Document distribution policies

This is optional for now. Fixes #367

.cirrus.yml

@@ -0,0 +1,23 @@
+freebsd_instance:
+  image_family: freebsd-13-1
+
+task:
+  env:
+    GHC_VER: 9.2.4
+    CABAL_VER: 3.6.2.0
+    ARTIFACT: "x86_64-portbld-freebsd-ghcup"
+    ARCH: 64
+    RUNNER_OS: FreeBSD
+    DISTRO: na
+    GITHUB_WORKSPACE: ${CIRRUS_WORKING_DIR}
+    JSON_VERSION: "0.0.7"
+    CIRRUS_CLONE_SUBMODULES: true
+    AWS_ACCESS_KEY_ID: ENCRYPTED[3e99c4ac040871f213abd616ec66952d954dc289cdd97772f88e58a74d08a2250133437780fe98b7aedf7ef1fb32f5eb]
+    AWS_SECRET_ACCESS_KEY: ENCRYPTED[5910cfd77a922ff7fc06eeb6a6b9f79d4867863e541f06eb2c4cfecae0613650e3e0588373fa8d9249d295d76cf9cb3b]
+    S3_HOST: ENCRYPTED[ce961780a33159f7d1d8046956b5ac6ebc3bfc8149428e5f538576cda51d9f3d0c35b79cdd1e325793639ff6e31f889d]
+  install_script: pkg install -y ghc hs-cabal-install git bash misc/compat10x misc/compat11x misc/compat12x gmake
+  script:
+    - bash .github/scripts/build.sh
+    - bash .github/scripts/test.sh
+  binaries_artifacts:
+    path: "out/*"

.github/ghcup-run.files

@@ -0,0 +1,37 @@
+.
+./cabal
+./ghc
+./ghc-8.10.7
+./ghc-pkg
+./ghc-pkg-8.10.7
+./ghci
+./ghci-8.10.7
+./haddock
+./haddock-8.10.7
+./haskell-language-server-8.10.6
+./haskell-language-server-8.10.6~1.6.1.0
+./haskell-language-server-8.10.7
+./haskell-language-server-8.10.7~1.6.1.0
+./haskell-language-server-8.6.5
+./haskell-language-server-8.6.5~1.6.1.0
+./haskell-language-server-8.8.4
+./haskell-language-server-8.8.4~1.6.1.0
+./haskell-language-server-9.0.1
+./haskell-language-server-9.0.1~1.6.1.0
+./haskell-language-server-9.0.2
+./haskell-language-server-9.0.2~1.6.1.0
+./haskell-language-server-9.2.1
+./haskell-language-server-9.2.1~1.6.1.0
+./haskell-language-server-wrapper
+./haskell-language-server-wrapper-1.6.1.0
+./hp2ps
+./hp2ps-8.10.7
+./hpc
+./hpc-8.10.7
+./hsc2hs
+./hsc2hs-8.10.7
+./runghc
+./runghc-8.10.7
+./runhaskell
+./runhaskell-8.10.7
+./stack

.github/ghcup-run.files.alpine

@@ -0,0 +1,31 @@
+.
+./cabal
+./ghc
+./ghc-8.10.7
+./ghc-pkg
+./ghc-pkg-8.10.7
+./ghci
+./ghci-8.10.7
+./haddock
+./haddock-8.10.7
+./haskell-language-server-8.10.7
+./haskell-language-server-8.10.7~1.6.1.0
+./haskell-language-server-8.8.4
+./haskell-language-server-8.8.4~1.6.1.0
+./haskell-language-server-9.0.2
+./haskell-language-server-9.0.2~1.6.1.0
+./haskell-language-server-9.2.1
+./haskell-language-server-9.2.1~1.6.1.0
+./haskell-language-server-wrapper
+./haskell-language-server-wrapper-1.6.1.0
+./hp2ps
+./hp2ps-8.10.7
+./hpc
+./hpc-8.10.7
+./hsc2hs
+./hsc2hs-8.10.7
+./runghc
+./runghc-8.10.7
+./runhaskell
+./runhaskell-8.10.7
+./stack

.github/ghcup-run.files.windows

@@ -0,0 +1,81 @@
+.
+./cabal.exe
+./cabal.shim
+./ghc-8.10.7.exe
+./ghc-8.10.7.shim
+./ghc-pkg-8.10.7.exe
+./ghc-pkg-8.10.7.shim
+./ghc-pkg.exe
+./ghc-pkg.shim
+./ghc.exe
+./ghc.shim
+./ghci-8.10.7.exe
+./ghci-8.10.7.shim
+./ghci.exe
+./ghci.shim
+./ghcii-8.10.7.sh-8.10.7.exe
+./ghcii-8.10.7.sh-8.10.7.shim
+./ghcii-8.10.7.sh.exe
+./ghcii-8.10.7.sh.shim
+./ghcii.sh-8.10.7.exe
+./ghcii.sh-8.10.7.shim
+./ghcii.sh.exe
+./ghcii.sh.shim
+./haddock-8.10.7.exe
+./haddock-8.10.7.shim
+./haddock.exe
+./haddock.shim
+./haskell-language-server-8.10.6.exe
+./haskell-language-server-8.10.6.shim
+./haskell-language-server-8.10.6~1.6.1.0.exe
+./haskell-language-server-8.10.6~1.6.1.0.shim
+./haskell-language-server-8.10.7.exe
+./haskell-language-server-8.10.7.shim
+./haskell-language-server-8.10.7~1.6.1.0.exe
+./haskell-language-server-8.10.7~1.6.1.0.shim
+./haskell-language-server-8.6.5.exe
+./haskell-language-server-8.6.5.shim
+./haskell-language-server-8.6.5~1.6.1.0.exe
+./haskell-language-server-8.6.5~1.6.1.0.shim
+./haskell-language-server-8.8.4.exe
+./haskell-language-server-8.8.4.shim
+./haskell-language-server-8.8.4~1.6.1.0.exe
+./haskell-language-server-8.8.4~1.6.1.0.shim
+./haskell-language-server-9.0.1.exe
+./haskell-language-server-9.0.1.shim
+./haskell-language-server-9.0.1~1.6.1.0.exe
+./haskell-language-server-9.0.1~1.6.1.0.shim
+./haskell-language-server-9.0.2.exe
+./haskell-language-server-9.0.2.shim
+./haskell-language-server-9.0.2~1.6.1.0.exe
+./haskell-language-server-9.0.2~1.6.1.0.shim
+./haskell-language-server-9.2.1.exe
+./haskell-language-server-9.2.1.shim
+./haskell-language-server-9.2.1~1.6.1.0.exe
+./haskell-language-server-9.2.1~1.6.1.0.shim
+./haskell-language-server-wrapper-1.6.1.0.exe
+./haskell-language-server-wrapper-1.6.1.0.shim
+./haskell-language-server-wrapper.exe
+./haskell-language-server-wrapper.shim
+./hp2ps-8.10.7.exe
+./hp2ps-8.10.7.shim
+./hp2ps.exe
+./hp2ps.shim
+./hpc-8.10.7.exe
+./hpc-8.10.7.shim
+./hpc.exe
+./hpc.shim
+./hsc2hs-8.10.7.exe
+./hsc2hs-8.10.7.shim
+./hsc2hs.exe
+./hsc2hs.shim
+./runghc-8.10.7.exe
+./runghc-8.10.7.shim
+./runghc.exe
+./runghc.shim
+./runhaskell-8.10.7.exe
+./runhaskell-8.10.7.shim
+./runhaskell.exe
+./runhaskell.shim
+./stack.exe
+./stack.shim

.github/scripts/bootstrap.sh

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+#!/usr/bin/env bash
+
+set -eux
+
+. .github/scripts/prereq.sh
+
+mkdir -p "$CI_PROJECT_DIR"/.local/bin
+
+git describe --always
+
+### build
+
+./scripts/bootstrap/bootstrap-haskell
+
+[ "$(ghc --numeric-version)" = "${BOOTSTRAP_HASKELL_GHC_VERSION}" ]
+

.github/scripts/build.sh

@@ -0,0 +1,76 @@
+#!/bin/sh
+
+set -eux
+
+. .github/scripts/prereq.sh
+. .github/scripts/common.sh
+
+
+# ensure ghcup
+if ! command -v ghcup ; then
+	install_ghcup
+fi
+
+# ensure cabal-cache
+if ! cabal-cache version ; then
+	download_cabal_cache "$HOME/.local/bin/cabal-cache"
+fi
+
+# ensure ghc
+if [ "${RUNNER_OS}" != "FreeBSD" ] ; then
+	if [ "${DISTRO}" != "Debian" ] ; then # ! armv7 or aarch64 linux
+		if ! "ghc-${GHC_VER}" --numeric-version ; then
+			ghcup -v install ghc --set --force "$GHC_VER"
+		fi
+		if [ "$(cabal --numeric-version || true)" != "${CABAL_VER}" ] ; then
+			ghcup -v install cabal --force "$CABAL_VER"
+		fi
+		ghc --version
+		cabal --version
+		GHC="ghc-${GHC_VER}"
+	else
+		if [ "$(cabal --numeric-version || true)" != "${CABAL_VER}" ] ; then
+			ghcup -v install cabal --force "$CABAL_VER"
+		fi
+		cabal --version
+		GHC="ghc"
+	fi
+else
+	ghc --version
+	cabal --version
+	GHC="ghc"
+fi
+
+git_describe
+
+
+# build
+ecabal update
+
+if [ "${RUNNER_OS}" = "Linux" ] ; then
+	if [ "${ARCH}" = "32" ] ; then
+		build_with_cache -w "${GHC}" --ghc-options='-split-sections -optl-static' -ftui --enable-tests
+	elif [ "${ARCH}" = "64" ] ; then
+		build_with_cache -w "${GHC}" --ghc-options='-split-sections -optl-static' -ftui --enable-tests
+	else
+		build_with_cache -w "${GHC}" -ftui --enable-tests
+	fi
+elif [ "${RUNNER_OS}" = "FreeBSD" ] ; then
+	build_with_cache -w "${GHC}" --ghc-options='-split-sections' --constraint="zlib +bundled-c-zlib" --constraint="zip +disable-zstd" -ftui --enable-tests
+elif [ "${RUNNER_OS}" = "Windows" ] ; then
+	build_with_cache -w "${GHC}" --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" --enable-tests
+else
+	build_with_cache -w "${GHC}" --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" -ftui --enable-tests
+fi
+
+
+# set up artifacts
+mkdir -p out
+binary=$(cabal list-bin ghcup)
+binary_test=$(cabal list-bin ghcup-test)
+ver=$("${binary}" --numeric-version)
+strip_binary "${binary}"
+cp "${binary}" "out/${ARTIFACT}-${ver}"
+cp "${binary_test}" "out/test-${ARTIFACT}-${ver}"
+cp ./dist-newstyle/cache/plan.json "out/${ARTIFACT}.plan.json"
+

.github/scripts/common.sh

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+#!/bin/sh
+
+if [ "${RUNNER_OS}" = "Windows" ] ; then
+	ext=".exe"
+else
+	ext=''
+fi
+
+ecabal() {
+	cabal "$@"
+}
+
+sync_from_retry() {
+	if [ "${RUNNER_OS}" != "Windows" ] ; then
+		cabal_store_path="$(dirname "$(cabal help user-config | tail -n 1 | xargs)")/store"
+	else
+		cabal_store_path="${CABAL_DIR}/store"
+	fi
+
+    sync_from || { sleep 9 ; rm -rf "${cabal_store_path:?}"/* ; sync_from || { sleep 20 ; rm -rf "${cabal_store_path:?}"/* ; sync_from ; } }
+}
+
+sync_from() {
+	if [ "${RUNNER_OS}" != "Windows" ] ; then
+		cabal_store_path="$(dirname "$(cabal help user-config | tail -n 1 | xargs)")/store"
+	fi
+
+	cabal-cache sync-from-archive \
+		--host-name-override=${S3_HOST} \
+		--host-port-override=443 \
+		--host-ssl-override=True \
+		--region us-west-2 \
+		$([ "${RUNNER_OS}" != "Windows" ] && echo --store-path="$cabal_store_path") \
+		--archive-uri "s3://ghcup-hs/${RUNNER_OS}-${ARCH}-${DISTRO}"
+}
+
+sync_to_retry() {
+    sync_to || { sleep 9 ; sync_to || { sleep 20 ; sync_to ; } }
+}
+
+sync_to() {
+	if [ "${RUNNER_OS}" != "Windows" ] ; then
+		cabal_store_path="$(dirname "$(cabal help user-config | tail -n 1 | xargs)")/store"
+	fi
+
+	cabal-cache sync-to-archive \
+		--host-name-override=${S3_HOST} \
+		--host-port-override=443 \
+		--host-ssl-override=True \
+		--region us-west-2 \
+		$([ "${RUNNER_OS}" != "Windows" ] && echo --store-path="$cabal_store_path") \
+		--archive-uri "s3://ghcup-hs/${RUNNER_OS}-${ARCH}-${DISTRO}"
+}
+
+raw_eghcup() {
+	"$GHCUP_BIN/ghcup${ext}" -v -c "$@"
+}
+
+eghcup() {
+	if [ "${OS}" = "Windows" ] ; then
+		"$GHCUP_BIN/ghcup${ext}" -c -s "file:/$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml" "$@"
+	else
+		"$GHCUP_BIN/ghcup${ext}" -c -s "file://$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml" "$@"
+	fi
+}
+
+sha_sum() {
+	if [ "${OS}" = "FreeBSD" ] ; then
+		sha256 "$@"
+	else
+		sha256sum "$@"
+	fi
+
+}
+
+git_describe() {
+	git config --global --get-all safe.directory | grep '^\*$' || git config --global --add safe.directory "*"
+	git describe --always
+}
+
+download_cabal_cache() {
+	(
+	set -e
+	dest="$HOME/.local/bin/cabal-cache"
+    url=""
+	exe=""
+	cd /tmp
+	case "${RUNNER_OS}" in
+		"Linux")
+			case "${ARCH}" in
+				"32") url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/i386-linux-cabal-cache
+					;;
+				"64") url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/x86_64-linux-cabal-cache
+					;;
+				"ARM64") url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/aarch64-linux-cabal-cache
+					;;
+				"ARM") url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/armv7-linux-cabal-cache
+					;;
+			esac
+			;;
+		"FreeBSD")
+			url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/x86_64-portbld-freebsd-cabal-cache
+			;;
+		"Windows")
+			exe=".exe"
+			url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/x86_64-mingw64-cabal-cache
+			;;
+		"macOS")
+			case "${ARCH}" in
+				"ARM64") url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/aarch64-apple-darwin-cabal-cache
+					;;
+				"64") url=https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal-cache/experimental4/x86_64-apple-darwin-cabal-cache
+					;;
+			esac
+			;;
+	esac
+
+	if [ -n "${url}" ] ; then
+		case "${url##*.}" in
+			"gz")
+				curl -L -o - "${url}" | gunzip > cabal-cache${exe}
+				;;
+			*)
+				curl -o cabal-cache${exe} -L "${url}"
+				;;
+		esac
+		sha_sum cabal-cache${exe}
+		mv "cabal-cache${exe}" "${dest}${exe}"
+		chmod +x "${dest}${exe}"
+	fi
+    )
+}
+
+build_with_cache() {
+	ecabal configure "$@"
+	ecabal build --dependencies-only "$@" --dry-run
+	sync_from_retry
+	ecabal build --dependencies-only "$@" || sync_to_retry
+	sync_to_retry
+	ecabal build "$@"
+	sync_to_retry
+}
+
+install_ghcup() {
+	find "$GHCUP_INSTALL_BASE_PREFIX"
+	mkdir -p "$GHCUP_BIN"
+	mkdir -p "$GHCUP_BIN"/../cache
+
+	if [ "${RUNNER_OS}" = "FreeBSD" ] ; then
+		curl -o ghcup https://downloads.haskell.org/ghcup/tmp/x86_64-portbld-freebsd-ghcup-0.1.18.1
+		chmod +x ghcup
+		mv ghcup "$HOME/.local/bin/ghcup"
+	else
+		curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 sh
+	fi
+}
+
+strip_binary() {
+	(
+	set -e
+	local binary=$1
+	case "$(uname -s)" in
+		"Darwin"|"darwin")
+			;;
+		MSYS_*|MINGW*)
+			;;
+		*)
+			strip -s "${binary}"
+		   ;;
+   esac
+	)
+}

.github/scripts/hls.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+
+set -eux
+
+. .github/scripts/prereq.sh
+. .github/scripts/common.sh
+
+mkdir -p "$CI_PROJECT_DIR"/.local/bin
+
+### build
+
+
+
+if [ "${OS}" = "Windows" ] ; then
+	GHCUP_DIR="${GHCUP_INSTALL_BASE_PREFIX}"/ghcup
+else
+	GHCUP_DIR="${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup
+fi
+
+rm -rf "${GHCUP_DIR}"
+mkdir -p "${GHCUP_BIN}"
+
+ls -lah out
+find out
+cp "out/${ARTIFACT}"-* "$GHCUP_BIN/ghcup${ext}"
+chmod +x "$GHCUP_BIN/ghcup${ext}"
+echo "$PATH"
+
+"$GHCUP_BIN/ghcup${ext}" --version
+eghcup --version
+sha_sum "$GHCUP_BIN/ghcup${ext}"
+sha_sum "$(raw_eghcup --offline whereis ghcup)"
+
+git_describe
+
+eghcup install ghc "${GHC_VERSION}"
+eghcup install cabal
+
+ecabal update
+
+if ! command -v cabal-cache ; then
+	download_cabal_cache "$HOME/.local/bin/cabal-cache"
+fi
+
+if ! cabal-cache version ; then
+	build_cabal_cache "$HOME/.local/bin"
+fi
+
+
+eghcup debug-info
+
+(
+	cd /tmp
+	git clone --depth 1 --branch "${HLS_TARGET_VERSION}" \
+		https://github.com/haskell/haskell-language-server.git \
+		"haskell-language-server-${HLS_TARGET_VERSION}"
+	cd "haskell-language-server-${HLS_TARGET_VERSION}/"
+	ecabal configure -w "ghc-${GHC_VERSION}" --disable-profiling --disable-tests --jobs="$(nproc)"
+	ecabal build --dependencies-only -w "ghc-${GHC_VERSION}" --disable-profiling --disable-tests --jobs="$(nproc)" --dry-run
+	sync_from_retry
+	ecabal build --dependencies-only -w "ghc-${GHC_VERSION}" --disable-profiling --disable-tests --jobs="$(nproc)" || sync_to
+	sync_to_retry
+)
+
+eghcup -v compile hls -j "$(nproc)" -g "${HLS_TARGET_VERSION}" --ghc "${GHC_VERSION}"
+
+[ "$($(eghcup whereis hls "${HLS_TARGET_VERSION}") --numeric-version)" = "${HLS_TARGET_VERSION}" ] ||
+	[ "$($(eghcup whereis hls "${HLS_TARGET_VERSION}") --numeric-version | sed 's/.0$//')" = "${HLS_TARGET_VERSION}" ]
+
+# nuke
+eghcup nuke
+[ ! -e "${GHCUP_DIR}" ]
+

.github/scripts/prereq.sh

@@ -0,0 +1,66 @@
+#!/bin/sh
+
+mkdir -p "$HOME"/.local/bin
+
+export OS="$RUNNER_OS"
+export PATH="$HOME/.local/bin:$PATH"
+: "${APT_GET:=apt-get}"
+
+if [ "${RUNNER_OS}" = "Windows" ] ; then
+	# on windows use pwd to get unix style path
+	CI_PROJECT_DIR="$(pwd)"
+	export CI_PROJECT_DIR
+    export GHCUP_INSTALL_BASE_PREFIX="/c"
+    export GHCUP_BIN="$GHCUP_INSTALL_BASE_PREFIX/ghcup/bin"
+    export PATH="$GHCUP_BIN:$PATH"
+	export CABAL_DIR="C:\\Users\\runneradmin\\AppData\\Roaming\\cabal"
+else
+	export CI_PROJECT_DIR="${GITHUB_WORKSPACE}"
+    export GHCUP_INSTALL_BASE_PREFIX="$CI_PROJECT_DIR"
+    export GHCUP_BIN="$GHCUP_INSTALL_BASE_PREFIX/.ghcup/bin"
+    export PATH="$GHCUP_BIN:$PATH"
+    export CABAL_DIR="$CI_PROJECT_DIR/cabal"
+    export CABAL_CACHE="$CI_PROJECT_DIR/cabal-cache"
+fi
+
+if [ "${RUNNER_OS}" = "Linux" ] ; then
+	if [ "${DISTRO}" = "Alpine" ] ; then
+		:
+	elif [ "${DISTRO}" = "Ubuntu" ] ; then
+		export DEBIAN_FRONTEND=noninteractive
+		export TZ=Asia/Singapore
+		if [ "${ARCH}" = "ARM64" ] || [ "${ARCH}" = "ARM" ] ; then
+			:
+		else
+			${APT_GET} install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev libbz2-dev git wget lsb-release software-properties-common gnupg2 apt-transport-https gcc autoconf automake build-essential curl gzip
+		fi
+	elif [ "${DISTRO}" = "Debian" ] ; then
+		export DEBIAN_FRONTEND=noninteractive
+		export TZ=Asia/Singapore
+		${APT_GET} install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev libbz2-dev git wget lsb-release software-properties-common gnupg2 apt-transport-https gcc autoconf automake build-essential curl ghc gzip
+	fi
+elif [ "${RUNNER_OS}" = "macOS" ] ; then
+	if ! command -v brew ; then
+		[ -e "$HOME/.brew" ] ||
+			git clone --depth=1 https://github.com/Homebrew/brew "$HOME/.brew"
+		export PATH="$HOME/.brew/bin:$HOME/.brew/sbin:$PATH"
+		brew update
+	fi
+	if ! command -v git ; then
+		brew install git
+	fi
+	if ! command -v realpath ; then
+		brew install coreutils
+	fi
+
+    if [ "${ARCH}" = "ARM64" ] ; then
+		brew install llvm@11 autoconf automake
+		export PATH="$HOME/.brew/opt/llvm@11/bin:$PATH"
+		export CC="$HOME/.brew/opt/llvm@11/bin/clang"
+		export CXX="$HOME/.brew/opt/llvm@11/bin/clang++"
+		export LD=ld
+		export AR="$HOME/.brew/opt/llvm@11/bin/llvm-ar"
+		export RANLIB="$HOME/.brew/opt/llvm@11/bin/llvm-ranlib"
+	fi
+fi
+

.github/scripts/test.sh

@@ -0,0 +1,263 @@
+#!/usr/bin/env bash
+
+set -eux
+
+. .github/scripts/prereq.sh
+. .github/scripts/common.sh
+
+
+if [ "${OS}" = "Windows" ] ; then
+	GHCUP_DIR="${GHCUP_INSTALL_BASE_PREFIX}"/ghcup
+else
+	GHCUP_DIR="${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup
+fi
+
+git_describe
+
+rm -rf "${GHCUP_DIR}"
+mkdir -p "${GHCUP_BIN}"
+
+cp "out/${ARTIFACT}"-* "$GHCUP_BIN/ghcup${ext}"
+cp "out/test-${ARTIFACT}"-* "ghcup-test${ext}"
+chmod +x "$GHCUP_BIN/ghcup${ext}"
+chmod +x "ghcup-test${ext}"
+
+"$GHCUP_BIN/ghcup${ext}" --version
+eghcup --version
+sha_sum "$GHCUP_BIN/ghcup${ext}"
+sha_sum "$(raw_eghcup --offline whereis ghcup)"
+
+### Haskell test suite
+
+./ghcup-test${ext}
+rm ghcup-test${ext}
+
+### manual cli based testing
+
+eghcup --numeric-version
+
+eghcup install ghc ${GHC_VER}
+eghcup unset ghc ${GHC_VER}
+ls -lah "$(eghcup whereis -d ghc ${GHC_VER})"
+[ "`$(eghcup whereis ghc ${GHC_VER}) --numeric-version`" = "${GHC_VER}" ]
+[ "`eghcup run --ghc ${GHC_VER} -- ghc --numeric-version`" = "${GHC_VER}" ]
+[ "`ghcup run --ghc ${GHC_VER} -- ghc -e 'Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)'`" = "`$(ghcup whereis ghc ${GHC_VER}) -e 'Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)'`" ]
+eghcup set ghc ${GHC_VER}
+eghcup install cabal ${CABAL_VER}
+[ "`$(eghcup whereis cabal ${CABAL_VER}) --numeric-version`" = "${CABAL_VER}" ]
+eghcup unset cabal
+"$GHCUP_BIN"/cabal --version && exit 1 || echo yes
+
+# make sure no cabal is set when running 'ghcup run' to check that PATH propagages properly
+# https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/375
+[ "`eghcup run --cabal ${CABAL_VER} -- cabal --numeric-version`" = "${CABAL_VER}" ]
+eghcup set cabal ${CABAL_VER}
+
+[ "`$(eghcup whereis cabal ${CABAL_VER}) --numeric-version`" = "${CABAL_VER}" ]
+
+if [ "${OS}" != "FreeBSD" ] ; then
+	if [ "${ARCH}" = "64" ] && [ "${DISTRO}" != "Alpine" ] ; then
+		eghcup run --ghc 8.10.7 --cabal 3.4.1.0 --hls 1.6.1.0 --stack 2.7.3 --install --bindir "$(pwd)/.bin"
+		if [ "${OS}" = "Windows" ] ; then
+			cat "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup-run.files.windows" | sort > expected.txt
+		elif [ "${DISTRO}" = "Alpine" ] ; then
+			cat "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup-run.files.alpine" | sort > expected.txt
+		else
+			cat "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup-run.files" | sort > expected.txt
+		fi
+		(cd ".bin" && find . | sort) > actual.txt
+		diff --strip-trailing-cr -w -u actual.txt expected.txt
+		rm actual.txt expected.txt
+		rm -rf .bin
+	fi
+fi
+
+cabal --version
+
+eghcup debug-info
+
+# also test etags
+eghcup list
+eghcup list -t ghc
+eghcup list -t cabal
+
+ghc_ver=$(ghc --numeric-version)
+ghc --version
+ghc-${ghc_ver} --version
+if [ "${OS}" != "Windows" ] ; then
+		ghci --version
+		ghci-${ghc_ver} --version
+fi
+
+
+if [ "${OS}" = "macOS" ] && [ "${ARCH}" = "ARM64" ] ; then
+	# missing bindists
+	echo
+elif [ "${OS}" = "FreeBSD" ] ; then
+	# not enough space
+	echo
+else
+	# test installing new ghc doesn't mess with currently set GHC
+	# https://gitlab.haskell.org/haskell/ghcup-hs/issues/7
+	if [ "${OS}" = "Linux" ] ; then
+		eghcup --downloader=wget prefetch ghc 8.10.3
+		eghcup --offline install ghc 8.10.3
+		if [ "${ARCH}" = "64" ] ; then
+		    if [ "${DISTRO}" = "Alpine" ] ; then
+				(cat "$( cd "$(dirname "$0")" ; pwd -P )/../ghc-8.10.3-linux.alpine.files" | sort) > expected.txt
+			else
+				(cat "$( cd "$(dirname "$0")" ; pwd -P )/../ghc-8.10.3-linux.files" | sort) > expected.txt
+			fi
+			(cd "${GHCUP_DIR}/ghc/8.10.3/" && find . | sort) > actual.txt
+			# ignore docs
+		    sed -i '/share\/doc/d' actual.txt
+		    sed -i '/share\/doc/d' expected.txt
+			diff --strip-trailing-cr -w -u actual.txt expected.txt
+			rm actual.txt expected.txt
+		fi
+	elif [ "${OS}" = "Windows" ] ; then
+		eghcup prefetch ghc 8.10.3
+		eghcup --offline install ghc 8.10.3
+		(cat "$( cd "$(dirname "$0")" ; pwd -P )/../ghc-8.10.3-windows.files" | sort) > expected.txt
+		(cd "${GHCUP_DIR}/ghc/8.10.3/" && find . | sort) > actual.txt
+		diff --strip-trailing-cr -w -u actual.txt expected.txt
+		rm actual.txt expected.txt
+	else
+		eghcup prefetch ghc 8.10.3
+		eghcup --offline install ghc 8.10.3
+	fi
+	[ "$(ghc --numeric-version)" = "${ghc_ver}" ]
+	eghcup --offline set 8.10.3
+	eghcup set 8.10.3
+	[ "$(ghc --numeric-version)" = "8.10.3" ]
+	eghcup set ${GHC_VER}
+	[ "$(ghc --numeric-version)" = "${ghc_ver}" ]
+	eghcup unset ghc
+    "$GHCUP_BIN"/ghc --numeric-version && exit 1 || echo yes
+	eghcup set ${GHC_VER}
+	eghcup --offline rm 8.10.3
+	[ "$(ghc --numeric-version)" = "${ghc_ver}" ]
+
+
+	ls -lah "$GHCUP_BIN"
+
+	if [ "${OS}" = "macOS" ] ; then
+		eghcup install hls
+		$(eghcup whereis hls) --version
+
+		eghcup install stack
+		$(eghcup whereis stack) --version
+	elif [ "${OS}" = "Linux" ] ; then
+		if [ "${ARCH}" = "64" ] && [ "${DISTRO}" != "Alpine" ] ; then
+			eghcup install hls
+			haskell-language-server-wrapper --version
+			eghcup unset hls
+			"$GHCUP_BIN"/haskell-language-server-wrapper --version && exit 1 || echo yes
+
+			eghcup install stack
+			stack --version
+			eghcup unset stack
+			"$GHCUP_BIN"/stack --version && exit 1 || echo yes
+		fi
+	fi
+fi
+
+
+
+# check that lazy loading works for 'whereis'
+cp "$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml" "$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml.bak"
+echo '**' > "$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml"
+eghcup whereis ghc $(ghc --numeric-version)
+mv -f "$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml.bak" "$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml"
+
+eghcup rm $(ghc --numeric-version)
+
+# https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/116
+if [ "${OS}" = "Linux" ] ; then
+	if [ "${ARCH}" = "64" ] ; then
+		eghcup install cabal -u https://downloads.haskell.org/~ghcup/unofficial-bindists/cabal/3.7.0.0-pre20220407/cabal-install-3.7-x86_64-linux-alpine.tar.xz 3.4.0.0-rc4
+		eghcup rm cabal 3.4.0.0-rc4
+	fi
+fi
+
+eghcup gc -c
+
+# test etags
+rm -f "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml"
+raw_eghcup -s https://www.haskell.org/ghcup/data/ghcup-${JSON_VERSION}.yaml list
+# snapshot yaml and etags file
+etag=$(cat "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml.etags")
+sha=$(sha_sum "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml")
+# invalidate access time timer, which is 5minutes, so we re-download
+touch -a -m -t '199901010101' "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml"
+# redownload same file with some newlines added
+raw_eghcup -s https://www.haskell.org/ghcup/exp/ghcup-${JSON_VERSION}.yaml list
+# snapshot new yaml and etags file
+etag2=$(cat "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml.etags")
+sha2=$(sha_sum "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml")
+# compare
+[ "${etag}" != "${etag2}" ]
+[ "${sha}" != "${sha2}" ]
+# invalidate access time timer, which is 5minutes, but don't expect a re-download
+touch -a -m -t '199901010101' "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml"
+# this time, we expect the same hash and etag
+raw_eghcup -s https://www.haskell.org/ghcup/exp/ghcup-${JSON_VERSION}.yaml list
+etag3=$(cat "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml.etags")
+sha3=$(sha_sum "${GHCUP_DIR}/cache/ghcup-${JSON_VERSION}.yaml")
+[ "${etag2}" = "${etag3}" ]
+[ "${sha2}" = "${sha3}" ]
+
+# test isolated installs
+if [ "${DISTRO}" != "Alpine" ] ; then
+	eghcup install ghc -i "$(pwd)/isolated" 8.10.5
+	[ "$(isolated/bin/ghc --numeric-version)" = "8.10.5" ]
+	! eghcup install ghc -i "$(pwd)/isolated" 8.10.5
+	if [ "${ARCH}" = "64" ] ; then
+		if [ "${OS}" = "Linux" ] || [ "${OS}" = "Windows" ] ; then
+			eghcup install cabal -i "$(pwd)/isolated" 3.4.0.0
+			[ "$(isolated/cabal --numeric-version)" = "3.4.0.0" ]
+			eghcup install stack -i "$(pwd)/isolated" 2.7.3
+			[ "$(isolated/stack --numeric-version)" = "2.7.3" ]
+			eghcup install hls -i "$(pwd)/isolated" 1.3.0
+			[ "$(isolated/haskell-language-server-wrapper --numeric-version)" = "1.3.0" ] ||
+				[ "$(isolated/haskell-language-server-wrapper --numeric-version)" = "1.3.0.0" ]
+
+			# test that isolated installs don't clean up target directory
+			cat <<EOF > "${GHCUP_BIN}/gmake"
+#!/bin/bash
+exit 1
+EOF
+			chmod +x "${GHCUP_BIN}/gmake"
+			mkdir isolated_tainted/
+			touch isolated_tainted/lol
+
+			! eghcup install ghc -i "$(pwd)/isolated_tainted" 8.10.5 --force
+			[ -e "$(pwd)/isolated_tainted/lol" ]
+			rm "${GHCUP_BIN}/gmake"
+		fi
+	fi
+fi
+
+eghcup upgrade
+eghcup upgrade -f
+
+# restore old ghcup, because we want to test nuke
+cp "out/${ARTIFACT}"-* "$GHCUP_BIN/ghcup${ext}"
+chmod +x "$GHCUP_BIN/ghcup${ext}"
+
+# test that doing fishy symlinks into GHCup dir doesn't cause weird stuff on 'ghcup nuke'
+mkdir no_nuke/
+mkdir no_nuke/bar
+echo 'foo' > no_nuke/file
+echo 'bar' > no_nuke/bar/file
+ln -s "$CI_PROJECT_DIR"/no_nuke/ "${GHCUP_DIR}"/cache/no_nuke
+ln -s "$CI_PROJECT_DIR"/no_nuke/ "${GHCUP_DIR}"/logs/no_nuke
+
+# nuke
+eghcup nuke
+[ ! -e "${GHCUP_DIR}" ]
+
+# make sure nuke doesn't resolve symlinks
+[ -e "$CI_PROJECT_DIR"/no_nuke/file ]
+[ -e "$CI_PROJECT_DIR"/no_nuke/bar/file ]
+

.github/workflows/bootstrap.yaml

@@ -0,0 +1,48 @@
+name: Bootstrap tests
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  bootstrap:
+    name: bootstrap
+    runs-on: ${{ matrix.os }}
+    env:
+      BOOTSTRAP_HASKELL_CABAL_VERSION: 3.6.2.0
+      BOOTSTRAP_HASKELL_GHC_VERSION: 8.10.7
+      BOOTSTRAP_HASKELL_NONINTERACTIVE: yes
+      ARCH: 64
+      JSON_VERSION: "0.0.7"
+      APT_GET: "sudo apt-get"
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            DISTRO: Ubuntu
+          - os: macOS-10.15
+            DISTRO: na
+          - os: windows-latest
+            DISTRO: na
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - if: runner.os != 'Windows'
+        name: Run bootstrap
+        run: sh ./.github/scripts/bootstrap.sh
+        env:
+          DISTRO: ${{ matrix.DISTRO }}
+
+      - if: runner.os == 'Windows'
+        name: Run bootstrap
+        run: ./scripts/bootstrap/bootstrap-haskell.ps1 -InstallDir ${GITHUB_WORKSPACE} -BootstrapUrl ${GITHUB_WORKSPACE}/bootstrap-haskell -InBash
+        shell: pwsh

.github/workflows/cache.yaml

@@ -0,0 +1,37 @@
+name: Cache eviction
+
+on:
+  workflow_dispatch:
+    inputs:
+      key:
+        description: Which cache to evict
+        required: true
+        default: '/'
+        type: choice
+        options:
+        - FreeBSD-64-na
+        - Linux-32-Alpine
+        - Linux-64-Alpine
+        - Linux-64-Ubuntu
+        - Linux-ARM-Ubuntu
+        - Linux-ARM64-Ubuntu
+        - Windows-64-na
+        - macOS-64-na
+        - macOS-ARM64-na
+        - /
+jobs:
+  evict:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Remove from S3
+      uses: vitorsgomes/s3-rm-action@master
+      with:
+        args: --recursive
+      env:
+        AWS_S3_ENDPOINT: ${{ secrets.S3_HOST }}
+        AWS_S3_BUCKET: ghcup-hs
+        AWS_REGION: us-west-2
+        AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+        AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+        PATH_TO_DELETE: ${{ github.event.inputs.key }}

.github/workflows/docker.yaml

@@ -0,0 +1,68 @@
+name: Docker image builds
+
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: '0 0 * * *'
+
+jobs:
+  docker-alpine:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push (alpine 32bit)
+        uses: docker/build-push-action@v3
+        with:
+          context: ./docker/alpine32
+          push: true
+          tags: hasufell/i386-alpine-haskell:3.12
+          platforms: linux/i386
+      - name: Build and push (alpine 64bit)
+        uses: docker/build-push-action@v3
+        with:
+          context: ./docker/alpine64
+          push: true
+          tags: hasufell/alpine-haskell:3.12
+          platforms: linux/amd64
+
+  docker-arm:
+    runs-on: [self-hosted, Linux, aarch64]
+    steps:
+      - uses: docker://arm64v8/ubuntu:focal
+        name: Cleanup
+        with:
+          args: rm -rf .ghcup/ cabal/ dist-newstyle/ out/
+
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push (arm64v8)
+        uses: docker/build-push-action@v3
+        with:
+          context: ./docker/arm64v8/
+          push: true
+          tags: hasufell/arm64v8-ubuntu-haskell:focal
+          platforms: linux/arm64
+      - name: Build and push (arm32v7)
+        uses: docker/build-push-action@v3
+        with:
+          context: ./docker/arm32v7
+          push: true
+          tags: hasufell/arm32v7-ubuntu-haskell:focal
+          platforms: linux/arm

.github/workflows/hlint.yaml

@@ -0,0 +1,26 @@
+name: Hlint
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  hlint:
+    name: hlint
+    runs-on: ubuntu-latest
+    env:
+      JSON_VERSION: "0.0.7"
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - name: Run hlint
+        run: curl -sSL https://raw.github.com/ndmitchell/hlint/master/misc/run.sh | sh -s -- -r lib/ test/

.github/workflows/mkdocs.yaml

@@ -0,0 +1,33 @@
+name: MkDocs
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  mkdocs:
+    name: mkdocs
+    runs-on: ubuntu-latest
+    env:
+      JSON_VERSION: "0.0.7"
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - name: Install mkdocs deps
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y python3-pip
+          sudo pip3 install mkdocs
+
+      - name: Run mkdocs
+        run: |
+          mkdocs build

.github/workflows/release.yaml

@@ -1,109 +1,460 @@
-name: Create Release
+name: Build and release
 
 on:
   push:
+    branches:
+      - master
     tags:
       - 'v*'
+  pull_request:
+    branches:
+      - master
+  schedule:
+    - cron: '0 2 * * *'
 
 jobs:
-  draft_release:
+  build-linux:
-    name: Draft Release
+    name: Build linux binary
-    runs-on: ubuntu-latest
-    outputs:
-      upload_url: ${{ steps.create_release.outputs.upload_url }}
-
-    steps:
-      - name: Create Release
-        id: create_release
-        uses: actions/create-release@v1
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        with:
-          tag_name: ${{ github.ref }}
-          release_name: Release ${{ github.ref }}
-          body: |
-            Changes in this Release
-            - First Change
-            - Second Change
-          draft: true
-          prerelease: false
-
-  release-mac:
-    name: Create Release
-    needs: draft_release
     runs-on: ${{ matrix.os }}
     env:
-      MACOSX_DEPLOYMENT_TARGET: 10.13
+      CABAL_VER: 3.6.2.0
+      JSON_VERSION: "0.0.7"
+      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+      S3_HOST: ${{ secrets.S3_HOST }}
     strategy:
+      fail-fast: true
       matrix:
-        os:
+        include:
-          - macOS-10.15
+          - os: ubuntu-latest
+            ARTIFACT: "i386-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: 32
+          - os: ubuntu-latest
+            ARTIFACT: "x86_64-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: 64
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
-
-      - uses: haskell/actions/setup@v1.2
         with:
-          ghc-version: 8.10.7
+          submodules: 'true'
-          cabal-version: 3.6.2.0
 
-      - name: create ~/.local/bin
+      - if: matrix.ARCH == '32'
-        run: mkdir -p "$HOME/.local/bin"
+        name: Run build (32 bit linux)
-        shell: bash
+        uses: docker://hasufell/i386-alpine-haskell:3.12
-
+        with:
-      - name: Add ~/.local/bin to PATH
+          args: sh .github/scripts/build.sh
-        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
-        shell: bash
-
-      - name: Update cabal cache
-        run: cabal update
-        shell: bash
-
-      - name: Install cabal dependencies
-        run: cabal build --only-dependencies --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" -ftui
-        shell: bash
-
-      - name: Build
-        run: cabal build --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" -ftui
-        shell: bash
-
-      - name: Install
-        run: cp "$(cabal list-bin exe:ghcup)" ~/.local/bin/ghcup
-        shell: bash
-
-      - name: Strip
-        run: strip ~/.local/bin/ghcup
-        shell: bash
-
-      - name: Run tests
-        run: cabal test --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" all
-        shell: bash
-
-      - name: Install git
-        run: brew install git
-
-      - name: set HOME
-        run: echo "HOME=$HOME" >> $GITHUB_ENV
-        shell: bash
-
-      - name: Set ASSET_PATH
-        run: echo "ASSET_PATH=$HOME/.local/bin/ghcup" >> $GITHUB_ENV
-        shell: bash
-
-      - name: Upload Release Asset
-        id: upload-release-asset
-        uses: actions/upload-release-asset@v1
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: Alpine
+          AWS_SECRET_ACCESS_KEY: ${{ env.AWS_SECRET_ACCESS_KEY }}
+          AWS_ACCESS_KEY_ID: ${{ env.AWS_ACCESS_KEY_ID }}
+          S3_HOST: ${{ env.S3_HOST }}
+
+      - if: matrix.ARCH == '64'
+        name: Run build (64 bit linux)
+        uses: docker://hasufell/alpine-haskell:3.12
         with:
-          upload_url: ${{ needs.draft_release.outputs.upload_url }}
+          args: sh .github/scripts/build.sh
-          asset_path: ${{ env.ASSET_PATH }}
+        env:
-          asset_name: ghcup-${{ matrix.os }}
+          ARTIFACT: ${{ matrix.ARTIFACT }}
-          asset_content_type: application/octet-stream
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: Alpine
+          AWS_SECRET_ACCESS_KEY: ${{ env.AWS_SECRET_ACCESS_KEY }}
+          AWS_ACCESS_KEY_ID: ${{ env.AWS_ACCESS_KEY_ID }}
+          S3_HOST: ${{ env.S3_HOST }}
 
       - if: always()
-        uses: actions/upload-artifact@v2
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
         with:
-          name: plan.json
+          name: artifacts
-          path: ./dist-newstyle/cache/plan.json
+          path: |
+            ./out/*
 
+
+  build-arm:
+    name: Build ARM binary
+    runs-on: ${{ matrix.os }}
+    env:
+      CABAL_VER: 3.6.2.0
+      JSON_VERSION: "0.0.7"
+      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+      S3_HOST: ${{ secrets.S3_HOST }}
+    strategy:
+      fail-fast: true
+      matrix:
+        include:
+          - os: [self-hosted, Linux, aarch64]
+            ARTIFACT: "armv7-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: ARM
+          - os: [self-hosted, Linux, aarch64]
+            ARTIFACT: "aarch64-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: ARM64
+    steps:
+      - uses: docker://arm64v8/ubuntu:focal
+        name: Cleanup (aarch64 linux)
+        with:
+          args: "find . -mindepth 1 -maxdepth 1 -exec rm -rf -- {} +"
+
+      - name: git config
+        run: |
+          git config --global --get-all safe.directory | grep '^\*$' || git config --global --add safe.directory "*"
+        shell: bash
+
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - if: matrix.ARCH == 'ARM'
+        uses: docker://hasufell/arm32v7-ubuntu-haskell:focal
+        name: Run build (armv7 linux)
+        with:
+          args: sh .github/scripts/build.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: Ubuntu
+          AWS_SECRET_ACCESS_KEY: ${{ env.AWS_SECRET_ACCESS_KEY }}
+          AWS_ACCESS_KEY_ID: ${{ env.AWS_ACCESS_KEY_ID }}
+          S3_HOST: ${{ env.S3_HOST }}
+
+      - if: matrix.ARCH == 'ARM64'
+        uses: docker://hasufell/arm64v8-ubuntu-haskell:focal
+        name: Run build (aarch64 linux)
+        with:
+          args: sh .github/scripts/build.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: Ubuntu
+          AWS_SECRET_ACCESS_KEY: ${{ env.AWS_SECRET_ACCESS_KEY }}
+          AWS_ACCESS_KEY_ID: ${{ env.AWS_ACCESS_KEY_ID }}
+          S3_HOST: ${{ env.S3_HOST }}
+
+      - if: always()
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: artifacts
+          path: |
+            ./out/*
+
+  build-macwin:
+    name: Build binary (Mac/Win)
+    runs-on: ${{ matrix.os }}
+    env:
+      CABAL_VER: 3.6.2.0
+      MACOSX_DEPLOYMENT_TARGET: 10.13
+      JSON_VERSION: "0.0.7"
+      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+      S3_HOST: ${{ secrets.S3_HOST }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: [self-hosted, macOS, aarch64]
+            ARTIFACT: "aarch64-apple-darwin-ghcup"
+            GHC_VER: 9.2.5
+            ARCH: ARM64
+          - os: macOS-10.15
+            ARTIFACT: "x86_64-apple-darwin-ghcup"
+            GHC_VER: 9.2.5
+            ARCH: 64
+          - os: windows-latest
+            ARTIFACT: "x86_64-mingw64-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: 64
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - name: Run build (windows/mac)
+        run: bash .github/scripts/build.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: na
+          AWS_SECRET_ACCESS_KEY: ${{ env.AWS_SECRET_ACCESS_KEY }}
+          AWS_ACCESS_KEY_ID: ${{ env.AWS_ACCESS_KEY_ID }}
+          S3_HOST: ${{ env.S3_HOST }}
+          HOMEBREW_CHANGE_ARCH_TO_ARM: 1
+
+      - if: always()
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: artifacts
+          path: |
+            ./out/*
+
+
+  test-linux:
+    name: Test linux
+    needs: "build-linux"
+    runs-on: ${{ matrix.os }}
+    env:
+      CABAL_VER: 3.6.2.0
+      JSON_VERSION: "0.0.7"
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            ARTIFACT: "i386-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: 32
+            DISTRO: Alpine
+          - os: ubuntu-latest
+            ARTIFACT: "x86_64-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: 64
+            DISTRO: Alpine
+          - os: ubuntu-latest
+            ARTIFACT: "x86_64-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: 64
+            DISTRO: Ubuntu
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: artifacts
+          path: ./out
+
+      - if: matrix.ARCH == '32' && matrix.DISTRO == 'Alpine'
+        name: Run test (32 bit linux Alpine)
+        uses: docker://hasufell/i386-alpine-haskell:3.12
+        with:
+          args: sh .github/scripts/test.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: ${{ matrix.DISTRO }}
+
+      - if: matrix.ARCH == '64' && matrix.DISTRO == 'Alpine'
+        name: Run test (64 bit linux Alpine)
+        uses: docker://hasufell/alpine-haskell:3.12
+        with:
+          args: sh .github/scripts/test.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: ${{ matrix.DISTRO }}
+
+      - if: matrix.DISTRO != 'Alpine'
+        name: Run test (64 bit linux)
+        run: sh .github/scripts/test.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: ${{ matrix.DISTRO }}
+          APT_GET: "sudo apt-get"
+
+      - if: failure()
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: testfiles
+          path: |
+            ./test/golden/unix/GHCupInfo*json
+
+  test-arm:
+    name: Test ARM
+    needs: "build-arm"
+    runs-on: ${{ matrix.os }}
+    env:
+      CABAL_VER: 3.6.2.0
+      JSON_VERSION: "0.0.7"
+    strategy:
+      matrix:
+        include:
+          - os: [self-hosted, Linux, aarch64]
+            ARTIFACT: "armv7-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: ARM
+            DISTRO: Ubuntu
+          - os: [self-hosted, Linux, aarch64]
+            ARTIFACT: "aarch64-linux-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: ARM64
+            DISTRO: Ubuntu
+
+    steps:
+      - uses: docker://arm64v8/ubuntu:focal
+        name: Cleanup (aarch64 linux)
+        with:
+          args: "find . -mindepth 1 -maxdepth 1 -exec rm -rf -- {} +"
+
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: artifacts
+          path: ./out
+
+      - if: matrix.ARCH == 'ARM'
+        uses: docker://hasufell/arm32v7-ubuntu-haskell:focal
+        name: Run test (armv7 linux)
+        with:
+          args: sh .github/scripts/test.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: Ubuntu
+
+      - if: matrix.ARCH == 'ARM64'
+        uses: docker://hasufell/arm64v8-ubuntu-haskell:focal
+        name: Run test (aarch64 linux)
+        with:
+          args: sh .github/scripts/test.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: Ubuntu
+
+      - if: failure()
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: testfiles
+          path: |
+            ./test/golden/unix/GHCupInfo*json
+
+  test-macwin:
+    name: Test Mac/Win
+    needs: "build-macwin"
+    runs-on: ${{ matrix.os }}
+    env:
+      CABAL_VER: 3.6.2.0
+      MACOSX_DEPLOYMENT_TARGET: 10.13
+      JSON_VERSION: "0.0.7"
+    strategy:
+      matrix:
+        include:
+          - os: [self-hosted, macOS, aarch64]
+            ARTIFACT: "aarch64-apple-darwin-ghcup"
+            GHC_VER: 9.2.5
+            ARCH: ARM64
+            DISTRO: na
+          - os: macOS-10.15
+            ARTIFACT: "x86_64-apple-darwin-ghcup"
+            GHC_VER: 9.2.5
+            ARCH: 64
+            DISTRO: na
+          - os: windows-latest
+            ARTIFACT: "x86_64-mingw64-ghcup"
+            GHC_VER: 8.10.7
+            ARCH: 64
+            DISTRO: na
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: artifacts
+          path: ./out
+
+      - name: Run test (windows/mac)
+        run: bash .github/scripts/test.sh
+        env:
+          ARTIFACT: ${{ matrix.ARTIFACT }}
+          ARCH: ${{ matrix.ARCH }}
+          GHC_VER: ${{ matrix.GHC_VER }}
+          DISTRO: ${{ matrix.DISTRO }}
+          HOMEBREW_CHANGE_ARCH_TO_ARM: 1
+
+      - if: failure() && runner.os == 'Windows'
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: testfiles
+          path: |
+            ./test/golden/windows/GHCupInfo*json
+
+      - if: failure() && runner.os != 'Windows'
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: testfiles
+          path: |
+            ./test/golden/unix/GHCupInfo*json
+  hls:
+    name: hls
+    needs: build-linux
+    runs-on: ubuntu-latest
+    env:
+      GHC_VERSION: "8.10.7"
+      HLS_TARGET_VERSION: "1.8.0.0"
+      CABAL_VERSION: "3.6.2.0"
+      JSON_VERSION: "0.0.7"
+      ARTIFACT: "x86_64-linux-ghcup"
+      DISTRO: Ubuntu
+      ARCH: 64
+      AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+      AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
+      S3_HOST: ${{ secrets.S3_HOST }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: artifacts
+          path: ./out
+
+      - name: Run hls build
+        run: sh .github/scripts/hls.sh
+        env:
+          APT_GET: "sudo apt-get"
+
+  release:
+    name: release
+    needs: ["test-linux", "test-arm", "test-macwin", "hls"]
+    runs-on: ubuntu-latest
+    if: startsWith(github.ref, 'refs/tags/v')
+    steps:
+      - name: Download artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: artifacts
+          path: ./out
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          draft: true
+          files: |
+            ./out/*

.github/workflows/shellcheck.yaml

@@ -0,0 +1,28 @@
+name: Shellcheck
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  shellcheck:
+    name: shellcheck
+    runs-on: ubuntu-latest
+    env:
+      JSON_VERSION: "0.0.7"
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - name: Run shellcheck
+        uses: docker://koalaman/shellcheck-alpine
+        with:
+          args: shellcheck scripts/bootstrap/bootstrap-haskell

.gitlab/script/ghcup_version.sh

@@ -97,17 +97,23 @@ rm -rf "${GHCUP_DIR}"
 eghcup --numeric-version
 
 eghcup install ghc ${GHC_VERSION}
+eghcup unset ghc ${GHC_VERSION}
 ls -lah "$(eghcup whereis -d ghc ${GHC_VERSION})"
 [ "`$(eghcup whereis ghc ${GHC_VERSION}) --numeric-version`" = "${GHC_VERSION}" ]
 [ "`eghcup run --ghc ${GHC_VERSION} -- ghc --numeric-version`" = "${GHC_VERSION}" ]
+[ "`ghcup run --ghc ${GHC_VERSION} -- ghc -e 'Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)'`" = "`$(ghcup whereis ghc ${GHC_VERSION}) -e 'Control.Monad.join (Control.Monad.fmap System.IO.putStr System.Environment.getExecutablePath)'`" ]
 eghcup set ghc ${GHC_VERSION}
 eghcup install cabal ${CABAL_VERSION}
 [ "`$(eghcup whereis cabal ${CABAL_VERSION}) --numeric-version`" = "${CABAL_VERSION}" ]
 eghcup unset cabal
 "$GHCUP_BIN"/cabal --version && exit 1 || echo yes
-eghcup set cabal ${CABAL_VERSION}
+
-[ "`$(eghcup whereis cabal ${CABAL_VERSION}) --numeric-version`" = "${CABAL_VERSION}" ]
+# make sure no cabal is set when running 'ghcup run' to check that PATH propagages properly
+# https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/375
 [ "`eghcup run --cabal ${CABAL_VERSION} -- cabal --numeric-version`" = "${CABAL_VERSION}" ]
+eghcup set cabal ${CABAL_VERSION}
+
+[ "`$(eghcup whereis cabal ${CABAL_VERSION}) --numeric-version`" = "${CABAL_VERSION}" ]
 
 if [ "${OS}" != "FREEBSD" ] ; then
 	if [ "${ARCH}" = "64" ] ; then

CHANGELOG.md

@@ -1,5 +1,36 @@
 # Revision history for ghcup
 
+## 0.1.18.1 -- 2022-08-06
+
+* fix sdist and unbreak hackage, wrt [#399](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/399)
+
+## 0.1.18.0 -- 2022-07-30
+
+* Fix tui set wrt [#266](https://gitlab.haskell.org/haskell/ghcup-hs/-/merge_requests/266) by Arjun Kathuria
+    - Ask the user to install the tool via prompt when setting an non-installed version
+* improvements to safe (un-)installations
+    - bindists that don't support `make DESTDIR=/some/tmp/dir install` are now unsupported
+    - installed GHC files are now recorded to avoid use of `removePathForcibly`
+    - internally uses a newtype wrapper for user-input paths and restrict destructive operations to validated paths
+* Add `--disable-ld-override` for darwin bindists wrt #391
+* Allow passing bindist configure args wrt #377
+* use of `TMPDIR` is dropped... now uses an internal tmp dir `~/.ghcup/tmp`
+* improvements to error handling and warnings
+* Require --isolate to have an absolute directory, fixes #367
+* Fix mingw PATH handling wrt #371
+* Add --mingw-path switch to `ghcup run`
+* Fix `ghcup run` on windows, fixes #375
+* Improve `ghcup compile <hls|ghc>`
+    - short hashes now work
+    - print the long hash in addition to the detected version
+* Improve `ghcup compile hls`
+    - add `--git-describe-version` switch as an alternative to `--overwrite-version`
+    - Allow to build HLS from hackage (now is the default)
+	- Allow to run 'cabal update' automatically before the HLS build
+	- Fix parser and completer for 'ghcup compile hls --version'
+* Improve `ghcup compile ghc`
+    - Allow to build from arbitrary GHC source dists
+
 ## 0.1.17.10 -- 2022-05-12
 
 * windows hotfix (hackage-only release)

README.md

@@ -6,7 +6,7 @@
 [![Join the chat at https://gitter.im/haskell/ghcup](https://badges.gitter.im/haskell/ghcup.svg)](https://gitter.im/haskell/ghcup?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 <a href="https://opencollective.com/ghcup#category-CONTRIBUTE"><img src="https://opencollective.com/webpack/donate/button@2x.png?color=blue" alt="Donate" width="150"></a>
 
-GHCup is an installer for the general purpose language [Haskell](https://www.haskell.org/).
+GHCup is the main installer for the general purpose language [Haskell](https://www.haskell.org/).
 
 Visit the [documentation](https://www.haskell.org/ghcup/) for installation instructions.
 

app/ghcup/BrickMain.hs

@@ -13,10 +13,12 @@ import           GHCup.Errors
 import           GHCup.Types.Optics ( getDirs )
 import           GHCup.Types         hiding ( LeanAppState(..) )
 import           GHCup.Utils
+import           GHCup.OptParse.Common (logGHCPostRm)
 import           GHCup.Prelude ( decUTF8Safe )
 import           GHCup.Prelude.File
 import           GHCup.Prelude.Logger
 import           GHCup.Prelude.Process
+import           GHCup.Prompts
 
 import           Brick
 import           Brick.Widgets.Border
@@ -52,6 +54,8 @@ import           Text.PrettyPrint.HughesPJClass ( prettyShow )
 import           URI.ByteString
 
 import qualified Data.Text                     as T
+import qualified Data.Text.Lazy.Builder        as B
+import qualified Data.Text.Lazy                as L
 import qualified Graphics.Vty                  as Vty
 import qualified Data.Vector                   as V
 import System.Environment (getExecutablePath)
@@ -98,7 +102,7 @@ keyHandlers KeyBindings {..} =
   [ (bQuit, const "Quit"     , halt)
   , (bInstall, const "Install"  , withIOAction install')
   , (bUninstall, const "Uninstall", withIOAction del')
-  , (bSet, const "Set"      , withIOAction ((liftIO .) . set'))
+  , (bSet, const "Set"      , withIOAction set')
   , (bChangelog, const "ChangeLog", withIOAction changelog')
   , ( bShowAllVersions
     , \BrickSettings {..} ->
@@ -430,6 +434,7 @@ install' _ (_, ListResult {..}) = do
               , BuildFailed
               , TagNotFound
               , DigestError
+              , ContentLengthError
               , GPGError
               , DownloadFailed
               , DirNotEmpty
@@ -486,9 +491,12 @@ install' _ (_, ListResult {..}) = do
             <> "Also check the logs in ~/.ghcup/logs"
 
 
-set' :: BrickState -> (Int, ListResult) -> IO (Either String ())
+set' :: (MonadReader AppState m, MonadIO m, MonadThrow m, MonadFail m, MonadMask m, MonadUnliftIO m)
-set' _ (_, ListResult {..}) = do
+     => BrickState
-  settings <- readIORef settings'
+     -> (Int, ListResult)
+     -> m (Either String ())
+set' bs input@(_, ListResult {..}) = do
+  settings <- liftIO $ readIORef settings'
 
   let run =
         flip runReaderT settings
@@ -504,7 +512,28 @@ set' _ (_, ListResult {..}) = do
     )
     >>= \case
           VRight _ -> pure $ Right ()
-          VLeft  e -> pure $ Left (prettyShow e)
+          VLeft  e -> case e of
+            (V (NotInstalled tool _)) -> do
+              promptAnswer <- getUserPromptResponse userPrompt
+              case promptAnswer of
+                PromptYes -> do
+                  res <- install' bs input
+                  case res of
+                    (Left err) -> pure $ Left err
+                    (Right _) -> do
+                      logInfo "Setting now..."
+                      set' bs input
+
+                PromptNo -> pure $ Left (prettyShow e)
+              where
+                userPrompt = L.toStrict . B.toLazyText . B.fromString $
+                  "This Version of "
+                  <> show tool
+                  <> " you are trying to set is not installed.\n"
+                  <> "Would you like to install it first? [Y/N]: "
+
+            _ -> pure $ Left (prettyShow e)
+
 
 
 del' :: (MonadReader AppState m, MonadIO m, MonadFail m, MonadMask m, MonadUnliftIO m)
@@ -527,6 +556,7 @@ del' _ (_, ListResult {..}) = do
     )
     >>= \case
           VRight vi -> do
+            logGHCPostRm (mkTVer lVer)
             forM_ (_viPostRemove =<< vi) $ \msg ->
               logInfo msg
             pure $ Right ()
@@ -603,7 +633,7 @@ getGHCupInfo = do
 
   r <-
     flip runReaderT settings
-    . runE @'[DigestError, GPGError, JSONError , DownloadFailed , FileDoesNotExistError]
+    . runE @'[DigestError, ContentLengthError, GPGError, JSONError , DownloadFailed , FileDoesNotExistError]
     $ liftE getDownloadsF
 
   case r of

app/ghcup/GHCup/OptParse.hs

@@ -67,13 +67,14 @@ import           URI.ByteString
 import qualified Data.ByteString.UTF8          as UTF8
 
 
-
 data Options = Options
   {
   -- global options
     optVerbose     :: Maybe Bool
   , optCache       :: Maybe Bool
   , optMetaCache   :: Maybe Integer
+  , optMetaMode    :: Maybe MetaMode
+  , optPlatform    :: Maybe PlatformRequest
   , optUrlSource   :: Maybe URI
   , optNoVerify    :: Maybe Bool
   , optKeepDirs    :: Maybe KeepDirs
@@ -115,7 +116,18 @@ opts =
   Options
     <$> invertableSwitch "verbose" (Just 'v') False (help "Enable verbosity (default: disabled)")
     <*> invertableSwitch "cache" (Just 'c') False (help "Cache downloads in ~/.ghcup/cache (default: disabled)")
-    <*> optional (option auto (long "metadata-caching" <> help "How long the yaml metadata caching interval is (in seconds), 0 to disable" <> internal))
+    <*> optional (option auto (long "metadata-caching" <> metavar "SEC" <> help "How long the yaml metadata caching interval is (in seconds), 0 to disable"))
+    <*> optional (option auto (long "metadata-fetching-mode" <> metavar "<Strict|Lax>" <> help "Whether to fail on metadata download failure (Strict) or fall back to cached version (Lax (default))"))
+    <*> optional
+      (option
+        (eitherReader platformParser)
+        (  short 'p'
+        <> long "platform"
+        <> metavar "PLATFORM"
+        <> help
+             "Override for platform (triple matching ghc tarball names), e.g. x86_64-fedora27-linux"
+        )
+      )
     <*> optional
           (option
             (eitherReader parseUri)

app/ghcup/GHCup/OptParse/ChangeLog.hs

@@ -58,7 +58,7 @@ data ChangeLogOptions = ChangeLogOptions
     --[ Parsers ]--
     ---------------
 
-          
+
 changelogP :: Parser ChangeLogOptions
 changelogP =
   (\x y -> ChangeLogOptions x y)
@@ -71,15 +71,16 @@ changelogP =
                 "cabal" -> Right Cabal
                 "ghcup" -> Right GHCup
                 "stack" -> Right Stack
+                "hls"   -> Right HLS
                 e       -> Left e
               )
             )
-            (short 't' <> long "tool" <> metavar "<ghc|cabal|ghcup>" <> help
+            (short 't' <> long "tool" <> metavar "<ghc|cabal|hls|ghcup>" <> help
               "Open changelog for given tool (default: ghc)"
               <> completer toolCompleter
             )
           )
-    <*> optional (toolVersionArgument Nothing Nothing)
+    <*> optional (toolVersionTagArgument Nothing Nothing)
 
 
 
@@ -116,7 +117,8 @@ changelog ChangeLogOptions{..} runAppState runLogger = do
       ver' = maybe
         (Right Latest)
         (\case
-          ToolVersion tv -> Left (_tvVersion tv) -- FIXME: ugly sharing of ToolVersion
+          GHCVersion tv  -> Left (_tvVersion tv)
+          ToolVersion tv -> Left tv
           ToolTag     t  -> Right t
         )
         clToolVer

app/ghcup/GHCup/OptParse/Common.hs

@@ -25,6 +25,7 @@ import           Control.DeepSeq
 import           Control.Concurrent
 import           Control.Concurrent.Async
 import           Control.Exception.Safe
+import           Control.Monad.Identity (Identity(..))
 #if !MIN_VERSION_base(4,13,0)
 import           Control.Monad.Fail             ( MonadFail )
 #endif
@@ -64,26 +65,31 @@ import qualified Text.Megaparsec               as MP
 import qualified System.FilePath.Posix         as FP
 import GHCup.Version
 import Control.Exception (evaluate)
+import qualified Cabal.Config            as CC
 
 
     -------------
     --[ Types ]--
     -------------
 
-data ToolVersion = ToolVersion GHCTargetVersion -- target is ignored for cabal
+data ToolVersion = GHCVersion GHCTargetVersion
+                 | ToolVersion Version
                  | ToolTag Tag
 
 -- a superset of ToolVersion
-data SetToolVersion = SetToolVersion GHCTargetVersion
+data SetToolVersion = SetGHCVersion GHCTargetVersion
+                    | SetToolVersion Version
                     | SetToolTag Tag
                     | SetRecommended
                     | SetNext
 
 prettyToolVer :: ToolVersion -> String
-prettyToolVer (ToolVersion v') = T.unpack $ tVerToText v'
+prettyToolVer (GHCVersion v') = T.unpack $ tVerToText v'
+prettyToolVer (ToolVersion v') = T.unpack $ prettyVer v'
 prettyToolVer (ToolTag t) = show t
 
 toSetToolVer :: Maybe ToolVersion -> SetToolVersion
+toSetToolVer (Just (GHCVersion v')) = SetGHCVersion v'
 toSetToolVer (Just (ToolVersion v')) = SetToolVersion v'
 toSetToolVer (Just (ToolTag t')) = SetToolTag t'
 toSetToolVer Nothing = SetRecommended
@@ -96,10 +102,9 @@ toSetToolVer Nothing = SetRecommended
     --------------
 
 
--- | same as toolVersionParser, except as an argument.
+toolVersionTagArgument :: Maybe ListCriteria -> Maybe Tool -> Parser ToolVersion
-toolVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser ToolVersion
+toolVersionTagArgument criteria tool =
-toolVersionArgument criteria tool =
+  argument (eitherReader (parser tool))
-  argument (eitherReader toolVersionEither)
     (metavar (mv tool)
     <> completer (tagCompleter (fromMaybe GHC tool) [])
     <> foldMap (completer . versionCompleter criteria) tool)
@@ -108,20 +113,19 @@ toolVersionArgument criteria tool =
   mv (Just HLS) = "HLS_VERSION|TAG"
   mv _          = "VERSION|TAG"
 
+  parser (Just GHC) = ghcVersionTagEither
+  parser Nothing    = ghcVersionTagEither
+  parser _          = toolVersionTagEither
 
-versionParser :: Parser GHCTargetVersion
-versionParser = option
-  (eitherReader tVersionEither)
-  (short 'v' <> long "version" <> metavar "VERSION" <> help "The target version"
-  )
 
 versionParser' :: Maybe ListCriteria -> Maybe Tool -> Parser Version
 versionParser' criteria tool = argument
   (eitherReader (first show . version . T.pack))
   (metavar "VERSION"  <> foldMap (completer . versionCompleter criteria) tool)
 
-versionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser GHCTargetVersion
+ghcVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser GHCTargetVersion
-versionArgument criteria tool = argument (eitherReader tVersionEither) (metavar "VERSION" <> foldMap (completer . versionCompleter criteria) tool)
+ghcVersionArgument criteria tool = argument (eitherReader ghcVersionEither)
+                                            (metavar "VERSION" <> foldMap (completer . versionCompleter criteria) tool)
 
 
 -- https://github.com/pcapriotti/optparse-applicative/issues/148
@@ -230,9 +234,15 @@ isolateParser f = case isValid f && isAbsolute f of
               True -> Right $ normalise f
               False -> Left "Please enter a valid filepath for isolate dir."
 
-toolVersionEither :: String -> Either String ToolVersion
+-- this accepts cross prefix
-toolVersionEither s' =
+ghcVersionTagEither :: String -> Either String ToolVersion
-  second ToolTag (tagEither s') <|> second ToolVersion (tVersionEither s')
+ghcVersionTagEither s' =
+  second ToolTag (tagEither s') <|> second GHCVersion (ghcVersionEither s')
+
+-- this ignores cross prefix
+toolVersionTagEither :: String -> Either String ToolVersion
+toolVersionTagEither s' =
+  second ToolTag (tagEither s') <|> second ToolVersion (toolVersionEither s')
 
 tagEither :: String -> Either String Tag
 tagEither s' = case fmap toLower s' of
@@ -244,10 +254,14 @@ tagEither s' = case fmap toLower s' of
   other         -> Left $ "Unknown tag " <> other
 
 
-tVersionEither :: String -> Either String GHCTargetVersion
+ghcVersionEither :: String -> Either String GHCTargetVersion
-tVersionEither =
+ghcVersionEither =
   first (const "Not a valid version") . MP.parse ghcTargetVerP "" . T.pack
 
+toolVersionEither :: String -> Either String Version
+toolVersionEither =
+  first (const "Not a valid version") . MP.parse version' "" . T.pack
+
 
 toolParser :: String -> Either String Tool
 toolParser s' | t == T.pack "ghc"   = Right GHC
@@ -440,9 +454,11 @@ tagCompleter tool add = listIOCompleter $ do
       pure $ nub $ (add ++) $ fmap tagToString allTags
     VLeft _ -> pure  (nub $ ["recommended", "latest"] ++ add)
 
-
 versionCompleter :: Maybe ListCriteria -> Tool -> Completer
-versionCompleter criteria tool = listIOCompleter $ do
+versionCompleter criteria tool = versionCompleter' criteria tool (const True)
+
+versionCompleter' :: Maybe ListCriteria -> Tool -> (Version -> Bool) -> Completer
+versionCompleter' criteria tool filter' = listIOCompleter $ do
   dirs' <- liftIO getAllDirs
   let loggerConfig = LoggerConfig
         { lcPrintDebug   = False
@@ -471,7 +487,7 @@ versionCompleter criteria tool = listIOCompleter $ do
           runEnv = flip runReaderT appState
 
       installedVersions <- runEnv $ listVersions (Just tool) criteria
-      return $ T.unpack . prettyVer . lVer <$> installedVersions
+      return $ fmap (T.unpack . prettyVer) . filter filter' . fmap lVer $ installedVersions
 
 
 toolDlCompleter :: Tool -> Completer
@@ -663,7 +679,7 @@ fromVersion' SetRecommended tool = do
   GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
   bimap mkTVer Just <$> getRecommended dls tool
     ?? TagNotFound Recommended tool
-fromVersion' (SetToolVersion v) tool = do
+fromVersion' (SetGHCVersion v) tool = do
   GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
   let vi = getVersionInfo (_tvVersion v) tool dls
   case pvp $ prettyVer (_tvVersion v) of -- need to be strict here
@@ -675,6 +691,18 @@ fromVersion' (SetToolVersion v) tool = do
           when (v' /= _tvVersion v) $ lift $ logWarn ("Assuming you meant version " <> prettyVer v')
           pure (GHCTargetVersion (_tvTarget v) v', Just vi')
         Nothing -> pure (v, vi)
+fromVersion' (SetToolVersion v) tool = do
+  GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
+  let vi = getVersionInfo v tool dls
+  case pvp $ prettyVer v of -- need to be strict here
+    Left _ -> pure (mkTVer v, vi)
+    Right pvpIn ->
+      lift (getLatestToolFor tool pvpIn dls) >>= \case
+        Just (pvp_, vi') -> do
+          v' <- lift $ pvpToVersion pvp_ ""
+          when (v' /= v) $ lift $ logWarn ("Assuming you meant version " <> prettyVer v')
+          pure (GHCTargetVersion mempty v', Just vi')
+        Nothing -> pure (mkTVer v, vi)
 fromVersion' (SetToolTag Latest) tool = do
   GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
   bimap mkTVer Just <$> getLatest dls tool ?? TagNotFound Latest tool
@@ -763,3 +791,12 @@ checkForUpdates = do
   pure $ catMaybes (ghcup:otherTools)
  where
   forMM a f = fmap join $ forM a f
+
+
+logGHCPostRm :: (MonadReader env m, HasLog env, MonadIO m) => GHCTargetVersion -> m ()
+logGHCPostRm ghcVer = do
+  cabalStore <- liftIO $ handleIO (\_ -> if isWindows then pure "C:\\cabal\\store" else pure "~/.cabal/store")
+    (runIdentity . CC.cfgStoreDir <$> CC.readConfig)
+  let storeGhcDir = cabalStore </> ("ghc-" <> T.unpack (prettyVer $ _tvVersion ghcVer))
+  logInfo $ T.pack $ "After removing GHC you might also want to clean up your cabal store at: " <> storeGhcDir
+

app/ghcup/GHCup/OptParse/Compile.hs

@@ -12,6 +12,8 @@ module GHCup.OptParse.Compile where
 
 
 import           GHCup
+import qualified GHCup.GHC as GHC
+import qualified GHCup.HLS as HLS
 import           GHCup.Errors
 import           GHCup.Types
 import           GHCup.Types.Optics
@@ -30,7 +32,8 @@ import           Control.Monad.Trans.Resource
 import           Data.Bifunctor
 import           Data.Functor
 import           Data.Maybe
-import           Data.Versions                  ( Version, prettyVer, version )
+import           Data.Versions                  ( Version, prettyVer, version, pvp )
+import qualified Data.Versions as V
 import           Data.Text                      ( Text )
 import           Haskus.Utils.Variant.Excepts
 import           Options.Applicative     hiding ( style )
@@ -41,7 +44,7 @@ import           Text.PrettyPrint.HughesPJClass ( prettyShow )
 
 import           URI.ByteString          hiding ( uriParser )
 import qualified Data.Text                     as T
-import Control.Exception.Safe (MonadMask)
+import Control.Exception.Safe (MonadMask, displayException)
 import System.FilePath (isPathSeparator)
 import Text.Read (readEither)
 
@@ -64,7 +67,7 @@ data CompileCommand = CompileGHC GHCCompileOptions
 
 
 data GHCCompileOptions = GHCCompileOptions
-  { targetGhc    :: Either Version GitBranch
+  { targetGhc    :: GHC.GHCVer Version
   , bootstrapGhc :: Either Version FilePath
   , jobs         :: Maybe Int
   , buildConfig  :: Maybe FilePath
@@ -78,11 +81,13 @@ data GHCCompileOptions = GHCCompileOptions
   , isolateDir   :: Maybe FilePath
   }
 
+
 data HLSCompileOptions = HLSCompileOptions
-  { targetHLS    :: Either Version GitBranch
+  { targetHLS    :: HLS.HLSVer
   , jobs         :: Maybe Int
   , setCompile   :: Bool
-  , ovewrwiteVer :: Maybe Version
+  , updateCabal  :: Bool
+  , ovewrwiteVer :: Either Bool Version
   , isolateDir   :: Maybe FilePath
   , cabalProject :: Maybe (Either FilePath URI)
   , cabalProjectLocal :: Maybe URI
@@ -145,20 +150,22 @@ Examples:
 
   compileHLSFooter = [s|Discussion:
   Compiles and installs the specified HLS version.
-  The last argument is a list of GHC versions to compile for.
+  The --ghc arguments are necessary to specify which GHC version to build for/against.
   These need to be available in PATH prior to compilation.
 
 Examples:
-  # compile 1.4.0 for ghc 8.10.5 and 8.10.7
+  # compile 1.7.0.0 from hackage for 8.10.7, running 'cabal update' before the build
-  ghcup compile hls -v 1.4.0 -j 12 --ghc 8.10.5 --ghc 8.10.7
+  ghcup compile hls --version 1.7.0.0 --ghc 8.10.7 --cabal-update
-  # compile from master for ghc 8.10.7, linking everything dynamically
+  # compile from master for ghc 9.2.3 using 'git describe' to name the binary and ignore the pinned index state
-  ghcup compile hls -g master -j 12 --ghc 8.10.7 -- --ghc-options='-dynamic'|]
+  ghcup compile hls -g master --git-describe-version --ghc 9.2.3 -- --index-state=@(date '+%s')
+  # compile a specific commit for ghc 9.2.3 and set a specifc version for the binary name
+  ghcup compile hls -g a32db0b -o 1.7.0.0-p1 --ghc 9.2.3|]
 
 
 ghcCompileOpts :: Parser GHCCompileOptions
 ghcCompileOpts =
   GHCCompileOptions
-    <$> ((Left <$> option
+    <$> ((GHC.SourceDist <$> option
           (eitherReader
             (first (const "Not a valid version") . version . T.pack)
           )
@@ -167,7 +174,7 @@ ghcCompileOpts =
             <> (completer $ versionCompleter Nothing GHC)
           )
           ) <|>
-          (Right <$> (GitBranch <$> option
+          (GHC.GitDist <$> (GitBranch <$> option
           str
           (short 'g' <> long "git-ref" <> metavar "GIT_REFERENCE" <> help
             "The git commit/branch/ref to build from"
@@ -176,7 +183,18 @@ ghcCompileOpts =
             short 'r' <> long "repository" <> metavar "GIT_REPOSITORY" <> help "The git repository to build from (defaults to GHC upstream)"
             <> completer (gitFileUri ["https://gitlab.haskell.org/ghc/ghc.git"])
             ))
-          )))
+          ))
+          <|>
+          (
+           GHC.RemoteDist <$> (option
+            (eitherReader uriParser)
+            (long "remote-source-dist" <> metavar "URI" <> help
+              "URI (https/http/file) to a GHC source distribution"
+              <> completer fileUri
+            )
+          )
+          )
+          )
     <*> option
           (eitherReader
             (\x ->
@@ -268,24 +286,46 @@ ghcCompileOpts =
 hlsCompileOpts :: Parser HLSCompileOptions
 hlsCompileOpts =
   HLSCompileOptions
-    <$> ((Left <$> option
+    <$> ((HLS.HackageDist <$> option
           (eitherReader
-            (first (const "Not a valid version") . version . T.pack)
+            ((>>= first displayException . V.version . V.prettyPVP) . first (const "Not a valid PVP version") . pvp . T.pack)
           )
           (short 'v' <> long "version" <> metavar "VERSION" <> help
-            "The tool version to compile"
+            "The version to compile (pulled from hackage)"
-            <> (completer $ versionCompleter Nothing HLS)
+            <> (completer $ versionCompleter' Nothing HLS (either (const False) (const True) . V.pvp . V.prettyVer))
           )
-          ) <|>
+          )
-          (Right <$> (GitBranch <$> option
+          <|>
+          (HLS.GitDist <$> (GitBranch <$> option
           str
           (short 'g' <> long "git-ref" <> metavar "GIT_REFERENCE" <> help
-            "The git commit/branch/ref to build from"
+            "The git commit/branch/ref to build from (accepts anything 'git checkout' accepts)"
           ) <*>
           optional (option str (short 'r' <> long "repository" <> metavar "GIT_REPOSITORY" <> help "The git repository to build from (defaults to HLS upstream)"
             <> completer (gitFileUri ["https://github.com/haskell/haskell-language-server.git"])
           ))
-          )))
+          ))
+          <|>
+          (HLS.SourceDist <$> (option
+            (eitherReader
+              (first (const "Not a valid version") . version . T.pack)
+            )
+          (long "source-dist" <> metavar "VERSION" <> help
+            "The version to compile (pulled from packaged git sources)"
+            <> (completer $ versionCompleter Nothing HLS)
+          )
+          ))
+          <|>
+          (
+           HLS.RemoteDist <$> (option
+            (eitherReader uriParser)
+            (long "remote-source-dist" <> metavar "URI" <> help
+              "URI (https/http/file) to a HLS source distribution"
+              <> completer fileUri
+            )
+          )
+          )
+          )
     <*> optional
           (option
             (eitherReader (readEither @Int))
@@ -295,8 +335,10 @@ hlsCompileOpts =
             )
           )
     <*> fmap (fromMaybe True) (invertableSwitch "set" Nothing True (help "Don't set as active version after install"))
-    <*> optional
+    <*> switch (long "cabal-update" <> help "Run 'cabal update' before the build")
-          (option
+    <*>
+         (
+          (Right <$> option
             (eitherReader
               (first (const "Not a valid version") . version . T.pack)
             )
@@ -305,6 +347,14 @@ hlsCompileOpts =
             <> (completer $ versionCompleter Nothing HLS)
             )
           )
+          <|>
+          (Left <$> (switch
+                      (long "git-describe-version"
+                         <> help "Use the output of 'git describe' (if building from git) as the VERSION component of the installed binary."
+                      )
+                    )
+          )
+          )
     <*> optional
           (option
             (eitherReader isolateParser)
@@ -351,7 +401,7 @@ hlsCompileOpts =
           )
         )
     <*> some (
-          option (eitherReader toolVersionEither)
+          option (eitherReader ghcVersionTagEither)
             (  long "ghc" <> metavar "GHC_VERSION|TAG" <> help "For which GHC version to compile for (can be specified multiple times)"
             <> completer (tagCompleter GHC [])
             <> completer (versionCompleter Nothing GHC))
@@ -370,6 +420,7 @@ hlsCompileOpts =
 type GHCEffects = '[ AlreadyInstalled
                   , BuildFailed
                   , DigestError
+                  , ContentLengthError
                   , GPGError
                   , DownloadFailed
                   , GHCupSetError
@@ -393,6 +444,7 @@ type GHCEffects = '[ AlreadyInstalled
 type HLSEffects = '[ AlreadyInstalled
                   , BuildFailed
                   , DigestError
+                  , ContentLengthError
                   , GPGError
                   , DownloadFailed
                   , GHCupSetError
@@ -457,7 +509,7 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
     (CompileHLS HLSCompileOptions { .. }) -> do
       runCompileHLS runAppState (do
         case targetHLS of
-          Left targetVer -> do
+          HLS.SourceDist targetVer -> do
             GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
             let vi = getVersionInfo targetVer HLS dls
             forM_ (_viPreCompile =<< vi) $ \msg -> do
@@ -465,7 +517,7 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
               lift $ logInfo
                 "...waiting for 5 seconds, you can still abort..."
               liftIO $ threadDelay 5000000 -- for compilation, give the user a sec to intervene
-          Right _ -> pure ()
+          _ -> pure ()
         ghcs <- liftE $ forM targetGHCs (\ghc -> fmap (_tvVersion . fst) . fromVersion (Just ghc) $ GHC)
         targetVer <- liftE $ compileHLS
                     targetHLS
@@ -475,6 +527,7 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
                     (maybe GHCupInternal IsolateDir isolateDir)
                     cabalProject
                     cabalProjectLocal
+                    updateCabal
                     patches
                     cabalArgs
         GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
@@ -508,7 +561,7 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
     (CompileGHC GHCCompileOptions {..}) ->
       runCompileGHC runAppState (do
         case targetGhc of
-          Left targetVer -> do
+          GHC.SourceDist targetVer -> do
             GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
             let vi = getVersionInfo targetVer GHC dls
             forM_ (_viPreCompile =<< vi) $ \msg -> do
@@ -516,9 +569,12 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
               lift $ logInfo
                 "...waiting for 5 seconds, you can still abort..."
               liftIO $ threadDelay 5000000 -- for compilation, give the user a sec to intervene
-          Right _ -> pure ()
+          _ -> pure ()
         targetVer <- liftE $ compileGHC
-                    (first (GHCTargetVersion crossTarget) targetGhc)
+                    ((\case
+                        GHC.SourceDist v -> GHC.SourceDist $ GHCTargetVersion crossTarget v
+                        GHC.GitDist g -> GHC.GitDist g
+                        GHC.RemoteDist r -> GHC.RemoteDist r) targetGhc)
                     ovewrwiteVer
                     bootstrapGhc
                     jobs

app/ghcup/GHCup/OptParse/Config.hs

@@ -59,7 +59,7 @@ data ConfigCommand
     --[ Parsers ]--
     ---------------
 
-          
+
 configP :: Parser ConfigCommand
 configP = subparser
       (  command "init" initP
@@ -124,6 +124,7 @@ updateSettings :: UserSettings -> Settings -> Settings
 updateSettings UserSettings{..} Settings{..} =
    let cache'      = fromMaybe cache uCache
        metaCache'  = fromMaybe metaCache uMetaCache
+       metaMode'   = fromMaybe metaMode uMetaMode
        noVerify'   = fromMaybe noVerify uNoVerify
        keepDirs'   = fromMaybe keepDirs uKeepDirs
        downloader' = fromMaybe downloader uDownloader
@@ -131,7 +132,8 @@ updateSettings UserSettings{..} Settings{..} =
        urlSource'  = fromMaybe urlSource uUrlSource
        noNetwork'  = fromMaybe noNetwork uNoNetwork
        gpgSetting' = fromMaybe gpgSetting uGPGSetting
-   in Settings cache' metaCache' noVerify' keepDirs' downloader' verbose' urlSource' noNetwork' gpgSetting' noColor
+       platformOverride' = uPlatformOverride <|> platformOverride
+   in Settings cache' metaCache' metaMode' noVerify' keepDirs' downloader' verbose' urlSource' noNetwork' gpgSetting' noColor platformOverride'
 
 
 
@@ -187,9 +189,15 @@ config configCommand settings keybindings runLogger = case configCommand of
       AddSource xs -> do
         doConfig (defaultUserSettings { uUrlSource = Just $ AddSource (xs <> [Right uri]) })
         pure ExitSuccess
-      _ -> do
+      GHCupURL -> do
         doConfig (defaultUserSettings { uUrlSource = Just $ AddSource [Right uri] })
         pure ExitSuccess
+      OwnSource xs -> do
+        doConfig (defaultUserSettings { uUrlSource = Just $ OwnSource (xs <> [Right uri]) })
+        pure ExitSuccess
+      OwnSpec spec -> do
+        doConfig (defaultUserSettings { uUrlSource = Just $ OwnSource ([Left spec, Right uri]) })
+        pure ExitSuccess
 
  where
   doConfig :: MonadIO m => UserSettings -> m ()

app/ghcup/GHCup/OptParse/Install.hs

@@ -66,7 +66,6 @@ data InstallCommand = InstallGHC InstallOptions
 
 data InstallOptions = InstallOptions
   { instVer      :: Maybe ToolVersion
-  , instPlatform :: Maybe PlatformRequest
   , instBindist  :: Maybe URI
   , instSet      :: Bool
   , isolateDir   :: Maybe FilePath
@@ -171,23 +170,13 @@ Examples:
   ghcup install ghc 8.10.2
 
   # install GHC head fedora bindist
-  ghcup install ghc -u https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27 head|]
+  ghcup install ghc -u 'https://gitlab.haskell.org/ghc/ghc/-/jobs/artifacts/master/raw/ghc-x86_64-linux-fedora33-release.tar.xz?job=x86_64-linux-fedora33-release' head|]
 
 
 installOpts :: Maybe Tool -> Parser InstallOptions
 installOpts tool =
-  (\p (u, v) b is f -> InstallOptions v p u b is f)
+  (\(u, v) b is f -> InstallOptions v u b is f)
-    <$> optional
+    <$> (   (   (,)
-          (option
-            (eitherReader platformParser)
-            (  short 'p'
-            <> long "platform"
-            <> metavar "PLATFORM"
-            <> help
-                 "Override for platform (triple matching ghc tarball names), e.g. x86_64-fedora27-linux"
-            )
-          )
-    <*> (   (   (,)
             <$> optional
                   (option
                     (eitherReader uriParser)
@@ -196,7 +185,7 @@ installOpts tool =
                       <> completer (toolDlCompleter (fromMaybe GHC tool))
                     )
                   )
-            <*> (Just <$> toolVersionArgument Nothing tool)
+            <*> (Just <$> toolVersionTagArgument Nothing tool)
             )
         <|> pure (Nothing, Nothing)
         )
@@ -254,6 +243,7 @@ type InstallEffects = '[ AlreadyInstalled
                        , BuildFailed
                        , TagNotFound
                        , DigestError
+                       , ContentLengthError
                        , GPGError
                        , DownloadFailed
                        , TarDirDoesNotExist
@@ -268,11 +258,10 @@ type InstallEffects = '[ AlreadyInstalled
 
 
 runInstTool :: AppState
-            -> Maybe PlatformRequest
             -> Excepts InstallEffects (ResourceT (ReaderT AppState IO)) a
             -> IO (VEither InstallEffects a)
-runInstTool appstate' mInstPlatform =
+runInstTool appstate' =
-  flip runReaderT (maybe appstate' (\x -> appstate'{ pfreq = x } :: AppState) mInstPlatform)
+  flip runReaderT appstate'
   . runResourceT
   . runE
     @InstallEffects
@@ -283,6 +272,7 @@ type InstallGHCEffects = '[ AlreadyInstalled
                           , BuildFailed
                           , CopyError
                           , DigestError
+                          , ContentLengthError
                           , DirNotEmpty
                           , DownloadFailed
                           , FileAlreadyExistsError
@@ -302,11 +292,10 @@ type InstallGHCEffects = '[ AlreadyInstalled
                           ]
 
 runInstGHC :: AppState
-           -> Maybe PlatformRequest
            -> Excepts InstallGHCEffects (ResourceT (ReaderT AppState IO)) a
            -> IO (VEither InstallGHCEffects a)
-runInstGHC appstate' mInstPlatform =
+runInstGHC appstate' =
-  flip runReaderT (maybe appstate' (\x -> appstate'{ pfreq = x } :: AppState) mInstPlatform)
+  flip runReaderT appstate'
   . runResourceT
   . runE
     @InstallGHCEffects
@@ -331,7 +320,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
   installGHC InstallOptions{..} = do
     s'@AppState{ dirs = Dirs{ .. } } <- liftIO getAppState'
     (case instBindist of
-       Nothing -> runInstGHC s' instPlatform $ do
+       Nothing -> runInstGHC s' $ do
          (v, vi) <- liftE $ fromVersion instVer GHC
          liftE $ runBothE' (installGHCBin
                      (_tvVersion v)
@@ -342,10 +331,10 @@ install installCommand settings getAppState' runLogger = case installCommand of
                    $ when instSet $ when (isNothing isolateDir) $ liftE $ void $ setGHC v SetGHCOnly Nothing
          pure vi
        Just uri -> do
-         runInstGHC s'{ settings = settings {noVerify = True}} instPlatform $ do
+         runInstGHC s'{ settings = settings {noVerify = True}} $ do
            (v, vi) <- liftE $ fromVersion instVer GHC
            liftE $ runBothE' (installGHCBindist
-                       (DownloadInfo uri (Just $ RegexDir "ghc-.*") "")
+                       (DownloadInfo uri (Just $ RegexDir "ghc-.*") "" Nothing)
                        (_tvVersion v)
                        (maybe GHCupInternal IsolateDir isolateDir)
                        forceInstall
@@ -403,7 +392,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
   installCabal InstallOptions{..} = do
     s'@AppState{ dirs = Dirs{ .. } } <- liftIO getAppState'
     (case instBindist of
-       Nothing -> runInstTool s' instPlatform $ do
+       Nothing -> runInstTool s' $ do
          (_tvVersion -> v, vi) <- liftE $ fromVersion instVer Cabal
          liftE $ runBothE' (installCabalBin
                                     v
@@ -412,10 +401,10 @@ install installCommand settings getAppState' runLogger = case installCommand of
                                   ) $ when instSet $ when (isNothing isolateDir) $ liftE $ setCabal v
          pure vi
        Just uri -> do
-         runInstTool s'{ settings = settings { noVerify = True}} instPlatform $ do
+         runInstTool s'{ settings = settings { noVerify = True}} $ do
            (_tvVersion -> v, vi) <- liftE $ fromVersion instVer Cabal
            liftE $ runBothE' (installCabalBindist
-                                      (DownloadInfo uri Nothing "")
+                                      (DownloadInfo uri Nothing "" Nothing)
                                       v
                                       (maybe GHCupInternal IsolateDir isolateDir)
                                       forceInstall
@@ -452,7 +441,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
   installHLS InstallOptions{..} = do
      s'@AppState{ dirs = Dirs{ .. } } <- liftIO getAppState'
      (case instBindist of
-       Nothing -> runInstTool s' instPlatform $ do
+       Nothing -> runInstTool s' $ do
          (_tvVersion -> v, vi) <- liftE $ fromVersion instVer HLS
          liftE $ runBothE' (installHLSBin
                                     v
@@ -461,11 +450,11 @@ install installCommand settings getAppState' runLogger = case installCommand of
                                   ) $ when instSet $ when (isNothing isolateDir) $ liftE $ setHLS v SetHLSOnly Nothing
          pure vi
        Just uri -> do
-         runInstTool s'{ settings = settings { noVerify = True}} instPlatform $ do
+         runInstTool s'{ settings = settings { noVerify = True}} $ do
            (_tvVersion -> v, vi) <- liftE $ fromVersion instVer HLS
            -- TODO: support legacy
            liftE $ runBothE' (installHLSBindist
-                                      (DownloadInfo uri (Just $ RegexDir "haskell-language-server-*") "")
+                                      (DownloadInfo uri (if isWindows then Nothing else Just (RegexDir "haskell-language-server-*")) "" Nothing)
                                       v
                                       (maybe GHCupInternal IsolateDir isolateDir)
                                       forceInstall
@@ -502,7 +491,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
   installStack InstallOptions{..} = do
      s'@AppState{ dirs = Dirs{ .. } } <- liftIO getAppState'
      (case instBindist of
-        Nothing -> runInstTool s' instPlatform $ do
+        Nothing -> runInstTool s' $ do
           (_tvVersion -> v, vi) <- liftE $ fromVersion instVer Stack
           liftE $ runBothE' (installStackBin
                                      v
@@ -511,10 +500,10 @@ install installCommand settings getAppState' runLogger = case installCommand of
                                    ) $ when instSet $ when (isNothing isolateDir) $ liftE $ setStack v
           pure vi
         Just uri -> do
-          runInstTool s'{ settings = settings { noVerify = True}} instPlatform $ do
+          runInstTool s'{ settings = settings { noVerify = True}} $ do
             (_tvVersion -> v, vi) <- liftE $ fromVersion instVer Stack
             liftE $ runBothE' (installStackBindist
-                                       (DownloadInfo uri Nothing "")
+                                       (DownloadInfo uri Nothing "" Nothing)
                                        v
                                        (maybe GHCupInternal IsolateDir isolateDir)
                                        forceInstall
@@ -546,4 +535,3 @@ install installCommand settings getAppState' runLogger = case installCommand of
                 logError $ T.pack $ prettyShow e
                 logError $ "Also check the logs in " <> T.pack (fromGHCupPath logsDir)
               pure $ ExitFailure 4
-

app/ghcup/GHCup/OptParse/Prefetch.hs

@@ -74,44 +74,44 @@ data PrefetchGHCOptions = PrefetchGHCOptions {
     --[ Parsers ]--
     ---------------
 
-          
+
 prefetchP :: Parser PrefetchCommand
 prefetchP = subparser
   (  command
       "ghc"
-      (info 
+      (info
         (PrefetchGHC
           <$> (PrefetchGHCOptions
                 <$> ( switch (short 's' <> long "source" <> help "Download source tarball instead of bindist") <**> helper )
                 <*> optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*>  optional (toolVersionArgument Nothing (Just GHC)) )
+          <*>  optional (toolVersionTagArgument Nothing (Just GHC)) )
         ( progDesc "Download GHC assets for installation")
       )
       <>
      command
       "cabal"
-      (info 
+      (info
         (PrefetchCabal
           <$> fmap PrefetchOptions (optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*> ( optional (toolVersionArgument Nothing (Just Cabal)) <**> helper ))
+          <*> ( optional (toolVersionTagArgument Nothing (Just Cabal)) <**> helper ))
         ( progDesc "Download cabal assets for installation")
       )
       <>
      command
       "hls"
-      (info 
+      (info
         (PrefetchHLS
           <$> fmap PrefetchOptions (optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*> ( optional (toolVersionArgument Nothing (Just HLS)) <**> helper ))
+          <*> ( optional (toolVersionTagArgument Nothing (Just HLS)) <**> helper ))
         ( progDesc "Download HLS assets for installation")
       )
       <>
      command
       "stack"
-      (info 
+      (info
         (PrefetchStack
           <$> fmap PrefetchOptions (optional (option str (short 'd' <> long "directory" <> help "directory to download into (default: ~/.ghcup/cache/)" <> completer (bashCompleter "directory"))))
-          <*> ( optional (toolVersionArgument Nothing (Just Stack)) <**> helper ))
+          <*> ( optional (toolVersionTagArgument Nothing (Just Stack)) <**> helper ))
         ( progDesc "Download stack assets for installation")
       )
       <>
@@ -153,6 +153,7 @@ type PrefetchEffects = '[ TagNotFound
                         , NoToolVersionSet
                         , NoDownload
                         , DigestError
+                        , ContentLengthError
                         , GPGError
                         , DownloadFailed
                         , JSONError

app/ghcup/GHCup/OptParse/Rm.hs

@@ -71,7 +71,7 @@ data RmOptions = RmOptions
     --[ Parsers ]--
     ---------------
 
-          
+
 rmParser :: Parser (Either RmCommand RmOptions)
 rmParser =
   (Left <$> subparser
@@ -103,7 +103,7 @@ rmParser =
 
 
 rmOpts :: Maybe Tool -> Parser RmOptions
-rmOpts tool = RmOptions <$> versionArgument (Just ListInstalled) tool
+rmOpts tool = RmOptions <$> ghcVersionArgument (Just ListInstalled) tool
 
 
 
@@ -175,8 +175,8 @@ rm rmCommand runAppState runLogger = case rmCommand of
       )
       >>= \case
             VRight vi -> do
-              forM_ (_viPostRemove =<< vi) $ \msg ->
+              runLogger $ logGHCPostRm ghcVer
-                runLogger $ logInfo msg
+              postRmLog vi
               pure ExitSuccess
             VLeft  e -> do
               runLogger $ logError $ T.pack $ prettyShow e
@@ -191,8 +191,7 @@ rm rmCommand runAppState runLogger = case rmCommand of
       )
       >>= \case
             VRight vi -> do
-              forM_ (_viPostRemove =<< vi) $ \msg ->
+              postRmLog vi
-                runLogger $ logInfo msg
               pure ExitSuccess
             VLeft  e -> do
               runLogger $ logError $ T.pack $ prettyShow e
@@ -207,8 +206,7 @@ rm rmCommand runAppState runLogger = case rmCommand of
       )
       >>= \case
             VRight vi -> do
-              forM_ (_viPostRemove =<< vi) $ \msg ->
+              postRmLog vi
-                runLogger $ logInfo msg
               pure ExitSuccess
             VLeft  e -> do
               runLogger $ logError $ T.pack $ prettyShow e
@@ -223,10 +221,12 @@ rm rmCommand runAppState runLogger = case rmCommand of
       )
       >>= \case
             VRight vi -> do
-              forM_ (_viPostRemove =<< vi) $ \msg ->
+              postRmLog vi
-                runLogger $ logInfo msg
               pure ExitSuccess
             VLeft  e -> do
               runLogger $ logError $ T.pack $ prettyShow e
               pure $ ExitFailure 15
 
+  postRmLog vi =
+    forM_ (_viPostRemove =<< vi) $ \msg ->
+      runLogger $ logInfo msg

app/ghcup/GHCup/OptParse/Run.hs

@@ -5,6 +5,7 @@
 {-# LANGUAGE RankNTypes        #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TypeFamilies      #-}
+{-# LANGUAGE ViewPatterns      #-}
 module GHCup.OptParse.Run where
 
 
@@ -18,6 +19,7 @@ import           GHCup.Prelude
 import           GHCup.Prelude.File
 #ifdef IS_WINDOWS
 import           GHCup.Prelude.Process
+import           GHCup.Prelude.Process.Windows ( execNoMinGW )
 #endif
 import           GHCup.Prelude.Logger
 import           GHCup.Prelude.String.QQ
@@ -45,6 +47,7 @@ import qualified Data.Text                     as T
 #ifndef IS_WINDOWS
 import qualified System.Posix.Process          as SPP
 #endif
+import Data.Versions ( prettyVer, Version )
 
 
 
@@ -58,6 +61,7 @@ import qualified System.Posix.Process          as SPP
 data RunOptions = RunOptions
   { runAppendPATH :: Bool
   , runInstTool'  :: Bool
+  , runMinGWPath  :: Bool
   , runGHCVer     :: Maybe ToolVersion
   , runCabalVer   :: Maybe ToolVersion
   , runHLSVer     :: Maybe ToolVersion
@@ -82,9 +86,11 @@ runOpts =
           (short 'a' <> long "append" <> help "Append bin/ dir to PATH instead of prepending (this means that e.g. a system installation may take precedence)")
     <*> switch
           (short 'i' <> long "install" <> help "Install the tool, if missing")
+    <*> switch
+          (short 'm' <> long "mingw-path" <> help "On windows, add mingw64 PATHs to environment (does nothing on unix)")
     <*> optional
           (option
-            (eitherReader toolVersionEither)
+            (eitherReader ghcVersionTagEither)
             (metavar "GHC_VERSION" <> long "ghc" <> help "The ghc version"
             <> completer (tagCompleter GHC [])
             <> (completer $ versionCompleter Nothing GHC)
@@ -92,7 +98,7 @@ runOpts =
           )
     <*> optional
           (option
-            (eitherReader toolVersionEither)
+            (eitherReader toolVersionTagEither)
             (metavar "CABAL_VERSION" <> long "cabal" <> help "The cabal version"
             <> completer (tagCompleter Cabal [])
             <> (completer $ versionCompleter Nothing Cabal)
@@ -100,7 +106,7 @@ runOpts =
           )
     <*> optional
           (option
-            (eitherReader toolVersionEither)
+            (eitherReader toolVersionTagEither)
             (metavar "HLS_VERSION" <> long "hls" <> help "The HLS version"
             <> completer (tagCompleter HLS [])
             <> (completer $ versionCompleter Nothing HLS)
@@ -108,7 +114,7 @@ runOpts =
           )
     <*> optional
           (option
-            (eitherReader toolVersionEither)
+            (eitherReader toolVersionTagEither)
             (metavar "STACK_VERSION" <> long "stack" <> help "The stack version"
             <> completer (tagCompleter Stack [])
             <> (completer $ versionCompleter Nothing Stack)
@@ -171,6 +177,7 @@ type RunEffects = '[ AlreadyInstalled
                    , BuildFailed
                    , TagNotFound
                    , DigestError
+                   , ContentLengthError
                    , GPGError
                    , DownloadFailed
                    , TarDirDoesNotExist
@@ -213,7 +220,7 @@ runRUN appState action' = do
 
 
 
-run :: forall m. 
+run :: forall m .
        ( MonadFail m
        , MonadMask m
        , MonadCatch m
@@ -229,12 +236,16 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
    r <- if not runQuick
         then runRUN runAppState $ do
          toolchain <- liftE resolveToolchainFull
-         tmp <- liftIO $ createTmpDir toolchain
+
+         -- oh dear
+         r <- lift ask
+         tmp <- lift . lift . lift . flip runReaderT (fromAppState r) $ createTmpDir toolchain
+
          liftE $ installToolChainFull toolchain tmp
          pure tmp
         else runLeanRUN leanAppstate $ do
          toolchain <- resolveToolchain
-         tmp <- liftIO $ createTmpDir toolchain
+         tmp <- lift $ createTmpDir toolchain
          liftE $ installToolChain toolchain tmp
          pure tmp
    case r of
@@ -249,7 +260,9 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
                void $ liftIO $ SPP.executeFile cmd True args (Just newEnv)
                pure ExitSuccess
 #else
-               r' <- runLeanRUN leanAppstate $ liftE $ lEM @_ @'[ProcessError] $ exec cmd args Nothing (Just newEnv)
+               r' <- if runMinGWPath
+                     then runLeanRUN leanAppstate $ liftE $ lEM @_ @'[ProcessError] $ exec cmd args Nothing (Just newEnv)
+                     else runLeanRUN leanAppstate $ liftE $ lEM @_ @'[ProcessError] $ execNoMinGW cmd args Nothing (Just newEnv)
                case r' of
                  VRight _ -> pure ExitSuccess
                  VLeft e -> do
@@ -262,17 +275,6 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
 
   where
 
-   createTmpDir :: Toolchain -> IO FilePath
-   createTmpDir toolchain =
-     case runBinDir of
-           Just bindir -> do
-             createDirRecursive' bindir
-             canonicalizePath bindir
-           Nothing -> do
-             d <- predictableTmpDir toolchain
-             createDirRecursive' d
-             canonicalizePath d
-
    -- TODO: doesn't work for cross
    resolveToolchainFull :: ( MonadFail m
                            , MonadThrow m
@@ -290,29 +292,33 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
            pure v
          cabalVer <- forM runCabalVer $ \ver -> do
            (v, _) <- liftE $ fromVersion (Just ver) Cabal
-           pure v
+           pure (_tvVersion v)
          hlsVer <- forM runHLSVer $ \ver -> do
            (v, _) <- liftE $ fromVersion (Just ver) HLS
-           pure v
+           pure (_tvVersion v)
          stackVer <- forM runStackVer $ \ver -> do
            (v, _) <- liftE $ fromVersion (Just ver) Stack
-           pure v
+           pure (_tvVersion v)
          pure Toolchain{..}
 
    resolveToolchain = do
          ghcVer <- case runGHCVer of
-            Just (ToolVersion v) -> pure $ Just v
+            Just (GHCVersion v) -> pure $ Just v
+            Just (ToolVersion v) -> pure $ Just (mkTVer v)
             Nothing -> pure Nothing
             _ -> fail "Internal error"
          cabalVer <- case runCabalVer of
+            Just (GHCVersion v) -> pure $ Just (_tvVersion v)
             Just (ToolVersion v) -> pure $ Just v
             Nothing -> pure Nothing
             _ -> fail "Internal error"
          hlsVer <- case runHLSVer of
+            Just (GHCVersion v) -> pure $ Just (_tvVersion v)
             Just (ToolVersion v) -> pure $ Just v
             Nothing -> pure Nothing
             _ -> fail "Internal error"
          stackVer <- case runStackVer of
+            Just (GHCVersion v) -> pure $ Just (_tvVersion v)
             Just (ToolVersion v) -> pure $ Just v
             Nothing -> pure Nothing
             _ -> fail "Internal error"
@@ -338,6 +344,7 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
                               , DownloadFailed
                               , DirNotEmpty
                               , DigestError
+                              , ContentLengthError
                               , BuildFailed
                               , ArchiveResult
                               , AlreadyInstalled
@@ -347,35 +354,43 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
                               , MergeFileTreeError
                               ] (ResourceT (ReaderT AppState m)) ()
    installToolChainFull Toolchain{..} tmp = do
-         forM_ [(GHC,) <$> ghcVer, (Cabal,) <$> cabalVer, (HLS,) <$> hlsVer, (Stack,) <$> stackVer] $ \mt -> do
+         case ghcVer of
-           isInstalled <- maybe (pure False) (\(tool, v) -> lift $ checkIfToolInstalled' tool v) mt
+           Just v -> do
-           case mt of
+             isInstalled <- lift $ checkIfToolInstalled' GHC v
-             Just (GHC, v) -> do
+             unless isInstalled $ when (runInstTool' && isNothing (_tvTarget v)) $ void $ liftE $ installGHCBin
-               unless isInstalled $ when (runInstTool' && isNothing (_tvTarget v)) $ void $ liftE $ installGHCBin
+               (_tvVersion v)
-                 (_tvVersion v)
+               GHCupInternal
-                 GHCupInternal
+               False
-                 False
+               []
-                 []
+             setGHC' v tmp
-               setTool GHC v tmp
+           _ -> pure ()
-             Just (Cabal, v) -> do
+         case cabalVer of
-               unless isInstalled $ when runInstTool' $ void $ liftE $ installCabalBin
+           Just v -> do
-                 (_tvVersion v)
+             isInstalled <- lift $ checkIfToolInstalled' Cabal (mkTVer v)
-                 GHCupInternal
+             unless isInstalled $ when runInstTool' $ void $ liftE $ installCabalBin
-                 False
+               v
-               setTool Cabal v tmp
+               GHCupInternal
-             Just (Stack, v) -> do
+               False
-               unless isInstalled $ when runInstTool' $ void $ liftE $ installStackBin
+             setCabal' v tmp
-                 (_tvVersion v)
+           _ -> pure ()
-                 GHCupInternal
+         case stackVer of
-                 False
+           Just v -> do
-               setTool Stack v tmp
+             isInstalled <- lift $ checkIfToolInstalled' Stack (mkTVer v)
-             Just (HLS, v) -> do
+             unless isInstalled $ when runInstTool' $ void $ liftE $ installStackBin
-               unless isInstalled $ when runInstTool' $ void $ liftE $ installHLSBin
+               v
-                 (_tvVersion v)
+               GHCupInternal
-                 GHCupInternal
+               False
-                 False
+             setStack' v tmp
-               setTool HLS v tmp
+           _ -> pure ()
-             _ -> pure ()
+         case hlsVer of
+           Just v -> do
+             isInstalled <- lift $ checkIfToolInstalled' HLS (mkTVer v)
+             unless isInstalled $ when runInstTool' $ void $ liftE $ installHLSBin
+               v
+               GHCupInternal
+               False
+             setHLS' v tmp
+           _ -> pure ()
 
    installToolChain :: ( MonadFail m
                        , MonadThrow m
@@ -386,46 +401,47 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
                     -> FilePath
                     -> Excepts '[NotInstalled] (ReaderT LeanAppState m) ()
    installToolChain Toolchain{..} tmp = do
-         forM_ [(GHC,) <$> ghcVer, (Cabal,) <$> cabalVer, (HLS,) <$> hlsVer, (Stack,) <$> stackVer] $ \mt -> do
+         case ghcVer of
-           case mt of
+           Just v -> setGHC' v tmp
-             Just (GHC, v)   -> setTool GHC v tmp
+           _ -> pure ()
-             Just (Cabal, v) -> setTool Cabal v tmp
+         case cabalVer of
-             Just (Stack, v) -> setTool Stack v tmp
+           Just v -> setCabal' v tmp
-             Just (HLS, v)   -> setTool HLS v tmp
+           _ -> pure ()
-             _ -> pure ()
+         case stackVer of
+           Just v -> setStack' v tmp
+           _ -> pure ()
+         case hlsVer of
+           Just v -> setHLS' v tmp
+           _ -> pure ()
 
-   setTool tool v tmp =
+   setGHC' v tmp = do
-      case tool of
-        GHC -> do
           void $ liftE $ setGHC v SetGHC_XYZ (Just tmp)
           void $ liftE $ setGHC v SetGHCOnly (Just tmp)
-        Cabal -> do
+   setCabal' v tmp = do
-          bin  <- liftE $ whereIsTool Cabal v
+          bin  <- liftE $ whereIsTool Cabal (mkTVer v)
           cbin <- liftIO $ canonicalizePath bin
           lift $ createLink (relativeSymlink tmp cbin) (tmp </> ("cabal" <.> exeExt))
-        Stack -> do
+   setStack' v tmp = do
-          bin  <- liftE $ whereIsTool Stack v
+          bin  <- liftE $ whereIsTool Stack (mkTVer v)
           cbin <- liftIO $ canonicalizePath bin
           lift $ createLink (relativeSymlink tmp cbin) (tmp </> ("stack" <.> exeExt))
-        HLS -> do
+   setHLS' v tmp = do
           Dirs {..}  <- getDirs
-          let v' = _tvVersion v
+          legacy <- isLegacyHLS v
-          legacy <- isLegacyHLS v'
           if legacy
           then do
             -- TODO: factor this out
-            hlsWrapper <- liftE @_ @'[NotInstalled] $ hlsWrapperBinary v' !? (NotInstalled HLS (mkTVer v'))
+            hlsWrapper <- liftE @_ @'[NotInstalled] $ hlsWrapperBinary v !? (NotInstalled HLS (mkTVer v))
             cw <- liftIO $ canonicalizePath (binDir </> hlsWrapper)
             lift $ createLink (relativeSymlink tmp cw) (tmp </> takeFileName cw)
-            hlsBins <- hlsServerBinaries v' Nothing >>= liftIO . traverse (canonicalizePath . (binDir </>))
+            hlsBins <- hlsServerBinaries v Nothing >>= liftIO . traverse (canonicalizePath . (binDir </>))
             forM_ hlsBins $ \bin ->
               lift $ createLink (relativeSymlink tmp bin) (tmp </> takeFileName bin)
-            liftE $ setHLS (_tvVersion v) SetHLSOnly (Just tmp)
+            liftE $ setHLS v SetHLSOnly (Just tmp)
           else do
-            liftE $ setHLS (_tvVersion v) SetHLS_XYZ (Just tmp)
+            liftE $ setHLS v SetHLS_XYZ (Just tmp)
-            liftE $ setHLS (_tvVersion v) SetHLSOnly (Just tmp)
+            liftE $ setHLS v SetHLSOnly (Just tmp)
-        GHCup -> pure ()
+
-       
    addToPath path = do
     cEnv <- Map.fromList <$> getEnvironment
     let paths          = ["PATH", "Path"]
@@ -437,16 +453,38 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
     liftIO $ setEnv pathVar newPath
     return envWithNewPath
 
-   predictableTmpDir (Toolchain Nothing Nothing Nothing Nothing) =
+   createTmpDir :: ( MonadUnliftIO m
-     liftIO (getTemporaryDirectory >>= \tmp -> pure (tmp </> "ghcup-none"))
+                   , MonadCatch m
+                   , MonadThrow m
+                   , MonadMask m
+                   , MonadIO m
+                   )
+                => Toolchain
+                -> ReaderT LeanAppState m FilePath
+   createTmpDir toolchain =
+     case runBinDir of
+           Just bindir -> do
+             liftIO $ createDirRecursive' bindir
+             liftIO $ canonicalizePath bindir
+           Nothing -> do
+             d <- predictableTmpDir toolchain
+             liftIO $ createDirRecursive' d
+             liftIO $ canonicalizePath d
+
+   predictableTmpDir :: Monad m
+                     => Toolchain
+                     -> ReaderT LeanAppState m FilePath
+   predictableTmpDir (Toolchain Nothing Nothing Nothing Nothing) = do
+     Dirs { tmpDir } <- getDirs
+     pure (fromGHCupPath tmpDir </> "ghcup-none")
    predictableTmpDir Toolchain{..} = do
-      tmp <- getTemporaryDirectory
+      Dirs { tmpDir } <- getDirs
-      pure $ tmp
+      pure $ fromGHCupPath tmpDir
         </> ("ghcup-" <> intercalate "_"
               (  maybe [] ( (:[]) . ("ghc-"   <>) . T.unpack . tVerToText) ghcVer
-              <> maybe [] ( (:[]) . ("cabal-" <>) . T.unpack . tVerToText) cabalVer
+              <> maybe [] ( (:[]) . ("cabal-" <>) . T.unpack . prettyVer) cabalVer
-              <> maybe [] ( (:[]) . ("hls-"   <>) . T.unpack . tVerToText) hlsVer
+              <> maybe [] ( (:[]) . ("hls-"   <>) . T.unpack . prettyVer) hlsVer
-              <> maybe [] ( (:[]) . ("stack-" <>) . T.unpack . tVerToText) stackVer
+              <> maybe [] ( (:[]) . ("stack-" <>) . T.unpack . prettyVer) stackVer
               )
             )
 
@@ -460,7 +498,7 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
 
 data Toolchain = Toolchain
   { ghcVer     :: Maybe GHCTargetVersion
-  , cabalVer   :: Maybe GHCTargetVersion
+  , cabalVer   :: Maybe Version
-  , hlsVer     :: Maybe GHCTargetVersion
+  , hlsVer     :: Maybe Version
-  , stackVer   :: Maybe GHCTargetVersion
+  , stackVer   :: Maybe Version
-  }
+  } deriving Show

app/ghcup/GHCup/OptParse/Set.hs

@@ -74,7 +74,7 @@ data SetOptions = SetOptions
     --[ Parsers ]--
     ---------------
 
-          
+
 setParser :: Parser (Either SetCommand SetOptions)
 setParser =
   (Left <$> subparser
@@ -82,7 +82,7 @@ setParser =
           "ghc"
           (   SetGHC
           <$> info
-                (setOpts (Just GHC) <**> helper)
+                (setOpts GHC <**> helper)
                 (  progDesc "Set GHC version"
                 <> footerDoc (Just $ text setGHCFooter)
                 )
@@ -91,7 +91,7 @@ setParser =
            "cabal"
            (   SetCabal
            <$> info
-                 (setOpts (Just Cabal) <**> helper)
+                 (setOpts Cabal <**> helper)
                  (  progDesc "Set Cabal version"
                  <> footerDoc (Just $ text setCabalFooter)
                  )
@@ -100,7 +100,7 @@ setParser =
            "hls"
            (   SetHLS
            <$> info
-                 (setOpts (Just HLS) <**> helper)
+                 (setOpts HLS <**> helper)
                  (  progDesc "Set haskell-language-server version"
                  <> footerDoc (Just $ text setHLSFooter)
                  )
@@ -109,14 +109,14 @@ setParser =
            "stack"
            (   SetStack
            <$> info
-                 (setOpts (Just Stack) <**> helper)
+                 (setOpts Stack <**> helper)
                  (  progDesc "Set stack version"
                  <> footerDoc (Just $ text setStackFooter)
                  )
            )
       )
     )
-    <|> (Right <$> setOpts Nothing)
+    <|> (Right <$> setOpts GHC)
  where
   setGHCFooter :: String
   setGHCFooter = [s|Discussion:
@@ -137,22 +137,25 @@ setParser =
     Sets the the current haskell-language-server version.|]
 
 
-setOpts :: Maybe Tool -> Parser SetOptions
+setOpts :: Tool -> Parser SetOptions
 setOpts tool = SetOptions <$>
     (fromMaybe SetRecommended <$>
       optional (setVersionArgument (Just ListInstalled) tool))
 
-setVersionArgument :: Maybe ListCriteria -> Maybe Tool -> Parser SetToolVersion
+setVersionArgument :: Maybe ListCriteria -> Tool -> Parser SetToolVersion
 setVersionArgument criteria tool =
   argument (eitherReader setEither)
     (metavar "VERSION|TAG|next"
-    <> completer (tagCompleter (fromMaybe GHC tool) ["next"])
+    <> completer (tagCompleter tool ["next"])
-    <> foldMap (completer . versionCompleter criteria) tool)
+    <> (completer . versionCompleter criteria) tool)
  where
   setEither s' =
         parseSet s'
     <|> second SetToolTag (tagEither s')
-    <|> second SetToolVersion (tVersionEither s')
+    <|> se s'
+  se s' = case tool of
+           GHC -> second SetGHCVersion (ghcVersionEither s')
+           _   -> second SetToolVersion (toolVersionEither s')
   parseSet s' = case fmap toLower s' of
                   "next" -> Right SetNext
                   other  -> Left $ "Unknown tag/version " <> other
@@ -261,9 +264,9 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
   (Right sopts) -> do
     runLogger (logWarn "This is an old-style command for setting GHC. Use 'ghcup set ghc' instead.")
     setGHC' sopts
-  (Left (SetGHC sopts)) -> setGHC' sopts
+  (Left (SetGHC sopts))   -> setGHC'   sopts
   (Left (SetCabal sopts)) -> setCabal' sopts
-  (Left (SetHLS sopts)) -> setHLS' sopts
+  (Left (SetHLS sopts))   -> setHLS'   sopts
   (Left (SetStack sopts)) -> setStack' sopts
 
  where
@@ -271,7 +274,7 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
           -> m ExitCode
   setGHC' SetOptions{ sToolVer } =
     case sToolVer of
-      (SetToolVersion v) -> runSetGHC runLeanAppState (liftE $ setGHC v SetGHCOnly Nothing >> pure v)
+      (SetGHCVersion v) -> runSetGHC runLeanAppState (liftE $ setGHC v SetGHCOnly Nothing >> pure v)
       _ -> runSetGHC runAppState (do
           v <- liftE $ fst <$> fromVersion' sToolVer GHC
           liftE $ setGHC v SetGHCOnly Nothing
@@ -291,17 +294,17 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
             -> m ExitCode
   setCabal' SetOptions{ sToolVer } =
     case sToolVer of
-      (SetToolVersion v) -> runSetCabal runLeanAppState (liftE $ setCabal (_tvVersion v) >> pure v)
+      (SetToolVersion v) -> runSetCabal runLeanAppState (liftE $ setCabal v >> pure (mkTVer v))
       _ -> runSetCabal runAppState (do
           v <- liftE $ fst <$> fromVersion' sToolVer Cabal
           liftE $ setCabal (_tvVersion v)
           pure v
         )
       >>= \case
-            VRight GHCTargetVersion{..} -> do
+            VRight v -> do
               runLogger
                 $ logInfo $
-                    "Cabal " <> prettyVer _tvVersion <> " successfully set as default version"
+                    "Cabal " <> prettyVer (_tvVersion v) <> " successfully set as default version"
               pure ExitSuccess
             VLeft  e -> do
               runLogger $ logError $ T.pack $ prettyShow e
@@ -311,17 +314,17 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
           -> m ExitCode
   setHLS' SetOptions{ sToolVer } =
     case sToolVer of
-      (SetToolVersion v) -> runSetHLS runLeanAppState (liftE $ setHLS (_tvVersion v) SetHLSOnly Nothing >> pure v)
+      (SetToolVersion v) -> runSetHLS runLeanAppState (liftE $ setHLS v SetHLSOnly Nothing >> pure (mkTVer v))
       _ -> runSetHLS runAppState (do
           v <- liftE $ fst <$> fromVersion' sToolVer HLS
           liftE $ setHLS (_tvVersion v) SetHLSOnly Nothing
           pure v
         )
       >>= \case
-            VRight GHCTargetVersion{..} -> do
+            VRight v -> do
               runLogger
                 $ logInfo $
-                    "HLS " <> prettyVer _tvVersion <> " successfully set as default version"
+                    "HLS " <> prettyVer (_tvVersion v) <> " successfully set as default version"
               pure ExitSuccess
             VLeft  e -> do
               runLogger $ logError $ T.pack $ prettyShow e
@@ -332,17 +335,17 @@ set setCommand runAppState runLeanAppState runLogger = case setCommand of
             -> m ExitCode
   setStack' SetOptions{ sToolVer } =
     case sToolVer of
-      (SetToolVersion v) -> runSetStack runLeanAppState (liftE $ setStack (_tvVersion v) >> pure v)
+      (SetToolVersion v) -> runSetStack runLeanAppState (liftE $ setStack v >> pure (mkTVer v))
       _ -> runSetStack runAppState (do
             v <- liftE $ fst <$> fromVersion' sToolVer Stack
             liftE $ setStack (_tvVersion v)
             pure v
           )
       >>= \case
-            VRight GHCTargetVersion{..} -> do
+            VRight v -> do
               runLogger
                 $ logInfo $
-                    "Stack " <> prettyVer _tvVersion <> " successfully set as default version"
+                    "Stack " <> prettyVer (_tvVersion v) <> " successfully set as default version"
               pure ExitSuccess
             VLeft  e -> do
               runLogger $ logError $ T.pack $ prettyShow e

app/ghcup/GHCup/OptParse/Upgrade.hs

@@ -88,6 +88,7 @@ upgradeOptsP =
 
 
 type UpgradeEffects = '[ DigestError
+                       , ContentLengthError
                        , GPGError
                        , NoDownload
                        , NoUpdate

app/ghcup/GHCup/OptParse/Whereis.hs

@@ -32,6 +32,7 @@ import           Haskus.Utils.Variant.Excepts
 import           Options.Applicative     hiding ( style )
 import           Options.Applicative.Help.Pretty ( text )
 import           Prelude                 hiding ( appendFile )
+import           System.Environment
 import           System.Exit
 import           Text.PrettyPrint.HughesPJClass ( prettyShow )
 
@@ -75,14 +76,14 @@ data WhereisOptions = WhereisOptions {
     --[ Parsers ]--
     ---------------
 
-          
+
 whereisP :: Parser WhereisCommand
 whereisP = subparser
-  (commandGroup "Tools locations:" <> 
+  (commandGroup "Tools locations:" <>
     command
       "ghc"
       (WhereisTool GHC <$> info
-        ( optional (toolVersionArgument Nothing (Just GHC)) <**> helper )
+        ( optional (toolVersionTagArgument Nothing (Just GHC)) <**> helper )
         ( progDesc "Get GHC location"
         <> footerDoc (Just $ text whereisGHCFooter ))
       )
@@ -90,7 +91,7 @@ whereisP = subparser
      command
       "cabal"
       (WhereisTool Cabal <$> info
-        ( optional (toolVersionArgument Nothing (Just Cabal)) <**> helper )
+        ( optional (toolVersionTagArgument Nothing (Just Cabal)) <**> helper )
         ( progDesc "Get cabal location"
         <> footerDoc (Just $ text whereisCabalFooter ))
       )
@@ -98,7 +99,7 @@ whereisP = subparser
      command
       "hls"
       (WhereisTool HLS <$> info
-        ( optional (toolVersionArgument Nothing (Just HLS)) <**> helper )
+        ( optional (toolVersionTagArgument Nothing (Just HLS)) <**> helper )
         ( progDesc "Get HLS location"
         <> footerDoc (Just $ text whereisHLSFooter ))
       )
@@ -106,7 +107,7 @@ whereisP = subparser
      command
       "stack"
       (WhereisTool Stack <$> info
-        ( optional (toolVersionArgument Nothing (Just Stack)) <**> helper )
+        ( optional (toolVersionTagArgument Nothing (Just Stack)) <**> helper )
         ( progDesc "Get stack location"
         <> footerDoc (Just $ text whereisStackFooter ))
       )
@@ -268,7 +269,14 @@ whereis :: ( Monad m
 whereis whereisCommand whereisOptions runAppState leanAppstate runLogger = do
   Dirs{ .. }  <- runReaderT getDirs leanAppstate
   case (whereisCommand, whereisOptions) of
-    (WhereisTool tool (Just (ToolVersion v)), WhereisOptions{..}) ->
+    (WhereisTool GHCup _, WhereisOptions{..}) -> do
+      loc <- liftIO (getExecutablePath >>= canonicalizePath )
+      if directory
+      then liftIO $ putStr $ takeDirectory loc
+      else liftIO $ putStr loc
+      pure ExitSuccess
+
+    (WhereisTool tool (Just (GHCVersion v)), WhereisOptions{..}) ->
       runLeanWhereIs leanAppstate (do
         loc <- liftE $ whereIsTool tool v
         if directory
@@ -282,6 +290,20 @@ whereis whereisCommand whereisOptions runAppState leanAppstate runLogger = do
               VLeft e -> do
                 runLogger $ logError $ T.pack $ prettyShow e
                 pure $ ExitFailure 30
+    (WhereisTool tool (Just (ToolVersion v)), WhereisOptions{..}) ->
+      runLeanWhereIs leanAppstate (do
+        loc <- liftE $ whereIsTool tool (mkTVer v)
+        if directory
+        then pure $ takeDirectory loc
+        else pure loc
+        )
+        >>= \case
+              VRight r -> do
+                liftIO $ putStr r
+                pure ExitSuccess
+              VLeft e -> do
+                runLogger $ logError $ T.pack $ prettyShow e
+                pure $ ExitFailure 30
 
     (WhereisTool tool whereVer, WhereisOptions{..}) -> do
       runWhereIs runAppState (do

app/ghcup/Main.hs

@@ -14,6 +14,8 @@ module Main where
 import           BrickMain                    ( brickMain )
 #endif
 
+import qualified GHCup.GHC as GHC
+import qualified GHCup.HLS as HLS
 import           GHCup.OptParse
 
 import           GHCup.Download
@@ -77,6 +79,7 @@ toSettings options = do
    mergeConf Options{..} UserSettings{..} noColor =
      let cache       = fromMaybe (fromMaybe (Types.cache defaultSettings) uCache) optCache
          metaCache   = fromMaybe (fromMaybe (Types.metaCache defaultSettings) uMetaCache) optMetaCache
+         metaMode    = fromMaybe (fromMaybe (Types.metaMode defaultSettings) uMetaMode) optMetaMode
          noVerify    = fromMaybe (fromMaybe (Types.noVerify defaultSettings) uNoVerify) optNoVerify
          verbose     = fromMaybe (fromMaybe (Types.verbose defaultSettings) uVerbose) optVerbose
          keepDirs    = fromMaybe (fromMaybe (Types.keepDirs defaultSettings) uKeepDirs) optKeepDirs
@@ -85,6 +88,7 @@ toSettings options = do
          urlSource   = maybe (fromMaybe (Types.urlSource defaultSettings) uUrlSource) (OwnSource . (:[]) . Right) optUrlSource
          noNetwork   = fromMaybe (fromMaybe (Types.noNetwork defaultSettings) uNoNetwork) optNoNetwork
          gpgSetting  = fromMaybe (fromMaybe (Types.gpgSetting defaultSettings) uGPGSetting) optGpg
+         platformOverride = optPlatform <|> (uPlatformOverride <|> Types.platformOverride defaultSettings)
      in (Settings {..}, keyBindings)
 #if defined(INTERNAL_DOWNLOADER)
    defaultDownloader = Internal
@@ -158,7 +162,7 @@ ENV variables:
   * GHCUP_INSTALL_BASE_PREFIX: the base of ghcup (default: $HOME)
   * GHCUP_USE_XDG_DIRS: set to anything to use XDG style directories
 
-Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
+Report bugs at <https://github.com/haskell/ghcup-hs/issues>|]
 
   customExecParser
       (prefs showHelpOnError)
@@ -196,18 +200,18 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
 
 
           let appState = do
-                pfreq <- (
+                pfreq <- case platformOverride settings of
-                  runLogger . runE @'[NoCompatiblePlatform, NoCompatibleArch, DistroNotFound] . liftE $ platformRequest
+                           Just pfreq' -> return pfreq'
-                  ) >>= \case
+                           Nothing -> (runLogger . runE @'[NoCompatiblePlatform, NoCompatibleArch, DistroNotFound] . liftE $ platformRequest) >>= \case
-                          VRight r -> pure r
+                                          VRight r -> pure r
-                          VLeft e -> do
+                                          VLeft e -> do
-                            runLogger
+                                            runLogger
-                              (logError $ T.pack $ prettyShow e)
+                                              (logError $ T.pack $ prettyShow e)
-                            exitWith (ExitFailure 2)
+                                            exitWith (ExitFailure 2)
 
                 ghcupInfo <-
                   ( flip runReaderT leanAppstate
-                    . runE @'[DigestError, GPGError, JSONError , DownloadFailed, FileDoesNotExistError]
+                    . runE @'[DigestError, ContentLengthError, GPGError, JSONError , DownloadFailed, FileDoesNotExistError]
                     $ liftE getDownloadsF
                     )
                     >>= \case
@@ -236,7 +240,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                     | Just False <- optVerbose -> pure ()
                     | otherwise -> lookupEnv "GHCUP_SKIP_UPDATE_CHECK" >>= \case
                          Nothing -> void . flip runReaderT s' . runE @'[TagNotFound, NextVerNotFound, NoToolVersionSet] $ do
-                           newTools <- lift checkForUpdates 
+                           newTools <- lift checkForUpdates
                            forM_ newTools $ \newTool@(t, l) -> do
                              -- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/283
                              alreadyInstalling' <- alreadyInstalling optCommand newTool
@@ -250,7 +254,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                                         logWarn ("New "
                                           <> T.pack (prettyShow t)
                                           <> " version available. "
-                                          <> "To upgrade, run 'ghcup install "
+                                          <> "If you want to install this latest version, run 'ghcup install "
                                           <> T.pack (prettyShow t)
                                           <> " "
                                           <> prettyVer l
@@ -277,7 +281,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
               runAppState action' = do
                 s' <- liftIO appState
                 runReaderT action' s'
-                  
+
 
           -----------------
           -- Run command --
@@ -337,14 +341,16 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
   alreadyInstalling (Install (Left (InstallHLS InstallOptions{..})))     (HLS, ver)   = cmp' HLS instVer ver
   alreadyInstalling (Install (Left (InstallStack InstallOptions{..})))   (Stack, ver) = cmp' Stack instVer ver
   alreadyInstalling (Compile (CompileGHC GHCCompileOptions{ ovewrwiteVer = Just over }))
-    (GHC, ver)   = cmp' GHC (Just $ ToolVersion (mkTVer over)) ver
+    (GHC, ver)   = cmp' GHC (Just $ GHCVersion (mkTVer over)) ver
-  alreadyInstalling (Compile (CompileGHC GHCCompileOptions{ targetGhc = Left tver }))
+  alreadyInstalling (Compile (CompileGHC GHCCompileOptions{ targetGhc = GHC.SourceDist tver }))
-    (GHC, ver)   = cmp' GHC (Just $ ToolVersion (mkTVer tver)) ver
+    (GHC, ver)   = cmp' GHC (Just $ ToolVersion tver) ver
-  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ ovewrwiteVer = Just over }))
+  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ ovewrwiteVer = Right over }))
-    (HLS, ver)   = cmp' HLS (Just $ ToolVersion (mkTVer over)) ver
+    (HLS, ver)   = cmp' HLS (Just $ ToolVersion over) ver
-  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ targetHLS = Left tver }))
+  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ targetHLS = HLS.SourceDist tver }))
-    (HLS, ver)   = cmp' HLS (Just $ ToolVersion (mkTVer tver)) ver
+    (HLS, ver)   = cmp' HLS (Just $ ToolVersion tver) ver
-  alreadyInstalling (Upgrade _ _ _) (GHCup, _) = pure True
+  alreadyInstalling (Compile (CompileHLS HLSCompileOptions{ targetHLS = HLS.HackageDist tver }))
+    (HLS, ver)   = cmp' HLS (Just $ ToolVersion tver) ver
+  alreadyInstalling (Upgrade {}) (GHCup, _) = pure True
   alreadyInstalling _ _ = pure False
 
   cmp' :: ( HasLog env

cabal.project

@@ -5,7 +5,6 @@ optional-packages: ./vendored/*/*.cabal
 optimization: 2
 
 package ghcup
-    tests: True
     flags: +tui
 
 source-repository-package

cbits/dirutils.h

@@ -1,6 +1,7 @@
 #ifndef POSIXPATHS_CBITS_DIRUTILS_H
 #define POSIXPATHS_CBITS_DIRUTILS_H
 
+#include <HsFFI.h>
 #include <stdlib.h>
 #include <dirent.h>
 #include <sys/types.h>

data/config.yaml

@@ -40,6 +40,12 @@ key-bindings:
 # of the file. These usually are in '~/.ghcup/cache/ghcup-<ver>.yaml'.
 meta-cache: 300 # in seconds
 
+# When trying to download ghcup metadata, this option decides what to do
+# when the download fails:
+#   1. Lax: use existing ~/.ghcup/cache/ghcup-<ver>.yaml as fallback (default)
+#   2. Strict: fail hard
+meta-mode: Lax # Strict | Lax
+
 # Where to get GHC/cabal/hls download info/versions from. For more detailed explanation
 # check the 'URLSource' type in the code.
 url-source:
@@ -75,3 +81,14 @@ url-source:
   # AddSource:
     # - Right: "file:///home/jule/git/ghcup-hs/ghcup-prereleases.yaml"
     # - Right: "file:///home/jule/git/ghcup-hs/ghcup-custom.yaml"
+
+# This is a way to override platform detection, e.g. when you're running
+# a Ubuntu derivate based on 18.04, you could do:
+#
+# platform-override:
+#   arch: A_64
+#   platform:
+#     contents: Ubuntu
+#     tag: Linux
+#   version: '18.04'
+platform-override: null

docker/alpine32/Dockerfile

@@ -0,0 +1,71 @@
+FROM i386/alpine:3.12
+
+ENV LANG C.UTF-8
+
+RUN apk add --no-cache \
+            curl \
+            gcc \
+            g++ \
+            binutils \
+            binutils-gold \
+			coreutils \
+            bsd-compat-headers \
+            gmp-dev \
+            ncurses-dev \
+            libffi-dev \
+            make \
+            xz \
+            tar \
+            perl \
+            bash \
+            diffutils \
+            git \
+			gzip \
+			gnupg && \
+    apk add --no-cache \
+            zlib \
+            zlib-dev \
+            zlib-static \
+            bzip2 \
+            bzip2-dev \
+            bzip2-static \
+            gmp \
+            gmp-dev \
+            openssl-dev \
+            openssl-libs-static \
+            xz \
+            xz-dev \
+            ncurses-static
+
+ARG GHCUP_VERSION=0.1.18.0
+ARG GPG_KEY=7784930957807690A66EBDBE3786C5262ECB4A3F
+
+# install ghcup
+RUN gpg --batch --keyserver keys.openpgp.org --recv-keys $GPG_KEY && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/i386-linux-ghcup-$GHCUP_VERSION && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS.sig && \
+    gpg --verify SHA256SUMS.sig SHA256SUMS && \
+    sha256sum -c --ignore-missing SHA256SUMS && \
+    mv i386-linux-ghcup-$GHCUP_VERSION /usr/bin/ghcup && \
+    chmod +x /usr/bin/ghcup && \
+    rm -rf SHA256SUMS SHA256SUMS.sig
+
+ARG GHC=8.10.7
+ARG CABAL_INSTALL=3.6.2.0
+ARG STACK=2.9.1
+
+ENV GHCUP_CURL_OPTS="--silent"
+ENV NO_COLOR=1
+
+# install haskell toolchain
+RUN ghcup config set gpg-setting GPGStrict && \
+	ghcup --verbose install ghc   --isolate=/usr     --force ${GHC} && \
+	ghcup --verbose install cabal --isolate=/usr/bin --force ${CABAL_INSTALL} && \
+	find "/usr/lib/ghc-${GHC}/" \( -name "*_p.a" -o -name "*.p_hi" \) -type f -delete && \
+	rm -r "/usr/share/doc/ghc-${GHC}" && \
+	rm -rf /tmp/ghcup* && \
+	ghcup gc -p -s -c -t
+
+ENV PATH /root/.cabal/bin:/root/.ghcup:/root/.local/bin:$PATH
+

docker/alpine64/Dockerfile

@@ -0,0 +1,71 @@
+FROM alpine:3.12
+
+ENV LANG C.UTF-8
+
+RUN apk add --no-cache \
+            curl \
+            gcc \
+            g++ \
+            binutils \
+            binutils-gold \
+			coreutils \
+            bsd-compat-headers \
+            gmp-dev \
+            ncurses-dev \
+            libffi-dev \
+            make \
+            xz \
+            tar \
+            perl \
+            bash \
+            diffutils \
+            git \
+			gzip \
+			gnupg && \
+    apk add --no-cache \
+            zlib \
+            zlib-dev \
+            zlib-static \
+            bzip2 \
+            bzip2-dev \
+            bzip2-static \
+            gmp \
+            gmp-dev \
+            openssl-dev \
+            openssl-libs-static \
+            xz \
+            xz-dev \
+            ncurses-static
+
+ARG GHCUP_VERSION=0.1.18.0
+ARG GPG_KEY=7784930957807690A66EBDBE3786C5262ECB4A3F
+
+# install ghcup
+RUN gpg --batch --keyserver keys.openpgp.org --recv-keys $GPG_KEY && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/x86_64-linux-ghcup-$GHCUP_VERSION && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS.sig && \
+    gpg --verify SHA256SUMS.sig SHA256SUMS && \
+    sha256sum -c --ignore-missing SHA256SUMS && \
+    mv x86_64-linux-ghcup-$GHCUP_VERSION /usr/bin/ghcup && \
+    chmod +x /usr/bin/ghcup && \
+    rm -rf SHA256SUMS SHA256SUMS.sig
+
+ARG GHC=8.10.7
+ARG CABAL_INSTALL=3.6.2.0
+ARG STACK=2.9.1
+
+ENV GHCUP_CURL_OPTS="--silent"
+ENV NO_COLOR=1
+
+# install haskell toolchain
+RUN ghcup config set gpg-setting GPGStrict && \
+	ghcup --verbose install ghc   --isolate=/usr     --force ${GHC} && \
+	ghcup --verbose install cabal --isolate=/usr/bin --force ${CABAL_INSTALL} && \
+	find "/usr/lib/ghc-${GHC}/" \( -name "*_p.a" -o -name "*.p_hi" \) -type f -delete && \
+	rm -r "/usr/share/doc/ghc-${GHC}" && \
+	rm -rf /tmp/ghcup* && \
+	ghcup gc -p -s -c -t
+
+ENV PATH /root/.cabal/bin:/root/.ghcup:/root/.local/bin:$PATH
+

docker/arm32v7/Dockerfile

@@ -0,0 +1,64 @@
+FROM arm32v7/ubuntu:focal
+
+ENV LANG C.UTF-8
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=Asia/Singapore
+
+COPY update_opt.sh /usr/bin/update_opt.sh
+RUN chmod +x /usr/bin/update_opt.sh
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        ca-certificates \
+        curl \
+        dirmngr \
+        g++ \
+        git \
+        gnupg \
+        libsqlite3-dev \
+        libtinfo-dev \
+        libgmp-dev \
+        make \
+        netbase \
+        openssh-client \
+        xz-utils \
+        zlib1g-dev \
+		libnuma-dev libgmp10 libssl-dev liblzma-dev libbz2-dev wget lsb-release software-properties-common apt-transport-https gcc autoconf automake build-essential gzip patchelf tree \
+		llvm-9 clang-9 && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN update_opt.sh 9 1
+
+ARG GHCUP_VERSION=0.1.17.8
+ARG GPG_KEY=7784930957807690A66EBDBE3786C5262ECB4A3F
+
+# install ghcup
+RUN gpg --batch --keyserver keys.openpgp.org --recv-keys $GPG_KEY && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/armv7-linux-ghcup-$GHCUP_VERSION && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS.sig && \
+    gpg --verify SHA256SUMS.sig SHA256SUMS && \
+    sha256sum -c --ignore-missing SHA256SUMS && \
+    mv armv7-linux-ghcup-$GHCUP_VERSION /usr/bin/ghcup && \
+    chmod +x /usr/bin/ghcup && \
+    rm -rf SHA256SUMS SHA256SUMS.sig
+
+ARG GHC=8.10.7
+ARG CABAL_INSTALL=3.6.2.0
+ARG STACK=2.9.1
+
+ENV GHCUP_CURL_OPTS="--silent"
+ENV NO_COLOR=1
+
+# install haskell toolchain
+RUN ghcup config set gpg-setting GPGStrict && \
+	ghcup --verbose install ghc   --isolate=/usr     --force ${GHC} && \
+	ghcup --verbose install cabal --isolate=/usr/bin --force ${CABAL_INSTALL} && \
+	find "/usr/lib/ghc-${GHC}/" \( -name "*_p.a" -o -name "*.p_hi" \) -type f -delete && \
+	rm -r "/usr/share/doc/ghc-${GHC}" && \
+	rm -rf /tmp/ghcup* && \
+	ghcup gc -p -s -c -t
+
+ENV PATH /root/.cabal/bin:/root/.ghcup/bin:/root/.local/bin:$PATH
+
+CMD ["ghci"]

docker/arm32v7/update_opt.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+# update_alternatives.sh
+
+update_alternatives() {
+    local version=${1}
+    local priority=${2}
+    local master=${3}
+    local slaves=${4}
+    local path=${5}
+    local cmdln
+
+    cmdln="--verbose --install ${path}${master} ${master} ${path}${master}-${version} ${priority}"
+    for slave in ${slaves}; do
+        cmdln="${cmdln} --slave ${path}${slave} ${slave} ${path}${slave}-${version}"
+    done
+    update-alternatives ${cmdln}
+}
+
+if [[ ${#} -ne 2 ]]; then
+    echo usage: "${0}" clang_version priority
+    exit 1
+fi
+
+version=${1}
+priority=${2}
+path="/usr/bin/"
+
+master="llvm-config"
+slaves="llvm-addr2line llvm-ar llvm-as llvm-bcanalyzer llvm-bitcode-strip llvm-cat llvm-cfi-verify llvm-cov llvm-c-test llvm-cvtres llvm-cxxdump llvm-cxxfilt llvm-cxxmap llvm-debuginfod llvm-debuginfod-find llvm-diff llvm-dis llvm-dlltool llvm-dwarfdump llvm-dwarfutil llvm-dwp llvm-exegesis llvm-extract llvm-gsymutil llvm-ifs llvm-install-name-tool llvm-jitlink llvm-jitlink-executor llvm-lib llvm-libtool-darwin llvm-link llvm-lipo llvm-lto llvm-lto2 llvm-mc llvm-mca llvm-ml llvm-modextract llvm-mt llvm-nm llvm-objcopy llvm-objdump llvm-omp-device-info llvm-opt-report llvm-otool llvm-pdbutil llvm-PerfectShuffle llvm-profdata llvm-profgen llvm-ranlib llvm-rc llvm-readelf llvm-readobj llvm-reduce llvm-remark-size-diff llvm-rtdyld llvm-sim llvm-size llvm-split llvm-stress llvm-strings llvm-strip llvm-symbolizer llvm-tapi-diff llvm-tblgen llvm-tli-checker llvm-undname llvm-windres llvm-xray"
+
+update_alternatives "${version}" "${priority}" "${master}" "${slaves}" "${path}"
+
+master="clang"
+slaves="analyze-build asan_symbolize bugpoint c-index-test clang++ clang-apply-replacements clang-change-namespace clang-check clang-cl clang-cpp clangd clang-doc clang-extdef-mapping clang-format clang-format-diff clang-include-fixer clang-linker-wrapper clang-move clang-nvlink-wrapper clang-offload-bundler clang-offload-packager clang-offload-wrapper clang-pseudo clang-query clang-refactor clang-rename clang-reorder-fields clang-repl clang-scan-deps clang-tidy count diagtool dsymutil FileCheck find-all-symbols git-clang-format hmaptool hwasan_symbolize intercept-build ld64.lld ld.lld llc lld lldb lldb-argdumper lldb-instr lldb-server lldb-vscode lld-link lli lli-child-target modularize not obj2yaml opt pp-trace run-clang-tidy sancov sanstats scan-build scan-build-py scan-view split-file UnicodeNameMappingGenerator verify-uselistorder wasm-ld yaml2obj yaml-bench"
+
+update_alternatives "${version}" "${priority}" "${master}" "${slaves}" "${path}"

docker/arm64v8/Dockerfile

@@ -0,0 +1,64 @@
+FROM arm64v8/ubuntu:focal
+
+ENV LANG C.UTF-8
+ENV DEBIAN_FRONTEND=noninteractive
+ENV TZ=Asia/Singapore
+
+COPY update_opt.sh /usr/bin/update_opt.sh
+RUN chmod +x /usr/bin/update_opt.sh
+
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+        ca-certificates \
+        curl \
+        dirmngr \
+        g++ \
+        git \
+        gnupg \
+        libsqlite3-dev \
+        libtinfo-dev \
+        libgmp-dev \
+        make \
+        netbase \
+        openssh-client \
+        xz-utils \
+        zlib1g-dev \
+		libnuma-dev libgmp10 libssl-dev liblzma-dev libbz2-dev wget lsb-release software-properties-common apt-transport-https gcc autoconf automake build-essential gzip patchelf tree \
+		llvm-9 clang-9 && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN update_opt.sh 9 1
+
+ARG GHCUP_VERSION=0.1.18.0
+ARG GPG_KEY=7784930957807690A66EBDBE3786C5262ECB4A3F
+
+# install ghcup
+RUN gpg --batch --keyserver keys.openpgp.org --recv-keys $GPG_KEY && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/aarch64-linux-ghcup-$GHCUP_VERSION && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS && \
+    curl -sSfL -O https://downloads.haskell.org/~ghcup/$GHCUP_VERSION/SHA256SUMS.sig && \
+    gpg --verify SHA256SUMS.sig SHA256SUMS && \
+    sha256sum -c --ignore-missing SHA256SUMS && \
+    mv aarch64-linux-ghcup-$GHCUP_VERSION /usr/bin/ghcup && \
+    chmod +x /usr/bin/ghcup && \
+    rm -rf SHA256SUMS SHA256SUMS.sig
+
+ARG GHC=8.10.7
+ARG CABAL_INSTALL=3.6.2.0
+ARG STACK=2.9.1
+
+ENV GHCUP_CURL_OPTS="--silent"
+ENV NO_COLOR=1
+
+# install haskell toolchain
+RUN ghcup config set gpg-setting GPGStrict && \
+	ghcup --verbose install ghc   --isolate=/usr     --force ${GHC} && \
+	ghcup --verbose install cabal --isolate=/usr/bin --force ${CABAL_INSTALL} && \
+	find "/usr/lib/ghc-${GHC}/" \( -name "*_p.a" -o -name "*.p_hi" \) -type f -delete && \
+	rm -r "/usr/share/doc/ghc-${GHC}" && \
+	rm -rf /tmp/ghcup* && \
+	ghcup gc -p -s -c -t
+
+ENV PATH /root/.cabal/bin:/root/.ghcup/bin:/root/.local/bin:$PATH
+
+CMD ["ghci"]

docker/arm64v8/update_opt.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+# update_alternatives.sh
+
+update_alternatives() {
+    local version=${1}
+    local priority=${2}
+    local master=${3}
+    local slaves=${4}
+    local path=${5}
+    local cmdln
+
+    cmdln="--verbose --install ${path}${master} ${master} ${path}${master}-${version} ${priority}"
+    for slave in ${slaves}; do
+        cmdln="${cmdln} --slave ${path}${slave} ${slave} ${path}${slave}-${version}"
+    done
+    update-alternatives ${cmdln}
+}
+
+if [[ ${#} -ne 2 ]]; then
+    echo usage: "${0}" clang_version priority
+    exit 1
+fi
+
+version=${1}
+priority=${2}
+path="/usr/bin/"
+
+master="llvm-config"
+slaves="llvm-addr2line llvm-ar llvm-as llvm-bcanalyzer llvm-bitcode-strip llvm-cat llvm-cfi-verify llvm-cov llvm-c-test llvm-cvtres llvm-cxxdump llvm-cxxfilt llvm-cxxmap llvm-debuginfod llvm-debuginfod-find llvm-diff llvm-dis llvm-dlltool llvm-dwarfdump llvm-dwarfutil llvm-dwp llvm-exegesis llvm-extract llvm-gsymutil llvm-ifs llvm-install-name-tool llvm-jitlink llvm-jitlink-executor llvm-lib llvm-libtool-darwin llvm-link llvm-lipo llvm-lto llvm-lto2 llvm-mc llvm-mca llvm-ml llvm-modextract llvm-mt llvm-nm llvm-objcopy llvm-objdump llvm-omp-device-info llvm-opt-report llvm-otool llvm-pdbutil llvm-PerfectShuffle llvm-profdata llvm-profgen llvm-ranlib llvm-rc llvm-readelf llvm-readobj llvm-reduce llvm-remark-size-diff llvm-rtdyld llvm-sim llvm-size llvm-split llvm-stress llvm-strings llvm-strip llvm-symbolizer llvm-tapi-diff llvm-tblgen llvm-tli-checker llvm-undname llvm-windres llvm-xray"
+
+update_alternatives "${version}" "${priority}" "${master}" "${slaves}" "${path}"
+
+master="clang"
+slaves="analyze-build asan_symbolize bugpoint c-index-test clang++ clang-apply-replacements clang-change-namespace clang-check clang-cl clang-cpp clangd clang-doc clang-extdef-mapping clang-format clang-format-diff clang-include-fixer clang-linker-wrapper clang-move clang-nvlink-wrapper clang-offload-bundler clang-offload-packager clang-offload-wrapper clang-pseudo clang-query clang-refactor clang-rename clang-reorder-fields clang-repl clang-scan-deps clang-tidy count diagtool dsymutil FileCheck find-all-symbols git-clang-format hmaptool hwasan_symbolize intercept-build ld64.lld ld.lld llc lld lldb lldb-argdumper lldb-instr lldb-server lldb-vscode lld-link lli lli-child-target modularize not obj2yaml opt pp-trace run-clang-tidy sancov sanstats scan-build scan-build-py scan-view split-file UnicodeNameMappingGenerator verify-uselistorder wasm-ld yaml2obj yaml-bench"
+
+update_alternatives "${version}" "${priority}" "${master}" "${slaves}" "${path}"

docs/about.md

@@ -42,8 +42,8 @@ All you wanted to know about GHCup.
 
 ## How to help
 
-* if you want to contribute code or documentation, check out the [issue tracker](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues) and the [Development guide](./dev.md)
+* if you want to contribute code or documentation, check out the [issue tracker](https://github.com/haskell/ghcup-hs/issues) and the [Development guide](./dev.md)
-* if you want to propose features or write user feedback, feel free to [open a ticket](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/new?issue)
+* if you want to propose features or write user feedback, feel free to [open a ticket](https://github.com/haskell/ghcup-hs/issues/new)
 * if you want to donate to the project, visit our [opencollective](https://opencollective.com/ghcup#category-CONTRIBUTE) page
 
 ## Design goals
@@ -60,6 +60,29 @@ All you wanted to know about GHCup.
 3. handling cabal projects
 4. being a stack alternative
 
+## Distribution policies
+
+Like most Linux distros and other distribution channels, GHCup also
+follows certain policies. These are as follows:
+
+1. The end-user experience is our primary concern
+    - ghcup in CI systems as a use case is a first class citizen
+2. We strive to collaborate with all maintainers of all the tools we support and maintain a good relationship
+3. We may fix build system or other distribution bugs in upstream bindists
+    - these are always communicated upstream
+4. We may even patch source code of supported tools in very rare cases if that is required to ensure that the end-user experience does not break
+    - we'll first try to upstream any such required patch and demand a new release to avoid downstream patching
+    - patches will be communicated to the maintainers either way and we'll strive to get their review
+    - they will also be communicated to the end-user
+    - they will be uploaded along with the bindist
+    - we will avoid maintaining long-running downstream patches (currently zero)
+5. We may add bindists for platforms that upstream does not support
+    - this is currently the case for GHC for e.g. Alpine and possibly FreeBSD in the future
+    - this is currently also the case for stack on darwin M1
+    - we don't guarantee for unofficial bindists that the test suite passes at the moment (this may change in the future)
+6. We GPG sign all the GHCup metadata as well as the unofficial bindists
+    - any trust issues relating to missing checksums or GPG signatures is a bug and given high priority
+
 ## How
 
 Installs a specified GHC version into `~/.ghcup/ghc/<ver>`, and places `ghc-<ver>` symlinks in `~/.ghcup/bin/`.
@@ -74,13 +97,16 @@ cabal-install/HLS/stack are installed in `~/.ghcup/bin/<tool>-<ver>` and have un
 
 ## Known users
 
-* Github actions:
+* CI:
-	- [actions/virtual-environments](https://github.com/actions/virtual-environments)
+    - [Github actions/virtual-environments](https://github.com/actions/virtual-environments)
-	- [haskell/actions/setup](https://github.com/haskell/actions/tree/main/setup)
+    - [Github haskell/actions/setup](https://github.com/haskell/actions/tree/main/setup)
+    - [haskell-ci](https://github.com/haskell-CI/haskell-ci)
 * mirrors:
-	- [sjtug](https://mirror.sjtu.edu.cn/docs/ghcup)
+    - [sjtug](https://mirror.sjtu.edu.cn/docs/ghcup)
 * tools:
-	- [vabal](https://github.com/Franciman/vabal)
+    - [vscode-haskell](https://github.com/haskell/vscode-haskell)
+    - [nvim-lsp-installer](https://github.com/williamboman/nvim-lsp-installer)
+    - [vabal](https://github.com/Franciman/vabal)
 
 ## Known problems
 
@@ -152,6 +178,11 @@ Windows 7 and Powershell 2.0 aren't well supported at the moment, also see:
 
 ## FAQ
 
+### Is ghcup really the main installer?
+
+This is based on the Haskell survey results from 2022, which show that more
+than half of survey participants use GHCup: https://taylor.fausak.me/2022/11/18/haskell-survey-results/
+
 ### Why reimplement stack?
 
 GHCup is not a reimplementation of stack. The only common part is automatic installation of GHC,

docs/dev.md

@@ -69,9 +69,9 @@ Head over to: [https://github.com/haskell/ghcup-metadata#adding-a-new-ghc-versio
 
 ### Adding a new CLI command
 
-An example illustration on how to deal with [optparse-applicative](https://hackage.haskell.org/package/optparse-applicative) can be seen here: [https://gitlab.haskell.org/haskell/ghcup-hs/-/commit/c19dd5ee8b2edbaf0336af143f1c75b6f4843e26](https://gitlab.haskell.org/haskell/ghcup-hs/-/commit/c19dd5ee8b2edbaf0336af143f1c75b6f4843e26)
+An example illustration on how to deal with [optparse-applicative](https://hackage.haskell.org/package/optparse-applicative) can be seen here: [https://github.com/haskell/ghcup-hs/commit/c19dd5ee8b2edbaf0336af143f1c75b6f4843e26](https://github.com/haskell/ghcup-hs/commit/c19dd5ee8b2edbaf0336af143f1c75b6f4843e26)
 
-Every subcommand now lives in its own module under [GHCup.OptParse.MyCommand](https://gitlab.haskell.org/haskell/ghcup-hs/-/tree/master/app/ghcup/GHCup/OptParse).
+Every subcommand now lives in its own module under [GHCup.OptParse.MyCommand](https://github.com/haskell/ghcup-hs/tree/master/app/ghcup/GHCup/OptParse).
 
 ## Major refactors
 

docs/guide.md

@@ -4,7 +4,7 @@ This is a more in-depth guide specific to GHCup. `ghcup --help` is your friend.
 
 ## Basic usage
 
-For the simple interactive TUI (not available on windows), run:
+For the simple, interactive, text-based user interface (TUI) (not available on windows), run:
 
 ```sh
 ghcup tui
@@ -50,7 +50,7 @@ For man pages to work you need [man-db](http://man-db.nongnu.org/) as your `man`
 
 ## Shell-completion
 
-Shell completions are in [scripts/shell-completions](https://gitlab.haskell.org/haskell/ghcup-hs/-/tree/master/scripts/shell-completions) directory of this repository.
+Shell completions are in [scripts/shell-completions](https://github.com/haskell/ghcup-hs/tree/master/scripts/shell-completions) directory of this repository.
 
 For bash: install `shell-completions/bash`
 as e.g. `/etc/bash_completion.d/ghcup` (depending on distro)
@@ -67,10 +67,24 @@ and make sure your bashrc sources the startup script
 # Configuration
 
 A configuration file can be put in `~/.ghcup/config.yaml`. The default config file
-explaining all possible configurations can be found in this repo: [config.yaml](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/data/config.yaml).
+explaining all possible configurations can be found in this repo: [config.yaml](https://github.com/haskell/ghcup-hs/blob/master/data/config.yaml).
 
 Partial configuration is fine. Command line options always override the config file settings.
 
+## Overriding distro detection
+
+If you're running e.g. an Ubuntu derivate based on 18.04 and ghcup is picking bindists that
+don't work well, you could do this in `config.yaml`:
+
+```yml
+platform-override:
+  arch: A_64
+  platform:
+    contents: Ubuntu
+    tag: Linux
+  version: '18.04'
+```
+
 ## Env variables
 
 This is the complete list of env variables that change GHCup behavior:
@@ -83,6 +97,10 @@ This is the complete list of env variables that change GHCup behavior:
 * `GHCUP_SKIP_UPDATE_CHECK`: Skip the (possibly annoying) update check when you run a command
 * `CC`/`LD` etc.: full environment is passed to the build system when compiling GHC via GHCup
 
+On windows, there's additionally:
+
+* `GHCUP_MSYS2`: Has to point to the root of an existing MSYS2 installation (when installed by GHCup, that's e.g. `C:\ghcup\msys64`). GHCup bootstrap takes care of this usually.
+
 ### XDG support
 
 To enable XDG style directories, set the environment variable `GHCUP_USE_XDG_DIRS` to anything.
@@ -133,7 +151,7 @@ url-source:
   OwnSource: "https://some-url/ghcup-0.0.6.yaml"
 ```
 
-See [config.yaml](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/data/config.yaml)
+See [config.yaml](https://github.com/haskell/ghcup-hs/blob/master/data/config.yaml)
 for more options.
 
 Alternatively you can do it via a cli switch:
@@ -184,8 +202,97 @@ url-source:
   - "https://raw.githubusercontent.com/haskell/ghcup-metadata/master/ghcup-prereleases-0.0.7.yaml"
 ```
 
+## Stack integration
+
+Stack manages GHC versions internally by default. In order to make it use ghcup installed
+GHC versions there are two strategies.
+
+### Strategy 1: System GHC (works on all stack versions)
+
+You can instruct stack to use "system" GHC versions (whatever is in PATH). To do so,
+run the following commands:
+
+```sh
+stack config set install-ghc false --global
+stack config set system-ghc  true  --global
+```
+
+### Strategy 2: Stack hooks (new, recommended)
+
+Since stack 2.9.1 you can customize the installation logic of GHC completely, see [https://docs.haskellstack.org/en/stable/yaml_configuration/#ghc-installation-customisation](https://docs.haskellstack.org/en/stable/yaml_configuration/#ghc-installation-customisation).
+
+We can use this to simply invoke ghcup whenever stack is trying to install/discover a GHC versions. This
+is done via placing a shell script at `~/.stack/hooks/ghc-install.sh` and making it executable.
+
+The ghcup bootstrap script asks you during installation whether you want to install this shell script. You can also
+install/update it manually like so:
+
+```sh
+mkdir -p ~/.stack/hooks/
+curl https://raw.githubusercontent.com/haskell/ghcup-hs/master/scripts/hooks/stack/ghc-install.sh \
+  > ~/.stack/hooks/ghc-install.sh
+chmod +x ~/.stack/hooks/ghc-install.sh
+# hooks are only run when 'system-ghc: false'
+stack config set system-ghc false --global
+```
+
+By default, when the hook fails for whatever reason, stack will fall back to its own installation logic. To disable
+this, run `stack config set install-ghc false --global`.
+
+### Windows
+
+On windows, you may find the following config options useful too:
+`skip-msys`, `extra-path`, `extra-include-dirs`, `extra-lib-dirs`.
+
+Also check out: [https://docs.haskellstack.org/en/stable/yaml_configuration](https://docs.haskellstack.org/en/stable/yaml_configuration)
+
 # More on installation
 
+## Customisation of the installation scripts
+
+The scripts offered to install GHCup are available here:
+
+* [bootstrap-haskell](https://github.com/haskell/ghcup-hs/blob/master/scripts/bootstrap/bootstrap-haskell#L7)
+  for Unix-like operating systems
+* [bootstrap-haskell.ps1](https://github.com/haskell/ghcup-hs/blob/master/scripts/bootstrap/bootstrap-haskell.ps1)
+  for Windows (PowerShell). This will, in turn, run the final bootstrap script
+  (by default, that for the Unix-like operating systems).
+
+The effect of the scripts can be customised by setting one or more
+`BOOTSTRAP_HASKELL_*` environment variables (as set out in the first script)
+and, in the case of Windows, by specifying parameters (as set out in the
+PowerShell script).
+
+For example, you can toggle:
+
+* non-interactive installation
+* a more verbose installation
+* whether to install only GHCup (and, on Windows, MSYS2)
+* not to trigger the upgrade of GHCup
+* whether to install the latest version of HLS
+* whether to install the latest version of Stack
+* whether to respect the XDG Base Directory Specification
+* whether to adjust (prepend) the PATH in `bashrc`
+* on Windows, whether to adjust MINGW paths in `cabal.config`
+
+You can also specify:
+
+* the GHC version to install
+* the Cabal version to install
+* which downloader to use (the default is `curl`)
+* the base URL for the download of the GHCup binary distribution
+
+On Windows, you can also use the parameters to:
+
+* toggle whether to overwrite a previous installation
+* specify the GHCup installation root directory
+* specify the Cabal root directory
+* specify the directory of an existing installation of MSYS2 (for example,
+  the one supplied by Stack)
+* specify the URL of the final bootstrap script
+* toggle whether to run the final bootstrap script via `bash` (instead of in a
+  new MSYS2 shell)
+
 ## Installing custom bindists
 
 There are a couple of good use cases to install custom bindists:
@@ -193,7 +300,8 @@ There are a couple of good use cases to install custom bindists:
 1. manually built bindists (e.g. with patches)
     - example: `ghcup install ghc -u 'file:///home/mearwald/tmp/ghc-eff-patches/ghc-8.10.2-x86_64-deb10-linux.tar.xz' 8.10.2-eff`
 2. GHC head CI bindists
-    - example: `ghcup install ghc -u 'https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27' head`
+    - example specifying a branch (`master`): `ghcup install ghc -u 'https://gitlab.haskell.org/ghc/ghc/-/jobs/artifacts/master/raw/ghc-x86_64-linux-fedora33-release.tar.xz?job=x86_64-linux-fedora33-release' head`
+    - example specifying a job id (`1129565`): `ghcup install ghc -u ' https://gitlab.haskell.org/api/v4/projects/1/jobs/1129565/artifacts/ghc-x86_64-linux-alpine3_12-validate+fully_static.tar.xz' mr7847`
 3. DWARF bindists
     - example: `ghcup install ghc -u 'https://downloads.haskell.org/~ghc/8.10.2/ghc-8.10.2-x86_64-deb10-linux-dwarf.tar.xz' 8.10.2-dwarf`
 
@@ -202,18 +310,78 @@ and produce the binaries `ghc-8.10.2-eff` and `ghc-head` respectively.
 GHCup always needs to know which version the bindist corresponds to (this is not automatically
 detected).
 
-## Compiling GHC from source
+## Compiling from source
+
+### GHC
 
 Compiling from source is supported for both source tarballs and arbitrary git refs. See `ghcup compile ghc --help`
 for a list of all available options.
 
 If you need to overwrite the existing `build.mk`, check the default files
-in [data/build_mk](https://gitlab.haskell.org/haskell/ghcup-hs/-/tree/master/data/build_mk), copy them somewhere, adjust them and
+in [data/build_mk](https://github.com/haskell/ghcup-hs/tree/master/data/build_mk), copy them somewhere, adjust them and
 pass `--config path/to/build.mk` to `ghcup compile ghc`.
 Common `build.mk` options are explained [here](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/using#build-configuration).
 
 Make sure your system meets all the [prerequisites](https://gitlab.haskell.org/ghc/ghc/-/wikis/building/preparation).
 
+### HLS
+
+There are 3 main ways to compile HLS from source.
+
+1. from hackage (should have up to date version bounds)
+    - `ghcup compile hls --version 1.7.0.0 --ghc 9.2.3`
+2. from git (allows to build latest sources and PRs)
+    - `ghcup compile hls --git-ref master --ghc 9.2.3`
+    - `ghcup compile hls --git-ref a32db0b --ghc 9.2.3`
+    - `ghcup compile hls --git-ref 1.7.0.0 --ghc 9.2.3`
+3. from source distribution that's packaged during release from the corresponding git sources
+    - `ghcup compile hls --source-dist 1.7.0.0 --ghc 9.2.3`
+
+All these use `cabal v2-install` under the hood, so all build components are cached.
+You can pass arbitrary arguments to cabal, e.g. set the index state like so:
+
+```sh
+ghcup compile hls --git-ref master --ghc 9.2.3 -- --index-state=2022-06-12T00:00:00Z --allow-newer
+```
+
+You can pass `--ghc <ver>` multiple times to install for many GHCs at once.
+
+When building from git sources, ghcup will auto-detect the HLS version that the git commit corresponds to
+from the `haskell-language-server.cabal` file. This version might not have been updated since the last release.
+If you want to avoid overwriting the existing installed HLS version, you can instruct ghcup to use `git describe`
+to set the HLS version instead:
+
+```sh
+ghcup compile hls --git-ref master --ghc 9.2.3 --git-describe-version
+```
+
+You can also set the version explicitly:
+
+```sh
+ghcup compile hls --git-ref master --ghc 9.2.3 --overwrite-version 1.7.0.0-p1
+```
+
+To instruct cabal to run `cabal update` before building, run `ghcup compile hls --version 1.7.0.0 --ghc 9.2.3 --cabal-update`
+
+As always, check `ghcup compile hls --help`.
+
+#### Updating HLS for a new GHC version
+
+First try to build from hackage with some tricks:
+
+```sh
+ghcup compile hls --version 1.7.0.0 --ghc 9.2.4 --cabal-update -- --allow-newer --index-state=2022-06-12T00:00:00Z
+```
+
+This augments the currently installed 1.7.0.0 official bindists in ghcup with new GHC versions support.
+
+If that fails (since `--allow-newer` is quite brutal), you can install from HLS master branch (which may contain new fixes) like so:
+```
+ghcup compile hls --git-ref master --git-describe-version --ghc 8.10.7 --ghc 9.2.4 --cabal-update
+```
+
+This however will create a new HLS version in ghcup, e.g. `1.7.0.0-105-gdc682ba1`, for both 8.10.7 and 9.2.4. If you want to switch back to the official bindists, run `ghcup set hls 1.7.0.0`.
+
 ### Cross support
 
 ghcup can compile and install a cross GHC for any target. However, this
@@ -241,41 +409,43 @@ You need to use the `--isolate` or `-i` flag followed by the directory path.
 
 Examples:
 
-1. install an isolated GHC version at location /home/user/isolated_dir/ghc/  
+1. install an isolated GHC version at location /home/user/isolated_dir/ghc/
     - `ghcup install ghc 8.10.5 --isolate /home/user/isolated_dir/ghc`
 
-2. isolated install Cabal at a location you desire  
+2. isolated install Cabal at a location you desire
     - `ghcup install cabal --isolate /home/username/my_isolated_dir/`
 
-3. do an isolated install with a custom bindist  
+3. do an isolated install with a custom bindist
-    - `ghcup install ghc --isolate /home/username/my_isolated_dir/ -u 'https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27' head`
+    - `ghcup install ghc --isolate /home/username/my_isolated_dir/ -u 'https://gitlab.haskell.org/ghc/ghc/-/jobs/artifacts/master/raw/ghc-x86_64-linux-fedora33-release.tar.xz?job=x86_64-linux-fedora33-release' head`
 
-4. isolated install HLS  
+4. isolated install HLS
     - `ghcup install hls --isolate /home/username/dir/hls/`
 
-5. you can even compile ghc to an isolated location.  
+5. you can even compile ghc to an isolated location.
-    - `ghcup compile ghc -j 4 -v 9.0.1 -b 8.10.5 -i /home/username/my/dir/ghc` 
+    - `ghcup compile ghc -j 4 -v 9.0.1 -b 8.10.5 -i /home/username/my/dir/ghc`
 
 ## Continuous integration
 
-On windows, ghcup can be installed automatically on a CI runner non-interactively like so:
+On Windows, GHCup can be installed automatically on a CI runner
+non-interactively, as below. The paramaters to the PowerShell script are
+specified positionally, after `-ArgumentList`:
 
 ```ps
-Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $false,$true,$true,$false,$false,$false,$false,"C:\"
+$ErrorActionPreference = 'Stop';Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;try { Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $false,$true,$true,$false,$false,$false,$false,"C:\" } catch { Write-Error $_ }
 ```
 
+`$ErrorActionPreference = 'Stop'` here acts like `set -e` and stops execution if ghcup installation fails.
+
 On linux/darwin/freebsd, run the following on your runner:
 
 ```sh
 curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 sh
 ```
 
-This will just install `ghcup` and on windows additionally `msys2`.
+This will just install `ghcup` and on Windows additionally MSYS2.
 
-For the full list of env variables and parameters to tweak the script behavior, see:
+See the installation scripts referred to above for the full list of environment
-
+variables and, in the case of Windows, parameters to tweak the script behavior.
-* [bootstrap-haskell for linux/darwin/freebsd](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell#L7)
-* [bootstrap-haskell.ps1 for windows](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1#L17)
 
 ### github workflows
 
@@ -310,7 +480,7 @@ gpg-setting: GPGLax # GPGStrict | GPGLax | GPGNone
 
 In `GPGStrict` mode, ghcup will fail if verification fails. In `GPGLax` mode it will just print a warning.
 You can also pass the mode via `ghcup --gpg <strict|lax|none>`.
-   
+
 # Tips and tricks
 
 ## ghcup run
@@ -324,3 +494,34 @@ ghcup run --ghc 8.10.7 --cabal latest --hls latest --stack latest --install -- c
 ```
 
 This will execute vscode with GHC set to 8.10.7 and all other tools to their latest version.
+
+# Troubleshooting
+
+## Script immediately exits on windows
+
+There are two possible reasons:
+
+1. your company blocks the script (some have a whitelist)... ask your administrator
+2. your Antivirus or Windows Defender interfere with the installation. Disable them temporarily.
+
+## C compiler cannot create executables
+
+### Darwin
+
+You need to update your XCode command line tools, e.g. [like this](https://stackoverflow.com/questions/34617452/how-to-update-xcode-from-command-line).
+
+## Certificate authority errors (curl)
+
+If your certificates are outdated or improperly configured, curl may be unable
+to download ghcup.
+
+There are two known workarounds:
+
+1. Tell curl to ignore certificate errors (dangerous): `curl -k https://raw.githubusercontent.com/haskell/ghcup-hs/master/scripts/bootstrap/bootstrap-haskell | GHCUP_CURL_OPTS="-k" sh`
+2. Try to use wget instead: `wget -O /dev/stdout https://raw.githubusercontent.com/haskell/ghcup-hs/master/scripts/bootstrap/bootstrap-haskell | BOOTSTRAP_HASKELL_DOWNLOADER=wget sh`
+
+On windows, you can disable curl like so:
+
+```pwsh
+Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;try { Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true,$false,$false,$false,$false,$false,$false,"","","","",$true } catch { Write-Error $_ }
+```

docs/index.md

@@ -13,10 +13,10 @@ hide:
   <h1>GHCup</h1>
 </section>
 
-<p class="ghcup-intro">GHCup is an installer for the general purpose language <a href="https://www.haskell.org">Haskell</a>.</p>
+<p class="ghcup-intro">GHCup is the main installer for the general purpose language <a href="https://www.haskell.org">Haskell</a>.</p>
 
 <div class="text-center main-buttons">
-<a href="install/" class="btn btn-primary" role="button">Getting Started</a>
+<a href="install/" class="btn btn-primary" role="button">Installation</a>
 <a href="steps/" class="btn btn-primary" role="button">First steps</a>
 <a href="guide/" class="btn btn-primary" role="button">User Guide</a>
 </div>
@@ -35,7 +35,7 @@ hide:
       <span>
       </span>
 	<div class="footer">
-		<a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://www.haskell.org/ghcup/install/#manual-install">I don't like curl | sh</a> <div class="show-all-platforms"><b>&nbsp;&middot;&nbsp;</b> <a class="show-all-platforms-button" href="#">Show all platforms</a></div></p>
+		<a href="https://github.com/haskell/ghcup-hs/blob/master/scripts/bootstrap/bootstrap-haskell" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://www.haskell.org/ghcup/install/#manual-install">I don't like curl | sh</a> <div class="show-all-platforms"><b>&nbsp;&middot;&nbsp;</b> <a class="show-all-platforms-button" href="#">Show all platforms</a></div></p>
 	</div>
     </div>
 
@@ -45,19 +45,19 @@ hide:
 
       <div class="command-button">
 	    <pre>
-          <span class="ghcup-command" id="ghcup-command-windows">Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true
+          <span class="ghcup-command" id="ghcup-command-windows">Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; try { Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true } catch { Write-Error $_ }
           </span>
         </pre>
         <button class="btn" onclick="copyToClipboardWin()" id="ghcup-windows-button"><i class="fa fa-copy"></i></button>
       </div>
 	<div class="footer">
-		<a href="https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://www.haskell.org/ghcup/install/#manual-install">I don't like curl | sh</a> <div class="show-all-platforms"><b>&nbsp;&middot;&nbsp;</b> <a class="show-all-platforms-button" href="#">Show all platforms</a></div></p>
+		<a href="https://github.com/haskell/ghcup-hs/blob/master/scripts/bootstrap/bootstrap-haskell.ps1" target="_blank">What does this do?</a> <b>&nbsp;&middot;&nbsp;</b> <a href="https://www.haskell.org/ghcup/install/#manual-install">I don't like curl | sh</a> <div class="show-all-platforms"><b>&nbsp;&middot;&nbsp;</b> <a class="show-all-platforms-button" href="#">Show all platforms</a></div></p>
 	</div>
     </div>
 </section>
 
 <p id="help" class="ghcup-help">
-  Need help? Ask on
+  Need help? Check the <a href="guide/#troubleshooting">Troubleshooting section</a> or ask on
   <span>
     <a href="https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup">
       <img src="irc.svg" alt="" />
@@ -77,7 +77,7 @@ hide:
   </span>
    or
    <span>
-     <a href="https://gitlab.haskell.org/haskell/ghcup-hs/issues">
+     <a href="https://github.com/haskell/ghcup-hs/issues">
        report a bug
        <img src="Octicons-bug.svg" alt="" />
      </a>

docs/install.md

@@ -1,10 +1,10 @@
-# Getting started
+# Installation
 
 GHCup makes it easy to install specific versions of GHC on GNU/Linux,
 macOS (aka Darwin), FreeBSD and Windows and can also bootstrap a fresh [Haskell developer environment](./install/#supported-tools) from scratch.
 It follows the UNIX philosophy of [do one thing and do it well](https://en.wikipedia.org/wiki/Unix_philosophy#Do_One_Thing_and_Do_It_Well). Similar in scope to [rustup](https://github.com/rust-lang-nursery/rustup.rs), [pyenv](https://github.com/pyenv/pyenv) and [jenv](http://www.jenv.be).
 
-## Installation
+## How to install
 
 The following commands will download the `ghcup` binary into `~/.ghcup/bin` (or `C:\ghcup\bin` on windows) and then
 run it to interactively install the [Haskell Toolchain](#supported-tools). These commands should be run as **non-root/non-admin
@@ -19,12 +19,12 @@ curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh
 For Windows, run this in a PowerShell session:
 
 ```psh
-Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072;Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true
+Set-ExecutionPolicy Bypass -Scope Process -Force;[System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; try { Invoke-Command -ScriptBlock ([ScriptBlock]::Create((Invoke-WebRequest https://www.haskell.org/ghcup/sh/bootstrap-haskell.ps1 -UseBasicParsing))) -ArgumentList $true } catch { Write-Error $_ }
 ```
 
 There's also a [youtube video](https://www.youtube.com/watch?v=bB4fmQiUYPw) explaining installation on windows.
 
-If you want to know what these scripts do, check out the [source code at the repository](https://gitlab.haskell.org/haskell/ghcup-hs/-/tree/master/scripts/bootstrap). Advanced users may want to perform a [manual installation](#manual-install) and GPG verify the binaries.
+If you want to know what these scripts do, check out the [source code at the repository](https://github.com/haskell/ghcup-hs/tree/master/scripts/bootstrap). Advanced users may want to perform a [manual installation](#manual-install) and GPG verify the binaries.
 
 ### Which versions get installed?
 
@@ -34,6 +34,53 @@ GHCup has two main channels for every tool: **recommended** and **latest**. By d
 
 Also see [tags and shortcuts](../guide/#tags-and-shortcuts) for more information.
 
+## System requirements
+
+### Linux Debian
+
+The following distro packages are required: `build-essential curl libffi-dev libffi6 libgmp-dev libgmp10 libncurses-dev libncurses5 libtinfo5`
+
+### Linux Ubuntu
+
+The following distro packages are required: `build-essential curl libffi-dev libffi6 libgmp-dev libgmp10 libncurses-dev libncurses5 libtinfo5`
+
+### Linux Fedora
+
+The following distro packages are required: `gcc gcc-c++ gmp gmp-devel make ncurses ncurses-compat-libs xz perl`
+
+### Linux Mageia
+
+The following distro packages are required: `curl gcc gcc-c++ gmp libffi-devel libffi7 libgmp-devel libgmp10 make libncurses-devel libncurses5 xz perl`
+
+### Linux CentOS
+
+The following distro packages are required: `gcc gcc-c++ gmp gmp-devel make ncurses ncurses-compat-libs xz perl`
+
+### Linux Alpine
+
+The following distro packages are required: `binutils-gold curl gcc g++ gmp-dev libc-dev libffi-dev make musl-dev ncurses-dev perl tar xz`
+
+### Linux VoidLinux
+
+The following distro packages are required: `gcc gmp curl coreutils xz ncurses make ncurses-libtinfo-libs perl tar`
+
+### Linux (generic)
+
+You need the following packages: curl g++ gcc gmp make ncurses realpath xz-utils. Consult your distro documentation on the exact names of those packages.
+
+### Darwin
+
+On OS X, in the course of running ghcup you will be given a dialog box to install the command line tools. Accept and the requirements will be installed for you. You will then need to run the command again.
+On Darwin M1 you might also need a working llvm installed (e.g. via brew) and have the toolchain exposed in PATH.
+
+### FreeBSD
+
+The following distro packages are required: `curl gcc gmp gmake ncurses perl5 libffi libiconv`
+
+### Windows
+
+On Windows, msys2 should already have been set up during the installation, so most users should just proceed. If you are installing manually, make sure to have a working mingw64 toolchain and shell.
+
 ## Next steps
 
 1. Follow the [First steps guide](../steps) on how to build a "Hello world" program, use `ghc`, run an interactive REPL and create a Haskell project
@@ -55,12 +102,17 @@ GHCup supports the following tools, which are also known as the **Haskell Toolch
 <table>
 <thead><tr><th>GHC Version</th><th>Tags</th></tr></thead>
 <tbody>
-<tr><td>9.2.3</td><td><span style="color:blue">latest</span>, base-4.16.2.0</td></tr>
+<tr><td>9.4.3</td><td><span style="color:blue">latest</span>, base-4.17.0.0</td></tr>
+<tr><td>9.4.2</td><td>base-4.17.0.0</td></tr>
+<tr><td>9.4.1</td><td>base-4.17.0.0</td></tr>
+<tr><td>9.2.5</td><td><span style="color:green">recommended</span>, base-4.16.4.0</td></tr>
+<tr><td>9.2.4</td><td>base-4.16.3.0</td></tr>
+<tr><td>9.2.3</td><td>base-4.16.2.0</td></tr>
 <tr><td>9.2.2</td><td>base-4.16.1.0</td></tr>
 <tr><td>9.2.1</td><td>base-4.16.0.0</td></tr>
 <tr><td>9.0.2</td><td>base-4.15.1.0</td></tr>
 <tr><td>9.0.1</td><td>base-4.15.0.0</td></tr>
-<tr><td>8.10.7</td><td><span style="color:green">recommended</span>, base-4.14.3.0</td></tr>
+<tr><td>8.10.7</td><td>base-4.14.3.0</td></tr>
 <tr><td>8.10.6</td><td>base-4.14.3.0</td></tr>
 <tr><td>8.10.5</td><td>base-4.14.2.0</td></tr>
 <tr><td>8.10.4</td><td>base-4.14.1.0</td></tr>
@@ -91,7 +143,8 @@ GHCup supports the following tools, which are also known as the **Haskell Toolch
 <table>
 <thead><tr><th>Cabal Version</th><th>Tags</th></tr></thead>
 <tbody>
-<tr><td>3.6.2.0</td><td><span style="color:blue">latest</span>, <span style="color:green">recommended</span></td></tr>
+<tr><td>3.8.1.0</td><td><span style="color:blue">latest</span></td></tr>
+<tr><td>3.6.2.0</td><td><span style="color:green">recommended</span></td></tr>
 <tr><td>3.6.0.0</td><td></td></tr>
 <tr><td>3.4.1.0</td><td></td></tr>
 <tr><td>3.4.0.0</td><td></td></tr>
@@ -106,7 +159,8 @@ GHCup supports the following tools, which are also known as the **Haskell Toolch
 <table>
 <thead><tr><th>HLS Version</th><th>Tags</th></tr></thead>
 <tbody>
-<tr><td>1.7.0.0</td><td><span style="color:blue">latest</span>, <span style="color:green">recommended</span></td></tr>
+<tr><td>1.8.0.0</td><td><span style="color:blue">latest</span>, <span style="color:green">recommended</span></td></tr>
+<tr><td>1.7.0.0</td><td></td></tr>
 <tr><td>1.6.1.0</td><td></td></tr>
 <tr><td>1.6.0.0</td><td></td></tr>
 <tr><td>1.5.1</td><td></td></tr>
@@ -123,7 +177,8 @@ GHCup supports the following tools, which are also known as the **Haskell Toolch
 <table>
 <thead><tr><th>Stack Version</th><th>Tags</th></tr></thead>
 <tbody>
-<tr><td>2.7.5</td><td><span style="color:blue">latest</span>, <span style="color:green">recommended</span></td></tr>
+<tr><td>2.9.1</td><td><span style="color:blue">latest</span>, <span style="color:green">recommended</span></td></tr>
+<tr><td>2.7.5</td><td></td></tr>
 <tr><td>2.7.3</td><td></td></tr>
 <tr><td>2.7.1</td><td></td></tr>
 <tr><td>2.5.1</td><td></td></tr>
@@ -183,7 +238,7 @@ HLS bindists are experimental.
 
 Lower availability of bindists. Stack and HLS binaries are experimental.
 
-## Manual install
+## Manual installation
 
 Download the binary for your platform at [https://downloads.haskell.org/~ghcup/](https://downloads.haskell.org/~ghcup/)
 and place it into your `PATH` anywhere.
@@ -200,10 +255,20 @@ export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$PATH"
 
 See [ghcup.vim](https://github.com/hasufell/ghcup.vim).
 
+## VSCode integration
+The developers of the Haskell Language Server offer an [extension](https://github.com/haskell/vscode-haskell) tightly integrated with the [Haskell Language Server](https://github.com/haskell/haskell-language-server). To get started:
+
+1. Install GHCup. During installation, opt in to install the Haskell Language Server (HLS).
+2. Install the extension (from VSCode: Ctrl + P and then `ext install haskell.haskell`).
+3. Make sure your project uses the GHC version installed from GHCup (otherwise HLS is likely to fail on launch):
+    - instructions for [stack](https://docs.haskellstack.org/en/stable/yaml_configuration/#system-ghc)
+
+On Linux, some users have reported an issue when VSCode is not launched from a terminal ("cannot find ghc version"). A solution is to [let HLS know about your GHCup on $PATH](https://github.com/haskell/vscode-haskell#stackcabalghc-can-not-be-found).
+
 ## Get help
 
 * [Libera IRC chat on #haskell-ghcup or #haskell](https://kiwiirc.com/nextclient/irc.libera.chat/?nick=Guest%7C?#haskell,#haskell-ghcup)
-* [GHCup issue tracker](https://gitlab.haskell.org/haskell/ghcup-hs/issues)
+* [GHCup issue tracker](https://github.com/haskell/ghcup-hs/issues/new)
 * [Matrix](https://app.element.io/#/room/#haskell-tooling:matrix.org)
 * [Discord](https://discord.gg/pKYf3zDQU7)
 

docs/steps.md

@@ -177,7 +177,7 @@ A more thorough introduction to GHCi can be found in the
 ### Using external packages in ghci
 
 By default, GHCi can only load and use packages that are
-[included with the GHC installation](https://downloads.haskell.org/ghc/latest/docs/html/users_guide/9.2.2-notes.html#included-libraries).
+[included with the GHC installation](https://downloads.haskell.org/ghc/9.4.2/docs/users_guide/9.4.2-notes.html#included-libraries).
 
 However, users of the [cabal-install](https://www.haskell.org/cabal) and
 [stack](http://haskellstack.org) build tools can download and load external packages
@@ -335,7 +335,7 @@ see the [Cabal user guide](https://cabal.readthedocs.io/en/stable/getting-starte
 
 To learn Haskell, try any of those:
 
-- A beginner friendly [4-lectures course](https://github.com/haskell-beginners-2022/course-plan) with exercises (by [Kowainik](https://kowainik.github.io/))
+- A beginner friendly [4-lectures course](https://github.com/haskell-beginners-2022/course-plan) with exercises (by [Dmitrii Kovanikov](https://kodimensional.dev/))
 - An in-depth university [CIS 194 Haskell course](https://www.cis.upenn.edu/~cis194/spring13/) including exercises (by [Brent Yorgey](https://byorgey.wordpress.com/))
 
 ## Projects to contribute to
@@ -343,7 +343,7 @@ To learn Haskell, try any of those:
 * [https://github.com/haskell/haskell-language-server](https://github.com/haskell/haskell-language-server)
 * [https://github.com/haskell/cabal](https://github.com/haskell/cabal)
 * [https://github.com/commercialhaskell/stack](https://github.com/commercialhaskell/stack)
-* [https://gitlab.haskell.org/haskell/ghcup-hs](https://gitlab.haskell.org/haskell/ghcup-hs)
+* [https://github.com/haskell/ghcup-hs](https://github.com/haskell/ghcup-hs)
 * [https://github.com/jgm/pandoc](https://github.com/jgm/pandoc)
 * [https://github.com/simonmichael/hledger](https://github.com/simonmichael/hledger)
 * [https://github.com/koalaman/shellcheck](https://github.com/koalaman/shellcheck)

ghcup.cabal

@@ -1,13 +1,13 @@
 cabal-version:      3.0
 name:               ghcup
-version:            0.1.18.0
+version:            0.1.18.1
 license:            LGPL-3.0-only
 license-file:       LICENSE
 copyright:          Julian Ospald 2020
 maintainer:         hasufell@posteo.de
 author:             Julian Ospald
-homepage:           https://gitlab.haskell.org/haskell/ghcup-hs
+homepage:           https://github.com/haskell/ghcup-hs
-bug-reports:        https://gitlab.haskell.org/haskell/ghcup-hs/issues
+bug-reports:        https://github.com/haskell/ghcup-hs/issues/
 synopsis:           ghc toolchain installer
 description:
   A rewrite of the shell script ghcup, for providing
@@ -21,13 +21,18 @@ extra-doc-files:
   README.md
 
 extra-source-files:
+  cbits/dirutils.c
+  cbits/dirutils.h
   data/build_mk/cross
   data/build_mk/default
-  test/golden/GHCupInfo.json
+  test/golden/unix/GHCupInfo.json
+  test/golden/windows/GHCupInfo.json
+  test/data/file
+  test/data/dir/.keep
 
 source-repository head
   type:     git
-  location: https://gitlab.haskell.org/haskell/ghcup-hs.git
+  location: https://github.com/haskell/ghcup-hs.git
 
 flag tui
   description:
@@ -69,6 +74,7 @@ library
     GHCup.Prelude.Process
     GHCup.Prelude.String.QQ
     GHCup.Prelude.Version.QQ
+    GHCup.Prompts
     GHCup.Requirements
     GHCup.Stack
     GHCup.Types
@@ -109,7 +115,7 @@ library
     , base16-bytestring     >=0.1.1.6    && <1.1
     , binary                ^>=0.8.6.0
     , bytestring            >=0.10       && <0.12
-    , Cabal                 ^>=3.6.2.0
+    , Cabal                 ^>=3.0.0.0 || ^>=3.2.0.0 || ^>=3.4.0.0 || ^>=3.6.0.0
     , case-insensitive      ^>=1.2.1.0
     , casing                ^>=0.1.4.1
     , containers            ^>=0.6
@@ -161,26 +167,31 @@ library
       , terminal-progress-bar  >=0.4.1
 
   if os(windows)
-    cpp-options:   -DIS_WINDOWS
+    cpp-options:     -DIS_WINDOWS
     other-modules:
       GHCup.Prelude.File.Windows
-      GHCup.Prelude.Process.Windows
       GHCup.Prelude.Windows
 
+    -- GHCup.OptParse.Run uses this
+    exposed-modules: GHCup.Prelude.Process.Windows
     build-depends:
       , bzlib
       , process  ^>=1.6.11.0
-      , Win32    ^>=2.10
+      , Win32    >=2.10
 
   else
     other-modules:
       GHCup.Prelude.File.Posix
       GHCup.Prelude.File.Posix.Foreign
-      GHCup.Prelude.File.Posix.Traversals
       GHCup.Prelude.Posix
       GHCup.Prelude.Process.Posix
+    exposed-modules:
+      GHCup.Prelude.File.Posix.Traversals
 
-    c-sources:     cbits/dirutils.c
+    include-dirs:     cbits
+    includes:         dirutils.h
+    install-includes: dirutils.h
+    c-sources:        cbits/dirutils.c
     build-depends:
       , bz2              >=0.5.0.5 && <1.1
       , terminal-size    ^>=0.3.2.1
@@ -234,8 +245,9 @@ executable ghcup
     , aeson-pretty          ^>=0.8.8
     , async                 ^>=2.2.3
     , base                  >=4.12     && <5
-    , bytestring            >=0.10       && <0.12
+    , bytestring            >=0.10     && <0.12
     , cabal-plan            ^>=0.7.2
+    , cabal-install-parsers >=0.4.5
     , containers            ^>=0.6
     , deepseq               ^>=1.4
     , directory             ^>=1.3.6.0
@@ -294,6 +306,7 @@ test-suite ghcup-test
     GHCup.ArbitraryTypes
     GHCup.Types.JSONSpec
     GHCup.Utils.FileSpec
+    GHCup.Prelude.File.Posix.TraversalsSpec
     Spec
 
   default-language:   Haskell2010
@@ -311,13 +324,13 @@ test-suite ghcup-test
 
   build-depends:
     , base                      >=4.12    && <5
-    , bytestring            >=0.10       && <0.12
+    , bytestring                >=0.10    && <0.12
     , containers                ^>=0.6
     , directory                 ^>=1.3.6.0
     , filepath                  ^>=1.4.2.1
-    , generic-arbitrary         >=0.1.0  && < 0.2.1 || >=0.2.2 && <0.3
+    , generic-arbitrary         >=0.1.0   && <0.2.1 || >=0.2.2 && <0.3
     , ghcup
-    , hspec                     >=2.7.10  && <2.10
+    , hspec                     >=2.7.10  && <2.11
     , hspec-golden-aeson        ^>=0.9
     , QuickCheck                ^>=2.14.1
     , quickcheck-arbitrary-adt  ^>=0.3.1.0
@@ -325,3 +338,9 @@ test-suite ghcup-test
     , text                      ^>=1.2.4.0
     , uri-bytestring            ^>=0.3.2.2
     , versions                  >=4.0.1   && <5.1
+
+  if os(windows)
+    cpp-options: -DIS_WINDOWS
+  else
+    build-depends:
+      , unix             ^>=2.7

lib/GHCup.hs

@@ -33,8 +33,8 @@ module GHCup (
 
 
 import           GHCup.Cabal
-import           GHCup.GHC
+import           GHCup.GHC             hiding ( GHCVer(..) )
-import           GHCup.HLS
+import           GHCup.HLS             hiding ( HLSVer(..) )
 import           GHCup.Stack
 import           GHCup.List
 import           GHCup.Download
@@ -73,6 +73,7 @@ import           Prelude                 hiding ( abs
 import           System.Environment
 import           System.FilePath
 import           System.IO.Error
+import           System.IO.Temp
 import           Text.Regex.Posix
 
 import qualified Data.Text                     as T
@@ -105,6 +106,7 @@ fetchToolBindist :: ( MonadFail m
                  -> Maybe FilePath
                  -> Excepts
                       '[ DigestError
+                       , ContentLengthError
                        , GPGError
                        , DownloadFailed
                        , NoDownload
@@ -133,6 +135,7 @@ rmTool :: ( MonadReader env m
           => ListResult
           -> Excepts '[NotInstalled, UninstallFailed] m ()
 rmTool ListResult {lVer, lTool, lCross} = do
+  logInfo $ "removing " <> T.pack (show lTool) <> " version " <> prettyVer lVer
   case lTool of
     GHC ->
       let ghcTargetVersion = GHCTargetVersion lCross lVer
@@ -206,9 +209,8 @@ rmGhcupDirs = do
       | isWindows = removeDirIfEmptyOrIsSymlink binDir
       | otherwise = do
           isXDGStyle <- liftIO useXDG
-          if not isXDGStyle
+          when (not isXDGStyle) $
-            then removeDirIfEmptyOrIsSymlink binDir
+            removeDirIfEmptyOrIsSymlink binDir
-            else pure ()
 
     reportRemainingFiles :: (MonadMask m, MonadIO m) => FilePath -> m [FilePath]
     reportRemainingFiles dir = do
@@ -287,6 +289,7 @@ upgradeGHCup :: ( MonadMask m
              -> Excepts
                   '[ CopyError
                    , DigestError
+                   , ContentLengthError
                    , GPGError
                    , GPGError
                    , DownloadFailed
@@ -307,7 +310,7 @@ upgradeGHCup mtarget force' fatal = do
   dli   <- liftE $ getDownloadInfo GHCup latestVer
   tmp   <- fromGHCupPath <$> lift withGHCupTmpDir
   let fn = "ghcup" <> exeExt
-  p <- liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) tmp (Just fn) False
+  p <- liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) (_dlCSize dli) tmp (Just fn) False
   let destDir = takeDirectory destFile
       destFile = fromMaybe (binDir </> fn) mtarget
   lift $ logDebug $ "mkdir -p " <> T.pack destDir
@@ -365,11 +368,12 @@ rmGhcup = do
   if isWindows
   then do
     -- since it doesn't seem possible to delete a running exe on windows
-    -- we move it to temp dir, to be deleted at next reboot
+    -- we move it to system temp dir, to be deleted at next reboot
-    tempFilepath <- mkGhcupTmpDir
+    tmp <- liftIO $ getCanonicalTemporaryDirectory >>= \t -> createTempDirectory t "ghcup"
+    logDebug $ "mv " <> T.pack ghcupFilepath <> " " <> T.pack (tmp </> "ghcup")
     hideError UnsupportedOperation $
               liftIO $ hideError NoSuchThing $
-              moveFile ghcupFilepath (fromGHCupPath tempFilepath </> "ghcup")
+              moveFile ghcupFilepath (tmp </> "ghcup")
   else
     -- delete it.
     hideError doesNotExistErrorType $ rmFile ghcupFilepath

lib/GHCup/Cabal.hs

@@ -81,6 +81,7 @@ installCabalBindist :: ( MonadMask m
                          '[ AlreadyInstalled
                           , CopyError
                           , DigestError
+                          , ContentLengthError
                           , GPGError
                           , DownloadFailed
                           , NoDownload
@@ -184,6 +185,7 @@ installCabalBin :: ( MonadMask m
                      '[ AlreadyInstalled
                       , CopyError
                       , DigestError
+                      , ContentLengthError
                       , GPGError
                       , DownloadFailed
                       , NoDownload

lib/GHCup/Download.hs

@@ -114,7 +114,7 @@ getDownloadsF :: ( FromJSONKey Tool
                  , MonadMask m
                  )
               => Excepts
-                   '[DigestError, GPGError, JSONError , DownloadFailed , FileDoesNotExistError]
+                   '[DigestError, ContentLengthError, GPGError, JSONError , DownloadFailed , FileDoesNotExistError]
                    m
                    GHCupInfo
 getDownloadsF = do
@@ -162,17 +162,21 @@ getBase :: ( MonadReader env m
            , MonadMask m
            )
         => URI
-        -> Excepts '[GPGError, DigestError, JSONError, FileDoesNotExistError] m GHCupInfo
+        -> Excepts '[DownloadFailed, GPGError, DigestError, ContentLengthError, JSONError, FileDoesNotExistError] m GHCupInfo
 getBase uri = do
-  Settings { noNetwork, downloader } <- lift getSettings
+  Settings { noNetwork, downloader, metaMode } <- lift getSettings
 
   -- try to download yaml... usually this writes it into cache dir,
   -- but in some cases not (e.g. when using file://), so we honour
   -- the return filepath, if any
   mYaml <- if noNetwork && view (uriSchemeL' % schemeBSL') uri /= "file" -- for file://, let it fall through
            then pure Nothing
-           else handleIO (\e -> lift (warnCache (displayException e) downloader) >> pure Nothing)
+           else handleIO (\e -> case metaMode of
-               . catchE @_ @_ @'[] (\e@(DownloadFailed _) -> lift (warnCache (prettyShow e) downloader) >> pure Nothing)
+                                  Strict -> throwIO e
+                                  Lax -> lift (warnCache (displayException e) downloader) >> pure Nothing)
+               . catchE @_ @_ @'[DownloadFailed] (\e@(DownloadFailed _) -> case metaMode of
+                   Strict -> throwE e
+                   Lax -> lift (warnCache (prettyShow e) downloader) >> pure Nothing)
                . fmap Just
                . smartDl
                $ uri
@@ -184,7 +188,7 @@ getBase uri = do
   liftE
     . onE_ (onError actualYaml)
     . lEM' @_ @_ @'[JSONError] (\(displayException -> e) -> JSONDecodeError $ unlines [e, "Consider removing " <> actualYaml <> " manually."])
-    . liftIO 
+    . liftIO
     . Y.decodeFileEither
     $ actualYaml
  where
@@ -229,6 +233,7 @@ getBase uri = do
           -> Excepts
                '[ DownloadFailed
                 , DigestError
+                , ContentLengthError
                 , GPGError
                 ]
                m1
@@ -242,7 +247,7 @@ getBase uri = do
     Settings { metaCache } <- lift getSettings
 
        -- for local files, let's short-circuit and ignore access time
-    if | scheme == "file" -> liftE $ download uri' Nothing Nothing (fromGHCupPath cacheDir) Nothing True
+    if | scheme == "file" -> liftE $ download uri' Nothing Nothing Nothing (fromGHCupPath cacheDir) Nothing True
        | e -> do
           accessTime <- fmap utcTimeToPOSIXSeconds $ liftIO $ getAccessTime json_file
           let sinceLastAccess = utcTimeToPOSIXSeconds currentTime - accessTime
@@ -258,7 +263,7 @@ getBase uri = do
    where
     dlWithMod modTime json_file = do
       let (dir, fn) = splitFileName json_file
-      f <- liftE $ download uri' (Just $ over pathL' (<> ".sig") uri') Nothing dir (Just fn) True
+      f <- liftE $ download uri' (Just $ over pathL' (<> ".sig") uri') Nothing Nothing dir (Just fn) True
       liftIO $ setModificationTime f modTime
       liftIO $ setAccessTime f modTime
       pure f
@@ -324,13 +329,14 @@ download :: ( MonadReader env m
          => URI
          -> Maybe URI         -- ^ URI for gpg sig
          -> Maybe T.Text      -- ^ expected hash
+         -> Maybe Integer     -- ^ expected content length
          -> FilePath          -- ^ destination dir (ignored for file:// scheme)
          -> Maybe FilePath    -- ^ optional filename
          -> Bool              -- ^ whether to read an write etags
-         -> Excepts '[DigestError , DownloadFailed, GPGError] m FilePath
+         -> Excepts '[DigestError, ContentLengthError, DownloadFailed, GPGError] m FilePath
-download uri gpgUri eDigest dest mfn etags
+download uri gpgUri eDigest eCSize dest mfn etags
-  | scheme == "https" = dl
+  | scheme == "https" = liftE dl
-  | scheme == "http"  = dl
+  | scheme == "http"  = liftE dl
   | scheme == "file"  = do
       let destFile' = T.unpack . decUTF8Safe $ view pathL' uri
       lift $ logDebug $ "using local file: " <> T.pack destFile'
@@ -351,7 +357,7 @@ download uri gpgUri eDigest dest mfn etags
     -- download
     flip onException
          (lift $ hideError doesNotExistErrorType $ recycleFile (tmpFile baseDestFile))
-     $ catchAllE @_ @'[GPGError, ProcessError, DownloadFailed, UnsupportedScheme, DigestError] @'[DigestError, DownloadFailed, GPGError]
+     $ catchAllE @_ @'[GPGError, ProcessError, DownloadFailed, UnsupportedScheme, DigestError, ContentLengthError] @'[DigestError, ContentLengthError, DownloadFailed, GPGError]
           (\e' -> do
             lift $ hideError doesNotExistErrorType $ recycleFile (tmpFile baseDestFile)
             case e' of
@@ -401,19 +407,37 @@ download uri gpgUri eDigest dest mfn etags
                         CapturedProcess { _stdErr } -> lift $ logDebug $ decUTF8Safe' _stdErr
                 _ -> pure ()
 
+              forM_ eCSize  (liftE . flip checkCSize  baseDestFile)
               forM_ eDigest (liftE . flip checkDigest baseDestFile)
     pure baseDestFile
 
-  curlDL :: (MonadCatch m, MonadMask m, MonadIO m) => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+  curlDL :: ( MonadCatch m
+            , MonadMask m
+            , MonadIO m
+            )
+         => [String]
+         -> FilePath
+         -> URI
+         -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
   curlDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
     let destFileTemp = tmpFile destFile
     flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
       liftE $ lEM @_ @'[ProcessError] $ exec "curl"
-        (o' ++ ["-fL", "-o", destFileTemp, T.unpack uri']) Nothing Nothing
+        (o' ++ ["-fL", "-o", destFileTemp, T.unpack uri']
+            ++ maybe [] (\s -> ["--max-filesize", show s]) eCSize
+        ) Nothing Nothing
       liftIO $ renameFile destFileTemp destFile
 
-  curlEtagsDL :: (MonadReader env m, HasLog env, MonadCatch m, MonadMask m, MonadIO m)
+  curlEtagsDL :: ( MonadReader env m
-              => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+                 , HasLog env
+                 , MonadCatch m
+                 , MonadMask m
+                 , MonadIO m
+                 )
+              => [String]
+              -> FilePath
+              -> URI
+              -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
   curlEtagsDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
     let destFileTemp = tmpFile destFile
     dh <- liftIO $ emptySystemTempFile "curl-header"
@@ -440,7 +464,14 @@ download uri gpgUri eDigest dest mfn etags
 
         lift $ writeEtags destFile (parseEtags headers)
 
-  wgetDL :: (MonadCatch m, MonadMask m, MonadIO m) => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+  wgetDL :: ( MonadCatch m
+            , MonadMask m
+            , MonadIO m
+            )
+         => [String]
+         -> FilePath
+         -> URI
+         -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
   wgetDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
     let destFileTemp = tmpFile destFile
     flip finally (try @_ @SomeException $ rmFile destFileTemp) $ do
@@ -449,7 +480,12 @@ download uri gpgUri eDigest dest mfn etags
       liftIO $ renameFile destFileTemp destFile
 
 
-  wgetEtagsDL :: (MonadReader env m, HasLog env, MonadCatch m, MonadMask m, MonadIO m)
+  wgetEtagsDL :: ( MonadReader env m
+                 , HasLog env
+                 , MonadCatch m
+                 , MonadMask m
+                 , MonadIO m
+                 )
               => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
   wgetEtagsDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
     let destFileTemp = tmpFile destFile
@@ -471,7 +507,10 @@ download uri gpgUri eDigest dest mfn etags
           | otherwise -> throwE (NonZeroExit i' "wget" opts)
 
 #if defined(INTERNAL_DOWNLOADER)
-  internalDL :: (MonadCatch m, MonadMask m, MonadIO m)
+  internalDL :: ( MonadCatch m
+                , MonadMask m
+                , MonadIO m
+                )
              => FilePath -> URI -> Excepts '[DownloadFailed, UnsupportedScheme] m ()
   internalDL destFile uri' = do
     let destFileTemp = tmpFile destFile
@@ -481,11 +520,16 @@ download uri gpgUri eDigest dest mfn etags
                  @'[DownloadFailed]
             (\e@(HTTPNotModified _) ->
               throwE @_ @'[DownloadFailed] (DownloadFailed (toVariantAt @0 e :: V '[HTTPNotModified])))
-        $ downloadToFile https host fullPath port destFileTemp mempty
+        $ downloadToFile https host fullPath port destFileTemp mempty eCSize
       liftIO $ renameFile destFileTemp destFile
 
 
-  internalEtagsDL :: (MonadReader env m, HasLog env, MonadCatch m, MonadMask m, MonadIO m)
+  internalEtagsDL :: ( MonadReader env m
+                     , HasLog env
+                     , MonadCatch m
+                     , MonadMask m
+                     , MonadIO m
+                     )
                   => FilePath -> URI -> Excepts '[DownloadFailed, UnsupportedScheme] m ()
   internalEtagsDL destFile uri' = do
     let destFileTemp = tmpFile destFile
@@ -497,7 +541,7 @@ download uri gpgUri eDigest dest mfn etags
       liftE
         $ catchE @HTTPNotModified @'[DownloadFailed] @'[] (\(HTTPNotModified etag) -> lift $ writeEtags destFile (pure $ Just etag))
         $ do
-          r <- downloadToFile https host fullPath port destFileTemp addHeaders
+          r <- downloadToFile https host fullPath port destFileTemp addHeaders eCSize
           liftIO $ renameFile destFileTemp destFile
           lift $ writeEtags destFile (pure $ decUTF8Safe <$> getHeader r "etag")
 #endif
@@ -505,7 +549,7 @@ download uri gpgUri eDigest dest mfn etags
 
   -- Manage to find a file we can write the body into.
   getDestFile :: Monad m => URI -> Maybe FilePath -> Excepts '[NoUrlBase] m FilePath
-  getDestFile uri' mfn' = 
+  getDestFile uri' mfn' =
     let path = view pathL' uri'
     in case mfn' of
         Just fn -> pure (dest </> fn)
@@ -574,14 +618,14 @@ downloadCached :: ( MonadReader env m
                   )
                => DownloadInfo
                -> Maybe FilePath  -- ^ optional filename
-               -> Excepts '[DigestError , DownloadFailed, GPGError] m FilePath
+               -> Excepts '[DigestError, ContentLengthError, DownloadFailed, GPGError] m FilePath
 downloadCached dli mfn = do
   Settings{ cache } <- lift getSettings
   case cache of
     True -> downloadCached' dli mfn Nothing
     False -> do
       tmp <- lift withGHCupTmpDir
-      liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) (fromGHCupPath tmp) mfn False
+      liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) (_dlCSize dli) (fromGHCupPath tmp) mfn False
 
 
 downloadCached' :: ( MonadReader env m
@@ -596,7 +640,7 @@ downloadCached' :: ( MonadReader env m
                 => DownloadInfo
                 -> Maybe FilePath  -- ^ optional filename
                 -> Maybe FilePath  -- ^ optional destination dir (default: cacheDir)
-                -> Excepts '[DigestError , DownloadFailed, GPGError] m FilePath
+                -> Excepts '[DigestError, ContentLengthError, DownloadFailed, GPGError] m FilePath
 downloadCached' dli mfn mDestDir = do
   Dirs { cacheDir } <- lift getDirs
   let destDir = fromMaybe (fromGHCupPath cacheDir) mDestDir
@@ -605,9 +649,10 @@ downloadCached' dli mfn mDestDir = do
   fileExists <- liftIO $ doesFileExist cachfile
   if
     | fileExists -> do
+      forM_ (view dlCSize dli) $ \s -> liftE $ checkCSize s cachfile
       liftE $ checkDigest (view dlHash dli) cachfile
       pure cachfile
-    | otherwise -> liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) destDir mfn False
+    | otherwise -> liftE $ download (_dlUri dli) Nothing (Just (_dlHash dli)) (_dlCSize dli) destDir mfn False
 
 
 
@@ -638,6 +683,25 @@ checkDigest eDigest file = do
     cDigest <- throwEither . E.decodeUtf8' . B16.encode . SHA256.hashlazy $ c
     when ((cDigest /= eDigest) && verify) $ throwE (DigestError file cDigest eDigest)
 
+checkCSize :: ( MonadReader env m
+              , HasDirs env
+              , HasSettings env
+              , MonadIO m
+              , MonadThrow m
+              , HasLog env
+              )
+           => Integer
+           -> FilePath
+           -> Excepts '[ContentLengthError] m ()
+checkCSize eCSize file = do
+  Settings{ noVerify } <- lift getSettings
+  let verify = not noVerify
+  when verify $ do
+    let p' = takeFileName file
+    lift $ logInfo $ "verifying content length of: " <> T.pack p'
+    cSize <- liftIO $ getFileSize file
+    when ((eCSize /= cSize) && verify) $ throwE (ContentLengthError (Just file) (Just cSize) eCSize)
+
 
 -- | Get additional curl args from env. This is an undocumented option.
 getCurlOpts :: IO [String]

lib/GHCup/Download/IOStreams.hs

@@ -17,14 +17,12 @@ import           Control.Exception.Safe
 import           Control.Monad
 import           Control.Monad.Reader
 import           Data.ByteString                ( ByteString )
-import           Data.ByteString.Builder
 import           Data.CaseInsensitive           ( CI, original, mk )
 import           Data.IORef
 import           Data.Maybe
 import           Data.Text.Read
 import           Haskus.Utils.Variant.Excepts
 import           Network.Http.Client     hiding ( URL )
-import           Optics
 import           Prelude                 hiding ( abs
                                                 , readFile
                                                 , writeFile
@@ -33,7 +31,6 @@ import           System.ProgressBar
 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 System.IO.Streams             as Streams
 
@@ -46,27 +43,6 @@ import qualified System.IO.Streams             as Streams
     ----------------------------
 
 
--- | Load the result of this download into memory at once.
-downloadBS' :: MonadIO m
-            => Bool             -- ^ https?
-            -> ByteString       -- ^ host (e.g. "www.example.com")
-            -> ByteString       -- ^ path (e.g. "/my/file") including query
-            -> Maybe Int        -- ^ optional port (e.g. 3000)
-            -> Excepts
-                 '[ HTTPStatusError
-                  , URIParseError
-                  , UnsupportedScheme
-                  , NoLocationHeader
-                  , TooManyRedirs
-                  ]
-                 m
-                 L.ByteString
-downloadBS' https host path port = do
-  bref <- liftIO $ newIORef (mempty :: Builder)
-  let stepper bs = modifyIORef bref (<> byteString bs)
-  void $ downloadInternal False https host path port stepper (pure ()) mempty
-  liftIO (readIORef bref <&> toLazyByteString)
-
 
 downloadToFile :: (MonadMask m, MonadIO m)
                => Bool             -- ^ https?
@@ -75,8 +51,9 @@ downloadToFile :: (MonadMask m, MonadIO m)
                -> Maybe Int        -- ^ optional port (e.g. 3000)
                -> FilePath         -- ^ destination file to create and write to
                -> M.Map (CI ByteString) ByteString -- ^ additional headers
+               -> Maybe Integer    -- ^ expected content length
                -> Excepts '[DownloadFailed, HTTPNotModified] m Response
-downloadToFile https host fullPath port destFile addHeaders = do
+downloadToFile https host fullPath port destFile addHeaders eCSize = do
   let stepper = BS.appendFile destFile
       setup = BS.writeFile destFile mempty
   catchAllE (\case
@@ -84,7 +61,7 @@ downloadToFile https host fullPath port destFile addHeaders = do
                 | i == 304
                 , Just e <- M.lookup (mk "etag") headers -> throwE $ HTTPNotModified (decUTF8Safe e)
               v -> throwE $ DownloadFailed v
-            ) $ downloadInternal True https host fullPath port stepper setup addHeaders
+            ) $ downloadInternal True https host fullPath port stepper setup addHeaders eCSize
 
 
 downloadInternal :: MonadIO m
@@ -96,19 +73,21 @@ downloadInternal :: MonadIO m
                  -> (ByteString -> IO a)   -- ^ the consuming step function
                  -> IO a                   -- ^ setup action
                  -> M.Map (CI ByteString) ByteString -- ^ additional headers
+                 -> Maybe Integer
                  -> Excepts
                       '[ HTTPStatusError
                        , URIParseError
                        , UnsupportedScheme
                        , NoLocationHeader
                        , TooManyRedirs
+                       , ContentLengthError
                        ]
                       m
                       Response
 downloadInternal = go (5 :: Int)
 
  where
-  go redirs progressBar https host path port consumer setup addHeaders = do
+  go redirs progressBar https host path port consumer setup addHeaders eCSize = do
     r <- liftIO $ withConnection' https host port action
     veitherToExcepts r >>= \case
       Right r' ->
@@ -138,25 +117,39 @@ downloadInternal = go (5 :: Int)
     followRedirectURL bs = case parseURI strictURIParserOptions bs of
       Right uri' -> do
         (https', host', fullPath', port') <- liftE $ uriToQuadruple uri'
-        go (redirs - 1) progressBar https' host' fullPath' port' consumer setup addHeaders
+        go (redirs - 1) progressBar https' host' fullPath' port' consumer setup addHeaders eCSize
       Left e -> throwE e
 
     downloadStream r i' = do
       void setup
       let size = case getHeader r "Content-Length" of
             Just x' -> case decimal $ decUTF8Safe x' of
-              Left  _       -> 0
+              Left  _       -> Nothing
-              Right (r', _) -> r'
+              Right (r', _) -> Just r'
-            Nothing -> 0
+            Nothing -> Nothing
 
-      (mpb :: Maybe (ProgressBar ())) <- if progressBar
+      forM_ size $ \s -> forM_ eCSize $ \es -> when (es /= s) $ throwIO (ContentLengthError Nothing (Just s) es)
-        then Just <$> newProgressBar defStyle 10 (Progress 0 size ())
+      let size' = eCSize <|> size
-        else pure Nothing
+
+      (mpb :: Maybe (ProgressBar ())) <- case (progressBar, size') of
+        (True, Just size'') -> Just <$> newProgressBar defStyle 10 (Progress 0 (fromInteger size'') ())
+        _ -> pure Nothing
+
+      ior <- liftIO $ newIORef 0
 
       outStream <- liftIO $ Streams.makeOutputStream
         (\case
           Just bs -> do
-            forM_ mpb $ \pb -> incProgress pb (BS.length bs)
+            let len = BS.length bs
+            forM_ mpb $ \pb -> incProgress pb len
+
+            -- check we don't exceed size
+            forM_ size' $ \s -> do
+              cs <- readIORef ior
+              when ((cs + toInteger len) > s) $ throwIO (ContentLengthError Nothing (Just (cs + toInteger len)) s)
+
+            modifyIORef ior (+ toInteger len)
+
             void $ consumer bs
           Nothing -> pure ()
         )

lib/GHCup/Errors.hs

@@ -137,8 +137,8 @@ data AlreadyInstalled = AlreadyInstalled Tool Version
 
 instance Pretty AlreadyInstalled where
   pPrint (AlreadyInstalled tool ver') =
-    pPrint tool <+> text "-" <+> pPrint ver' <+> text "is already installed;"
+    (pPrint tool <> text "-" <> pPrint ver') <+> text "is already installed;"
-    <+> text "if you really want to reinstall it, you may want to run 'ghcup install cabal --force" <+> (pPrint ver' <> text "'")
+    <+> text "if you really want to reinstall it, you may want to run 'ghcup install" <+> pPrint tool <+> text "--force" <+> (pPrint ver' <> text "'")
 
 
 -- | The Directory is supposed to be empty, but wasn't.
@@ -219,6 +219,29 @@ instance Pretty DigestError where
       <+> text (T.unpack expectedDigest) <+> text "but got" <+> pPrint currentDigest <+> text
       "\nConsider removing the file in case it's cached and try again."
 
+-- | File content length verification failed.
+data ContentLengthError = ContentLengthError (Maybe FilePath) (Maybe Integer) Integer
+  deriving Show
+
+instance Pretty ContentLengthError where
+  pPrint (ContentLengthError Nothing Nothing expectedSize) =
+    text "Content length exceeded expected size:"
+      <+> text (show expectedSize)
+      <+> text "\nConsider removing the file in case it's cached and try again."
+  pPrint (ContentLengthError Nothing (Just currentSize) expectedSize) =
+    text "Content length error. Expected"
+      <+> text (show expectedSize) <+> text "but got" <+> pPrint currentSize <+> text
+      "\nConsider removing the file in case it's cached and try again."
+  pPrint (ContentLengthError (Just fp) (Just currentSize) expectedSize) =
+    text "Content length error for" <+> text (fp <> ": expected")
+      <+> text (show expectedSize) <+> text "but got" <+> pPrint currentSize <+> text
+      "\nConsider removing the file in case it's cached and try again."
+  pPrint (ContentLengthError (Just fp) Nothing expectedSize) =
+    text "Content length error for" <+> text (fp <> ": expected")
+      <+> text (show expectedSize) <+> text "\nConsider removing the file in case it's cached and try again."
+
+instance Exception ContentLengthError
+
 -- | File digest verification failed.
 data GPGError = forall xs . (ToVariantMaybe DownloadFailed xs, PopVariant DownloadFailed xs, Show (V xs), Pretty (V xs)) => GPGError (V xs)
 

lib/GHCup/GHC.hs

@@ -80,6 +80,12 @@ import qualified Data.Text.Encoding            as E
 import qualified Text.Megaparsec               as MP
 
 
+data GHCVer v = SourceDist v
+              | GitDist GitBranch
+              | RemoteDist URI
+
+
+
     ---------------------
     --[ Tool fetching ]--
     ---------------------
@@ -103,6 +109,7 @@ fetchGHCSrc :: ( MonadFail m
             -> Maybe FilePath
             -> Excepts
                  '[ DigestError
+                  , ContentLengthError
                   , GPGError
                   , DownloadFailed
                   , NoDownload
@@ -146,6 +153,7 @@ installGHCBindist :: ( MonadFail m
                        '[ AlreadyInstalled
                         , BuildFailed
                         , DigestError
+                        , ContentLengthError
                         , GPGError
                         , DownloadFailed
                         , NoDownload
@@ -295,8 +303,9 @@ installUnpackedGHC path inst ver forceInstall addConfArgs
   | otherwise = do
       PlatformRequest {..} <- lift getPlatformReq
 
-      let alpineArgs
+      let ldOverride
-           | ver >= [vver|8.2.2|], Linux Alpine <- _rPlatform
+           | ver >= [vver|8.2.2|]
+           , _rPlatform `elem` [Linux Alpine, Darwin]
            = ["--disable-ld-override"]
            | otherwise
            = []
@@ -304,7 +313,7 @@ installUnpackedGHC path inst ver forceInstall addConfArgs
       lift $ logInfo "Installing GHC (this may take a while)"
       lEM $ execLogged "sh"
                        ("./configure" : ("--prefix=" <> fromInstallDir inst)
-                        : (alpineArgs <> (T.unpack <$> addConfArgs))
+                        : (ldOverride <> (T.unpack <$> addConfArgs))
                        )
                        (Just $ fromGHCupPath path)
                        "ghc-configure"
@@ -350,6 +359,7 @@ installGHCBin :: ( MonadFail m
                    '[ AlreadyInstalled
                     , BuildFailed
                     , DigestError
+                    , ContentLengthError
                     , GPGError
                     , DownloadFailed
                     , NoDownload
@@ -566,8 +576,11 @@ rmGHCVer ver = do
       lift $ recycleFile f
       when (not (null survivors)) $ throwE $ UninstallFailed dir survivors
     Nothing -> do
-      lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack dir
+      isDir <- liftIO $ doesDirectoryExist dir
-      lift $ recyclePathForcibly dir'
+      isSyml <- liftIO $ handleIO (\_ -> pure False) $ pathIsSymbolicLink dir
+      when (isDir && not isSyml) $ do
+        lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack dir
+        recyclePathForcibly dir'
 
   v' <-
     handle
@@ -604,7 +617,7 @@ compileGHC :: ( MonadMask m
               , MonadUnliftIO m
               , MonadFail m
               )
-           => Either GHCTargetVersion GitBranch          -- ^ version to install
+           => GHCVer GHCTargetVersion
            -> Maybe Version            -- ^ overwrite version
            -> Either Version FilePath  -- ^ version to bootstrap with
            -> Maybe Int                -- ^ jobs
@@ -618,6 +631,7 @@ compileGHC :: ( MonadMask m
                 '[ AlreadyInstalled
                  , BuildFailed
                  , DigestError
+                 , ContentLengthError
                  , GPGError
                  , DownloadFailed
                  , GHCupSetError
@@ -647,7 +661,7 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
 
     (workdir, tmpUnpack, tver) <- case targetGhc of
       -- unpack from version tarball
-      Left tver -> do
+      SourceDist tver -> do
         lift $ logDebug $ "Requested to compile: " <> tVerToText tver <> " with " <> either prettyVer T.pack bstrap
 
         -- download source tarball
@@ -666,13 +680,37 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
                          (view dlSubdir dlInfo)
         liftE $ applyAnyPatch patches (fromGHCupPath workdir)
 
-        pure (workdir, tmpUnpack, tver)
+        pure (workdir, tmpUnpack, Just tver)
+
+      RemoteDist uri -> do
+        lift $ logDebug $ "Requested to compile (from uri): " <> T.pack (show uri)
+
+        -- download source tarball
+        tmpDownload <- lift withGHCupTmpDir
+        tmpUnpack <- lift mkGhcupTmpDir
+        tar <- liftE $ download uri Nothing Nothing Nothing (fromGHCupPath tmpDownload) Nothing False
+        (bf, tver) <- liftE $ cleanUpOnError @'[UnknownArchive, ArchiveResult, ProcessError] tmpUnpack $ do
+          liftE $ unpackToDir (fromGHCupPath tmpUnpack) tar
+          let regex = [s|^(.*/)*boot$|] :: B.ByteString
+          [bootFile] <- liftIO $ findFilesDeep
+            tmpUnpack
+            (makeRegexOpts compExtended
+                           execBlank
+                           regex
+            )
+          tver <- liftE $ catchAllE @_ @'[ProcessError, ParseError] @'[] (\_ -> pure Nothing) $ fmap Just $ getGHCVer
+            (appendGHCupPath tmpUnpack (takeDirectory bootFile))
+          pure (bootFile, tver)
+
+        let workdir = appendGHCupPath tmpUnpack (takeDirectory bf)
+
+        pure (workdir, tmpUnpack, mkTVer <$> tver)
 
       -- clone from git
-      Right GitBranch{..} -> do
+      GitDist GitBranch{..} -> do
         tmpUnpack <- lift mkGhcupTmpDir
         let git args = execLogged "git" ("--no-pager":args) (Just $ fromGHCupPath tmpUnpack) "git" Nothing
-        tver <- reThrowAll @_ @'[PatchFailed, ProcessError, NotFoundInPATH, DigestError, DownloadFailed, GPGError] DownloadFailed $ do
+        tver <- reThrowAll @_ @'[PatchFailed, ProcessError, NotFoundInPATH, DigestError, ContentLengthError, DownloadFailed, GPGError] DownloadFailed $ do
           let rep = fromMaybe "https://gitlab.haskell.org/ghc/ghc.git" repo
           lift $ logInfo $ "Fetching git repo " <> T.pack rep <> " at ref " <> T.pack ref <> " (this may take a while)"
           lEM $ git [ "init" ]
@@ -681,33 +719,54 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
                     , "origin"
                     , fromString rep ]
 
-          let fetch_args =
+          -- figure out if we can do a shallow clone
-                    [ "fetch"
+          remoteBranches <- catchE @ProcessError @'[PatchFailed, ProcessError, NotFoundInPATH, DigestError, ContentLengthError, DownloadFailed, GPGError] @'[PatchFailed, NotFoundInPATH, DigestError, DownloadFailed, GPGError] (\(_ :: ProcessError) -> pure [])
-                    , "--depth"
+              $ fmap processBranches $ gitOut ["ls-remote", "--heads", "origin"] (fromGHCupPath tmpUnpack)
-                    , "1"
+          let shallow_clone
-                    , "--quiet"
+                | isCommitHash ref                     = True
-                    , "origin"
+                | fromString ref `elem` remoteBranches = True
-                    , fromString ref ]
+                | otherwise                            = False
+          lift $ logDebug $ "Shallow clone: " <> T.pack (show shallow_clone)
+
+          -- fetch
+          let fetch_args
+                | shallow_clone = ["fetch", "--depth", "1", "--quiet", "origin", fromString ref]
+                | otherwise     = ["fetch", "--tags",       "--quiet", "origin"                ]
           lEM $ git fetch_args
 
-          lEM $ git [ "checkout", "FETCH_HEAD" ]
+          -- initial checkout
+          lEM $ git [ "checkout", fromString ref ]
+
+          -- gather some info
+          git_describe <- if shallow_clone
+                          then pure Nothing
+                          else fmap Just $ liftE $ gitOut ["describe", "--tags"] (fromGHCupPath tmpUnpack)
+          chash <- liftE $ gitOut ["rev-parse", "HEAD" ] (fromGHCupPath tmpUnpack)
+
+          -- clone submodules
           lEM $ git [ "submodule", "update", "--init", "--depth", "1" ]
+
+          -- apply patches
           liftE $ applyAnyPatch patches (fromGHCupPath tmpUnpack)
-          lEM $ execWithGhcEnv "python3" ["./boot"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
-          lEM $ execWithGhcEnv "sh" ["./configure"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
-          CapturedProcess {..} <- lift $ makeOut
-            ["show!", "--quiet", "VALUE=ProjectVersion" ] (Just $ fromGHCupPath tmpUnpack)
-          case _exitCode of
-            ExitSuccess -> throwEither . MP.parse ghcProjectVersion "" . decUTF8Safe' $ _stdOut
-            ExitFailure c -> fail ("Could not figure out GHC project version. Exit code was: " <> show c <> ". Error was: " <> T.unpack (decUTF8Safe' _stdErr))
 
-        liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
+          -- bootstrap
-        lift $ logInfo $ "Git version " <> T.pack ref <> " corresponds to GHC version " <> prettyVer tver
+          tver <- liftE $ catchAllE @_ @'[ProcessError, ParseError] @'[] (\_ -> pure Nothing) $ fmap Just $ getGHCVer
+            tmpUnpack
+          liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
+          lift $ logInfo $ "Examining git ref " <> T.pack ref <> "\n  " <>
+                           "GHC version (from Makefile): " <> T.pack (show (prettyVer <$> tver)) <>
+                           (if not shallow_clone then "\n  " <> "'git describe' output: " <> fromJust git_describe else mempty) <>
+                           (if isCommitHash ref then mempty else "\n  " <> "commit hash: " <> chash)
+          liftIO $ threadDelay 5000000 -- give the user a sec to intervene
 
-        pure (tmpUnpack, tmpUnpack, GHCTargetVersion Nothing tver)
+          pure tver
+
+        pure (tmpUnpack, tmpUnpack, mkTVer <$> tver)
     -- the version that's installed may differ from the
     -- compiled version, so the user can overwrite it
-    let installVer = maybe tver (\ov' -> tver { _tvVersion = ov' }) ov
+    installVer <- if | Just ov'   <- ov   -> pure (mkTVer ov')
+                     | Just tver' <- tver -> pure tver'
+                     | otherwise          -> fail "Newer GHCs don't support discovering the version in git. Complain to GHC devs: https://gitlab.haskell.org/ghc/ghc/-/issues/22322"
 
     alreadyInstalled <- lift $ ghcInstalled installVer
     alreadySet <- fmap (== Just installVer) $ lift $ ghcSet (_tvTarget installVer)
@@ -730,8 +789,10 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
       tmpUnpack
       (do
         b <- if hadrian
-             then compileHadrianBindist tver (fromGHCupPath workdir) ghcdir
+             -- prefer 'tver', because the real version carries out compatibility checks
-             else compileMakeBindist tver (fromGHCupPath workdir) ghcdir
+             -- we don't want the user to do funny things with it
+             then compileHadrianBindist (fromMaybe installVer tver) (fromGHCupPath workdir) ghcdir
+             else compileMakeBindist (fromMaybe installVer tver) (fromGHCupPath workdir) ghcdir
         bmk <- liftIO $ handleIO (\_ -> pure "") $ B.readFile (build_mk $ fromGHCupPath workdir)
         pure (b, bmk)
       )
@@ -767,11 +828,29 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
     pure installVer
 
  where
+  getGHCVer :: ( MonadReader env m
+               , HasSettings env
+               , HasDirs env
+               , HasLog env
+               , MonadIO m
+               , MonadThrow m
+               )
+            => GHCupPath
+            -> Excepts '[ProcessError, ParseError] m Version
+  getGHCVer tmpUnpack = do
+    lEM $ execWithGhcEnv "python3" ["./boot"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
+    lEM $ execWithGhcEnv "sh" ["./configure"] (Just $ fromGHCupPath tmpUnpack) "ghc-bootstrap"
+    CapturedProcess {..} <- lift $ makeOut
+      ["show!", "--quiet", "VALUE=ProjectVersion" ] (Just $ fromGHCupPath tmpUnpack)
+    case _exitCode of
+      ExitSuccess -> either (throwE . ParseError . show) pure . MP.parse ghcProjectVersion "" . T.pack . stripNewlineEnd . T.unpack . decUTF8Safe' $ _stdOut
+      ExitFailure c -> throwE $ NonZeroExit c "make" ["show!", "--quiet", "VALUE=ProjectVersion" ]
+
   defaultConf =
     let cross_mk = $(LitE . StringL <$> (qAddDependentFile "data/build_mk/cross" >> runIO (readFile "data/build_mk/cross")))
         default_mk = $(LitE . StringL <$> (qAddDependentFile "data/build_mk/default" >> runIO (readFile "data/build_mk/default")))
     in case targetGhc of
-         Left (GHCTargetVersion (Just _) _) -> cross_mk
+         SourceDist (GHCTargetVersion (Just _) _) -> cross_mk
          _ -> default_mk
 
   compileHadrianBindist :: ( MonadReader env m
@@ -948,7 +1027,7 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
 
    -- for cross, we need Stage1Only
     case targetGhc of
-      Left (GHCTargetVersion (Just _) _) -> when ("Stage1Only = YES" `notElem` lines') $ throwE
+      SourceDist (GHCTargetVersion (Just _) _) -> when ("Stage1Only = YES" `notElem` lines') $ throwE
         (InvalidBuildConfig
           [s|Cross compiling needs to be a Stage1 build, add "Stage1Only = YES" to your config!|]
         )

lib/GHCup/HLS.hs

@@ -71,6 +71,12 @@ import qualified Text.Megaparsec               as MP
 import Text.PrettyPrint.HughesPJClass (prettyShow)
 
 
+data HLSVer = SourceDist Version
+            | GitDist GitBranch
+            | HackageDist Version
+            | RemoteDist URI
+
+
 
     --------------------
     --[ Installation ]--
@@ -99,6 +105,7 @@ installHLSBindist :: ( MonadMask m
                        '[ AlreadyInstalled
                         , CopyError
                         , DigestError
+                        , ContentLengthError
                         , GPGError
                         , DownloadFailed
                         , NoDownload
@@ -291,6 +298,7 @@ installHLSBin :: ( MonadMask m
                    '[ AlreadyInstalled
                     , CopyError
                     , DigestError
+                    , ContentLengthError
                     , GPGError
                     , DownloadFailed
                     , NoDownload
@@ -324,34 +332,39 @@ compileHLS :: ( MonadMask m
               , MonadUnliftIO m
               , MonadFail m
               )
-           => Either Version GitBranch
+           => HLSVer
            -> [Version]
            -> Maybe Int
-           -> Maybe Version
+           -> Either Bool Version
            -> InstallDir
            -> Maybe (Either FilePath URI)
            -> Maybe URI
+           -> Bool
            -> Maybe (Either FilePath [URI])  -- ^ patches
            -> [Text]                   -- ^ additional args to cabal install
            -> Excepts '[ NoDownload
                        , GPGError
                        , DownloadFailed
                        , DigestError
+                       , ContentLengthError
                        , UnknownArchive
                        , TarDirDoesNotExist
                        , ArchiveResult
                        , BuildFailed
                        , NotInstalled
                        ] m Version
-compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal patches cabalArgs = do
+compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal updateCabal patches cabalArgs = do
   PlatformRequest { .. } <- lift getPlatformReq
   GHCupInfo { _ghcupDownloads = dls } <- lift getGHCupInfo
   Dirs { .. } <- lift getDirs
 
+  when updateCabal $ reThrowAll @_ @'[ProcessError] DownloadFailed $ do
+    lift $ logInfo "Updating cabal DB"
+    lEM $ exec "cabal" ["update"] (Just $ fromGHCupPath tmpDir) Nothing
 
-  (workdir, tver) <- case targetHLS of
+  (workdir, tmpUnpack, tver, git_describe) <- case targetHLS of
     -- unpack from version tarball
-    Left tver -> do
+    SourceDist tver -> do
       lift $ logDebug $ "Requested to compile: " <> prettyVer tver
 
       -- download source tarball
@@ -369,13 +382,50 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal patc
                        (liftE . intoSubdir tmpUnpack)
                        (view dlSubdir dlInfo)
 
-      pure (workdir, tver)
+      pure (workdir, tmpUnpack, tver, Nothing)
+
+    HackageDist tver -> do
+      lift $ logDebug $ "Requested to compile (from hackage): " <> prettyVer tver
+
+      -- download source tarball
+      tmpUnpack <- lift mkGhcupTmpDir
+      let hls = "haskell-language-server-" <> T.unpack (prettyVer tver)
+      reThrowAll @_ @'[ProcessError] DownloadFailed $ do
+        -- unpack
+        lEM $ exec "cabal" ["unpack", hls] (Just $ fromGHCupPath tmpUnpack) Nothing
+
+      let workdir = appendGHCupPath tmpUnpack hls
+
+      pure (workdir, tmpUnpack, tver, Nothing)
+
+    RemoteDist uri -> do
+      lift $ logDebug $ "Requested to compile (from uri): " <> T.pack (show uri)
+
+      -- download source tarball
+      tmpDownload <- lift withGHCupTmpDir
+      tmpUnpack <- lift mkGhcupTmpDir
+      tar <- liftE $ download uri Nothing Nothing Nothing (fromGHCupPath tmpDownload) Nothing False
+      (cf, tver) <- liftE $ cleanUpOnError tmpUnpack $ do
+        unpackToDir (fromGHCupPath tmpUnpack) tar
+        let regex = [s|^(.*/)*haskell-language-server\.cabal$|] :: B.ByteString
+        [cabalFile] <- liftIO $ findFilesDeep
+          tmpUnpack
+          (makeRegexOpts compExtended
+                         execBlank
+                         regex
+          )
+        tver <- getCabalVersion (fromGHCupPath tmpUnpack </> cabalFile)
+        pure (cabalFile, tver)
+
+      let workdir = appendGHCupPath tmpUnpack (takeDirectory cf)
+
+      pure (workdir, tmpUnpack, tver, Nothing)
 
     -- clone from git
-    Right GitBranch{..} -> do
+    GitDist GitBranch{..} -> do
       tmpUnpack <- lift mkGhcupTmpDir
       let git args = execLogged "git" ("--no-pager":args) (Just $ fromGHCupPath tmpUnpack) "git" Nothing
-      tver <- reThrowAll @_ @'[ProcessError] DownloadFailed $ do
+      reThrowAll @_ @'[ProcessError] DownloadFailed $ do
         let rep = fromMaybe "https://github.com/haskell/haskell-language-server.git" repo
         lift $ logInfo $ "Fetching git repo " <> T.pack rep <> " at ref " <> T.pack ref <> " (this may take a while)"
         lEM $ git [ "init" ]
@@ -384,37 +434,57 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal patc
                   , "origin"
                   , fromString rep ]
 
-        let fetch_args =
+        -- figure out if we can do a shallow clone
-                  [ "fetch"
+        remoteBranches <- catchE @ProcessError @'[ProcessError] @'[] (\_ -> pure [])
-                  , "--depth"
+            $ fmap processBranches $ gitOut ["ls-remote", "--heads", "origin"] (fromGHCupPath tmpUnpack)
-                  , "1"
+        let shallow_clone
-                  , "--quiet"
+              | gitDescribeRequested                 = False
-                  , "origin"
+              | isCommitHash ref                     = True
-                  , fromString ref ]
+              | fromString ref `elem` remoteBranches = True
+              | otherwise                            = False
+
+        lift $ logDebug $ "Shallow clone: " <> T.pack (show shallow_clone)
+
+        -- fetch
+        let fetch_args
+              | shallow_clone = ["fetch", "--depth", "1", "--quiet", "origin", fromString ref]
+              | otherwise     = ["fetch", "--tags",       "--quiet", "origin"                ]
         lEM $ git fetch_args
 
-        lEM $ git [ "checkout", "FETCH_HEAD" ]
+        -- checkout
-        (Just gpd) <- parseGenericPackageDescriptionMaybe <$> liftIO (B.readFile (fromGHCupPath tmpUnpack </> "haskell-language-server.cabal"))
+        lEM $ git [ "checkout", fromString ref ]
-        pure . (\c -> Version Nothing c [] Nothing)
-          . NE.fromList . fmap (NE.fromList . (:[]) . digits . fromIntegral)
-          . versionNumbers
-          . pkgVersion
-          . package
-          . packageDescription
-          $ gpd
 
-      liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
+        -- gather some info
-      lift $ logInfo $ "Git version " <> T.pack ref <> " corresponds to HLS version " <> prettyVer tver
+        git_describe <- if shallow_clone
+                        then pure Nothing
+                        else fmap Just $ gitOut ["describe", "--tags"] (fromGHCupPath tmpUnpack)
+        chash <- gitOut ["rev-parse", "HEAD" ] (fromGHCupPath tmpUnpack)
+        tver <- getCabalVersion (fromGHCupPath tmpUnpack </> "haskell-language-server.cabal")
 
-      pure (tmpUnpack, tver)
+        liftE $ catchWarn $ lEM @_ @'[ProcessError] $ darwinNotarization _rPlatform (fromGHCupPath tmpUnpack)
+        lift $ logInfo $ "Examining git ref " <> T.pack ref <> "\n  " <>
+                                    "HLS version (from cabal file): " <> prettyVer tver <>
+                                    (if not shallow_clone then "\n  " <> "'git describe' output: " <> fromJust git_describe else mempty) <>
+                                    (if isCommitHash ref then mempty else "\n  " <> "commit hash: " <> chash)
+
+        pure (tmpUnpack, tmpUnpack, tver, git_describe)
 
   -- the version that's installed may differ from the
   -- compiled version, so the user can overwrite it
-  let installVer = fromMaybe tver ov
+  installVer <- case ov of
+                  Left True -> case git_describe of
+                                 -- git describe
+                                 Just h -> either (fail . displayException) pure . version $ h
+                                 -- git describe, but not building from git, lol
+                                 Nothing -> pure tver
+                  -- default: use detected version
+                  Left False -> pure tver
+                  -- overwrite version with users value
+                  Right v -> pure v
 
   liftE $ runBuildAction
-    workdir
+    tmpUnpack
-    (reThrowAll @_ @'[GPGError, DownloadFailed, DigestError, PatchFailed, ProcessError, FileAlreadyExistsError, CopyError] @'[BuildFailed] (BuildFailed $ fromGHCupPath workdir) $ do
+    (reThrowAll @_ @'[GPGError, DownloadFailed, DigestError, ContentLengthError, PatchFailed, ProcessError, FileAlreadyExistsError, CopyError] @'[BuildFailed] (BuildFailed $ fromGHCupPath workdir) $ do
       let tmpInstallDir = fromGHCupPath workdir </> "out"
       liftIO $ createDirRecursive' tmpInstallDir
 
@@ -429,14 +499,22 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal patc
               pure "cabal.project"
           | otherwise -> pure (takeFileName cp)
         Just (Right uri) -> do
-          tmpUnpack <- lift withGHCupTmpDir
+          tmpUnpack' <- lift withGHCupTmpDir
-          cp <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpUnpack) (Just "cabal.project") False
+          cp <- liftE $ download uri Nothing Nothing Nothing (fromGHCupPath tmpUnpack') (Just "cabal.project") False
           copyFileE cp (fromGHCupPath workdir </> "cabal.project") False
           pure "cabal.project"
-        Nothing -> pure "cabal.project"
+        Nothing
+          | HackageDist _ <- targetHLS -> do
+              liftIO $ B.writeFile (fromGHCupPath workdir </> "cabal.project") "packages: ./"
+              pure "cabal.project"
+          | RemoteDist _ <- targetHLS -> do
+              let cabalFile = fromGHCupPath workdir </> "cabal.project"
+              liftIO $ whenM (not <$> doesFileExist cabalFile) $ B.writeFile cabalFile "packages: ./"
+              pure "cabal.project"
+          | otherwise -> pure "cabal.project"
       forM_ cabalProjectLocal $ \uri -> do
-        tmpUnpack <- lift withGHCupTmpDir
+        tmpUnpack' <- lift withGHCupTmpDir
-        cpl <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpUnpack) (Just (cp <.> "local")) False
+        cpl <- liftE $ download uri Nothing Nothing Nothing (fromGHCupPath tmpUnpack') (Just (cp <.> "local")) False
         copyFileE cpl (fromGHCupPath workdir </> cp <.> "local") False
       artifacts <- forM (sort ghcs) $ \ghc -> do
         let ghcInstallDir = tmpInstallDir </> T.unpack (prettyVer ghc)
@@ -464,7 +542,7 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal patc
         pure ghcInstallDir
 
       forM_ artifacts $ \artifact -> do
-        logInfo $ T.pack (show artifact)
+        logDebug $ T.pack (show artifact)
         liftIO $ renameFile (artifact </> "haskell-language-server" <.> exeExt)
           (tmpInstallDir </> "haskell-language-server-" <> takeFileName artifact <.> exeExt)
         liftIO $ renameFile (artifact </> "haskell-language-server-wrapper" <.> exeExt)
@@ -479,6 +557,10 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal patc
     )
 
   pure installVer
+ where
+  gitDescribeRequested = case ov of
+                           Left b -> b
+                           _      -> False
 
 
     -----------------
@@ -614,8 +696,11 @@ rmHLSVer ver = do
       lift $ recycleFile f
       when (not (null survivors)) $ throwE $ UninstallFailed hlsDir survivors
     Nothing -> do
-      lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack hlsDir
+      isDir <- liftIO $ doesDirectoryExist hlsDir
-      recyclePathForcibly hlsDir'
+      isSyml <- liftIO $ handleIO (\_ -> pure False) $ pathIsSymbolicLink hlsDir
+      when (isDir && not isSyml) $ do
+        lift $ logInfo $ "Removing legacy directory recursively: " <> T.pack hlsDir
+        recyclePathForcibly hlsDir'
 
   when (Just ver == isHlsSet) $ do
     -- set latest hls
@@ -623,3 +708,19 @@ rmHLSVer ver = do
     case headMay . reverse . sort $ hlsVers of
       Just latestver -> liftE $ setHLS latestver SetHLSOnly Nothing
       Nothing        -> pure ()
+
+
+getCabalVersion :: (MonadIO m, MonadFail m) => FilePath -> m Version
+getCabalVersion fp = do
+  contents <- liftIO $ B.readFile fp
+  gpd <- case parseGenericPackageDescriptionMaybe contents of
+           Nothing -> fail $ "could not parse cabal file: " <> fp
+           Just r -> pure r
+  let tver = (\c -> Version Nothing c [] Nothing)
+           . NE.fromList . fmap (NE.fromList . (:[]) . digits . fromIntegral)
+           . versionNumbers
+           . pkgVersion
+           . package
+           . packageDescription
+           $ gpd
+  pure tver

lib/GHCup/Prelude/File/Posix.hs

@@ -48,6 +48,7 @@ import           Streamly.Internal.Data.Unfold.Type
 import qualified Streamly.Internal.Data.Unfold as U
 import           Streamly.Internal.Control.Concurrent ( withRunInIO )
 import           Streamly.Internal.Data.IOFinalizer   ( newIOFinalizer, runIOFinalizer )
+import GHC.IO.Exception (IOException(ioe_type), IOErrorType (..))
 
 
 -- | On unix, we can use symlinks, so we just get the
@@ -116,8 +117,18 @@ copyFile from to fail' = do
         let dflags = [ FD.oNofollow
                      , if fail' then FD.oExcl else FD.oTrunc
                      ]
+        let openFdHandle' = openFdHandle to SPI.WriteOnly dflags $ Just sourceFileMode
         bracket
-          (openFdHandle to SPI.WriteOnly dflags $ Just sourceFileMode)
+          (handleIO (\e -> if
+                              -- if we copy from regular file to symlink, we need
+                              -- to delete the symlink
+                              | ioe_type e == InvalidArgument
+                              , not fail' -> do
+                                 removeLink to
+                                 openFdHandle'
+                              | otherwise -> throwIO e
+                    )
+            openFdHandle')
           (hClose . snd)
           $ \(_, tH) -> do
               hSetBinaryMode fH True

lib/GHCup/Prelude/File/Posix/Traversals.hs

@@ -36,8 +36,8 @@ import System.Posix.Internals (peekFilePath)
 ----------------------------------------------------------
 -- dodgy stuff
 
-type CDir = ()
+data {-# CTYPE "DIR" #-} CDir
-type CDirent = ()
+data {-# CTYPE "struct dirent" #-} CDirent
 
 -- Posix doesn't export DirStream, so to re-use that type we need to use
 -- unsafeCoerce.  It's just a newtype, so this is a legitimate usage.
@@ -56,7 +56,7 @@ foreign import ccall unsafe "__hscore_free_dirent"
 foreign import ccall unsafe "__hscore_d_name"
   c_name :: Ptr CDirent -> IO CString
 
-foreign import ccall unsafe "__posixdir_d_type"
+foreign import capi unsafe "dirutils.h __posixdir_d_type"
   c_type :: Ptr CDirent -> IO DirType
 
 ----------------------------------------------------------

lib/GHCup/Prelude/Process/Windows.hs

@@ -206,10 +206,36 @@ exec :: MonadIO m
      -> Maybe [(String, String)] -- ^ optional environment
      -> m (Either ProcessError ())
 exec exe args chdir env = do
+  -- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/375
+  forM_ (Map.fromList <$> env) $ \cEnv -> do
+    let paths = ["PATH", "Path"]
+        curPaths = (\x -> maybe [] splitSearchPath (Map.lookup x cEnv)) =<< paths
+        newPath = intercalate [searchPathSeparator] curPaths
+    liftIO $ setEnv "PATH" ""
+    liftIO $ setEnv "Path" newPath
   cp <- createProcessWithMingwPath ((proc exe args) { cwd = chdir, env = env })
   exit_code <- liftIO $ withCreateProcess cp $ \_ _ _ p -> waitForProcess p
   pure $ toProcessError exe args exit_code
 
+-- | Like 'exec', except doesn't add msys2 stuff to PATH.
+execNoMinGW :: MonadIO m
+     => FilePath       -- ^ thing to execute
+     -> [FilePath]     -- ^ args for the thing
+     -> Maybe FilePath   -- ^ optionally chdir into this
+     -> Maybe [(String, String)] -- ^ optional environment
+     -> m (Either ProcessError ())
+execNoMinGW exe args chdir env = do
+  -- https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/375
+  forM_ (Map.fromList <$> env) $ \cEnv -> do
+    let paths = ["PATH", "Path"]
+        curPaths = (\x -> maybe [] splitSearchPath (Map.lookup x cEnv)) =<< paths
+        newPath = intercalate [searchPathSeparator] curPaths
+    liftIO $ setEnv "PATH" ""
+    liftIO $ setEnv "Path" newPath
+  let cp = (proc exe args) { cwd = chdir, env = env }
+  exit_code <- liftIO $ withCreateProcess cp $ \_ _ _ p -> waitForProcess p
+  pure $ toProcessError exe args exit_code
+
 
 -- | Thin wrapper around `executeFile`.
 execShell :: MonadIO m

lib/GHCup/Prompts.hs

@@ -0,0 +1,28 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE FlexibleContexts #-}
+
+module GHCup.Prompts
+  ( PromptQuestion,
+    PromptResponse (..),
+    getUserPromptResponse,
+  )
+where
+
+import Control.Monad.Reader
+import qualified Data.Text.IO as TIO
+import GHCup.Prelude.Logger
+import GHCup.Types.Optics
+import GHCup.Types (PromptQuestion, PromptResponse(..))
+
+getUserPromptResponse :: ( HasLog env
+                         , MonadReader env m
+                         , MonadIO m)
+                      => PromptQuestion
+                      -> m PromptResponse
+
+getUserPromptResponse prompt = do
+  logInfo prompt
+  resp <- liftIO TIO.getLine
+  if resp `elem` ["YES", "yes", "y", "Y"]
+    then pure PromptYes
+    else pure PromptNo

lib/GHCup/Stack.hs

@@ -82,6 +82,7 @@ installStackBin :: ( MonadMask m
                      '[ AlreadyInstalled
                       , CopyError
                       , DigestError
+                      , ContentLengthError
                       , GPGError
                       , DownloadFailed
                       , NoDownload
@@ -120,6 +121,7 @@ installStackBindist :: ( MonadMask m
                          '[ AlreadyInstalled
                           , CopyError
                           , DigestError
+                          , ContentLengthError
                           , GPGError
                           , DownloadFailed
                           , NoDownload

lib/GHCup/Types.hs

@@ -262,6 +262,7 @@ data DownloadInfo = DownloadInfo
   { _dlUri    :: URI
   , _dlSubdir :: Maybe TarDir
   , _dlHash   :: Text
+  , _dlCSize  :: Maybe Integer
   }
   deriving (Eq, Ord, GHC.Generic, Show)
 
@@ -297,10 +298,16 @@ instance NFData URLSource
 instance NFData (URIRef Absolute) where
   rnf (URI !_ !_ !_ !_ !_) = ()
 
+data MetaMode = Strict
+              | Lax
+  deriving (Show, Read, Eq, GHC.Generic)
+
+instance NFData MetaMode
 
 data UserSettings = UserSettings
   { uCache       :: Maybe Bool
   , uMetaCache   :: Maybe Integer
+  , uMetaMode    :: Maybe MetaMode
   , uNoVerify    :: Maybe Bool
   , uVerbose     :: Maybe Bool
   , uKeepDirs    :: Maybe KeepDirs
@@ -309,17 +316,19 @@ data UserSettings = UserSettings
   , uUrlSource   :: Maybe URLSource
   , uNoNetwork   :: Maybe Bool
   , uGPGSetting  :: Maybe GPGSetting
+  , uPlatformOverride    :: Maybe PlatformRequest
   }
   deriving (Show, GHC.Generic)
 
 defaultUserSettings :: UserSettings
-defaultUserSettings = UserSettings Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing
+defaultUserSettings = UserSettings Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing Nothing
 
 fromSettings :: Settings -> Maybe KeyBindings -> UserSettings
 fromSettings Settings{..} Nothing =
   UserSettings {
       uCache = Just cache
     , uMetaCache = Just metaCache
+    , uMetaMode = Just metaMode
     , uNoVerify = Just noVerify
     , uVerbose = Just verbose
     , uKeepDirs = Just keepDirs
@@ -328,22 +337,24 @@ fromSettings Settings{..} Nothing =
     , uKeyBindings = Nothing
     , uUrlSource = Just urlSource
     , uGPGSetting = Just gpgSetting
+    , uPlatformOverride = platformOverride
   }
 fromSettings Settings{..} (Just KeyBindings{..}) =
   let ukb = UserKeyBindings
-            { kUp           = Just bUp        
+            { kUp           = Just bUp
-            , kDown         = Just bDown      
+            , kDown         = Just bDown
-            , kQuit         = Just bQuit      
+            , kQuit         = Just bQuit
-            , kInstall      = Just bInstall   
+            , kInstall      = Just bInstall
-            , kUninstall    = Just bUninstall 
+            , kUninstall    = Just bUninstall
-            , kSet          = Just bSet       
+            , kSet          = Just bSet
-            , kChangelog    = Just bChangelog 
+            , kChangelog    = Just bChangelog
             , kShowAll      = Just bShowAllVersions
             , kShowAllTools = Just bShowAllTools
             }
   in UserSettings {
       uCache = Just cache
     , uMetaCache = Just metaCache
+    , uMetaMode = Just metaMode
     , uNoVerify = Just noVerify
     , uVerbose = Just verbose
     , uKeepDirs = Just keepDirs
@@ -352,6 +363,7 @@ fromSettings Settings{..} (Just KeyBindings{..}) =
     , uKeyBindings = Just ukb
     , uUrlSource = Just urlSource
     , uGPGSetting = Just gpgSetting
+    , uPlatformOverride = platformOverride
   }
 
 data UserKeyBindings = UserKeyBindings
@@ -407,6 +419,9 @@ data AppState = AppState
 
 instance NFData AppState
 
+fromAppState :: AppState -> LeanAppState
+fromAppState AppState {..} = LeanAppState {..}
+
 data LeanAppState = LeanAppState
   { settings :: Settings
   , dirs :: Dirs
@@ -418,16 +433,18 @@ instance NFData LeanAppState
 
 
 data Settings = Settings
-  { cache      :: Bool
+  { cache            :: Bool
-  , metaCache  :: Integer
+  , metaCache        :: Integer
-  , noVerify   :: Bool
+  , metaMode         :: MetaMode
-  , keepDirs   :: KeepDirs
+  , noVerify         :: Bool
-  , downloader :: Downloader
+  , keepDirs         :: KeepDirs
-  , verbose    :: Bool
+  , downloader       :: Downloader
-  , urlSource  :: URLSource
+  , verbose          :: Bool
-  , noNetwork  :: Bool
+  , urlSource        :: URLSource
-  , gpgSetting :: GPGSetting
+  , noNetwork        :: Bool
-  , noColor    :: Bool -- this also exists in LoggerConfig
+  , gpgSetting       :: GPGSetting
+  , noColor          :: Bool -- this also exists in LoggerConfig
+  , platformOverride :: Maybe PlatformRequest
   }
   deriving (Show, GHC.Generic)
 
@@ -435,7 +452,7 @@ defaultMetaCache :: Integer
 defaultMetaCache = 300 -- 5 minutes
 
 defaultSettings :: Settings
-defaultSettings = Settings False defaultMetaCache False Never Curl False GHCupURL False GPGNone False
+defaultSettings = Settings False defaultMetaCache Lax False Never Curl False GHCupURL False GPGNone False Nothing
 
 instance NFData Settings
 
@@ -654,10 +671,7 @@ isSafeDir (IsolateDirResolved _) = False
 isSafeDir (GHCupDir _)           = True
 isSafeDir (GHCupBinDir _)        = False
 
+type PromptQuestion = Text
 
-
+data PromptResponse = PromptYes | PromptNo
-
+  deriving (Show, Eq)
-
-
-
-

lib/GHCup/Types/JSON.hs

@@ -43,6 +43,7 @@ import qualified Text.Megaparsec               as MP
 import qualified Text.Megaparsec.Char          as MPC
 
 
+deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''MetaMode
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Architecture
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''LinuxDistro
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''VSep
@@ -56,6 +57,7 @@ deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Global
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''KeepDirs
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Downloader
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''GPGSetting
+deriveJSON defaultOptions { fieldLabelModifier = \str' -> maybe str' T.unpack . T.stripPrefix (T.pack "r-") . T.pack . kebab . tail $ str' } ''PlatformRequest
 
 instance ToJSON Tag where
   toJSON Latest             = String "Latest"

lib/GHCup/Utils.hs

@@ -61,6 +61,7 @@ import           Control.Monad.Reader
 import           Control.Monad.Trans.Resource
                                          hiding ( throwM )
 import           Control.Monad.IO.Unlift        ( MonadUnliftIO( withRunInIO ) )
+import           Data.Char                      ( isHexDigit )
 import           Data.Bifunctor                 ( first )
 import           Data.ByteString                ( ByteString )
 import           Data.Either
@@ -1034,13 +1035,13 @@ applyAnyPatch :: ( MonadReader env m
                  , MonadIO m)
               => Maybe (Either FilePath [URI])
               -> FilePath
-              -> Excepts '[PatchFailed, DownloadFailed, DigestError, GPGError] m ()
+              -> Excepts '[PatchFailed, DownloadFailed, DigestError, ContentLengthError, GPGError] m ()
 applyAnyPatch Nothing _                   = pure ()
 applyAnyPatch (Just (Left pdir)) workdir  = liftE $ applyPatches pdir workdir
 applyAnyPatch (Just (Right uris)) workdir = do
   tmpUnpack <- fromGHCupPath <$> lift withGHCupTmpDir
   forM_ uris $ \uri -> do
-    patch <- liftE $ download uri Nothing Nothing tmpUnpack Nothing False
+    patch <- liftE $ download uri Nothing Nothing Nothing tmpUnpack Nothing False
     liftE $ applyPatch patch workdir
 
 
@@ -1096,7 +1097,8 @@ runBuildAction bdir action = do
 
 -- | Clean up the given directory if the action fails,
 -- depending on the Settings.
-cleanUpOnError :: ( MonadReader env m
+cleanUpOnError :: forall e m a env .
+                  ( MonadReader env m
                   , HasDirs env
                   , HasSettings env
                   , MonadIO m
@@ -1170,7 +1172,7 @@ ensureGlobalTools :: ( MonadMask m
                      , MonadUnliftIO m
                      , MonadFail m
                      )
-                  => Excepts '[GPGError, DigestError , DownloadFailed, NoDownload] m ()
+                  => Excepts '[GPGError, DigestError, ContentLengthError, DownloadFailed, NoDownload] m ()
 ensureGlobalTools
   | isWindows = do
       (GHCupInfo _ _ gTools) <- lift getGHCupInfo
@@ -1182,8 +1184,8 @@ ensureGlobalTools
           lift $ logWarn "Digest doesn't match, redownloading gs.exe..."
           lift $ logDebug ("rm -f " <> T.pack (fromGHCupPath (cacheDir dirs) </> "gs.exe"))
           lift $ hideError doesNotExistErrorType $ recycleFile (fromGHCupPath (cacheDir dirs) </> "gs.exe")
-          liftE @'[GPGError, DigestError , DownloadFailed] $ dl
+          liftE @'[GPGError, DigestError, ContentLengthError, DownloadFailed] $ dl
-        ) `catchE` liftE @'[GPGError, DigestError , DownloadFailed] dl
+        ) `catchE` liftE @'[GPGError, DigestError, ContentLengthError, DownloadFailed] dl
   | otherwise = pure ()
 
 
@@ -1268,10 +1270,44 @@ warnAboutHlsCompatibility = do
   case (currentGHC, currentHLS) of
     (Just gv, Just hv) | gv `notElem` supportedGHC -> do
       logWarn $
-        "GHC " <> T.pack (prettyShow gv) <> " is not compatible with " <>
+        "GHC-" <> T.pack (prettyShow gv) <> " appears to have no corresponding HLS-" <> T.pack (prettyShow hv) <> " binary." <> "\n" <>
-        "Haskell Language Server " <> T.pack (prettyShow hv) <> "." <> "\n" <>
+        "Haskell IDE support may not work." <> "\n" <>
-        "Haskell IDE support may not work until this is fixed." <> "\n" <>
+        "You can try to either: " <> "\n" <>
-        "Install a different HLS version, or install and set one of the following GHCs:" <> "\n" <>
+        "  1. Install a different HLS version (e.g. downgrade for older GHCs)" <> "\n" <>
-        T.pack (prettyShow supportedGHC)
+        "  2. Install and set one of the following GHCs: " <> T.pack (prettyShow supportedGHC) <> "\n" <>
+        "  3. Let GHCup compile HLS for you, e.g. run: ghcup compile hls -g " <> T.pack (prettyShow hv) <> " --ghc " <> T.pack (prettyShow gv) <> " --cabal-update\n" <>
+        "     (see https://www.haskell.org/ghcup/guide/#hls for more information)"
 
     _ -> return ()
+
+
+
+    -----------
+    --[ Git ]--
+    -----------
+
+
+
+isCommitHash :: String -> Bool
+isCommitHash str' = let hex = all isHexDigit str'
+                        len = length str'
+                    in hex && len == 40
+
+
+gitOut :: (MonadReader env m, HasLog env, MonadIO m) => [String] -> FilePath -> Excepts '[ProcessError] m T.Text
+gitOut args dir = do
+  CapturedProcess {..} <- lift $ executeOut "git" args (Just dir)
+  case _exitCode of
+    ExitSuccess   -> pure $ T.pack $ stripNewlineEnd $ T.unpack $ decUTF8Safe' _stdOut
+    ExitFailure c -> do
+      let pe = NonZeroExit c "git" args
+      lift $ logDebug $ T.pack (prettyShow pe)
+      throwE pe
+
+processBranches :: T.Text -> [String]
+processBranches str' = let lines'   = lines (T.unpack str')
+                           words'   = fmap words lines'
+                           refs     = catMaybes $ fmap (`atMay` 1) words'
+                           branches = catMaybes $ fmap (stripPrefix "refs/heads/") $ filter (isPrefixOf "refs/heads/") refs
+                       in branches
+

lib/GHCup/Utils/Dirs.hs

@@ -465,15 +465,22 @@ withGHCupTmpDir :: ( MonadReader env m
                    , MonadMask m
                    , MonadIO m)
                 => m GHCupPath
-withGHCupTmpDir = snd <$> withRunInIO (\run ->
+withGHCupTmpDir = do
-  run
+  Settings{keepDirs} <- getSettings
-    $ allocate
+  snd <$> withRunInIO (\run ->
-        (run mkGhcupTmpDir)
+    run
-        (\fp ->
+      $ allocate
-            handleIO (\e -> run
+          (run mkGhcupTmpDir)
-                $ logDebug ("Resource cleanup failed for " <> T.pack (fromGHCupPath fp) <> ", error was: " <> T.pack (displayException e)))
+          (\fp -> if -- we don't know whether there was a failure, so can only
-            . removePathForcibly
+                     -- decide for 'Always'
-            $ fp))
+                     | keepDirs == Always -> pure ()
+                     | otherwise -> handleIO (\e -> run
+                        $ logDebug ("Resource cleanup failed for "
+                                   <> T.pack (fromGHCupPath fp)
+                                   <> ", error was: "
+                                   <> T.pack (displayException e)))
+                        . removePathForcibly
+                        $ fp))
 
 
 

mkdocs.yml

@@ -1,10 +1,10 @@
 site_name: GHCup
 site_url: https://www.haskell.org/ghcup
-site_description: GHCup is an installer for the general purpose language Haskell.
+site_description: GHCup is the main installer for the general purpose language Haskell.
 site_author: GHCup Team
 site_favicon: haskell_logo.png
 
-repo_url: https://gitlab.haskell.org/haskell/ghcup-hs
+repo_url: https://github.com/haskell/ghcup-hs
 
 theme:
     name: mkdocs
@@ -13,7 +13,7 @@ theme:
 
 nav:
   - Home: index.md
-  - "Getting started": install.md
+  - "Installation": install.md
   - "First steps": steps.md
   - "User Guide": guide.md
   - "Developer Guide": dev.md

scripts/bootstrap/bootstrap-haskell

@@ -12,10 +12,12 @@
 #   * BOOTSTRAP_HASKELL_VERBOSE - any nonzero value for more verbose installation
 #   * BOOTSTRAP_HASKELL_GHC_VERSION - the ghc version to install
 #   * BOOTSTRAP_HASKELL_CABAL_VERSION - the cabal version to install
-#   * BOOTSTRAP_HASKELL_INSTALL_STACK - whether to install latest stack
+#   * BOOTSTRAP_HASKELL_INSTALL_NO_STACK - disable installation of stack
+#   * BOOTSTRAP_HASKELL_INSTALL_NO_STACK_HOOK - disable installation stack ghcup hook
 #   * BOOTSTRAP_HASKELL_INSTALL_HLS - whether to install latest hls
 #   * BOOTSTRAP_HASKELL_ADJUST_BASHRC - whether to adjust PATH in bashrc (prepend)
 #   * BOOTSTRAP_HASKELL_ADJUST_CABAL_CONFIG - whether to adjust mingw paths in cabal.config on windows
+#   * BOOTSTRAP_HASKELL_DOWNLOADER - which downloader to use (default: curl)
 #   * GHCUP_BASE_URL - the base url for ghcup binary download (use this to overwrite https://downloads.haskell.org/~ghcup with a mirror)
 
 # License: LGPL-3.0
@@ -26,10 +28,11 @@
 
 plat="$(uname -s)"
 arch=$(uname -m)
-ghver="0.1.17.8"
+ghver="0.1.18.0"
 : "${GHCUP_BASE_URL:=https://downloads.haskell.org/~ghcup}"
 
 export GHCUP_SKIP_UPDATE_CHECK=yes
+: "${BOOTSTRAP_HASKELL_DOWNLOADER:=curl}"
 
 case "${plat}" in
         MSYS*|MINGW*)
@@ -133,6 +136,20 @@ _eghcup() {
     fi
 }
 
+_ecabal() {
+    # shellcheck disable=SC2317
+    if [ -n "${CABAL_BIN}" ] ; then
+        "${CABAL_BIN}" "$@"
+    else
+        # shellcheck disable=SC2086
+        "${GHCUP_BIN}/cabal" "$@"
+    fi
+}
+
+ecabal() {
+	edo _ecabal "$@"
+}
+
 _done() {
 	echo
 	echo "==============================================================================="
@@ -270,7 +287,7 @@ download_ghcup() {
             elif freebsd-version | grep -E '^13.*' ; then
                 freebsd_ver=13
             else
-                die "Unsupported FreeBSD version! Please report a bug at https://gitlab.haskell.org/haskell/ghcup-hs/-/issues"
+                die "Unsupported FreeBSD version! Please report a bug at https://github.com/haskell/ghcup-hs/issues"
             fi
 
 			case "${arch}" in
@@ -313,11 +330,35 @@ download_ghcup() {
     esac
     case "${plat}" in
         MSYS*|MINGW*)
-			edo curl -Lf "${_url}" > "${GHCUP_BIN}"/ghcup.exe
+            case "${BOOTSTRAP_HASKELL_DOWNLOADER}" in
+                "curl")
+	                # shellcheck disable=SC2086
+                    edo curl -Lf ${GHCUP_CURL_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup.exe
+                    ;;
+                "wget")
+	                # shellcheck disable=SC2086
+                    edo wget -O /dev/stdout ${GHCUP_WGET_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup.exe
+                    ;;
+                *)
+                    die "Unknown downloader: ${BOOTSTRAP_HASKELL_DOWNLOADER}"
+                    ;;
+            esac
 			edo chmod +x "${GHCUP_BIN}"/ghcup.exe
 			;;
 		*)
-			edo curl -Lf "${_url}" > "${GHCUP_BIN}"/ghcup
+            case "${BOOTSTRAP_HASKELL_DOWNLOADER}" in
+                "curl")
+	                # shellcheck disable=SC2086
+                    edo curl -Lf ${GHCUP_CURL_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup
+                    ;;
+                "wget")
+	                # shellcheck disable=SC2086
+                    edo wget -O /dev/stdout ${GHCUP_WGET_OPTS} "${_url}" > "${GHCUP_BIN}"/ghcup
+                    ;;
+                *)
+                    die "Unknown downloader: ${BOOTSTRAP_HASKELL_DOWNLOADER}"
+                    ;;
+            esac
 			edo chmod +x "${GHCUP_BIN}"/ghcup
 			;;
 	esac
@@ -344,6 +385,17 @@ download_ghcup() {
 
 	# shellcheck disable=SC1090
     edo . "${GHCUP_DIR}"/env
+    case "${BOOTSTRAP_HASKELL_DOWNLOADER}" in
+        "curl")
+            eghcup config set downloader Curl
+            ;;
+        "wget")
+            eghcup config set downloader Wget
+            ;;
+        *)
+            die "Unknown downloader: ${BOOTSTRAP_HASKELL_DOWNLOADER}"
+            ;;
+    esac
     eghcup upgrade
 }
 
@@ -352,7 +404,11 @@ download_ghcup() {
 find_shell() {
 	case $SHELL in
 		*/zsh) # login shell is zsh
-			GHCUP_PROFILE_FILE="$HOME/.zshrc"
+			if [ -n "$ZDOTDIR" ]; then
+				GHCUP_PROFILE_FILE="$ZDOTDIR/.zshrc"
+			else
+				GHCUP_PROFILE_FILE="$HOME/.zshrc"
+			fi
 			MY_SHELL="zsh" ;;
 		*/bash) # login shell is bash
 			GHCUP_PROFILE_FILE="$HOME/.bashrc"
@@ -537,7 +593,7 @@ adjust_cabal_config() {
     else
         cabal_bin="$HOME/AppData/Roaming/cabal/bin"
     fi
-    edo cabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$cabal_bin"), $(cygpath -w "$GHCUP_MSYS2"/mingw64/bin), $(cygpath -w "$GHCUP_MSYS2"/usr/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/lib)" -f init
+    ecabal user-config -a "extra-prog-path: $(cygpath -w "$GHCUP_BIN"), $(cygpath -w "$cabal_bin"), $(cygpath -w "$GHCUP_MSYS2"/mingw64/bin), $(cygpath -w "$GHCUP_MSYS2"/usr/bin)" -a "extra-include-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/include)" -a "extra-lib-dirs: $(cygpath -w "$GHCUP_MSYS2"/mingw64/lib)" -f init
 }
 
 ask_cabal_config_init() {
@@ -609,7 +665,7 @@ ask_hls() {
 		warn "Do you want to install haskell-language-server (HLS)?"
 		warn "HLS is a language-server that provides IDE-like functionality"
 		warn "and can integrate with different editors, such as Vim, Emacs, VS Code, Atom, ..."
-		warn "Also see https://github.com/haskell/haskell-language-server/blob/master/README.md"
+		warn "Also see https://haskell-language-server.readthedocs.io/en/stable/"
 		warn ""
 		warn "[Y] Yes  [N] No  [?] Help (default is \"N\")."
 		warn ""
@@ -642,40 +698,44 @@ ask_hls() {
 }
 
 ask_stack() {
-	if [ -n "${BOOTSTRAP_HASKELL_INSTALL_STACK}" ] ; then
+    if [ -n "${BOOTSTRAP_HASKELL_INSTALL_NO_STACK}" ] ; then
+		return 0
+    elif [ -n "${BOOTSTRAP_HASKELL_INSTALL_NO_STACK_HOOK}" ] ; then
 		return 1
 	fi
 
 	if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
 		echo "-------------------------------------------------------------------------------"
 
-		warn "Do you want to install stack?"
+		warn "Do you want to enable better integration of stack with GHCup?"
-		warn "Stack is a haskell build tool similar to cabal that is used by some projects."
+        warn "This means that stack won't install its own GHC versions, but uses GHCup's."
-		warn "Also see https://docs.haskellstack.org/"
+        warn "For more information see:"
+        warn "  https://docs.haskellstack.org/en/stable/yaml_configuration/#ghc-installation-customisation-experimental"
+        warn "If you want to keep stacks vanilla behavior, answer 'No'."
 		warn ""
-		warn "[Y] Yes  [N] No  [?] Help (default is \"N\")."
+		warn "[Y] Yes  [N] No  [?] Help (default is \"Y\")."
 		warn ""
 
 		while true; do
 			read -r stack_answer </dev/tty
 
 			case $stack_answer in
-				[Yy]*)
+				[Yy]* | "")
+					return 2 ;;
+				[Nn]*)
 					return 1 ;;
-				[Nn]* | "")
-					return 0 ;;
 				*)
 					echo "Possible choices are:"
 					echo
-					echo "Y - Yes, install stack"
+                    echo "Y - Yes, enable better integration (default)"
-					echo "N - No, don't install anything more (default)"
+					echo "N - No, keep stacks vanilla behavior"
 					echo
 					echo "Please make your choice and press ENTER."
 					;;
 			esac
 		done
 	else
-		return 0
+		return 2
 	fi
 
 	unset stack_answer
@@ -688,11 +748,11 @@ find_shell
 echo
 echo "Welcome to Haskell!"
 echo
-echo "This script will download and install the following binaries:"
+echo "This script can download and install the following binaries:"
 echo "  * ghcup - The Haskell toolchain installer"
 echo "  * ghc   - The Glasgow Haskell Compiler"
 echo "  * cabal - The Cabal build tool for managing Haskell software"
-echo "  * stack - (optional) A cross-platform program for developing Haskell projects"
+echo "  * stack - A cross-platform program for developing Haskell projects (similar to cabal)"
 echo "  * hls   - (optional) A language server for developers to integrate with their editor/IDE"
 echo
 if [ -z "${GHCUP_USE_XDG_DIRS}" ] ; then
@@ -771,7 +831,7 @@ else # don't install ghc and cabal
 				# we'll remove it afterwards
 				tmp_dir="$(mktemp -d)"
 				eghcup --cache install cabal -i "${tmp_dir}" "${BOOTSTRAP_HASKELL_CABAL_VERSION}"
-				PATH="${tmp_dir}:$PATH" do_cabal_config_init $ask_cabal_config_init_answer
+				CABAL_BIN="${tmp_dir}/cabal" do_cabal_config_init $ask_cabal_config_init_answer
 				rm "${tmp_dir}/cabal"
 				unset tmp_dir
 				;;
@@ -789,7 +849,35 @@ esac
 
 case $ask_stack_answer in
 	1)
-		_eghcup --cache install stack || warn "Stack installation failed, continuing anyway"
+		_eghcup --cache install stack || die "Stack installation failed"
+		;;
+	2)
+		_eghcup --cache install stack || die "Stack installation failed"
+        edo mkdir -p "${STACK_ROOOT:-$HOME/.stack}"/hooks
+        hook_exe="${STACK_ROOOT:-$HOME/.stack}"/hooks/ghc-install.sh
+        hook_url="https://www.haskell.org/ghcup/sh/hooks/stack/ghc-install.sh"
+
+        if [ -e "${hook_exe}" ] ; then
+            warn "$hook_exe already exists, skipping hook installation."
+            warn "If you want to reinstall the hook, delete it manually and re-run"
+            warn "this script!"
+        else
+            case "${BOOTSTRAP_HASKELL_DOWNLOADER}" in
+                "curl")
+                    # shellcheck disable=SC2086
+                    edo curl -Lf ${GHCUP_CURL_OPTS} "${hook_url}" > "${hook_exe}"
+                    ;;
+                "wget")
+                    # shellcheck disable=SC2086
+                    edo wget -O /dev/stdout ${GHCUP_WGET_OPTS} "${hook_url}" > "${hook_exe}"
+                    ;;
+                *)
+                    die "Unknown downloader: ${BOOTSTRAP_HASKELL_DOWNLOADER}"
+                    ;;
+            esac
+            edo chmod +x "${hook_exe}"
+        fi
+
 		;;
 	*) ;;
 esac

scripts/bootstrap/bootstrap-haskell.ps1

@@ -36,9 +36,15 @@ param (
     # Instead of installing a new MSys2, use an existing installation
     [string]$ExistingMsys2Dir,
     # Specify the cabal root directory (default: '$InstallDir\cabal')
-    [string]$CabalDir
+    [string]$CabalDir,
+    # Whether to disable use of curl.exe
+    [switch]$DisableCurl,
+    # The Msys2 version to download (e.g. 20221216)
+    [string]$Msys2Version
 )
 
+$DefaultMsys2Version = "20221216"
+
 $Silent = !$Interactive
 
 function Print-Msg {
@@ -242,7 +248,7 @@ if ($Silent -and !($InstallDir)) {
 	Print-Msg -color Magenta -msg (@'
 Welcome to Haskell!
 
-This script will download and install the following programs:
+This script can download and install the following programs:
   * ghcup - The Haskell toolchain installer
   * ghc   - The Glasgow Haskell Compiler
   * msys2 - A linux-style toolchain environment required for many operations
@@ -421,12 +427,15 @@ if (!(Test-Path -Path ('{0}' -f $MsysDir))) {
 	Start-Sleep -s 5
 
     # Download the archive
-    Print-Msg -msg 'Downloading Msys2 archive...'
+	if (!($Msys2Version)) {
-    $archive = 'msys2-x86_64-latest.sfx.exe'
+		$Msys2Version = $DefaultMsys2Version
+	}
+    Print-Msg -msg ('Downloading Msys2 archive {0}...' -f $Msys2Version)
+    $archive = ('msys2-base-x86_64-{0}.sfx.exe' -f $Msys2Version)
     $archivePath = ('{0}\{1}' -f ([IO.Path]::GetTempPath()), "$archive")
-    
+
-    if (Get-Command -Name 'curl.exe' -ErrorAction SilentlyContinue) {
+    if ((Get-Command -Name 'curl.exe' -ErrorAction SilentlyContinue) -and !($DisableCurl)) {
-      Exec "curl.exe" '-o' "$archivePath" ('https://repo.msys2.org/distrib/{0}' -f "$archive")
+      Exec "curl.exe" '-o' "$archivePath" ('https://repo.msys2.org/distrib/x86_64/{0}' -f "$archive")
     } else {
       Get-FileWCSynchronous -url ('https://repo.msys2.org/distrib/{0}' -f $archive) -destinationFolder ([IO.Path]::GetTempPath()) -includeStats
     }
@@ -575,8 +584,8 @@ $Msys2Shell = ('{0}\msys2_shell.cmd' -f $MsysDir)
 # The bootstrap script is always silent, since we ask relevant questions here
 $SilentExport = 'export BOOTSTRAP_HASKELL_NONINTERACTIVE=1 ;'
 
-if ($InstallStack) {
+if (!($InstallStack)) {
-  $StackInstallExport = 'export BOOTSTRAP_HASKELL_INSTALL_STACK=1 ;'
+  $StackInstallExport = 'export BOOTSTRAP_HASKELL_INSTALL_NO_STACK=1 ;'
 }
 
 if ($InstallHLS) {
@@ -591,10 +600,17 @@ if ($Minimal) {
   $MinimalExport = 'export BOOTSTRAP_HASKELL_MINIMAL=1 ;'
 }
 
-if ((Get-Process -ID $PID).ProcessName.StartsWith("bootstrap-haskell") -Or $InBash) {
+if ($DisableCurl) {
-  Exec "$Bash" '-lc' ('{4} {6} {7} {8} {9} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; [[ ''{0}'' = https* ]]  && curl --proto ''=https'' --tlsv1.2 -sSf {0} | bash || cat $(cygpath -m ''{0}'') | bash' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport)
+  $BootstrapDownloader = 'export BOOTSTRAP_HASKELL_DOWNLOADER=wget ;'
+  $DownloadScript = 'wget -O /dev/stdout'
 } else {
-  Exec "$Msys2Shell" '-mingw64' '-mintty' '-c' ('{4} {6} {7} {8} {9} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; trap ''echo Press any key to exit && read -n 1 && exit'' 2 ; [[ ''{0}'' = https* ]]  && curl --proto ''=https'' --tlsv1.2 -sSf {0} | bash || cat $(cygpath -m ''{0}'') | bash ; echo ''Press any key to exit'' && read -n 1' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport)
+  $DownloadScript = 'curl --proto ''=https'' --tlsv1.2 -sSf'
+}
+
+if ((Get-Process -ID $PID).ProcessName.StartsWith("bootstrap-haskell") -Or $InBash) {
+  Exec "$Bash" '-lc' ('{4} {6} {7} {8} {9} {10} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript)
+} else {
+  Exec "$Msys2Shell" '-mingw64' '-mintty'  '-shell' 'bash' '-c' ('{4} {6} {7} {8} {9} {10} [ -n ''{1}'' ] && export GHCUP_MSYS2=$(cygpath -m ''{1}'') ; [ -n ''{2}'' ] && export GHCUP_INSTALL_BASE_PREFIX=$(cygpath -m ''{2}/'') ; export PATH=$(cygpath -u ''{3}/bin''):$PATH ; export CABAL_DIR=''{5}'' ; trap ''echo Press any key to exit && read -n 1 && exit'' 2 ; [[ ''{0}'' = https* ]]  && {11} {0} | bash || cat $(cygpath -m ''{0}'') | bash ; echo ''Press any key to exit'' && read -n 1' -f $BootstrapUrl, $MsysDir, $GhcupBasePrefix, $GhcupDir, $SilentExport, $CabalDirFull, $StackInstallExport, $HLSInstallExport, $AdjustCabalConfigExport, $MinimalExport, $BootstrapDownloader, $DownloadScript)
 }
 
 

scripts/hooks/stack/ghc-install.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+# !! KEEP THIS SCRIPT POSIX COMPLIANT !!
+
+# see https://docs.haskellstack.org/en/stable/yaml_configuration/#ghc-installation-customisation-experimental
+# for documentation about hooks
+
+set -eu
+
+case $HOOK_GHC_TYPE in
+    bindist)
+        ghcdir=$(ghcup whereis --directory ghc "$HOOK_GHC_VERSION" || ghcup run --ghc "$HOOK_GHC_VERSION" --install) || exit 3
+        printf "%s/ghc" "${ghcdir}"
+        ;;
+    git)
+        # TODO: should be somewhat possible
+        >&2 echo "Hook doesn't support installing from source"
+        exit 1
+        ;;
+    *)
+        >&2 echo "Unsupported GHC installation type: $HOOK_GHC_TYPE"
+        exit 2
+        ;;
+esac

test/GHCup/Prelude/File/Posix/TraversalsSpec.hs

@@ -0,0 +1,40 @@
+{-# LANGUAGE CPP #-}
+
+module GHCup.Prelude.File.Posix.TraversalsSpec where
+
+
+#if !defined(IS_WINDOWS)
+import           GHCup.Prelude.File.Posix.Traversals
+
+import           Control.Monad.IO.Class (liftIO)
+import           Data.List
+import           System.Posix.Directory
+import           Unsafe.Coerce
+#endif
+
+import           Test.Hspec
+
+
+
+spec :: Spec
+spec = do
+#if defined(IS_WINDOWS)
+  pure ()
+#else
+  -- https://github.com/haskell/ghcup-hs/issues/415
+  describe "GHCup.Prelude.File.Posix.Traversals" $ do
+    it "readDirEnt" $ do
+      dirstream <- liftIO $ openDirStream "test/data"
+      (dt1, fp1) <- readDirEnt dirstream
+      (dt2, fp2) <- readDirEnt dirstream
+      (dt3, fp3) <- readDirEnt dirstream
+      (dt4, fp4) <- readDirEnt dirstream
+      let xs = sortOn snd [ (dt1, fp1), (dt2, fp2)
+                          , (dt3, fp3), (dt4, fp4)
+                          ]
+      xs `shouldBe` [(unsafeCoerce (4 :: Int),".")
+                    ,(unsafeCoerce (4 :: Int),"..")
+                    ,(unsafeCoerce (4 :: Int),"dir")
+                    ,(unsafeCoerce (8 :: Int),"file")
+                    ]
+#endif

test/GHCup/Types/JSONSpec.hs

@@ -5,6 +5,7 @@ module GHCup.Types.JSONSpec where
 import           GHCup.ArbitraryTypes ()
 import           GHCup.Types hiding ( defaultSettings )
 import           GHCup.Types.JSON ()
+import           GHCup.Prelude
 
 import           Test.Aeson.GenericSpecs
 import           Test.Hspec
@@ -13,5 +14,9 @@ import           Test.Hspec
 
 spec :: Spec
 spec = do
-  roundtripAndGoldenSpecsWithSettings (defaultSettings { goldenDirectoryOption = CustomDirectoryName "test/golden" }) (Proxy @GHCupInfo)
+  roundtripAndGoldenSpecsWithSettings (defaultSettings { goldenDirectoryOption = CustomDirectoryName goldenDir }) (Proxy @GHCupInfo)
+ where
+  goldenDir
+    | isWindows = "test/golden/windows"
+    | otherwise = "test/golden/unix"