base [pver|4.12.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.6.1/docs/html/users_guide/8.6.1-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.6.1/ghc-8.6.1-src.tar.xz|]
              (Just [rel|ghc-8.6.1|])
@ -1448,10 +1388,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.6.2|]
        , VersionInfo
-            [Base [pver|4.12.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.6.2/docs/html/users_guide/8.6.2-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.6.2/ghc-8.6.2-src.tar.xz|]
              (Just [rel|ghc-8.6.2|])
@ -1492,10 +1429,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.6.3|]
        , VersionInfo
-            [Base [pver|4.12.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.6.3/docs/html/users_guide/8.6.3-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.6.3/ghc-8.6.3-src.tar.xz|]
              (Just [rel|ghc-8.6.3|])
@ -1546,10 +1480,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.6.4|]
        , VersionInfo
-            [Base [pver|4.12.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.6.4/docs/html/users_guide/8.6.4-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.6.4/ghc-8.6.4-src.tar.xz|]
              (Just [rel|ghc-8.6.4|])
@ -1595,10 +1526,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.6.5|]
        , VersionInfo
-            [Base [pver|4.12.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.6.5/docs/html/users_guide/8.6.5-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.6.5/ghc-8.6.5-src.tar.xz|]
              (Just [rel|ghc-8.6.5|])
@ -1648,10 +1576,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.8.1|]
        , VersionInfo
-            [Base [pver|4.13.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.8.1/docs/html/users_guide/8.8.1-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.8.1/ghc-8.8.1-src.tar.xz|]
              (Just [rel|ghc-8.8.1|])
@ -1701,10 +1626,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.8.2|]
        , VersionInfo
-            [Base [pver|4.13.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.8.2/docs/html/users_guide/8.8.2-notes.html|]
-            )
+            []
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.8.2/ghc-8.8.2-src.tar.xz|]
              (Just [rel|ghc-8.8.2|])
@ -1754,10 +1676,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.8.3|]
        , VersionInfo
-            [Recommended, Base [pver|4.13.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.8.3/docs/html/users_guide/8.8.3-notes.html|]
-            )
+            [Recommended]
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.8.3/ghc-8.8.3-src.tar.xz|]
              (Just [rel|ghc-8.8.3|])
@ -1807,10 +1726,7 @@ ghcupDownloads = M.fromList
        )
      , ( [vver|8.10.1|]
        , VersionInfo
-            [Latest, Base [pver|4.14.0.0|]]
-            (Just
-              [uri|https://downloads.haskell.org/ghc/8.10.1/docs/html/users_guide/8.10.1-notes.html|]
-            )
+            [Latest]
            (Just $ DownloadInfo
              [uri|https://downloads.haskell.org/~ghc/8.10.1/ghc-8.10.1-src.tar.xz|]
              (Just [rel|ghc-8.10.1|])
@ -1880,9 +1796,6 @@ ghcupDownloads = M.fromList
      [ ( [vver|2.4.1.0|]
        , VersionInfo
            []
-            (Just
-              [uri|https://downloads.haskell.org/~cabal/cabal-install-2.4.1.0/changelog|]
-            )
            (Just $ DownloadInfo
              [uri|https://github.com/haskell/cabal/archive/cabal-install-v2.4.1.0.tar.gz|]
              (Just [rel|cabal-cabal-install-v2.4.1.0/cabal-install|])
@ -1911,9 +1824,6 @@ ghcupDownloads = M.fromList
      , ( [vver|3.0.0.0|]
        , VersionInfo
            []
-            (Just
-              [uri|https://downloads.haskell.org/~cabal/cabal-install-3.0.0.0/changelog|]
-            )
            (Just $ DownloadInfo
              [uri|https://github.com/haskell/cabal/archive/cabal-install-v3.0.0.0.tar.gz|]
              (Just [rel|cabal-cabal-install-v3.0.0.0/cabal-install|])
@ -1925,9 +1835,7 @@ ghcupDownloads = M.fromList
                  [ ( Linux UnknownLinux
                    , M.fromList [(Nothing, cabal_3000_64_linux)]
                    )
-                  , (Linux Alpine, M.fromList [(Nothing, cabal_3000_64_alpine)])
-                  , (Darwin      , M.fromList [(Nothing, cabal_3000_64_darwin)])
-                  , (FreeBSD, M.fromList [(Nothing, cabal_3000_64_freebsd)])
+                  , (Darwin, M.fromList [(Nothing, cabal_3000_64_darwin)])
                  ]
                )
              , ( A_32
@ -1935,7 +1843,6 @@ ghcupDownloads = M.fromList
                  [ ( Linux UnknownLinux
                    , M.fromList [(Nothing, cabal_3000_32_linux)]
                    )
-                  , (Linux Alpine, M.fromList [(Nothing, cabal_3000_32_alpine)])
                  ]
                )
              ]
@ -1943,9 +1850,6 @@ ghcupDownloads = M.fromList
      , ( [vver|3.2.0.0|]
        , VersionInfo
            [Recommended, Latest]
-            (Just
-              [uri|https://downloads.haskell.org/~cabal/cabal-install-3.2.0.0/changelog|]
-            )
            (Just $ DownloadInfo
              [uri|https://github.com/haskell/cabal/archive/cabal-install-v3.2.0.0.tar.gz|]
              (Just [rel|cabal-cabal-install-v3.2.0.0/cabal-install|])
@ -1957,9 +1861,7 @@ ghcupDownloads = M.fromList
                  [ ( Linux UnknownLinux
                    , M.fromList [(Nothing, cabal_3200_64_linux)]
                    )
-                  , (Linux Alpine, M.fromList [(Nothing, cabal_3200_64_alpine)])
-                  , (Darwin      , M.fromList [(Nothing, cabal_3200_64_darwin)])
-                  , (FreeBSD, M.fromList [(Nothing, cabal_3200_64_freebsd)])
+                  , (Darwin, M.fromList [(Nothing, cabal_3200_64_darwin)])
                  ]
                )
              , ( A_32
@ -1967,7 +1869,6 @@ ghcupDownloads = M.fromList
                  [ ( Linux UnknownLinux
                    , M.fromList [(Nothing, cabal_3200_32_linux)]
                    )
-                  , (Linux Alpine, M.fromList [(Nothing, cabal_3200_32_alpine)])
                  ]
                )
              ]
@ -1976,31 +1877,20 @@ ghcupDownloads = M.fromList
    )
  , ( GHCup
    , M.fromList
-      [ ( [vver|0.1.4|]
-        , VersionInfo
-            [Recommended, Latest]
-            (Just
-              [uri|https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/CHANGELOG.md|]
-            )
-            Nothing
-          $ M.fromList
-              [ ( A_64
-                , M.fromList
-                  [ ( Linux UnknownLinux
-                    , M.fromList [(Nothing, ghcup_014_64_linux)]
-                    )
-                  , (Darwin , M.fromList [(Nothing, ghcup_014_64_darwin10_13)])
-                  , (FreeBSD, M.fromList [(Nothing, ghcup_014_64_freebsd)])
-                  ]
-                )
-              , ( A_32
-                , M.fromList
-                  [ ( Linux UnknownLinux
-                    , M.fromList [(Nothing, ghcup_014_32_linux)]
-                    )
-                  ]
-                )
+      [ ( [vver|0.1.3|]
+        , VersionInfo [Recommended, Latest] Nothing $ M.fromList
+          [ ( A_64
+            , M.fromList
+              [ (Linux UnknownLinux, M.fromList [(Nothing, ghcup_013_64_linux)])
+              , (Darwin, M.fromList [(Nothing, ghcup_013_64_darwin10_13)])
+              , (FreeBSD, M.fromList [(Nothing, ghcup_013_64_freebsd)])
              ]
+            )
+          , ( A_32
+            , M.fromList
+              [(Linux UnknownLinux, M.fromList [(Nothing, ghcup_013_32_linux)])]
+            )
+          ]
        )
      ]
    )
--- a/lib/GHCup/Data/GHCupInfo.hs
+++ b/lib/GHCup/Data/GHCupInfo.hs
@ -1,7 +1,7 @@
-module GHCup.Data.GHCupInfo where
+module GHCupInfo where

-import           GHCup.Data.GHCupDownloads
-import           GHCup.Data.ToolRequirements
+import           GHCupDownloads
+import           ToolRequirements
 import           GHCup.Types


--- a/app/ghcup-gen/Main.hs
+++ b/app/ghcup-gen/Main.hs
@ -10,10 +10,10 @@

 module Main where

-import           GHCup.Data.GHCupInfo
 import           GHCup.Types
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.Logger
+import           GHCupInfo

 import           Data.Aeson                     ( eitherDecode, encode )
 import           Data.Aeson.Encode.Pretty
--- a/lib/GHCup/Data/ToolRequirements.hs
+++ b/lib/GHCup/Data/ToolRequirements.hs
@ -1,11 +1,10 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuasiQuotes       #-}

-module GHCup.Data.ToolRequirements where
+module ToolRequirements where

 import           GHCup.Types
 import           GHCup.Utils.String.QQ
-import           GHCup.Utils.Version.QQ

 import qualified Data.Map                      as M

@ -62,35 +61,6 @@ toolRequirements = M.fromList
                )
              ]
            )
-          , ( Linux CentOS
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  [ "gcc"
-                  , "gcc-c++"
-                  , "gmp"
-                  , "make"
-                  , "ncurses"
-                  , "ncurses-compat-libs"
-                  , "xz"
-                  , "perl"
-                  ]
-                  ""
-                ),
-              ( Just [vers|7|]
-                , Requirements
-                  [ "gcc"
-                  , "gcc-c++"
-                  , "gmp"
-                  , "make"
-                  , "ncurses"
-                  , "xz"
-                  , "perl"
-                  ]
-                  ""
-                )
-              ]
-            )
          , ( Darwin
            , M.fromList
              [ ( Nothing
--- a/app/ghcup-gen/Validate.hs
+++ b/app/ghcup-gen/Validate.hs
@ -63,7 +63,6 @@ validate dls = do

    checkGHCisSemver
    forM_ (M.toList dls) $ \(t, _) -> checkMandatoryTags t
-    _ <- checkGHCHasBaseVersion

    -- exit
    e <- liftIO $ readIORef ref
@ -86,7 +85,7 @@ validate dls = do
      [i|FreeBSD missing for #{t} #{v'} #{arch}|]

  checkUniqueTags tool = do
-    let allTags = join $ M.elems $ availableToolVersions dls tool
+    let allTags = join $ fmap snd $ availableToolVersions dls tool
    let nonUnique =
          fmap fst
            .   filter (\(_, b) -> not b)
@ -106,10 +105,8 @@ validate dls = do
        lift $ $(logError) [i|Tags not unique for #{tool}: #{xs}|]
        addError
   where
-    isUniqueTag Latest         = True
-    isUniqueTag Recommended    = True
-    isUniqueTag (Base       _) = False
-    isUniqueTag (UnknownTag _) = False
+    isUniqueTag Latest      = True
+    isUniqueTag Recommended = True

  checkGHCisSemver = do
    let ghcVers = toListOf (ix GHC % to M.keys % folded) dls
@ -121,24 +118,13 @@ validate dls = do

  -- a tool must have at least one of each mandatory tags
  checkMandatoryTags tool = do
-    let allTags = join $ M.elems $ availableToolVersions dls tool
+    let allTags = join $ fmap snd $ availableToolVersions dls tool
    forM_ [Latest, Recommended] $ \t -> case elem t allTags of
      False -> do
        lift $ $(logError) [i|Tag #{t} missing from #{tool}|]
        addError
      True -> pure ()

-  -- all GHC versions must have a base tag
-  checkGHCHasBaseVersion = do
-    let allTags = M.toList $ availableToolVersions dls GHC
-    forM allTags $ \(ver, tags) -> case any isBase tags of
-      False -> do
-        lift $ $(logError) [i|Base tag missing from GHC ver #{ver}|]
-        addError
-      True -> pure ()
-
-  isBase (Base _) = True
-  isBase _        = False

 validateTarballs :: ( Monad m
                    , MonadLogger m
@ -175,7 +161,7 @@ validateTarballs dls = do

 where
  downloadAll dli = do
-    let settings = Settings True False Never Curl
+    let settings = Settings True False
    let runLogger = myLoggerT LoggerConfig { lcPrintDebug = True
                                           , colorOutter  = B.hPut stderr
                                           , rawOutter    = (\_ -> pure ())
--- a/app/ghcup/Main.hs
+++ b/app/ghcup/Main.hs
@ -17,7 +17,6 @@ import           GHCup.Platform
 import           GHCup.Requirements
 import           GHCup.Types
 import           GHCup.Utils
-import           GHCup.Utils.File
 import           GHCup.Utils.Logger
 import           GHCup.Utils.Prelude
 import           GHCup.Version
@ -32,9 +31,7 @@ import           Data.Bifunctor
 import           Data.Char
 import           Data.Either
 import           Data.Functor
-import           Data.List                      ( intercalate, sort )
-import           Data.List.NonEmpty             (NonEmpty ((:|)))
-import           Data.Maybe
+import           Data.List                      ( intercalate )
 import           Data.String.Interpolate
 import           Data.Text                      ( Text )
 import           Data.Versions
@ -43,11 +40,8 @@ import           GHC.IO.Encoding
 import           Haskus.Utils.Variant.Excepts
 import           HPath
 import           HPath.IO
-import           Language.Haskell.TH
 import           Options.Applicative     hiding ( style )
-import           Options.Applicative.Help.Pretty ( text )
 import           Prelude                 hiding ( appendFile )
-import           Safe
 import           System.Console.Pretty
 import           System.Environment
 import           System.Exit
@ -74,8 +68,6 @@ data Options = Options
  , optCache     :: Bool
  , optUrlSource :: Maybe URI
  , optNoVerify  :: Bool
-  , optKeepDirs  :: KeepDirs
-  , optsDownloader :: Downloader
  -- commands
  , optCommand   :: Command
  }
@ -89,16 +81,12 @@ data Command
  | DInfo
  | Compile CompileCommand
  | Upgrade UpgradeOpts Bool
+  | NumericVersion
  | ToolRequirements
-  | ChangeLog ChangeLogOptions

 data ToolVersion = ToolVersion Version
                 | ToolTag Tag

-prettyToolVer :: ToolVersion -> String
-prettyToolVer (ToolVersion v') = T.unpack $ prettyVer v'
-prettyToolVer (ToolTag t) = show t
-

 data InstallOptions = InstallOptions
  { instVer      :: Maybe ToolVersion
@ -110,9 +98,8 @@ data SetGHCOptions = SetGHCOptions
  }

 data ListOptions = ListOptions
-  { lTool      :: Maybe Tool
-  , lCriteria  :: Maybe ListCriteria
-  , lRawFormat :: Bool
+  { lTool     :: Maybe Tool
+  , lCriteria :: Maybe ListCriteria
  }

 data RmOptions = RmOptions
@ -137,19 +124,17 @@ data UpgradeOpts = UpgradeInplace
                 | UpgradeGHCupDir
                 deriving Show

-data ChangeLogOptions = ChangeLogOptions
-  { clOpen    :: Bool
-  , clTool    :: Maybe Tool
-  , clToolVer :: Maybe ToolVersion
-  }
-

 opts :: Parser Options
 opts =
  Options
-    <$> switch (short 'v' <> long "verbose" <> help "Enable verbosity")
+    <$> switch
+          (short 'v' <> long "verbose" <> help
+            "Enable verbosity"
+          )
    <*> switch
-          (short 'c' <> long "cache" <> help "Cache downloads in ~/.ghcup/cache"
+          (short 'c' <> long "cache" <> help
+            "Cache downloads in ~/.ghcup/cache"
          )
    <*> (optional
          (option
@ -166,31 +151,6 @@ opts =
          (short 'n' <> long "no-verify" <> help
            "Skip tarball checksum verification"
          )
-    <*> option
-          (eitherReader keepOnParser)
-          (  long "keep"
-          <> metavar "<always|errors|never>"
-          <> help
-               "Keep build directories? (default: never)"
-          <> value Never
-          <> hidden
-          )
-    <*> option
-          (eitherReader downloaderParser)
-          (  long "downloader"
-#if defined(INTERNAL_DOWNLOADER)
-          <> metavar "<internal|curl|wget>"
-          <> help
-          "Downloader to use (default: internal)"
-          <> value Internal
-#else
-          <> metavar "<curl|wget>"
-          <> help
-          "Downloader to use (default: curl)"
-          <> value Curl
-#endif
-          <> hidden
-          )
    <*> com
 where
  parseUri s' =
@ -202,21 +162,15 @@ com =
  subparser
      (  command
          "install"
-          ((info
-             ((Install <$> installOpts) <**> helper)
-             (  progDesc "Install or update GHC"
-             <> footerDoc (Just $ text installFooter)
-             )
+          ((info ((Install <$> installOpts) <**> helper)
+                 (progDesc "Install or update GHC")
           )
          )
      <> command
           "set"
           (   SetGHC
-           <$> (info
-                 (setGHCOpts <**> helper)
-                 (  progDesc "Set currently active GHC version"
-                 <> footerDoc (Just $ text setFooter)
-                 )
+           <$> (info (setGHCOpts <**> helper)
+                     (progDesc "Set currently active GHC version")
               )
           )
      <> command
@ -227,11 +181,8 @@ com =

      <> command
           "install-cabal"
-           ((info
-              ((InstallCabal <$> installOpts) <**> helper)
-              (  progDesc "Install or update cabal"
-              <> footerDoc (Just $ text installCabalFooter)
-              )
+           ((info ((InstallCabal <$> installOpts) <**> helper)
+                  (progDesc "Install or update cabal")
            )
           )
      <> command
@ -243,14 +194,12 @@ com =
           )
      <> command
           "upgrade"
-           (info
-             (    (Upgrade <$> upgradeOptsP <*> switch
-                    (short 'f' <> long "force" <> help "Force update")
-                  )
-             <**> helper
-             )
-             (progDesc "Upgrade ghcup")
-           )
+           (info ((Upgrade <$> upgradeOptsP <*>
+            switch
+            (short 'f' <> long "force" <> help
+              "Force update"
+            )
+           ) <**> helper) (progDesc "Upgrade ghcup"))
      <> command
           "compile"
           (   Compile
@ -264,6 +213,11 @@ com =
          (  command
              "debug-info"
              ((\_ -> DInfo) <$> (info (helper) (progDesc "Show debug info")))
+          <> command
+               "numeric-version"
+               (   (\_ -> NumericVersion)
+               <$> (info (helper) (progDesc "Show the numeric version"))
+               )
          <> command
               "tool-requirements"
               (   (\_ -> ToolRequirements)
@ -271,35 +225,9 @@ com =
                         (progDesc "Show the requirements for ghc/cabal")
                   )
               )
-          <> command
-               "changelog"
-               ((info (fmap ChangeLog changelogP <**> helper)
-                      (progDesc "Find/show changelog"
-                      <> footerDoc (Just $ text changeLogFooter)
-                      )
-                )
-               )
          <> commandGroup "Other commands:"
          <> hidden
          )
- where
-  installFooter = [i|Discussion:
-  Installs the specified GHC version (or a recommended default one) into
-  a self-contained "~/.ghcup/ghc/<ghcver>" directory
-  and symlinks the ghc binaries to "~/.ghcup/bin/<binary>-<ghcver>".|]
-  setFooter = [i|Discussion:
-  Sets the the current GHC version by creating non-versioned
-  symlinks for all ghc binaries of the specified version in
-  "~/.ghcup/bin/<binary>".|]
-  installCabalFooter = [i|Discussion:
-  Installs the specified cabal-install version (or a recommended default one)
-  into "~/.ghcup/bin", so it can be overwritten by later
-  "cabal install cabal-install", which installs into "~/.cabal/bin" by
-  default. Make sure to set up your PATH appropriately, so the cabal
-  installation takes precedence.|]
-  changeLogFooter = [i|Discussion:
-  By default returns the URI of the ChangeLog of the latest GHC release.
-  Pass '-o' to automatically open via xdg-open.|]


 installOpts :: Parser InstallOptions
@ -342,75 +270,27 @@ listOpts =
            )
          )
        )
-    <*> switch
-          (short 'r' <> long "raw-format" <> help "More machine-parsable format"
-          )

 rmOpts :: Parser RmOptions
 rmOpts = RmOptions <$> versionArgument


-changelogP :: Parser ChangeLogOptions
-changelogP =
-  (\x y -> ChangeLogOptions x y)
-    <$> switch (short 'o' <> long "open" <> help "xdg-open the changelog url")
-    <*> (optional
-          (option
-            (eitherReader
-              (\s' -> case fmap toLower s' of
-                "ghc"   -> Right GHC
-                "cabal" -> Right Cabal
-                "ghcup" -> Right GHCup
-                e       -> Left $ e
-              )
-            )
-            (short 't' <> long "tool" <> metavar "<ghc|cabal|ghcup>" <> help
-              "Open changelog for given tool (default: ghc)"
-            )
-          )
-        )
-    <*> optional toolVersionArgument
-
 compileP :: Parser CompileCommand
 compileP = subparser
  (  command
      "ghc"
      (   CompileGHC
-      <$> (info
-            (compileOpts <**> helper)
-            (  progDesc "Compile GHC from source"
-            <> footerDoc (Just $ text compileFooter)
-            )
+      <$> (info (compileOpts <**> helper) (progDesc "Compile GHC from source")
          )
      )
  <> command
       "cabal"
       (   CompileCabal
-       <$> (info
-             (compileOpts <**> helper)
-             (  progDesc "Compile Cabal from source"
-             <> footerDoc (Just $ text compileCabalFooter)
-             )
+       <$> (info (compileOpts <**> helper)
+                 (progDesc "Compile Cabal from source")
           )
       )
  )
- where
-  compileFooter = [i|Discussion:
-  Compiles and installs the specified GHC version into
-  a self-contained "~/.ghcup/ghc/<ghcver>" directory
-  and symlinks the ghc binaries to "~/.ghcup/bin/<binary>-<ghcver>".
-
-Examples:
-  ghcup compile ghc -j 4 -v 8.4.2 -b 8.2.2
-  ghcup compile ghc -j 4 -v 8.4.2 -b /usr/bin/ghc-8.2.2|]
-  compileCabalFooter = [i|Discussion:
-  Compiles and installs the specified Cabal version
-  into "~/.ghcup/bin".
-
-Examples:
-  ghcup compile cabal -j 4 -v 3.2.0.0 -b 8.6.5
-  ghcup compile cabal -j 4 -v 3.2.0.0 -b /usr/bin/ghc-8.6.5|]
-


 compileOpts :: Parser CompileOptions
@ -491,7 +371,9 @@ toolVersionArgument =


 versionArgument :: Parser Version
-versionArgument = argument (eitherReader versionEither) (metavar "VERSION")
+versionArgument = argument
+  (eitherReader versionEither)
+  (metavar "VERSION")

 versionParser :: Parser Version
 versionParser = option
@ -503,17 +385,14 @@ tagEither :: String -> Either String Tag
 tagEither s' = case fmap toLower s' of
  "recommended" -> Right Recommended
  "latest"      -> Right Latest
-  ('b':'a':'s':'e':'-':ver') -> case pvp (T.pack ver') of
-                                  Right x -> Right (Base x)
-                                  Left  _ -> Left [i|Invalid PVP version for base #{ver'}|]
  other         -> Left ([i|Unknown tag #{other}|])

 versionEither :: String -> Either String Version
 versionEither s' =
  -- 'version' is a bit too lax and will parse typoed tags
-                   case readMaybe ((: []) . head $ s') :: Maybe Int of
-  Just _  -> bimap (const "Not a valid version") id . version . T.pack $ s'
-  Nothing -> Left "Not a valid version"
+  case readMaybe ((:[]) . head $ s') :: Maybe Int of
+    Just _  -> bimap (const "Not a valid version") id . version . T.pack $ s'
+    Nothing -> Left "Not a valid version"

 toolVersionEither :: String -> Either String ToolVersion
 toolVersionEither s' =
@ -534,24 +413,6 @@ criteriaParser s' | t == T.pack "installed" = Right ListInstalled
  where t = T.toLower (T.pack s')


-keepOnParser :: String -> Either String KeepDirs
-keepOnParser s' | t == T.pack "always" = Right Always
-                | t == T.pack "errors" = Right Errors
-                | t == T.pack "never"  = Right Never
-                | otherwise            = Left ("Unknown keep value: " <> s')
-  where t = T.toLower (T.pack s')
-
-
-downloaderParser :: String -> Either String Downloader
-downloaderParser s' | t == T.pack "curl"     = Right Curl
-                    | t == T.pack "wget"     = Right Wget
-#if defined(INTERNAL_DOWNLOADER)
-                    | t == T.pack "internal" = Right Internal
-#endif
-                    | otherwise = Left ("Unknown downloader 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
  Right r -> pure r
@ -627,10 +488,8 @@ platformParser s' = case MP.parse (platformP <* MP.eof) "" (T.pack s') of

 toSettings :: Options -> Settings
 toSettings Options {..} =
-  let cache      = optCache
-      noVerify   = optNoVerify
-      keepDirs   = optKeepDirs
-      downloader = optsDownloader
+  let cache    = optCache
+      noVerify = optNoVerify
  in  Settings { .. }


@ -659,55 +518,13 @@ upgradeOptsP =



-describe_result :: String
-describe_result = $( (LitE . StringL) <$>
-                     runIO (do
-                             CapturedProcess{..} <- executeOut [rel|git|] ["describe"] Nothing
-                             case _exitCode of
-                               ExitSuccess   -> pure . T.unpack . decUTF8Safe $ _stdOut
-                               ExitFailure _ -> pure numericVer
-                     )
-                   )
-

 main :: IO ()
 main = do
-  let versionHelp = infoOption
-        ( ("The GHCup Haskell installer, version " <>)
-        $ (head . lines $ describe_result)
-        )
-        (long "version" <> help "Show version" <> hidden)
-  let numericVersionHelp = infoOption
-        numericVer
-        (  long "numeric-version"
-        <> help "Show the numeric version (for use in scripts)"
-        <> hidden
-        )
-  let listCommands = infoOption
-        "install set rm install-cabal list upgrade compile debug-info tool-requirements changelog"
-        (  long "list-commands"
-        <> help "List available commands for shell completion"
-        <> internal
-        )

-  let main_footer = [i|Discussion:
-  ghcup installs the Glasgow Haskell Compiler from the official
-  release channels, enabling you to easily switch between different
-  versions. It maintains a self-contained ~/.ghcup directory.
-
-ENV variables:
-  * TMPDIR: where ghcup does the work (unpacking, building, ...)
-  * GHCUP_INSTALL_BASE_PREFIX: the base of ghcup (default: $HOME)
-
-Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
-
-  customExecParser
-      (prefs showHelpOnError)
-      (info (opts <**> helper <**> versionHelp <**> numericVersionHelp <**> listCommands)
-            (footerDoc (Just $ text main_footer))
-      )
+  customExecParser (prefs showHelpOnError) (info (opts <**> helper) idm)
    >>= \opt@Options {..} -> do
-          let settings@Settings{..} = toSettings opt
+          let settings = toSettings opt

          -- create ~/.ghcup dir
          ghcdir <- ghcupBaseDir
@ -753,7 +570,10 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                    , TagNotFound
                    ]

-          let runListGHC = runE @'[] . runLogger
+          let runListGHC =
+                runLogger
+                  . flip runReaderT settings
+                  . runE @'[FileDoesNotExistError]

          let runRmGHC =
                runLogger . flip runReaderT settings . runE @'[NotInstalled]
@ -818,175 +638,141 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
          (GHCupInfo treq dls) <-
            ( runLogger
              . flip runReaderT settings
-              . runE @'[JSONError , DownloadFailed, FileDoesNotExistError]
+              . runE @'[JSONError , DownloadFailed]
              $ liftE
-              $ getDownloadsF (maybe GHCupURL OwnSource optUrlSource)
+              $ getDownloads (maybe GHCupURL OwnSource optUrlSource)
              )
              >>= \case
                    VRight r -> pure r
-                    VLeft  e -> do
+                    VLeft e ->
                      runLogger
-                        ($(logError) [i|Error fetching download info: #{e}|])
-                      exitWith (ExitFailure 2)
+                          ($(logError) [i|Error fetching download info: #{e}|])
+                        >> exitFailure
          runLogger $ checkForUpdates dls

-          res <- case optCommand of
+          case optCommand of
            Install (InstallOptions {..}) ->
-              (runInstTool $ do
-                  v <- liftE $ fromVersion dls instVer GHC
-                  liftE $ installGHCBin dls v instPlatform
-                )
+              void
+                $   (runInstTool $ do
+                      v <- liftE $ fromVersion dls instVer GHC
+                      liftE $ installGHCBin dls v instPlatform
+                    )
                >>= \case
-                      VRight _ -> do
+                      VRight _ ->
                        runLogger $ $(logInfo) ("GHC installation successful")
-                        pure ExitSuccess
-                      VLeft (V (AlreadyInstalled _ v)) -> do
+                      VLeft (V (AlreadyInstalled _ v)) ->
                        runLogger $ $(logWarn)
                          [i|GHC ver #{prettyVer v} already installed|]
-                        pure ExitSuccess
-                      VLeft (V (BuildFailed tmpdir e)) -> do
-                        case keepDirs of
-                          Never -> runLogger ($(logError) [i|Build failed with #{e}|])
-                          _ -> runLogger ($(logError) [i|Build failed with #{e}
-Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.
-Make sure to clean up #{tmpdir} afterwards.|])
-                        pure $ ExitFailure 3
-                      VLeft (V NoDownload) -> do
-
-                        runLogger $ do
-                          case instVer of
-                            Just iver -> $(logError) [i|No available GHC version for #{prettyToolVer iver}|]
-                            Nothing -> $(logError) [i|No available recommended GHC version|]
-                        pure $ ExitFailure 3
+                      VLeft (V (BuildFailed tmpdir e)) ->
+                        runLogger
+                            ($(logError) [i|Build failed with #{e}
+Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.|]
+                            )
+                          >> exitFailure
                      VLeft e -> do
                        runLogger $ do
                          $(logError) [i|#{e}|]
                          $(logError) [i|Also check the logs in ~/.ghcup/logs|]
-                        pure $ ExitFailure 3
+                        exitFailure
            InstallCabal (InstallOptions {..}) ->
-              (runInstTool $ do
-                  v <- liftE $ fromVersion dls instVer Cabal
-                  liftE $ installCabalBin dls v instPlatform
-                )
+              void
+                $   (runInstTool $ do
+                      v <- liftE $ fromVersion dls instVer Cabal
+                      liftE $ installCabalBin dls v instPlatform
+                    )
                >>= \case
-                      VRight _ -> do
+                      VRight _ ->
                        runLogger $ $(logInfo) ("Cabal installation successful")
-                        pure ExitSuccess
-                      VLeft (V (AlreadyInstalled _ v)) -> do
+                      VLeft (V (AlreadyInstalled _ v)) ->
                        runLogger $ $(logWarn)
                          [i|Cabal ver #{prettyVer v} already installed|]
-                        pure ExitSuccess
-                      VLeft (V NoDownload) -> do
-
-                        runLogger $ do
-                          case instVer of
-                            Just iver -> $(logError) [i|No available Cabal version for #{prettyToolVer iver}|]
-                            Nothing -> $(logError) [i|No available recommended Cabal version|]
-                        pure $ ExitFailure 4
                      VLeft e -> do
                        runLogger $ do
                          $(logError) [i|#{e}|]
                          $(logError) [i|Also check the logs in ~/.ghcup/logs|]
-                        pure $ ExitFailure 4
+                        exitFailure

            SetGHC (SetGHCOptions {..}) ->
-              (runSetGHC $ do
-                  v <- liftE $ fromVersion dls ghcVer GHC
-                  liftE $ setGHC v SetGHCOnly
-                )
+              void
+                $   (runSetGHC $ do
+                      v <- liftE $ fromVersion dls ghcVer GHC
+                      liftE $ setGHC v SetGHCOnly
+                    )
                >>= \case
-                      VRight v -> do
-                        runLogger
-                          $ $(logInfo)
-                              [i|GHC #{prettyVer v} successfully set as default version|]
-                        pure ExitSuccess
-                      VLeft e -> do
-                        runLogger ($(logError) [i|#{e}|])
-                        pure $ ExitFailure 5
+                      VRight v ->
+                        runLogger $ $(logInfo) [i|GHC #{prettyVer v} successfully set as default version|]
+                      VLeft e ->
+                        runLogger ($(logError) [i|#{e}|]) >> exitFailure

            List (ListOptions {..}) ->
-              (runListGHC $ do
-                  l <- listVersions dls lTool lCriteria
-                  pure l
-                )
+              void
+                $   (runListGHC $ do
+                      liftIO $ listVersions dls lTool lCriteria
+                    )
                >>= \case
-                      VRight r -> do
-                        liftIO $ printListResult lRawFormat r
-                        pure ExitSuccess
-                      VLeft e -> do
-                        runLogger ($(logError) [i|#{e}|])
-                        pure $ ExitFailure 6
+                      VRight r -> liftIO $ printListResult r
+                      VLeft e ->
+                        runLogger ($(logError) [i|#{e}|]) >> exitFailure

            Rm (RmOptions {..}) ->
-              (runRmGHC $ do
-                  liftE $ rmGHCVer ghcVer
-                )
+              void
+                $   (runRmGHC $ do
+                      liftE $ rmGHCVer ghcVer
+                    )
                >>= \case
-                      VRight _ -> pure ExitSuccess
-                      VLeft  e -> do
-                        runLogger ($(logError) [i|#{e}|])
-                        pure $ ExitFailure 7
+                      VRight _ -> pure ()
+                      VLeft e ->
+                        runLogger ($(logError) [i|#{e}|]) >> exitFailure

-            DInfo ->
-              do
-                  (runDebugInfo $ liftE $ getDebugInfo)
+            DInfo -> do
+              void
+                $   (runDebugInfo $ do
+                      liftE $ getDebugInfo
+                    )
                >>= \case
-                      VRight dinfo -> do
-                        putStrLn $ prettyDebugInfo dinfo
-                        pure ExitSuccess
-                      VLeft e -> do
-                        runLogger ($(logError) [i|#{e}|])
-                        pure $ ExitFailure 8
+                      VRight dinfo -> putStrLn $ show dinfo
+                      VLeft e ->
+                        runLogger ($(logError) [i|#{e}|]) >> exitFailure

            Compile (CompileGHC CompileOptions {..}) ->
-              (runCompileGHC $ liftE $ compileGHC dls
-                                                  targetVer
-                                                  bootstrapGhc
-                                                  jobs
-                                                  buildConfig
-                                                  patchDir
-                )
+              void
+                $   (runCompileGHC $ do
+                      liftE
+                        $ compileGHC dls targetVer bootstrapGhc jobs buildConfig patchDir
+                    )
                >>= \case
-                      VRight _ -> do
+                      VRight _ ->
                        runLogger $ $(logInfo)
                          ("GHC successfully compiled and installed")
-                        pure ExitSuccess
-                      VLeft (V (AlreadyInstalled _ v)) -> do
+                      VLeft (V (AlreadyInstalled _ v)) ->
                        runLogger $ $(logWarn)
                          [i|GHC ver #{prettyVer v} already installed|]
-                        pure ExitSuccess
-                      VLeft (V (BuildFailed tmpdir e)) -> do
-                        case keepDirs of
-                          Never -> runLogger ($(logError) [i|Build failed with #{e}|])
-                          _ -> runLogger ($(logError) [i|Build failed with #{e}
-Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.
-Make sure to clean up #{tmpdir} afterwards.|])
-                        pure $ ExitFailure 9
-                      VLeft e -> do
-                        runLogger ($(logError) [i|#{e}|])
-                        pure $ ExitFailure 9
+                      VLeft (V (BuildFailed tmpdir e)) ->
+                        runLogger
+                            ($(logError) [i|Build failed with #{e}
+Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.|]
+                            )
+                          >> exitFailure
+                      VLeft e ->
+                        runLogger ($(logError) [i|#{e}|]) >> exitFailure

            Compile (CompileCabal CompileOptions {..}) ->
-              (runCompileCabal $ do
-                  liftE $ compileCabal dls targetVer bootstrapGhc jobs patchDir
-                )
+              void
+                $   (runCompileCabal $ do
+                      liftE $ compileCabal dls targetVer bootstrapGhc jobs patchDir
+                    )
                >>= \case
-                      VRight _ -> do
+                      VRight _ ->
+                        runLogger $ $(logInfo)
+                          ("Cabal successfully compiled and installed")
+                      VLeft (V (BuildFailed tmpdir e)) ->
                        runLogger
-                          ($(logInfo)
-                            "Cabal successfully compiled and installed"
-                          )
-                        pure ExitSuccess
-                      VLeft (V (BuildFailed tmpdir e)) -> do
-                        case keepDirs of
-                          Never -> runLogger ($(logError) [i|Build failed with #{e}|])
-                          _ -> runLogger ($(logError) [i|Build failed with #{e}
-Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.
-Make sure to clean up #{tmpdir} afterwards.|])
-                        pure $ ExitFailure 10
-                      VLeft e -> do
-                        runLogger ($(logError) [i|#{e}|])
-                        pure $ ExitFailure 10
+                            ($(logError) [i|Build failed with #{e}
+Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.|]
+                            )
+                          >> exitFailure
+                      VLeft e ->
+                        runLogger ($(logError) [i|#{e}|]) >> exitFailure

            Upgrade (uOpts) force -> do
              target <- case uOpts of
@ -999,74 +785,38 @@ Make sure to clean up #{tmpdir} afterwards.|])
                  bdir <- liftIO $ ghcupBinDir
                  pure (Just (bdir </> [rel|ghcup|]))

-              (runUpgrade $ (liftE $ upgradeGHCup dls target force)) >>= \case
-                VRight v' -> do
-                  let pretty_v = prettyVer v'
-                  runLogger $ $(logInfo)
-                    [i|Successfully upgraded GHCup to version #{pretty_v}|]
-                  pure ExitSuccess
-                VLeft (V NoUpdate) -> do
-                  runLogger $ $(logWarn) [i|No GHCup update available|]
-                  pure ExitSuccess
-                VLeft e -> do
-                  runLogger ($(logError) [i|#{e}|])
-                  pure $ ExitFailure 11
-
-            ToolRequirements ->
-              ( runLogger
-                $ runE
-                  @'[NoCompatiblePlatform , DistroNotFound , NoToolRequirements]
-                $ do
-                    platform <- liftE $ getPlatform
-                    req      <-
-                      (getCommonRequirements platform $ treq)
-                        ?? NoToolRequirements
-                    liftIO $ T.hPutStr stdout (prettyRequirements req)
-                )
+              void
+                $   (runUpgrade $ do
+                      liftE $ upgradeGHCup dls target force
+                    )
                >>= \case
-                      VRight _ -> pure ExitSuccess
-                      VLeft  e -> do
+                      VRight v' -> do
+                        let pretty_v = prettyVer v'
                        runLogger
-                          ($(logError)
-                            [i|Error getting tool requirements: #{e}|]
-                          )
-                        pure $ ExitFailure 12
+                          $ $(logInfo)
+                              [i|Successfully upgraded GHCup to version #{pretty_v}|]
+                      VLeft (V NoUpdate) ->
+                        runLogger $ $(logWarn)
+                          [i|No GHCup update available|]
+                      VLeft e ->
+                        runLogger ($(logError) [i|#{e}|]) >> exitFailure

-            ChangeLog (ChangeLogOptions {..}) -> do
-              let tool = fromMaybe GHC clTool
-                  ver' = maybe
-                    (Right Latest)
-                    (\case
-                      ToolVersion tv -> Left tv
-                      ToolTag     t  -> Right t
-                    )
-                    clToolVer
-                  muri = getChangeLog dls tool ver'
-              case muri of
-                Nothing -> do
-                  runLogger
-                    ($(logWarn)
-                      [i|Could not find ChangeLog for #{tool}, version #{either (T.unpack . prettyVer) show ver'}|]
-                    )
-                  pure ExitSuccess
-                Just uri -> do
-                  let uri' = T.unpack . decUTF8Safe . serializeURIRef' $ uri
-                  if clOpen
-                    then
-                      exec "xdg-open"
-                           True
-                           [serializeURIRef' uri]
-                           Nothing
-                           Nothing
-                        >>= \case
-                              Right _ -> pure ExitSuccess
-                              Left  e -> runLogger ($(logError) [i|#{e}|])
-                                >> pure (ExitFailure 13)
-                    else putStrLn uri' >> pure ExitSuccess
-
-          case res of
-            ExitSuccess        -> pure ()
-            ef@(ExitFailure _) -> exitWith ef
+            NumericVersion -> T.hPutStr stdout (prettyPVP ghcUpVer)
+            ToolRequirements -> (runLogger $ runE
+                      @'[ NoCompatiblePlatform
+                        , DistroNotFound
+                        , NoToolRequirements
+                        ] $ do
+                platform <- liftE $ getPlatform
+                req <- (getCommonRequirements platform $ treq)
+                         ?? NoToolRequirements
+                liftIO $ T.hPutStr stdout (prettyRequirements req))
+              >>= \case
+                    VRight r -> pure r
+                    VLeft e ->
+                      runLogger
+                          ($(logError) [i|Error getting tool requirements: #{e}|])
+                        >> exitFailure
  pure ()


@ -1077,115 +827,47 @@ fromVersion :: Monad m
            -> Excepts '[TagNotFound] m Version
 fromVersion av Nothing tool =
  getRecommended av tool ?? TagNotFound Recommended tool
-fromVersion av (Just (ToolVersion v)) _ = do
-  case pvp $ prettyVer v of
-    Left _ -> pure v
-    Right (PVP (major' :|[minor'])) ->
-      case getLatestGHCFor (fromIntegral major') (fromIntegral minor') av of
-        Just v' -> pure v'
-        Nothing -> pure v
-    Right _ -> pure v
+fromVersion _ (Just (ToolVersion v)) _ = pure v
 fromVersion av (Just (ToolTag Latest)) tool =
  getLatest av tool ?? TagNotFound Latest tool
 fromVersion av (Just (ToolTag Recommended)) tool =
  getRecommended av tool ?? TagNotFound Recommended tool
-fromVersion av (Just (ToolTag (Base pvp''))) GHC =
-  getLatestBaseVersion av pvp'' ?? TagNotFound (Base pvp'') GHC
-fromVersion _ (Just (ToolTag t')) tool =
-  throwE $ TagNotFound t' tool


-printListResult :: Bool -> [ListResult] -> IO ()
-printListResult raw lr = do
+printListResult :: [ListResult] -> IO ()
+printListResult lr = do
  -- https://gitlab.haskell.org/ghc/ghc/issues/8118
  setLocaleEncoding utf8

  let
    formatted =
      gridString
-          (  (if raw then [] else [column expand left def def])
-          ++ [ column expand left def def
-             , column expand left def def
-             , column expand left def def
-             , column expand left def def
-             ]
-          )
-        . (\x -> if raw
-            then x
-            else [color Green "", "Tool", "Version", "Tags", "Notes"] : x
-          )
+          [ column expand left def def
+          , column expand left def def
+          , column expand left def def
+          , column expand left def def
+          , column expand left def def
+          ]
        $ fmap
            (\ListResult {..} ->
-              let marks = if
-                    | lSet       -> (color Green "✔✔")
-                    | lInstalled -> (color Green "✓")
-                    | otherwise  -> (color Red "✗")
-              in  (if raw then [] else [marks])
-                    ++ [ fmap toLower . show $ lTool
-                       , T.unpack . prettyVer $ lVer
-                       , intercalate "," $ (fmap printTag $ sort lTag)
-                       , intercalate ","
-                       $  (if fromSrc then [color' Blue "compiled"] else mempty)
-                       ++ (if lStray then [color' Blue "stray"] else mempty)
-                       ]
+              [ if
+                | lSet       -> (color Green "✔✔")
+                | lInstalled -> (color Green "✓")
+                | otherwise  -> (color Red "✗")
+              , fmap toLower . show $ lTool
+              , T.unpack . prettyVer $ lVer
+              , intercalate "," $ ((fmap . fmap) toLower . fmap show $ lTag)
+              , if fromSrc then (color Blue "compiled") else mempty
+              ]
            )
            lr
  putStrLn $ formatted
- where
-  printTag Recommended        = color' Green "recommended"
-  printTag Latest             = color' Yellow "latest"
-  printTag (Base pvp'') = "base-" ++ T.unpack (prettyPVP pvp'')
-  printTag (UnknownTag t    ) = t
-  color' = case raw of
-    True  -> flip const
-    False -> color

-checkForUpdates :: (MonadThrow m, MonadIO m, MonadFail m, MonadLogger m)
-                => GHCupDownloads
-                -> m ()
+
+checkForUpdates :: (MonadFail m, MonadLogger m) => GHCupDownloads -> m ()
 checkForUpdates dls = do
  forM_ (getLatest dls GHCup) $ \l -> do
    (Right ghc_ver) <- pure $ version $ prettyPVP ghcUpVer
    when (l > ghc_ver)
      $ $(logWarn)
          [i|New GHCup version available: #{prettyVer l}. To upgrade, run 'ghcup upgrade'|]
-
-  forM_ (getLatest dls GHC) $ \l -> do
-    mghc_ver <- latestInstalled GHC
-    forM mghc_ver $ \ghc_ver ->
-      when (l > ghc_ver)
-        $ $(logWarn)
-            [i|New GHC version available: #{prettyVer l}. To upgrade, run 'ghcup install #{prettyVer l}'|]
-
-  forM_ (getLatest dls Cabal) $ \l -> do
-    mcabal_ver <- latestInstalled Cabal
-    forM mcabal_ver $ \cabal_ver ->
-      when (l > cabal_ver)
-        $ $(logWarn)
-            [i|New Cabal version available: #{prettyVer l}. To upgrade, run 'ghcup install-cabal #{prettyVer l}'|]
-
- where
-  latestInstalled tool = (fmap lVer . lastMay)
-    <$> (listVersions dls (Just tool) (Just ListInstalled))
-
-
-prettyDebugInfo :: DebugInfo -> String
-prettyDebugInfo DebugInfo {..} = [i|Debug Info
-==========
-GHCup base dir: #{toFilePath diBaseDir}
-GHCup bin dir: #{toFilePath diBinDir}
-GHCup GHC directory: #{toFilePath diGHCDir}
-GHCup cache directory: #{toFilePath diCacheDir}
-Architecture: #{prettyArch diArch}
-Platform: #{prettyPlatform diPlatform}
-Version: #{describe_result}|]
- where
-  prettyArch :: Architecture -> String
-  prettyArch A_64 = "amd64"
-  prettyArch A_32 = "i386"
-  prettyPlatform :: PlatformResult -> String
-  prettyPlatform PlatformResult { _platform = plat, _distroVersion = Just v' }
-    = show plat <> ", " <> show v'
-  prettyPlatform PlatformResult { _platform = plat, _distroVersion = Nothing }
-    = show plat
-
--- a/8
+++ b/8
@ -31,10 +31,10 @@ download_ghcup() {
        "linux"|"Linux")
 			case "${_arch}" in
 				x86_64|amd64)
-					_url=https://downloads.haskell.org/~ghcup/0.1.4/x86_64-linux-ghcup-0.1.4
+					_url=https://downloads.haskell.org/~ghcup/0.1.3/x86_64-linux-ghcup-0.1.3
 					;;
 				i*86)
-					_url=https://downloads.haskell.org/~ghcup/0.1.4/i386-linux-ghcup-0.1.4
+					_url=https://downloads.haskell.org/~ghcup/0.1.3/i386-linux-ghcup-0.1.3
 					;;
 				*) die "Unknown architecture: ${_arch}"
 					;;
@ -50,7 +50,7 @@ download_ghcup() {
 				*) die "Unknown architecture: ${_arch}"
 					;;
 			esac
-			_url=https://downloads.haskell.org/~ghcup/0.1.4/x86_64-portbld-freebsd-ghcup-0.1.4
+			_url=https://downloads.haskell.org/~ghcup/0.1.3/x86_64-portbld-freebsd-ghcup-0.1.3
            ;;
        "Darwin"|"darwin")
 			case "${_arch}" in
@ -62,7 +62,7 @@ download_ghcup() {
 				*) die "Unknown architecture: ${_arch}"
 					;;
 			esac
-			_url=https://downloads.haskell.org/~ghcup/0.1.4/x86_64-apple-darwin-ghcup-0.1.4 ;;
+			_url=https://downloads.haskell.org/~ghcup/0.1.3/x86_64-apple-darwin-ghcup-0.1.3 ;;
        *) die "Unknown platform: ${_plat}"
 			;;
    esac
--- a/ghcup-0.0.1.json
+++ b/ghcup-0.0.1.json
@ -170,7 +170,6 @@
          "dlSubdir": "ghc-8.6.2",
          "dlUri": "https://downloads.haskell.org/~ghc/8.6.2/ghc-8.6.2-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.6.2/docs/html/users_guide/8.6.2-notes.html",
        "viTags": []
      },
      "8.0.2": {
@ -265,7 +264,6 @@
          "dlSubdir": "ghc-8.0.2",
          "dlUri": "https://downloads.haskell.org/~ghc/8.0.2/ghc-8.0.2-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.0.2/docs/html/users_guide/8.0.1-notes.html",
        "viTags": []
      },
      "8.6.4": {
@ -379,7 +377,6 @@
          "dlSubdir": "ghc-8.6.4",
          "dlUri": "https://downloads.haskell.org/~ghc/8.6.4/ghc-8.6.4-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.6.4/docs/html/users_guide/8.6.4-notes.html",
        "viTags": []
      },
      "8.4.1": {
@ -485,7 +482,6 @@
          "dlSubdir": "ghc-8.4.1",
          "dlUri": "https://downloads.haskell.org/~ghc/8.4.1/ghc-8.4.1-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.4.1/docs/html/users_guide/8.4.1-notes.html",
        "viTags": []
      },
      "8.6.3": {
@ -620,7 +616,6 @@
          "dlSubdir": "ghc-8.6.3",
          "dlUri": "https://downloads.haskell.org/~ghc/8.6.3/ghc-8.6.3-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.6.3/docs/html/users_guide/8.6.3-notes.html",
        "viTags": []
      },
      "8.10.1": {
@ -761,7 +756,6 @@
          "dlSubdir": "ghc-8.10.1",
          "dlUri": "https://downloads.haskell.org/~ghc/8.10.1/ghc-8.10.1-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.10.1/docs/html/users_guide/8.10.1-notes.html",
        "viTags": [
          "Latest"
        ]
@ -891,7 +885,6 @@
          "dlSubdir": "ghc-8.6.5",
          "dlUri": "https://downloads.haskell.org/~ghc/8.6.5/ghc-8.6.5-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.6.5/docs/html/users_guide/8.6.5-notes.html",
        "viTags": []
      },
      "8.4.2": {
@ -1012,7 +1005,6 @@
          "dlSubdir": "ghc-8.4.2",
          "dlUri": "https://downloads.haskell.org/~ghc/8.4.2/ghc-8.4.2-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.4.2/docs/html/users_guide/8.4.2-notes.html",
        "viTags": []
      },
      "8.8.1": {
@ -1140,7 +1132,6 @@
          "dlSubdir": "ghc-8.8.1",
          "dlUri": "https://downloads.haskell.org/~ghc/8.8.1/ghc-8.8.1-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.8.1/docs/html/users_guide/8.8.1-notes.html",
        "viTags": []
      },
      "8.4.3": {
@ -1254,7 +1245,6 @@
          "dlSubdir": "ghc-8.4.3",
          "dlUri": "https://downloads.haskell.org/~ghc/8.4.3/ghc-8.4.3-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.4.3/docs/html/users_guide/8.4.3-notes.html",
        "viTags": []
      },
      "8.6.1": {
@ -1375,7 +1365,6 @@
          "dlSubdir": "ghc-8.6.1",
          "dlUri": "https://downloads.haskell.org/~ghc/8.6.1/ghc-8.6.1-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.6.1/docs/html/users_guide/8.6.1-notes.html",
        "viTags": []
      },
      "8.8.2": {
@ -1503,7 +1492,6 @@
          "dlSubdir": "ghc-8.8.2",
          "dlUri": "https://downloads.haskell.org/~ghc/8.8.2/ghc-8.8.2-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.8.2/docs/html/users_guide/8.8.2-notes.html",
        "viTags": []
      },
      "7.10.3": {
@ -1630,7 +1618,6 @@
          "dlSubdir": "ghc-7.10.3",
          "dlUri": "https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/7.10.3/docs/html/users_guide/release-7-10-1.html",
        "viTags": []
      },
      "8.2.2": {
@ -1735,7 +1722,6 @@
          "dlSubdir": "ghc-8.2.2",
          "dlUri": "https://downloads.haskell.org/~ghc/8.2.2/ghc-8.2.2-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.2.2/docs/html/users_guide/8.2.2-notes.html",
        "viTags": []
      },
      "8.4.4": {
@ -1870,7 +1856,6 @@
          "dlSubdir": "ghc-8.4.4",
          "dlUri": "https://downloads.haskell.org/~ghc/8.4.4/ghc-8.4.4-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.4.4/docs/html/users_guide/8.4.4-notes.html",
        "viTags": []
      },
      "8.8.3": {
@ -1958,7 +1943,7 @@
          "A_32": {
            "Linux_Alpine": {
              "unknown_versioning": {
-                "dlHash": "7a5f41646d06777e75636291a1855d60a0984552bbdf33c3d107565d302f38a4",
+                "dlHash": "23779adb4cf4b314d0f8c66ee215ba6e74154c0768a573780475943544020bec",
                "dlSubdir": "ghc-8.8.3",
                "dlUri": "https://github.com/redneb/ghc-alt-libc/releases/download/ghc-8.8.3-musl/ghc-8.8.3-i386-unknown-linux-musl.tar.xz"
              }
@ -1998,7 +1983,6 @@
          "dlSubdir": "ghc-8.8.3",
          "dlUri": "https://downloads.haskell.org/~ghc/8.8.3/ghc-8.8.3-src.tar.xz"
        },
-        "viChangeLog": "https://downloads.haskell.org/ghc/8.8.3/docs/html/users_guide/8.8.3-notes.html",
        "viTags": [
          "Recommended"
        ]
@ -2038,7 +2022,6 @@
          "dlSubdir": "cabal-cabal-install-v3.0.0.0/cabal-install",
          "dlUri": "https://github.com/haskell/cabal/archive/cabal-install-v3.0.0.0.tar.gz"
        },
-        "viChangeLog": "https://downloads.haskell.org/~cabal/cabal-install-3.0.0.0/changelog",
        "viTags": []
      },
      "3.2.0.0": {
@ -2074,7 +2057,6 @@
          "dlSubdir": "cabal-cabal-install-v3.2.0.0/cabal-install",
          "dlUri": "https://github.com/haskell/cabal/archive/cabal-install-v3.2.0.0.tar.gz"
        },
-        "viChangeLog": "https://downloads.haskell.org/~cabal/cabal-install-3.2.0.0/changelog",
        "viTags": [
          "Recommended",
          "Latest"
@ -2127,48 +2109,46 @@
          "dlSubdir": "cabal-cabal-install-v2.4.1.0/cabal-install",
          "dlUri": "https://github.com/haskell/cabal/archive/cabal-install-v2.4.1.0.tar.gz"
        },
-        "viChangeLog": "https://downloads.haskell.org/~cabal/cabal-install-2.4.1.0/changelog",
        "viTags": []
      }
    },
    "GHCup": {
-      "0.1.4": {
+      "0.1.3": {
        "viArch": {
          "A_64": {
            "FreeBSD": {
              "unknown_versioning": {
-                "dlHash": "cda0b959f053abc04ab0a1b9919a505b8c9304e2898a291f527a370cb0e00731",
+                "dlHash": "2daa775d6fa307cb8123fa45ba20e2acd244cdb8cfb3f2b3c8a1aa3f3571c46f",
                "dlSubdir": null,
-                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.4/x86_64-portbld-freebsd-ghcup-0.1.4"
+                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.3/x86_64-portbld-freebsd-ghcup-0.1.3"
              }
            },
            "Darwin": {
              "unknown_versioning": {
-                "dlHash": "2422b79933ae037237ccb8f836417b90b3111d7931beb7ae8b9e33a1945c641e",
+                "dlHash": "a617b06619ec6e75d50dac53f36814c3cafd4dbeebe8cea46d9cd5842c0c94a9",
                "dlSubdir": null,
-                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.4/x86_64-apple-darwin-ghcup-0.1.4"
+                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.3/x86_64-apple-darwin-ghcup-0.1.3"
              }
            },
            "Linux_UnknownLinux": {
              "unknown_versioning": {
-                "dlHash": "78d69ed4c9a810a445af89ea25e4217a632799ecb427b06cd2320ffb574f555e",
+                "dlHash": "873f73b65cf5e399864b81ed597a0e14fa73e0c492429cd3a85fe0fdc585a4c8",
                "dlSubdir": null,
-                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.4/x86_64-linux-ghcup-0.1.4"
+                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.3/x86_64-linux-ghcup-0.1.3"
              }
            }
          },
          "A_32": {
            "Linux_UnknownLinux": {
              "unknown_versioning": {
-                "dlHash": "057cc1cc39abdacd92cb1d4fb44c850fd9c5398a36b893286248ac5c38bc0c70",
+                "dlHash": "ff76a6130d6ea869a65bed127255bfa1ddf6aa1bd690df99d872467422c08be0",
                "dlSubdir": null,
-                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.4/i386-linux-ghcup-0.1.4"
+                "dlUri": "https://downloads.haskell.org/~ghcup/0.1.3/i386-linux-ghcup-0.1.3"
              }
            }
          }
        },
        "viSourceDL": null,
-        "viChangeLog": "https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/CHANGELOG.md",
        "viTags": [
          "Recommended",
          "Latest"
--- a/ghcup-0.0.2.json
+++ b/ghcup-0.0.2.json
--- a/ghcup.cabal
+++ b/ghcup.cabal
@ -21,8 +21,8 @@ source-repository head
  type:     git
  location: https://gitlab.haskell.org/haskell/ghcup-hs.git

-flag internal-downloader
-  description: Compile the internal downloader, which links against OpenSSL
+flag Curl
+  description: Use curl instead of http-io-streams for download
  default:     False
  manual:      True

@ -279,9 +279,6 @@ library

  exposed-modules:
    GHCup
-    GHCup.Data.GHCupDownloads
-    GHCup.Data.GHCupInfo
-    GHCup.Data.ToolRequirements
    GHCup.Download
    GHCup.Download.Utils
    GHCup.Errors
@ -304,14 +301,15 @@ library
  -- other-extensions:
  hs-source-dirs:  lib

-  if flag(internal-downloader)
+  if !flag(curl)
    import:
      , HsOpenSSL
      , http-io-streams
      , io-streams
      , terminal-progress-bar
    exposed-modules: GHCup.Download.IOStreams
-    cpp-options:     -DINTERNAL_DOWNLOADER
+  else
+    cpp-options:     -DCURL

 executable ghcup
  import:
@ -328,10 +326,8 @@ executable ghcup
    , optparse-applicative
    , pretty-terminal
    , resourcet
-    , safe
    , string-interpolate
    , table-layout
-    , template-haskell
    , text
    , uri-bytestring
    , utf8-string
@ -346,10 +342,6 @@ executable ghcup
  hs-source-dirs:   app/ghcup
  default-language: Haskell2010

-  if flag(internal-downloader)
-    cpp-options:     -DINTERNAL_DOWNLOADER
-
-
 executable ghcup-gen
  import:
    config
@ -378,6 +370,9 @@ executable ghcup-gen
  --
  main-is:          Main.hs
  other-modules:
+    GHCupDownloads
+    GHCupInfo
+    ToolRequirements
    Validate

  -- other-extensions:
--- a/lib/GHCup.hs
+++ b/lib/GHCup.hs
@ -9,7 +9,6 @@
 {-# LANGUAGE TemplateHaskell       #-}
 {-# LANGUAGE TypeApplications      #-}
 {-# LANGUAGE TypeFamilies          #-}
-{-# LANGUAGE ViewPatterns          #-}

 module GHCup where

@ -97,15 +96,15 @@ installGHCBin bDls ver mpfReq = do
  lift $ $(logDebug) [i|Requested to install GHC with #{ver}|]
  whenM (liftIO $ toolAlreadyInstalled GHC ver)
    $ (throwE $ AlreadyInstalled GHC ver)
-  Settings {..}                <- lift ask
+  Settings {..} <- lift ask
  pfreq@(PlatformRequest {..}) <- maybe (liftE $ platformRequest) pure mpfReq

  -- download (or use cached version)
-  dlinfo                       <- lE $ getDownloadInfo GHC ver pfreq bDls
-  dl                           <- liftE $ downloadCached dlinfo Nothing
+  dlinfo        <- lE $ getDownloadInfo GHC ver pfreq bDls
+  dl            <- liftE $ downloadCached dlinfo Nothing

  -- unpack
-  tmpUnpack                    <- lift mkGhcupTmpDir
+  tmpUnpack     <- lift mkGhcupTmpDir
  liftE $ unpackToDir tmpUnpack dl
  void $ liftIO $ darwinNotarization _rPlatform tmpUnpack

@ -115,12 +114,24 @@ installGHCBin bDls ver mpfReq = do
  -- the subdir of the archive where we do the work
  let workdir = maybe tmpUnpack (tmpUnpack </>) (view dlSubdir dlinfo)

-  liftE $ runBuildAction tmpUnpack (Just ghcdir) (installGHC' workdir ghcdir)
+  -- Be careful about cleanup. We must catch both pure exceptions
+  -- as well as async ones.
+  flip onException
+       (liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
+    $ catchAllE
+        (\es -> do
+          liftIO (hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
+            >> throwE (BuildFailed workdir es)
+        )
+    $ installGHC' workdir ghcdir
+
+  -- only clean up dir if the build succeeded
+  liftIO $ deleteDirRecursive tmpUnpack

  liftE $ postGHCInstall ver

 where
-  -- | Install an unpacked GHC distribution. This only deals with the GHC build system and nothing else.
+    -- | Install an unpacked GHC distribution. This only deals with the GHC build system and nothing else.
  installGHC' :: (MonadLogger m, MonadIO m)
              => Path Abs      -- ^ Path to the unpacked GHC bindist (where the configure script resides)
              -> Path Abs      -- ^ Path to install to
@ -183,7 +194,7 @@ installCabalBin bDls ver mpfReq = do
  pure ()

 where
-  -- | Install an unpacked cabal distribution.
+    -- | Install an unpacked cabal distribution.
  installCabal' :: (MonadLogger m, MonadCatch m, MonadIO m)
                => Path Abs      -- ^ Path to the unpacked cabal bindist (where the executable resides)
                -> Path Abs      -- ^ Path to install to
@ -294,38 +305,25 @@ data ListResult = ListResult
  , lVer       :: Version
  , lTag       :: [Tag]
  , lInstalled :: Bool
-  , lSet       :: Bool -- ^ currently active version
-  , fromSrc    :: Bool -- ^ compiled from source
-  , lStray     :: Bool -- ^ not in download info
+  , lSet       :: Bool
+  , fromSrc    :: Bool
  }
-  deriving (Eq, Ord, Show)
+  deriving Show


-availableToolVersions :: GHCupDownloads -> Tool -> Map.Map Version [Tag]
-availableToolVersions av tool = view
-  (at tool % non Map.empty % to (fmap (_viTags)))
+availableToolVersions :: GHCupDownloads -> Tool -> [(Version, [Tag])]
+availableToolVersions av tool = toListOf
+  (ix tool % to (fmap (\(v, vi) -> (v, (_viTags vi))) . Map.toList) % folded)
  av


-- | List all versions from the download info, as well as stray
-- versions.
-listVersions :: (MonadLogger m, MonadIO m)
-             => GHCupDownloads
+listVersions :: GHCupDownloads
             -> Maybe Tool
             -> Maybe ListCriteria
-             -> m [ListResult]
+             -> IO [ListResult]
 listVersions av lt criteria = case lt of
  Just t -> do
-    -- get versions from GHCupDownloads
-    let avTools = availableToolVersions av t
-    lr <- filter' <$> forM (Map.toList avTools) (liftIO . toListResult t)
-
-    case t of
-      -- append stray GHCs
-      GHC -> do
-        slr <- strayGHCs avTools
-        pure $ (sort (slr ++ lr))
-      _ -> pure lr
+    filter' <$> forM (availableToolVersions av t) (toListResult t)
  Nothing -> do
    ghcvers   <- listVersions av (Just GHC) criteria
    cabalvers <- listVersions av (Just Cabal) criteria
@ -333,60 +331,21 @@ listVersions av lt criteria = case lt of
    pure (ghcvers <> cabalvers <> ghcupvers)

 where
-  strayGHCs :: (MonadLogger m, MonadIO m)
-            => Map.Map Version [Tag]
-            -> m [ListResult]
-  strayGHCs avTools = do
-    ghcdir <- liftIO $ ghcupGHCBaseDir
-    fs     <- liftIO $ liftIO $ hideErrorDef [NoSuchThing] [] $ getDirsFiles' ghcdir
-    fmap catMaybes $ forM fs $ \(toFilePath -> f) -> do
-      case version . decUTF8Safe $ f of
-        Right v' -> do
-          case Map.lookup v' avTools of
-            Just _  -> pure Nothing
-            Nothing -> do
-              lSet    <- fmap (maybe False (== v')) $ ghcSet
-              fromSrc <- liftIO $ ghcSrcInstalled v'
-              pure $ Just $ ListResult
-                { lTool      = GHC
-                , lVer       = v'
-                , lTag       = []
-                , lInstalled = True
-                , lStray     = maybe True (const False) (Map.lookup v' avTools)
-                , ..
-                }
-        Left e -> do
-          $(logWarn)
-            [i|Could not parse version of stray directory #{toFilePath ghcdir}/#{f}: #{e}|]
-          pure Nothing
-
  toListResult :: Tool -> (Version, [Tag]) -> IO ListResult
  toListResult t (v, tags) = case t of
    GHC -> do
      lSet       <- fmap (maybe False (== v)) $ ghcSet
      lInstalled <- ghcInstalled v
      fromSrc    <- ghcSrcInstalled v
-      pure ListResult { lVer = v, lTag = tags, lTool = t, lStray = False, .. }
+      pure ListResult { lVer = v, lTag = tags, lTool = t, .. }
    Cabal -> do
      lSet <- fmap (== v) $ cabalSet
      let lInstalled = lSet
-      pure ListResult { lVer    = v
-                      , lTag    = tags
-                      , lTool   = t
-                      , fromSrc = False
-                      , lStray  = False
-                      , ..
-                      }
+      pure ListResult { lVer = v, lTag = tags, lTool = t, fromSrc = False, .. }
    GHCup -> do
      let lSet       = prettyPVP ghcUpVer == prettyVer v
      let lInstalled = lSet
-      pure ListResult { lVer    = v
-                      , lTag    = tags
-                      , lTool   = t
-                      , fromSrc = False
-                      , lStray  = False
-                      , ..
-                      }
+      pure ListResult { lVer = v, lTag = tags, lTool = t, fromSrc = False, .. }


  filter' :: [ListResult] -> [ListResult]
@ -521,10 +480,20 @@ compileGHC dls tver bstrap jobs mbuildConfig patchdir = do
  let workdir = maybe id (flip (</>)) (view dlSubdir dlInfo) $ tmpUnpack
  ghcdir <- liftIO $ ghcupGHCDir tver

-  liftE $ runBuildAction
-    tmpUnpack
-    (Just ghcdir)
-    (compile bghc ghcdir workdir >> markSrcBuilt ghcdir workdir)
+  -- Be careful about cleanup. We must catch both pure exceptions
+  -- as well as async ones.
+  flip onException
+       (liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
+    $ catchAllE
+        (\es ->
+          liftIO (hideError doesNotExistErrorType $ deleteDirRecursive ghcdir)
+            >> throwE (BuildFailed workdir es)
+        )
+    $ compile bghc ghcdir workdir
+  markSrcBuilt ghcdir workdir
+
+  -- only clean up dir if the build succeeded
+  liftIO $ deleteDirRecursive tmpUnpack

  reThrowAll GHCupSetError $ postGHCInstall tver
  pure ()
@ -644,11 +613,7 @@ compileCabal dls tver bghc jobs patchdir = do

  let workdir = maybe id (flip (</>)) (view dlSubdir dlInfo) $ tmpUnpack

-
-  liftE $ runBuildAction
-    tmpUnpack
-    Nothing
-    (compile workdir)
+  reThrowAll (BuildFailed workdir) $ compile workdir

  -- only clean up dir if the build succeeded
  liftIO $ deleteDirRecursive tmpUnpack
--- a/lib/GHCup/Download.hs
+++ b/lib/GHCup/Download.hs
@ -11,7 +11,7 @@

 module GHCup.Download where

-#if defined(INTERNAL_DOWNLOADER)
+#if !defined(CURL)
 import           GHCup.Download.IOStreams
 import           GHCup.Download.Utils
 #endif
@ -35,7 +35,7 @@ import           Control.Monad.Reader
 import           Control.Monad.Trans.Resource
                                         hiding ( throwM )
 import           Data.Aeson
-#if defined(INTERNAL_DOWNLOADER)
+#if !defined(CURL)
 import           Data.ByteString                ( ByteString )
 import           Data.CaseInsensitive           ( CI )
 #endif
@ -43,11 +43,10 @@ import           Data.Maybe
 import           Data.String.Interpolate
 import           Data.Time.Clock
 import           Data.Time.Clock.POSIX
-#if defined(INTERNAL_DOWNLOADER)
+#if !defined(CURL)
 import           Data.Time.Format
 #endif
 import           Data.Versions
-import           Data.Word8
 import           GHC.IO.Exception
 import           HPath
 import           HPath.IO                      as HIO
@ -58,14 +57,12 @@ import           Prelude                 hiding ( abs
                                                , writeFile
                                                )
 import           System.IO.Error
-import           System.Posix.Env.ByteString    ( getEnv )
 import           URI.ByteString

 import qualified Crypto.Hash.SHA256            as SHA256
-import qualified Data.ByteString               as BS
 import qualified Data.ByteString.Base16        as B16
 import qualified Data.ByteString.Lazy          as L
-#if defined(INTERNAL_DOWNLOADER)
+#if !defined(CURL)
 import qualified Data.CaseInsensitive          as CI
 import qualified Data.Map.Strict               as M
 import qualified Data.Text                     as T
@ -85,48 +82,6 @@ import qualified System.Posix.RawFilePath.Directory
    ------------------


-- | Like 'getDownloads', but tries to fall back to
-- cached ~/.ghcup/cache/ghcup-<format-ver>.json
-getDownloadsF :: ( FromJSONKey Tool
-                 , FromJSONKey Version
-                 , FromJSON VersionInfo
-                 , MonadIO m
-                 , MonadCatch m
-                 , MonadLogger m
-                 , MonadThrow m
-                 , MonadFail m
-                 , MonadReader Settings m
-                 )
-              => URLSource
-              -> Excepts
-                   '[JSONError , DownloadFailed , FileDoesNotExistError]
-                   m
-                   GHCupInfo
-getDownloadsF urlSource = do
-  case urlSource of
-    GHCupURL ->
-      liftE
-        $ handleIO (\_ -> readFromCache)
-        $ catchE @_ @'[JSONError , FileDoesNotExistError]
-            (\(DownloadFailed _) -> readFromCache)
-        $ getDownloads urlSource
-    (OwnSource _) -> liftE $ getDownloads urlSource
-    (OwnSpec   _) -> liftE $ getDownloads urlSource
- where
-  readFromCache = do
-    lift $ $(logWarn)
-      [i|Could not get download info, trying cached version (this may not be recent!)|]
-    let path = view pathL' ghcupURL
-    cacheDir  <- liftIO $ ghcupCacheDir
-    json_file <- (cacheDir </>) <$> urlBaseName path
-    bs        <-
-      handleIO' NoSuchThing
-                (\_ -> throwE $ FileDoesNotExistError (toFilePath json_file))
-      $ liftIO
-      $ readFile json_file
-    lE' JSONDecodeError $ eitherDecode' bs
-
-
 -- | Downloads the download information! But only if we need to ;P
 getDownloads :: ( FromJSONKey Tool
                , FromJSONKey Version
@ -136,7 +91,6 @@ getDownloads :: ( FromJSONKey Tool
                , MonadLogger m
                , MonadThrow m
                , MonadFail m
-                , MonadReader Settings m
                )
             => URLSource
             -> Excepts '[JSONError , DownloadFailed] m GHCupInfo
@ -162,12 +116,7 @@ getDownloads urlSource = do
  --
  -- Always save the local file with the mod time of the remote file.
  smartDl :: forall m1
-           . ( MonadCatch m1
-             , MonadIO m1
-             , MonadFail m1
-             , MonadLogger m1
-             , MonadReader Settings m1
-             )
+           . (MonadCatch m1, MonadIO m1, MonadFail m1, MonadLogger m1)
          => URI
          -> Excepts
               '[ FileDoesNotExistError
@ -199,38 +148,31 @@ getDownloads urlSource = do
              Just modTime -> do
                fileMod <- liftIO $ getModificationTime json_file
                if modTime > fileMod
-                  then dlWithMod modTime json_file
+                  then do
+                    bs <- liftE $ downloadBS uri'
+                    liftIO $ writeFileWithModTime modTime json_file bs
+                    pure bs
                  else liftIO $ readFile json_file
              Nothing -> do
                lift $ $(logDebug) [i|Unable to get/parse Last-Modified header|]
-                dlWithoutMod json_file
+                liftIO $ deleteFile json_file
+                liftE $ downloadBS uri'
          else -- access in less than 5 minutes, re-use file
               liftIO $ readFile json_file
      else do
        liftIO $ createDirIfMissing newDirPerms cacheDir
        getModTime >>= \case
-          Just modTime -> dlWithMod modTime json_file
+          Just modTime -> do
+            bs <- liftE $ downloadBS uri'
+            liftIO $ writeFileWithModTime modTime json_file bs
+            pure bs
          Nothing -> do
-            -- although we don't know last-modified, we still save
-            -- it to a file, so we might use it in offline mode
            lift $ $(logDebug) [i|Unable to get/parse Last-Modified header|]
-            dlWithoutMod json_file
+            liftE $ downloadBS uri'

   where
-    dlWithMod modTime json_file = do
-      bs <- liftE $ downloadBS uri'
-      liftIO $ writeFileWithModTime modTime json_file bs
-      pure bs
-    dlWithoutMod json_file = do
-      bs <- liftE $ downloadBS uri'
-      liftIO $ hideError doesNotExistErrorType $ deleteFile json_file
-      liftIO $ writeFileL json_file (Just newFilePerms) bs
-      liftIO $ setModificationTime json_file (fromIntegral @Int 0)
-      pure bs
-
-
    getModTime = do
-#if !defined(INTERNAL_DOWNLOADER)
+#if defined(CURL)
      pure Nothing
 #else
      headers <-
@ -250,7 +192,7 @@ getDownloads urlSource = do
      True
      defaultTimeLocale
      "%a, %d %b %Y %H:%M:%S %Z"
-      (T.unpack . decUTF8Safe $ h)
+      (T.unpack . E.decodeUtf8 $ h)

 #endif

@ -314,7 +256,7 @@ download dli dest mfn
    liftIO $ copyFile fromFile destFile Strict
    pure destFile
  dl = do
-    let uri' = decUTF8Safe (serializeURIRef' (view dlUri dli))
+    let uri' = E.decodeUtf8 (serializeURIRef' (view dlUri dli))
    lift $ $(logInfo) [i|downloading: #{uri'}|]

    -- destination dir must exist
@ -329,19 +271,12 @@ download dli dest mfn
            (liftIO $ hideError doesNotExistErrorType $ deleteFile destFile)
              >> (throwE . DownloadFailed $ e)
          ) $ do
-              lift getDownloader >>= \case
-                Curl -> do
-                  o' <- liftIO getCurlOpts
-                  liftE $ lEM @_ @'[ProcessError] $ liftIO $ exec "curl" True
-                    (o' ++ ["-fL", "-o", toFilePath destFile, serializeURIRef' $ view dlUri dli]) Nothing Nothing
-                Wget -> do
-                  o' <- liftIO getWgetOpts
-                  liftE $ lEM @_ @'[ProcessError] $ liftIO $ exec "wget" True
-                    (o' ++ ["-O", toFilePath destFile , serializeURIRef' $ view dlUri dli]) Nothing Nothing
-#if defined(INTERNAL_DOWNLOADER)
-                Internal -> do
-                  (https, host, fullPath, port) <- liftE $ uriToQuadruple (view dlUri dli)
-                  liftE $ downloadToFile https host fullPath port destFile
+#if defined(CURL)
+              liftE $ lEM @_ @'[ProcessError] $ liftIO $ exec "curl" True
+                ["-fL", "-o", toFilePath destFile , serializeURIRef' $ view dlUri dli] Nothing Nothing
+#else
+              (https, host, fullPath, port) <- liftE $ uriToQuadruple (view dlUri dli)
+              liftE $ downloadToFile https host fullPath port destFile
 #endif

    liftE $ checkDigest dli destFile
@ -394,7 +329,7 @@ downloadCached dli mfn = do


 -- | This is used for downloading the JSON.
-downloadBS :: (MonadReader Settings m, MonadCatch m, MonadIO m, MonadLogger m)
+downloadBS :: (MonadCatch m, MonadIO m)
           => URI
           -> Excepts
                '[ FileDoesNotExistError
@ -421,63 +356,32 @@ downloadBS uri'
 where
  scheme = view (uriSchemeL' % schemeBSL') uri'
  path   = view pathL' uri'
-#if defined(INTERNAL_DOWNLOADER)
-  dl https = do
-#else
+#if defined(CURL)
  dl _ = do
-#endif
-    lift $ $(logDebug) [i|downloading: #{serializeURIRef' uri'}|]
-    lift getDownloader >>= \case
-      Curl -> do
-        o' <- liftIO getCurlOpts
-        let exe = [rel|curl|]
-            args = o' ++ ["-sSfL", serializeURIRef' uri']
-        liftIO (executeOut exe args Nothing) >>= \case
-          CapturedProcess ExitSuccess stdout _ -> do
-            pure $ L.fromStrict stdout
-          CapturedProcess (ExitFailure i') _ _ -> throwE $ NonZeroExit i' (toFilePath exe) args
-      Wget -> do
-        o' <- liftIO getWgetOpts
-        let exe = [rel|wget|]
-            args = o' ++ ["-qO-", serializeURIRef' uri']
-        liftIO (executeOut exe args Nothing) >>= \case
-          CapturedProcess ExitSuccess stdout _ -> do
-            pure $ L.fromStrict stdout
-          CapturedProcess (ExitFailure i') _ _ -> throwE $ NonZeroExit i' (toFilePath exe) args
-#if defined(INTERNAL_DOWNLOADER)
-      Internal -> do
-        (_, host', fullPath', port') <- liftE $ uriToQuadruple uri'
-        liftE $ downloadBS' https host' fullPath' port'
+    let exe = [rel|curl|]
+        args = ["-sSfL", serializeURIRef' uri']
+    liftIO (executeOut exe args Nothing) >>= \case
+      CapturedProcess ExitSuccess stdout _ -> do
+        pure $ L.fromStrict stdout
+      CapturedProcess (ExitFailure i') _ _ -> throwE $ NonZeroExit i' (toFilePath exe) args
+#else
+  dl https = do
+    (_, host', fullPath', port') <- liftE $ uriToQuadruple uri'
+    liftE $ downloadBS' https host' fullPath' port'
 #endif


-checkDigest :: (MonadIO m, MonadThrow m, MonadLogger m, MonadReader Settings m)
+checkDigest :: (MonadIO m, MonadLogger m, MonadReader Settings m)
            => DownloadInfo
            -> Path Abs
            -> Excepts '[DigestError] m ()
 checkDigest dli file = do
  verify <- lift ask <&> (not . noVerify)
  when verify $ do
-    p' <- toFilePath <$> basename file
+    let p' = toFilePath file
    lift $ $(logInfo) [i|verifying digest of: #{p'}|]
    c <- liftIO $ readFile file
-    cDigest <- throwEither . E.decodeUtf8' . B16.encode . SHA256.hashlazy $ c
-    let eDigest = view dlHash dli
+    let cDigest = E.decodeUtf8 . B16.encode . SHA256.hashlazy $ c
+        eDigest = view dlHash dli
    when ((cDigest /= eDigest) && verify) $ throwE (DigestError cDigest eDigest)

-
-- | Get additional curl args from env. This is an undocumented option.
-getCurlOpts :: IO [ByteString]
-getCurlOpts =
-  getEnv "GHCUP_CURL_OPTS" >>= \case
-    Just r  -> pure $ BS.split _space r
-    Nothing -> pure []
-
-
-- | Get additional wget args from env. This is an undocumented option.
-getWgetOpts :: IO [ByteString]
-getWgetOpts =
-  getEnv "GHCUP_WGET_OPTS" >>= \case
-    Just r  -> pure $ BS.split _space r
-    Nothing -> pure []
-
--- a/lib/GHCup/Download/IOStreams.hs
+++ b/lib/GHCup/Download/IOStreams.hs
@ -47,6 +47,7 @@ import           URI.ByteString
 import qualified Data.ByteString               as BS
 import qualified Data.ByteString.Lazy          as L
 import qualified Data.Map.Strict               as M
+import qualified Data.Text.Encoding            as E
 import qualified System.IO.Streams             as Streams


@ -145,7 +146,7 @@ downloadInternal = go (5 :: Int)

    downloadStream r i' = do
      let size = case getHeader r "Content-Length" of
-            Just x' -> case decimal $ decUTF8Safe x' of
+            Just x' -> case decimal $ E.decodeUtf8 x' of
              Left  _       -> 0
              Right (r', _) -> r'
            Nothing -> 0
--- a/lib/GHCup/Platform.hs
+++ b/lib/GHCup/Platform.hs
@ -39,6 +39,7 @@ import           System.Info
 import           Text.Regex.Posix

 import qualified Data.Text                     as T
+import qualified Data.Text.Encoding            as E

    --------------------------
    --[ Platform detection ]--
@ -83,13 +84,13 @@ getPlatform = do
        ( either (const Nothing) Just
          . versioning
          . getMajorVersion
-          . decUTF8Safe
+          . E.decodeUtf8
          )
          <$> getDarwinVersion
      pure $ PlatformResult { _platform = Darwin, _distroVersion = ver }
    "freebsd" -> do
      ver <-
-        (either (const Nothing) Just . versioning . decUTF8Safe)
+        (either (const Nothing) Just . versioning . E.decodeUtf8)
          <$> getFreeBSDVersion
      pure $ PlatformResult { _platform = FreeBSD, _distroVersion = ver }
    what -> throwE $ NoCompatiblePlatform what
@ -158,7 +159,7 @@ getLinuxDistro = do
    (Just _) <- findExecutable lsb_release_cmd
    name     <- fmap _stdOut $ executeOut lsb_release_cmd ["-si"] Nothing
    ver      <- fmap _stdOut $ executeOut lsb_release_cmd ["-sr"] Nothing
-    pure (decUTF8Safe name, Just $ decUTF8Safe ver)
+    pure (E.decodeUtf8 name, Just $ E.decodeUtf8 ver)

  try_lsb_release :: IO (Text, Maybe Text)
  try_lsb_release = do
@ -168,7 +169,7 @@ getLinuxDistro = do

  try_redhat_release :: IO (Text, Maybe Text)
  try_redhat_release = do
-    t <- fmap decUTF8Safe' $ readFile redhat_release
+    t <- fmap lBS2sT $ readFile redhat_release
    let nameRegex n =
          makeRegexOpts compIgnoreCase
                        execBlank
@ -191,4 +192,4 @@ getLinuxDistro = do
  try_debian_version :: IO (Text, Maybe Text)
  try_debian_version = do
    ver <- readFile debian_version
-    pure (T.pack "debian", Just . decUTF8Safe' $ ver)
+    pure (T.pack "debian", Just $ lBS2sT ver)
--- a/lib/GHCup/Types.hs
+++ b/lib/GHCup/Types.hs
@ -1,4 +1,3 @@
-{-# LANGUAGE CPP           #-}
 {-# LANGUAGE DeriveGeneric #-}

 module GHCup.Types where
@ -71,10 +70,9 @@ data Tool = GHC
 -- | All necessary information of a tool version, including
 -- source download and per-architecture downloads.
 data VersionInfo = VersionInfo
-  { _viTags      :: [Tag]              -- ^ version specific tag
-  , _viChangeLog :: Maybe URI
-  , _viSourceDL  :: Maybe DownloadInfo -- ^ source tarball
-  , _viArch      :: ArchitectureSpec   -- ^ descend for binary downloads per arch
+  { _viTags     :: [Tag]              -- ^ version specific tag
+  , _viSourceDL :: Maybe DownloadInfo -- ^ source tarball
+  , _viArch     :: ArchitectureSpec   -- ^ descend for binary downloads per arch
  }
  deriving (Eq, Show)

@ -82,9 +80,7 @@ data VersionInfo = VersionInfo
 -- | A tag. These are currently attached to a version of a tool.
 data Tag = Latest
         | Recommended
-         | Base PVP
-         | UnknownTag String  -- ^ used for upwardscompat
-         deriving (Ord, Eq, Show) -- FIXME: manual JSON instance
+         deriving (Ord, Eq, Show)


 data Architecture = A_64
@ -141,26 +137,12 @@ data URLSource = GHCupURL


 data Settings = Settings
-  { cache      :: Bool
-  , noVerify   :: Bool
-  , keepDirs   :: KeepDirs
-  , downloader :: Downloader
+  { cache    :: Bool
+  , noVerify :: Bool
  }
  deriving Show


-data KeepDirs = Always
-              | Errors
-              | Never
-  deriving (Eq, Show, Ord)
-
-data Downloader = Curl
-                | Wget
-#if defined(INTERNAL_DOWNLOADER)
-                | Internal
-#endif
-  deriving (Eq, Show, Ord)
-
 data DebugInfo = DebugInfo
  { diBaseDir  :: Path Abs
  , diBinDir   :: Path Abs
--- a/lib/GHCup/Types/JSON.hs
+++ b/lib/GHCup/Types/JSON.hs
@ -37,27 +37,14 @@ deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Tool
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''VSep
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''VUnit
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''VersionInfo
+deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Tag
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''DownloadInfo
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''GHCupInfo
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Requirements

-instance ToJSON Tag where
-  toJSON Latest = String "Latest"
-  toJSON Recommended = String "Recommended"
-  toJSON (Base pvp'') = String ("base-" <> prettyPVP pvp'')
-  toJSON (UnknownTag x) = String (T.pack x)
-
-instance FromJSON Tag where
-  parseJSON = withText "Tag" $ \t -> case T.unpack t of
-    "Latest" -> pure Latest
-    "Recommended" -> pure Recommended
-    ('b':'a':'s':'e':'-':ver') -> case pvp (T.pack ver') of
-                                    Right x -> pure $ Base x
-                                    Left e -> fail . show $ e
-    x -> pure (UnknownTag x)

 instance ToJSON URI where
-  toJSON = toJSON . decUTF8Safe . serializeURIRef'
+  toJSON = toJSON . decodeUtf8 . serializeURIRef'

 instance FromJSON URI where
  parseJSON = withText "URL" $ \t ->
@ -156,14 +143,6 @@ instance FromJSONKey Version where
    Right x -> pure x
    Left  e -> fail $ "Failure in Version (FromJSONKey)" <> show e

-instance ToJSON PVP where
-  toJSON = toJSON . prettyPVP
-
-instance FromJSON PVP where
-  parseJSON = withText "PVP" $ \t -> case pvp t of
-    Right x -> pure x
-    Left  e -> fail $ "Failure in PVP (FromJSON)" <> show e
-
 instance ToJSONKey Tool where
  toJSONKey = genericToJSONKey defaultJSONKeyOptions

@ -172,7 +151,7 @@ instance FromJSONKey Tool where

 instance ToJSON (Path Rel) where
  toJSON p = case and . fmap isAscii . BS.unpack $ fp of
-    True  -> toJSON . decUTF8Safe $ fp
+    True  -> toJSON . E.decodeUtf8 $ fp
    False -> String "/not/a/valid/path"
    where fp = toFilePath p

--- a/lib/GHCup/Utils.hs
+++ b/lib/GHCup/Utils.hs
@ -15,7 +15,6 @@ where

 import           GHCup.Errors
 import           GHCup.Types
-import           GHCup.Types.Optics
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.Dirs
 import           GHCup.Utils.File
@ -84,11 +83,9 @@ ghcLinkVersion = either (throwM . ParseError) pure . parseOnly parser
 where
  parser    = string "../ghc/" *> verParser <* string "/bin/ghc"
  verParser = many1' (notWord8 _slash) >>= \t ->
-    case
-        version (decUTF8Safe $ B.pack t)
-      of
-        Left  e -> fail $ show e
-        Right r -> pure r
+    case version $ E.decodeUtf8 $ B.pack t of
+      Left  e -> fail $ show e
+      Right r -> pure r


 -- e.g. ghc-8.6.5
@ -162,7 +159,7 @@ ghcSrcInstalled ver = do
  doesFileExist (ghcdir </> ghcUpSrcBuiltFile)


-ghcSet :: (MonadIO m) => m (Maybe Version)
+ghcSet :: (MonadIO m, MonadThrow m) => m (Maybe Version)
 ghcSet = do
  ghcBin <- (</> [rel|ghc|]) <$> liftIO ghcupBinDir

@ -182,7 +179,7 @@ cabalSet = do
  cabalbin <- (</> [rel|cabal|]) <$> liftIO ghcupBinDir
  mc       <- liftIO $ executeOut cabalbin ["--numeric-version"] Nothing
  let reportedVer = fst . B.spanEnd (== _lf) . _stdOut $ mc
-  case version $ decUTF8Safe reportedVer of
+  case version (E.decodeUtf8 reportedVer) of
    Left  e -> throwM e
    Right r -> pure r

@ -209,8 +206,7 @@ getGHCForMajor :: (MonadIO m, MonadThrow m)
 getGHCForMajor major' minor' = do
  p       <- liftIO $ ghcupGHCBaseDir
  ghcs    <- liftIO $ getDirsFiles' p
-  semvers <- forM ghcs $ \ghc ->
-    throwEither . semver =<< (throwEither . E.decodeUtf8' . toFilePath $ ghc)
+  semvers <- forM ghcs $ throwEither . semver . E.decodeUtf8 . toFilePath
  mapM (throwEither . version)
    . fmap prettySemVer
    . lastMay
@ -222,23 +218,6 @@ getGHCForMajor major' minor' = do
    $ semvers


-- | Get the latest available ghc for X.Y major version.
-getLatestGHCFor :: Int -- ^ major version component
-                -> Int -- ^ minor version component
-                -> GHCupDownloads
-                -> Maybe Version
-getLatestGHCFor major' minor' dls = do
-  join . fmap
-      (lastMay . filter
-        (\v -> case semver $ prettyVer v of
-                 Right SemVer{..} -> fromIntegral _svMajor == major' && fromIntegral _svMinor == minor'
-                 Left _ -> False
-        )
-      )
-    . preview (ix GHC % to Map.keys) $ dls
-
-
-


    -----------------
@ -253,9 +232,8 @@ unpackToDir :: (MonadLogger m, MonadIO m, MonadThrow m)
            -> Path Abs       -- ^ archive path
            -> Excepts '[UnknownArchive] m ()
 unpackToDir dest av = do
-  fp <- (decUTF8Safe . toFilePath) <$> basename av
-  let dfp = decUTF8Safe . toFilePath $ dest
-  lift $ $(logInfo) [i|Unpacking: #{fp} to #{dfp}|]
+  let fp = E.decodeUtf8 (toFilePath av)
+  lift $ $(logInfo) [i|Unpacking: #{fp}|]
  fn <- toFilePath <$> basename av
  let untar = Tar.unpack (toFilePath dest) . Tar.read

@ -280,25 +258,21 @@ unpackToDir dest av = do
    ------------


-- | 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)
-getTagged tag =
-  ( to (Map.filter (\VersionInfo {..} -> elem tag _viTags))
-  % to Map.toDescList
-  % _head
+-- | Get the tool versions that have this tag.
+getTagged :: GHCupDownloads -> Tool -> Tag -> [Version]
+getTagged av tool tag = toListOf
+  ( ix tool
+  % to (Map.filter (\VersionInfo {..} -> elem tag _viTags))
+  % to Map.keys
+  % folded
  )
+  av

 getLatest :: GHCupDownloads -> Tool -> Maybe Version
-getLatest av tool = headOf (ix tool % getTagged Latest % to fst) $ av
+getLatest av tool = headOf folded $ getTagged av tool Latest

 getRecommended :: GHCupDownloads -> Tool -> Maybe Version
-getRecommended av tool = headOf (ix tool % getTagged Recommended % to fst) $ av
-
-
-- | Gets the latest GHC with a given base version.
-getLatestBaseVersion :: GHCupDownloads -> PVP -> Maybe Version
-getLatestBaseVersion av pvpVer = headOf (ix GHC % getTagged (Base pvpVer) % to fst) av
+getRecommended av tool = headOf folded $ getTagged av tool Recommended



@ -311,10 +285,6 @@ getCache :: MonadReader Settings m => m Bool
 getCache = ask <&> cache


-getDownloader :: MonadReader Settings m => m Downloader
-getDownloader = ask <&> downloader
-
-

    -------------
    --[ Other ]--
@ -398,52 +368,3 @@ darwinNotarization Darwin path = exec
  Nothing
  Nothing
 darwinNotarization _ _ = pure $ Right ()
-
-
-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
-
-
-- | 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 :: (Show (V e), MonadReader Settings m, MonadIO m, MonadMask m)
-               => Path Abs          -- ^ build directory
-               -> Maybe (Path Abs)  -- ^ install location (e.g. for GHC)
-               -> Excepts e m ()
-               -> Excepts '[BuildFailed] m ()
-runBuildAction bdir instdir action = do
-  Settings {..} <- lift ask
-  flip
-      onException
-      (do
-        forM_ instdir $ \dir ->
-          liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive dir
-        when (keepDirs == Never)
-          $ liftIO
-          $ hideError doesNotExistErrorType
-          $ deleteDirRecursive bdir
-      )
-    $ catchAllE
-        (\es -> do
-          forM_ instdir $ \dir ->
-            liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive dir
-          when (keepDirs == Never)
-            $ liftIO
-            $ hideError doesNotExistErrorType
-            $ deleteDirRecursive bdir
-          throwE (BuildFailed bdir es)
-        )
-    $ action
-
-  when (keepDirs == Never || keepDirs == Errors) $ liftIO $ deleteDirRecursive
-    bdir
--- a/lib/GHCup/Utils/File.hs
+++ b/lib/GHCup/Utils/File.hs
@ -43,6 +43,8 @@ import           System.Posix.Types

 import qualified Control.Exception             as EX
 import qualified Data.Text                     as T
+import qualified Data.Text.Encoding            as E
+import qualified Data.Text.Encoding.Error      as E
 import qualified System.Posix.Process.ByteString
                                               as SPPB
 import           Streamly.External.Posix.DirStream
@ -199,7 +201,6 @@ execLogged exe spath args lfile chdir env = do
    lineAction ref rs bs' = do
      modifyIORef' ref (swapRegs bs')
      regs <- readIORef ref
-      void $ SPIB.fdWrite fileFd (bs' <> "\n")
      forM (zip regs rs) $ \(bs, r) -> do
        setConsoleRegion r $ do
          w <- consoleWidth
@ -207,10 +208,12 @@ execLogged exe spath args lfile chdir env = do
            . T.pack
            . color Blue
            . T.unpack
-            . decUTF8Safe
+            . E.decodeUtf8With E.lenientDecode
            . trim w
            . (\b -> "[ " <> toFilePath lfile <> " ] " <> b)
            $ bs
+        SPIB.fdWrite fileFd (bs <> "\n")
+

    swapRegs bs regs | length regs < size = regs ++ [bs]
                     | otherwise          = tail regs ++ [bs]
@ -368,7 +371,8 @@ searchPath paths needle = go paths
 where
  go [] = pure Nothing
  go (x : xs) =
-    hideErrorDefM [InappropriateType, PermissionDenied, NoSuchThing] (go xs)
+    hideErrorDefM PermissionDenied (go xs)
+      $ hideErrorDefM NoSuchThing (go xs)
      $ do
          dirStream <- openDirStream (toFilePath x)
          S.findM (\(_, p) -> isMatch x p) (dirContentsStream dirStream)
--- a/lib/GHCup/Utils/Prelude.hs
+++ b/lib/GHCup/Utils/Prelude.hs
@ -29,7 +29,6 @@ import qualified Data.ByteString.Lazy          as L
 import qualified Data.Strict.Maybe             as S
 import qualified Data.Text                     as T
 import qualified Data.Text.Encoding            as E
-import qualified Data.Text.Encoding.Error      as E
 import qualified Data.Text.Lazy                as TL
 import qualified Data.Text.Lazy.Builder        as B
 import qualified Data.Text.Lazy.Builder.Int    as B
@ -88,6 +87,10 @@ whileM_ ~action = void . whileM action
 guardM :: (Monad m, Alternative m) => m Bool -> m ()
 guardM ~f = guard =<< f

+lBS2sT :: L.ByteString -> Text
+lBS2sT = TL.toStrict . TLE.decodeUtf8
+
+

 handleIO' :: (MonadIO m, MonadCatch m)
          => IOErrorType
@ -165,14 +168,14 @@ liftIOException errType ex =
    . lift


-hideErrorDef :: [IOErrorType] -> a -> IO a -> IO a
-hideErrorDef errs def =
-  handleIO (\e -> if ioeGetErrorType e `elem` errs then pure def else ioError e)
+hideErrorDef :: IOErrorType -> a -> IO a -> IO a
+hideErrorDef err def =
+  handleIO (\e -> if err == ioeGetErrorType e then pure def else ioError e)


-hideErrorDefM :: [IOErrorType] -> IO a -> IO a -> IO a
-hideErrorDefM errs def =
-  handleIO (\e -> if ioeGetErrorType e `elem` errs then def else ioError e)
+hideErrorDefM :: IOErrorType -> IO a -> IO a -> IO a
+hideErrorDefM err def =
+  handleIO (\e -> if err == ioeGetErrorType e then def else ioError e)


 -- TODO: does this work?
@ -240,16 +243,4 @@ addToCurrentEnv adds = do


 pvpToVersion :: PVP -> Version
-pvpToVersion =
-  either (\_ -> error "Couldn't convert PVP to Version") id
-    . version
-    . prettyPVP
-
-
-- | Safe 'decodeUtf8With'. Replaces an invalid input byte with
-- the Unicode replacement character U+FFFD.
-decUTF8Safe :: ByteString -> Text
-decUTF8Safe = E.decodeUtf8With E.lenientDecode
-
-decUTF8Safe' :: L.ByteString -> Text
-decUTF8Safe' = TL.toStrict . TLE.decodeUtf8With E.lenientDecode
+pvpToVersion = either (\_ -> error "Couldn't convert PVP to Version") id . version . prettyPVP
--- a/lib/GHCup/Version.hs
+++ b/lib/GHCup/Version.hs
@ -9,14 +9,9 @@ import           Data.Versions
 import           URI.ByteString
 import           URI.ByteString.QQ

-import qualified Data.Text                     as T
-
 -- | This reflects the API version of the JSON.
 ghcupURL :: URI
-ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.2.json|]
+ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.1.json|]

 ghcUpVer :: PVP
 ghcUpVer = [pver|0.1.4|]
-
-numericVer :: String
-numericVer = T.unpack . prettyPVP $ ghcUpVer
--- a/shell-completions/bash
+++ b/shell-completions/bash
@ -1,14 +0,0 @@
-_ghcup()
-{
-    local CMDLINE
-    local IFS=$'\n'
-    CMDLINE=(--bash-completion-index $COMP_CWORD)
-
-    for arg in ${COMP_WORDS[@]}; do
-        CMDLINE=(${CMDLINE[@]} --bash-completion-word $arg)
-    done
-
-    COMPREPLY=( $(ghcup "${CMDLINE[@]}") )
-}
-
-complete -o filenames -F _ghcup ghcup
--- a/shell-completions/fish
+++ b/shell-completions/fish
@ -1,19 +0,0 @@
- function _ghcup
-    set -l cl (commandline --tokenize --current-process)
-    # Hack around fish issue #3934
-    set -l cn (commandline --tokenize --cut-at-cursor --current-process)
-    set -l cn (count $cn)
-    set -l tmpline --bash-completion-enriched --bash-completion-index $cn
-    for arg in $cl
-      set tmpline $tmpline --bash-completion-word $arg
-    end
-    for opt in (ghcup $tmpline)
-      if test -d $opt
-        echo -E "$opt/"
-      else
-        echo -E "$opt"
-      end
-    end
-end
-
-complete --no-files --command ghcup --arguments '(_ghcup)'
--- a/shell-completions/zsh
+++ b/shell-completions/zsh
@ -1,32 +0,0 @@
-#compdef ghcup
-
-local request
-local completions
-local word
-local index=$((CURRENT - 1))
-
-request=(--bash-completion-enriched --bash-completion-index $index)
-for arg in ${words[@]}; do
-  request=(${request[@]} --bash-completion-word $arg)
-done
-
-IFS=$'\n' completions=($( ghcup "${request[@]}" ))
-
-for word in $completions; do
-  local -a parts
-
-  # Split the line at a tab if there is one.
-  IFS=$'\t' parts=($( echo $word ))
-
-  if [[ -n $parts[2] ]]; then
-     if [[ $word[1] == "-" ]]; then
-       local desc=("$parts[1] ($parts[2])")
-       compadd -d desc -- $parts[1]
-     else
-       local desc=($(print -f  "%-019s -- %s" $parts[1] $parts[2]))
-       compadd -l -d desc -- $parts[1]
-     fi
-  else
-    compadd -f -- $word
-  fi
-done