Update windows golden test file

Upload golden files on failure
Add content-length property to downloads
2023-01-02 21:42:52 +08:00 · 2023-01-02 20:47:49 +08:00 · 2023-01-02 20:41:42 +08:00 · 2023-01-02 20:35:46 +08:00 · 2022-12-31 21:10:59 +08:00 · 2022-12-27 00:11:23 +08:00
54 changed files with 20277 additions and 343 deletions
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -12,9 +12,12 @@ task:
    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/x86_64-portbld-freebsd-ghcup-*"
+    path: "out/*"
--- a/.github/scripts/build.sh
+++ b/.github/scripts/build.sh
@@ -3,60 +3,74 @@
 set -eux

 . .github/scripts/prereq.sh
+. .github/scripts/common.sh

-if ! command -v ghcup && [ "${RUNNER_OS}" != "FreeBSD" ] ; then
-	find "$GHCUP_INSTALL_BASE_PREFIX"
-	mkdir -p "$GHCUP_BIN"
-	mkdir -p "$GHCUP_BIN"/../cache
-	curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | BOOTSTRAP_HASKELL_NONINTERACTIVE=1 BOOTSTRAP_HASKELL_MINIMAL=1 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
-	ghcup install ghc --set --isolate="$HOME/.local"     --force "$GHC_VER"
-	ghcup install cabal     --isolate="$HOME/.local/bin" --force "$CABAL_VER"
+	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-${GHC_VER}"
-else
 	GHC="ghc"
 fi

-git describe --all
+git_describe

-ecabal() {
-	cabal "$@"
-}

 # build
 ecabal update

-
 if [ "${RUNNER_OS}" = "Linux" ] ; then
 	if [ "${ARCH}" = "32" ] ; then
-		ecabal build -w "${GHC}" --ghc-options='-split-sections -optl-static' -ftui
+		build_with_cache -w "${GHC}" --ghc-options='-split-sections -optl-static' -ftui --enable-tests
 	elif [ "${ARCH}" = "64" ] ; then
-		ecabal build -w "${GHC}" --ghc-options='-split-sections -optl-static' -ftui
+		build_with_cache -w "${GHC}" --ghc-options='-split-sections -optl-static' -ftui --enable-tests
 	else
-		ecabal build -w "${GHC}" -ftui
+		build_with_cache -w "${GHC}" -ftui --enable-tests
 	fi
 elif [ "${RUNNER_OS}" = "FreeBSD" ] ; then
-	ecabal build -w "${GHC}" --ghc-options='-split-sections' --constraint="zlib +bundled-c-zlib" --constraint="zip +disable-zstd" -ftui
+	build_with_cache -w "${GHC}" --ghc-options='-split-sections' --constraint="zlib +bundled-c-zlib" --constraint="zip +disable-zstd" -ftui --enable-tests
 elif [ "${RUNNER_OS}" = "Windows" ] ; then
-	ecabal build -w "${GHC}" --constraint="zlib +bundled-c-zlib" --constraint="lzma +static"
+	build_with_cache -w "${GHC}" --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" --enable-tests
 else
-	ecabal build -w "${GHC}" --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" -ftui
+	build_with_cache -w "${GHC}" --constraint="zlib +bundled-c-zlib" --constraint="lzma +static" -ftui --enable-tests
 fi

-mkdir out
-binary=$(ecabal new-exec -w "${GHC}" --verbose=0 --offline sh -- -c 'command -v ghcup')
+
+# set up artifacts
+mkdir -p out
+binary=$(cabal list-bin ghcup)
+binary_test=$(cabal list-bin ghcup-test)
 ver=$("${binary}" --numeric-version)
-if [ "${RUNNER_OS}" = "macOS" ] ; then
-	strip "${binary}"
-else
-	if [ "${RUNNER_OS}" != "Windows" ] ; then
-		strip -s "${binary}"
-	fi
-fi
+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"

--- a/.github/scripts/common.sh
+++ b/.github/scripts/common.sh
@@ -0,0 +1,172 @@
+#!/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
+	)
+}
--- a/.github/scripts/hls.sh
+++ b/.github/scripts/hls.sh
@@ -3,35 +3,13 @@
 set -eux

 . .github/scripts/prereq.sh
+. .github/scripts/common.sh

 mkdir -p "$CI_PROJECT_DIR"/.local/bin

 ### build

-ecabal() {
-	cabal "$@"
-}

-raw_eghcup() {
-	"$GHCUP_BIN/ghcup${ext}" -v -c "$@"
-}
-
-eghcup() {
-	if [ "${OS}" = "Windows" ] ; then
-		"$GHCUP_BIN/ghcup${ext}" -v -c -s file:/$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml "$@"
-	else
-		"$GHCUP_BIN/ghcup${ext}" -v -c -s file://$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml "$@"
-	fi
-}
-
-sha_sum() {
-	if [ "${OS}" = "FreeBSD" ] ; then
-		sha256 "$@"
-	else
-		sha256sum "$@"
-	fi
-
-}

 if [ "${OS}" = "Windows" ] ; then
 	GHCUP_DIR="${GHCUP_INSTALL_BASE_PREFIX}"/ghcup
@@ -42,11 +20,6 @@ fi
 rm -rf "${GHCUP_DIR}"
 mkdir -p "${GHCUP_BIN}"

-if [ "${OS}" = "Windows" ] ; then
-	ext=".exe"
-else
-	ext=''
-fi
 ls -lah out
 find out
 cp "out/${ARTIFACT}"-* "$GHCUP_BIN/ghcup${ext}"
@@ -58,18 +31,41 @@ eghcup --version
 sha_sum "$GHCUP_BIN/ghcup${ext}"
 sha_sum "$(raw_eghcup --offline whereis ghcup)"

-git describe --always
+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

-eghcup compile hls -j $(nproc) -g ${HLS_TARGET_VERSION} --ghc ${GHC_VERSION}
+(
+	cd /tmp
+	git clone --depth 1 --branch "${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 whereis hls ${HLS_TARGET_VERSION}) --numeric-version` = "${HLS_TARGET_VERSION}" ] || [ `$(eghcup whereis hls ${HLS_TARGET_VERSION}) --numeric-version | sed 's/.0$//'` = "${HLS_TARGET_VERSION}" ]
+eghcup -v compile hls -j "$(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
--- a/.github/scripts/prereq.sh
+++ b/.github/scripts/prereq.sh
@@ -4,6 +4,7 @@ mkdir -p "$HOME"/.local/bin

 export OS="$RUNNER_OS"
 export PATH="$HOME/.local/bin:$PATH"
+: "${APT_GET:=apt-get}"

 if [ "${RUNNER_OS}" = "Windows" ] ; then
 	# on windows use pwd to get unix style path
@@ -12,6 +13,7 @@ if [ "${RUNNER_OS}" = "Windows" ] ; then
    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"
@@ -23,41 +25,19 @@ fi

 if [ "${RUNNER_OS}" = "Linux" ] ; then
 	if [ "${DISTRO}" = "Alpine" ] ; then
-          apk add --no-cache \
-            curl \
-            gcc \
-            g++ \
-            binutils \
-            binutils-gold \
-            bsd-compat-headers \
-            gmp-dev \
-            ncurses-dev \
-            libffi-dev \
-            make \
-            xz \
-            tar \
-            perl \
-            bash \
-            diffutils \
-            git
-
-          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
+		:
 	elif [ "${DISTRO}" = "Ubuntu" ] ; then
-		sudo apt-get update -y
-		sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev libbz2-dev git wget lsb-release software-properties-common gnupg2 apt-transport-https gcc autoconf automake build-essential
+		export DEBIAN_FRONTEND=noninteractive
+		export TZ=Asia/Singapore
+		if [ "${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
@@ -72,5 +52,15 @@ elif [ "${RUNNER_OS}" = "macOS" ] ; then
 	if ! command -v realpath ; then
 		brew install coreutils
 	fi
+
+    if [ "${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

--- a/.github/scripts/test.sh
+++ b/.github/scripts/test.sh
@@ -3,31 +3,8 @@
 set -eux

 . .github/scripts/prereq.sh
+. .github/scripts/common.sh

-ecabal() {
-	cabal "$@"
-}
-
-raw_eghcup() {
-	"$GHCUP_BIN/ghcup${ext}" -v -c "$@"
-}
-
-eghcup() {
-	if [ "${OS}" = "Windows" ] ; then
-		"$GHCUP_BIN/ghcup${ext}" -v -c -s file:/$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml "$@"
-	else
-		"$GHCUP_BIN/ghcup${ext}" -v -c -s file://$CI_PROJECT_DIR/data/metadata/ghcup-${JSON_VERSION}.yaml "$@"
-	fi
-}
-
-sha_sum() {
-	if [ "${OS}" = "FreeBSD" ] ; then
-		sha256 "$@"
-	else
-		sha256sum "$@"
-	fi
-
-}

 if [ "${OS}" = "Windows" ] ; then
 	GHCUP_DIR="${GHCUP_INSTALL_BASE_PREFIX}"/ghcup
@@ -35,28 +12,26 @@ else
 	GHCUP_DIR="${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup
 fi

-git describe --always
-
+git_describe

 rm -rf "${GHCUP_DIR}"
 mkdir -p "${GHCUP_BIN}"

-if [ "${OS}" = "Windows" ] ; then
-	ext=".exe"
-else
-	ext=''
-fi
-ls -lah out
-find out
 cp "out/${ARTIFACT}"-* "$GHCUP_BIN/ghcup${ext}"
+cp "out/test-${ARTIFACT}"-* "ghcup-test${ext}"
 chmod +x "$GHCUP_BIN/ghcup${ext}"
-echo "$PATH"
+chmod +x "ghcup-test${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
@@ -116,6 +91,10 @@ 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
--- a/.github/workflows/bootstrap.yaml
+++ b/.github/workflows/bootstrap.yaml
@@ -18,7 +18,9 @@ jobs:
      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:
--- a/.github/workflows/cache.yaml
+++ b/.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 }}
--- a/.github/workflows/docker.yaml
+++ b/.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
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -9,17 +9,21 @@ on:
  pull_request:
    branches:
      - master
+  schedule:
+    - cron: '0 2 * * *'

 jobs:
-  build:
-    name: Build binary
+  build-linux:
+    name: Build linux binary
    runs-on: ${{ matrix.os }}
    env:
      CABAL_VER: 3.6.2.0
-      CACHE_VER: 1
-      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: true
      matrix:
        include:
          - os: ubuntu-latest
@@ -30,6 +34,136 @@ jobs:
            ARTIFACT: "x86_64-linux-ghcup"
            GHC_VER: 8.10.7
            ARCH: 64
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+        with:
+          submodules: 'true'
+
+      - if: matrix.ARCH == '32'
+        name: Run build (32 bit linux)
+        uses: docker://hasufell/i386-alpine-haskell:3.12
+        with:
+          args: sh .github/scripts/build.sh
+        env:
+          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:
+          args: sh .github/scripts/build.sh
+        env:
+          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: always()
+        name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: artifacts
+          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
@@ -48,36 +182,17 @@ jobs:
        with:
          submodules: 'true'

-      - if: matrix.ARCH == '32' && runner.os == 'Linux'
-        name: Run build (32 bit linux)
-        uses: docker://i386/alpine:3.12
-        with:
-          args: sh .github/scripts/build.sh
-        env:
-          ARTIFACT: ${{ matrix.ARTIFACT }}
-          ARCH: ${{ matrix.ARCH }}
-          GHC_VER: ${{ matrix.GHC_VER }}
-          DISTRO: Alpine
-
-      - if: matrix.ARCH == '64' && runner.os == 'Linux'
-        name: Run build (64 bit linux)
-        uses: docker://alpine:3.12
-        with:
-          args: sh .github/scripts/build.sh
-        env:
-          ARTIFACT: ${{ matrix.ARTIFACT }}
-          ARCH: ${{ matrix.ARCH }}
-          GHC_VER: ${{ matrix.GHC_VER }}
-          DISTRO: Alpine
-
-      - if: runner.os != 'Linux'
-        name: Run build (windows/mac)
+      - 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
@@ -87,14 +202,13 @@ jobs:
          path: |
            ./out/*

-  test:
-    name: Test
-    needs: build
+
+  test-linux:
+    name: Test linux
+    needs: "build-linux"
    runs-on: ${{ matrix.os }}
    env:
      CABAL_VER: 3.6.2.0
-      CACHE_VER: 1
-      MACOSX_DEPLOYMENT_TARGET: 10.13
      JSON_VERSION: "0.0.7"
    strategy:
      matrix:
@@ -114,6 +228,136 @@ jobs:
            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 build (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 build (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
@@ -129,6 +373,7 @@ jobs:
            GHC_VER: 8.10.7
            ARCH: 64
            DISTRO: na
+
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
@@ -140,48 +385,33 @@ jobs:
          name: artifacts
          path: ./out

-      - if: matrix.ARCH == '32' && runner.os == 'Linux' && matrix.DISTRO == 'Alpine'
-        name: Run build (32 bit linux Alpine)
-        uses: docker://i386/alpine: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' && runner.os == 'Linux' && matrix.DISTRO == 'Alpine'
-        name: Run build (64 bit linux Alpine)
-        uses: docker://alpine: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: runner.os == 'Linux' && matrix.DISTRO != 'Alpine'
-        name: Run build (64 bit linux)
-        run: sh .github/scripts/test.sh
-        env:
-          ARTIFACT: ${{ matrix.ARTIFACT }}
-          ARCH: ${{ matrix.ARCH }}
-          GHC_VER: ${{ matrix.GHC_VER }}
-          DISTRO: ${{ matrix.DISTRO }}
-
-      - if: runner.os != 'Linux'
-        name: Run build (windows/mac)
+      - 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
+    needs: build-linux
    runs-on: ubuntu-latest
    env:
      GHC_VERSION: "8.10.7"
@@ -190,6 +420,10 @@ jobs:
      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
@@ -203,10 +437,12 @@ jobs:

      - name: Run hls build
        run: sh .github/scripts/hls.sh
+        env:
+          APT_GET: "sudo apt-get"

  release:
    name: release
-    needs: [build, test, hls]
+    needs: ["test-linux", "test-arm", "test-macwin", "hls"]
    runs-on: ubuntu-latest
    if: startsWith(github.ref, 'refs/tags/v')
    steps:
--- a/app/ghcup/BrickMain.hs
+++ b/app/ghcup/BrickMain.hs
@@ -13,6 +13,7 @@ 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
@@ -433,6 +434,7 @@ install' _ (_, ListResult {..}) = do
              , BuildFailed
              , TagNotFound
              , DigestError
+              , ContentLengthError
              , GPGError
              , DownloadFailed
              , DirNotEmpty
@@ -554,6 +556,7 @@ del' _ (_, ListResult {..}) = do
    )
    >>= \case
          VRight vi -> do
+            logGHCPostRm (mkTVer lVer)
            forM_ (_viPostRemove =<< vi) $ \msg ->
              logInfo msg
            pure $ Right ()
@@ -630,7 +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
--- a/app/ghcup/GHCup/OptParse/Common.hs
+++ b/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
@@ -64,6 +65,7 @@ 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


    -------------
@@ -789,3 +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
+
--- a/app/ghcup/GHCup/OptParse/Compile.hs
+++ b/app/ghcup/GHCup/OptParse/Compile.hs
@@ -420,6 +420,7 @@ hlsCompileOpts =
 type GHCEffects = '[ AlreadyInstalled
                  , BuildFailed
                  , DigestError
+                  , ContentLengthError
                  , GPGError
                  , DownloadFailed
                  , GHCupSetError
@@ -443,6 +444,7 @@ type GHCEffects = '[ AlreadyInstalled
 type HLSEffects = '[ AlreadyInstalled
                  , BuildFailed
                  , DigestError
+                  , ContentLengthError
                  , GPGError
                  , DownloadFailed
                  , GHCupSetError
--- a/app/ghcup/GHCup/OptParse/Config.hs
+++ b/app/ghcup/GHCup/OptParse/Config.hs
@@ -188,9 +188,15 @@ 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 ()
--- a/app/ghcup/GHCup/OptParse/Install.hs
+++ b/app/ghcup/GHCup/OptParse/Install.hs
@@ -243,6 +243,7 @@ type InstallEffects = '[ AlreadyInstalled
                       , BuildFailed
                       , TagNotFound
                       , DigestError
+                       , ContentLengthError
                       , GPGError
                       , DownloadFailed
                       , TarDirDoesNotExist
@@ -271,6 +272,7 @@ type InstallGHCEffects = '[ AlreadyInstalled
                          , BuildFailed
                          , CopyError
                          , DigestError
+                          , ContentLengthError
                          , DirNotEmpty
                          , DownloadFailed
                          , FileAlreadyExistsError
@@ -332,7 +334,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
         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
@@ -402,7 +404,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
         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 +454,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
           (_tvVersion -> v, vi) <- liftE $ fromVersion instVer HLS
           -- TODO: support legacy
           liftE $ runBothE' (installHLSBindist
-                                      (DownloadInfo uri (Just $ RegexDir "haskell-language-server-*") "")
+                                      (DownloadInfo uri (Just $ RegexDir "haskell-language-server-*") "" Nothing)
                                      v
                                      (maybe GHCupInternal IsolateDir isolateDir)
                                      forceInstall
@@ -501,7 +503,7 @@ install installCommand settings getAppState' runLogger = case installCommand of
          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
--- a/app/ghcup/GHCup/OptParse/Prefetch.hs
+++ b/app/ghcup/GHCup/OptParse/Prefetch.hs
@@ -153,6 +153,7 @@ type PrefetchEffects = '[ TagNotFound
                        , NoToolVersionSet
                        , NoDownload
                        , DigestError
+                        , ContentLengthError
                        , GPGError
                        , DownloadFailed
                        , JSONError
--- a/app/ghcup/GHCup/OptParse/Rm.hs
+++ b/app/ghcup/GHCup/OptParse/Rm.hs
@@ -175,8 +175,8 @@ rm rmCommand runAppState runLogger = case rmCommand of
      )
      >>= \case
            VRight vi -> do
-              forM_ (_viPostRemove =<< vi) $ \msg ->
-                runLogger $ logInfo msg
+              runLogger $ logGHCPostRm ghcVer
+              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 ->
-                runLogger $ logInfo msg
+              postRmLog vi
              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 ->
-                runLogger $ logInfo msg
+              postRmLog vi
              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 ->
-                runLogger $ logInfo msg
+              postRmLog vi
              pure ExitSuccess
            VLeft  e -> do
              runLogger $ logError $ T.pack $ prettyShow e
              pure $ ExitFailure 15

+  postRmLog vi =
+    forM_ (_viPostRemove =<< vi) $ \msg ->
+      runLogger $ logInfo msg
--- a/app/ghcup/GHCup/OptParse/Run.hs
+++ b/app/ghcup/GHCup/OptParse/Run.hs
@@ -177,6 +177,7 @@ type RunEffects = '[ AlreadyInstalled
                   , BuildFailed
                   , TagNotFound
                   , DigestError
+                   , ContentLengthError
                   , GPGError
                   , DownloadFailed
                   , TarDirDoesNotExist
@@ -343,6 +344,7 @@ run RunOptions{..} runAppState leanAppstate runLogger = do
                              , DownloadFailed
                              , DirNotEmpty
                              , DigestError
+                              , ContentLengthError
                              , BuildFailed
                              , ArchiveResult
                              , AlreadyInstalled
--- a/app/ghcup/GHCup/OptParse/Upgrade.hs
+++ b/app/ghcup/GHCup/OptParse/Upgrade.hs
@@ -88,6 +88,7 @@ upgradeOptsP =


 type UpgradeEffects = '[ DigestError
+                       , ContentLengthError
                       , GPGError
                       , NoDownload
                       , NoUpdate
--- a/app/ghcup/Main.hs
+++ b/app/ghcup/Main.hs
@@ -161,7 +161,7 @@ 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)
@@ -210,7 +210,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]

                ghcupInfo <-
                  ( flip runReaderT leanAppstate
-                    . runE @'[DigestError, GPGError, JSONError , DownloadFailed, FileDoesNotExistError]
+                    . runE @'[DigestError, ContentLengthError, GPGError, JSONError , DownloadFailed, FileDoesNotExistError]
                    $ liftE getDownloadsF
                    )
                    >>= \case
@@ -253,7 +253,7 @@ 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
--- a/cbits/dirutils.h
+++ b/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>
--- a/docker/alpine32/Dockerfile
+++ b/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
+
--- a/docker/alpine64/Dockerfile
+++ b/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
+
--- a/docker/arm32v7/Dockerfile
+++ b/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"]
--- a/docker/arm32v7/update_opt.sh
+++ b/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}"
--- a/docker/arm64v8/Dockerfile
+++ b/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"]
--- a/docker/arm64v8/update_opt.sh
+++ b/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}"
--- a/docs/about.md
+++ b/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 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 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://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
--- a/docs/dev.md
+++ b/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

--- a/docs/guide.md
+++ b/docs/guide.md
@@ -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)
@@ -67,7 +67,7 @@ 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.

@@ -97,6 +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.
@@ -147,7 +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:
@@ -198,15 +202,59 @@ 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://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell#L7)
+* [bootstrap-haskell](https://github.com/haskell/ghcup-hs/blob/master/scripts/bootstrap/bootstrap-haskell#L7)
  for Unix-like operating systems
-* [bootstrap-haskell.ps1](https://gitlab.haskell.org/haskell/ghcup-hs/-/blob/master/scripts/bootstrap/bootstrap-haskell.ps1#L17)
+* [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).

@@ -270,7 +318,7 @@ Compiling from source is supported for both source tarballs and arbitrary git re
 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).

@@ -383,9 +431,11 @@ 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
@@ -467,11 +517,11 @@ to download ghcup.

 There are two known workarounds:

-1. Tell curl to ignore certificate errors (dangerous): `curl -k https://gitlab.haskell.org/haskell/ghcup-hs/-/raw/master/scripts/bootstrap/bootstrap-haskell | GHCUP_CURL_OPTS="-k" sh`
-2. Try to use wget instead: `wget -O /dev/stdout https://gitlab.haskell.org/haskell/ghcup-hs/-/raw/master/scripts/bootstrap/bootstrap-haskell | BOOTSTRAP_HASKELL_DOWNLOADER=wget sh`
+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;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
+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 $_ }
 ```
--- a/docs/index.md
+++ b/docs/index.md
@@ -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>

@@ -45,13 +45,13 @@ 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>
@@ -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>
--- a/docs/install.md
+++ b/docs/install.md
@@ -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?

@@ -48,6 +48,10 @@ The following distro packages are required: `build-essential curl libffi-dev lib

 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`
@@ -56,6 +60,10 @@ The following distro packages are required: `gcc gcc-c++ gmp gmp-devel make ncur

 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.
@@ -260,7 +268,7 @@ On Linux, some users have reported an issue when VSCode is not launched from a t
 ## 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)

--- a/docs/steps.md
+++ b/docs/steps.md
@@ -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)
--- a/ghcup.cabal
+++ b/ghcup.cabal
@@ -6,8 +6,8 @@ license-file:       LICENSE
 copyright:          Julian Ospald 2020
 maintainer:         hasufell@posteo.de
 author:             Julian Ospald
-homepage:           https://gitlab.haskell.org/haskell/ghcup-hs
-bug-reports:        https://gitlab.haskell.org/haskell/ghcup-hs/issues
+homepage:           https://github.com/haskell/ghcup-hs
+bug-reports:        https://github.com/haskell/ghcup-hs/issues/
 synopsis:           ghc toolchain installer
 description:
  A rewrite of the shell script ghcup, for providing
@@ -25,11 +25,14 @@ extra-source-files:
  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:
@@ -180,9 +183,10 @@ library
    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

    include-dirs:     cbits
    includes:         dirutils.h
@@ -243,6 +247,7 @@ executable ghcup
    , base                  >=4.12     && <5
    , 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
@@ -301,6 +306,7 @@ test-suite ghcup-test
    GHCup.ArbitraryTypes
    GHCup.Types.JSONSpec
    GHCup.Utils.FileSpec
+    GHCup.Prelude.File.Posix.TraversalsSpec
    Spec

  default-language:   Haskell2010
@@ -324,7 +330,7 @@ test-suite ghcup-test
    , filepath                  ^>=1.4.2.1
    , 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
@@ -332,3 +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
--- a/lib/GHCup.hs
+++ b/lib/GHCup.hs
@@ -106,6 +106,7 @@ fetchToolBindist :: ( MonadFail m
                 -> Maybe FilePath
                 -> Excepts
                      '[ DigestError
+                       , ContentLengthError
                       , GPGError
                       , DownloadFailed
                       , NoDownload
@@ -288,6 +289,7 @@ upgradeGHCup :: ( MonadMask m
             -> Excepts
                  '[ CopyError
                   , DigestError
+                   , ContentLengthError
                   , GPGError
                   , GPGError
                   , DownloadFailed
@@ -308,7 +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
--- a/lib/GHCup/Cabal.hs
+++ b/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
--- a/lib/GHCup/Download.hs
+++ b/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
@@ -162,7 +162,7 @@ getBase :: ( MonadReader env m
           , MonadMask m
           )
        => URI
-        -> Excepts '[GPGError, DigestError, JSONError, FileDoesNotExistError] m GHCupInfo
+        -> Excepts '[GPGError, DigestError, ContentLengthError, JSONError, FileDoesNotExistError] m GHCupInfo
 getBase uri = do
  Settings { noNetwork, downloader } <- lift getSettings

@@ -184,7 +184,7 @@ 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 +229,7 @@ getBase uri = do
          -> Excepts
               '[ DownloadFailed
                , DigestError
+                , ContentLengthError
                , GPGError
                ]
               m1
@@ -242,7 +243,7 @@ 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 +259,7 @@ 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
@@ -324,16 +325,18 @@ 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
-download uri gpgUri eDigest dest mfn etags
-  | scheme == "https" = dl
-  | scheme == "http"  = dl
+         -> Excepts '[DigestError, ContentLengthError, DownloadFailed, GPGError] m FilePath
+download uri gpgUri eDigest eCSize dest mfn etags
+  | scheme == "https" = liftE dl
+  | scheme == "http"  = liftE dl
  | scheme == "file"  = do
      let destFile' = T.unpack . decUTF8Safe $ view pathL' uri
      lift $ logDebug $ "using local file: " <> T.pack destFile'
+      forM_ eCSize  (liftE . flip checkCSize  destFile')
      forM_ eDigest (liftE . flip checkDigest destFile')
      pure destFile'
  | otherwise = throwE $ DownloadFailed (variantFromValue UnsupportedScheme)
@@ -351,7 +354,7 @@ 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 +404,37 @@ 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)
-              => [String] -> FilePath -> URI -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
+  curlEtagsDL :: ( MonadReader env m
+                 , HasLog env
+                 , MonadCatch m
+                 , MonadMask m
+                 , MonadIO m
+                 )
+              => [String]
+              -> FilePath
+              -> URI
+              -> Excepts '[ProcessError, DownloadFailed, UnsupportedScheme] m ()
  curlEtagsDL o' destFile (decUTF8Safe . serializeURIRef' -> uri') = do
    let destFileTemp = tmpFile destFile
    dh <- liftIO $ emptySystemTempFile "curl-header"
@@ -423,6 +444,7 @@ download uri gpgUri eDigest dest mfn etags
        liftE $ lEM @_ @'[ProcessError] $ exec "curl"
            (o' ++ (if etags then ["--dump-header", dh] else [])
                ++ maybe [] (\t -> ["-H", "If-None-Match: " <> T.unpack t]) metag
+                ++ maybe [] (\s -> ["--max-file-size", show s]) eCSize
                ++ ["-fL", "-o", destFileTemp, T.unpack uri']) Nothing Nothing
        headers <- liftIO $ T.readFile dh

@@ -440,7 +462,14 @@ 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 +478,12 @@ 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 +505,10 @@ 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 +518,16 @@ 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 +539,7 @@ 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 +547,7 @@ 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 +616,14 @@ 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 +638,7 @@ 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 +647,10 @@ 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 +681,25 @@ 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]
--- a/lib/GHCup/Download/IOStreams.hs
+++ b/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
-              Right (r', _) -> r'
-            Nothing -> 0
+              Left  _       -> Nothing
+              Right (r', _) -> Just r'
+            Nothing -> Nothing

-      (mpb :: Maybe (ProgressBar ())) <- if progressBar
-        then Just <$> newProgressBar defStyle 10 (Progress 0 size ())
-        else pure Nothing
+      forM_ size $ \s -> forM_ eCSize $ \es -> when (es /= s) $ throwIO (ContentLengthError Nothing (Just s) es)
+      let size' = eCSize <|> size
+
+      (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 ()
        )
--- a/lib/GHCup/Errors.hs
+++ b/lib/GHCup/Errors.hs
@@ -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)

--- a/lib/GHCup/GHC.hs
+++ b/lib/GHCup/GHC.hs
@@ -109,6 +109,7 @@ fetchGHCSrc :: ( MonadFail m
            -> Maybe FilePath
            -> Excepts
                 '[ DigestError
+                  , ContentLengthError
                  , GPGError
                  , DownloadFailed
                  , NoDownload
@@ -152,6 +153,7 @@ installGHCBindist :: ( MonadFail m
                       '[ AlreadyInstalled
                        , BuildFailed
                        , DigestError
+                        , ContentLengthError
                        , GPGError
                        , DownloadFailed
                        , NoDownload
@@ -357,6 +359,7 @@ installGHCBin :: ( MonadFail m
                   '[ AlreadyInstalled
                    , BuildFailed
                    , DigestError
+                    , ContentLengthError
                    , GPGError
                    , DownloadFailed
                    , NoDownload
@@ -628,6 +631,7 @@ compileGHC :: ( MonadMask m
                '[ AlreadyInstalled
                 , BuildFailed
                 , DigestError
+                 , ContentLengthError
                 , GPGError
                 , DownloadFailed
                 , GHCupSetError
@@ -676,7 +680,7 @@ 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)
@@ -684,7 +688,7 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
        -- download source tarball
        tmpDownload <- lift withGHCupTmpDir
        tmpUnpack <- lift mkGhcupTmpDir
-        tar <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpDownload) Nothing False
+        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
@@ -694,18 +698,19 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
                           execBlank
                           regex
            )
-          tver <- liftE $ getGHCVer (appendGHCupPath tmpUnpack (takeDirectory bootFile))
+          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)
+        pure (workdir, tmpUnpack, mkTVer <$> tver)

      -- clone from git
      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" ]
@@ -715,7 +720,7 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
                    , fromString rep ]

          -- figure out if we can do a shallow clone
-          remoteBranches <- catchE @ProcessError @'[PatchFailed, ProcessError, NotFoundInPATH, DigestError, DownloadFailed, GPGError] @'[PatchFailed, NotFoundInPATH, DigestError, DownloadFailed, GPGError] (\(_ :: ProcessError) -> pure [])
+          remoteBranches <- catchE @ProcessError @'[PatchFailed, ProcessError, NotFoundInPATH, DigestError, ContentLengthError, DownloadFailed, GPGError] @'[PatchFailed, NotFoundInPATH, DigestError, DownloadFailed, GPGError] (\(_ :: ProcessError) -> pure [])
              $ fmap processBranches $ gitOut ["ls-remote", "--heads", "origin"] (fromGHCupPath tmpUnpack)
          let shallow_clone
                | isCommitHash ref                     = True
@@ -745,20 +750,23 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
          liftE $ applyAnyPatch patches (fromGHCupPath tmpUnpack)

          -- bootstrap
-          tver <- liftE $ getGHCVer tmpUnpack
+          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): " <> prettyVer tver <>
+                           "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 tver

-        pure (tmpUnpack, tmpUnpack, GHCTargetVersion Nothing 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)
@@ -781,8 +789,10 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
      tmpUnpack
      (do
        b <- if hadrian
-             then compileHadrianBindist tver (fromGHCupPath workdir) ghcdir
-             else compileMakeBindist tver (fromGHCupPath workdir) ghcdir
+             -- prefer 'tver', because the real version carries out compatibility checks
+             -- 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)
      )
@@ -826,14 +836,14 @@ compileGHC targetGhc ov bstrap jobs mbuildConfig patches aargs buildFlavour hadr
               , MonadThrow m
               )
            => GHCupPath
-            -> Excepts '[ProcessError] m Version
+            -> 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 -> throwEither . MP.parse ghcProjectVersion "" . T.pack . stripNewlineEnd . T.unpack . decUTF8Safe' $ _stdOut
+      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 =
--- a/lib/GHCup/HLS.hs
+++ b/lib/GHCup/HLS.hs
@@ -105,6 +105,7 @@ installHLSBindist :: ( MonadMask m
                       '[ AlreadyInstalled
                        , CopyError
                        , DigestError
+                        , ContentLengthError
                        , GPGError
                        , DownloadFailed
                        , NoDownload
@@ -297,6 +298,7 @@ installHLSBin :: ( MonadMask m
                   '[ AlreadyInstalled
                    , CopyError
                    , DigestError
+                    , ContentLengthError
                    , GPGError
                    , DownloadFailed
                    , NoDownload
@@ -344,6 +346,7 @@ compileHLS :: ( MonadMask m
                       , GPGError
                       , DownloadFailed
                       , DigestError
+                       , ContentLengthError
                       , UnknownArchive
                       , TarDirDoesNotExist
                       , ArchiveResult
@@ -401,7 +404,7 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
      -- download source tarball
      tmpDownload <- lift withGHCupTmpDir
      tmpUnpack <- lift mkGhcupTmpDir
-      tar <- liftE $ download uri Nothing Nothing (fromGHCupPath tmpDownload) Nothing False
+      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
@@ -481,7 +484,7 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda

  liftE $ runBuildAction
    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

@@ -497,7 +500,7 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
          | otherwise -> pure (takeFileName cp)
        Just (Right uri) -> do
          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
@@ -511,7 +514,7 @@ compileHLS targetHLS ghcs jobs ov installDir cabalProject cabalProjectLocal upda
          | otherwise -> pure "cabal.project"
      forM_ cabalProjectLocal $ \uri -> do
        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)
--- a/lib/GHCup/Prelude/File/Posix/Traversals.hs
+++ b/lib/GHCup/Prelude/File/Posix/Traversals.hs
@@ -36,8 +36,8 @@ import System.Posix.Internals (peekFilePath)
 ----------------------------------------------------------
 -- dodgy stuff

-type CDir = ()
-type CDirent = ()
+data {-# CTYPE "DIR" #-} CDir
+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

 ----------------------------------------------------------
--- a/lib/GHCup/Stack.hs
+++ b/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
--- a/lib/GHCup/Types.hs
+++ b/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)

--- a/lib/GHCup/Utils.hs
+++ b/lib/GHCup/Utils.hs
@@ -1035,13 +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


@@ -1172,7 +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
@@ -1184,8 +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
-        ) `catchE` liftE @'[GPGError, DigestError , DownloadFailed] dl
+          liftE @'[GPGError, DigestError, ContentLengthError, DownloadFailed] $ dl
+        ) `catchE` liftE @'[GPGError, DigestError, ContentLengthError, DownloadFailed] dl
  | otherwise = pure ()


@@ -1270,11 +1270,13 @@ warnAboutHlsCompatibility = do
  case (currentGHC, currentHLS) of
    (Just gv, Just hv) | gv `notElem` supportedGHC -> do
      logWarn $
-        "GHC " <> T.pack (prettyShow gv) <> " is not compatible with " <>
-        "Haskell Language Server " <> T.pack (prettyShow hv) <> "." <> "\n" <>
-        "Haskell IDE support may not work until this is fixed." <> "\n" <>
-        "Install a different HLS version, or install and set one of the following GHCs:" <> "\n" <>
-        T.pack (prettyShow supportedGHC)
+        "GHC-" <> T.pack (prettyShow gv) <> " appears to have no corresponding HLS-" <> T.pack (prettyShow hv) <> " binary." <> "\n" <>
+        "Haskell IDE support may not work." <> "\n" <>
+        "You can try to either: " <> "\n" <>
+        "  1. Install a different HLS version (e.g. downgrade for older GHCs)" <> "\n" <>
+        "  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 ()

--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -4,7 +4,7 @@ site_description: GHCup is the main installer for the general purpose language H
 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
--- a/scripts/bootstrap/bootstrap-haskell
+++ b/scripts/bootstrap/bootstrap-haskell
@@ -287,7 +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 "${arch}" in
--- a/scripts/bootstrap/bootstrap-haskell.ps1
+++ b/scripts/bootstrap/bootstrap-haskell.ps1
@@ -38,9 +38,13 @@ param (
    # Specify the cabal root directory (default: '$InstallDir\cabal')
    [string]$CabalDir,
    # Whether to disable use of curl.exe
-    [switch]$DisableCurl
+    [switch]$DisableCurl,
+    # The Msys2 version to download (e.g. 20221216)
+    [string]$Msys2Version
 )

+$DefaultMsys2Version = "20221216"
+
 $Silent = !$Interactive

 function Print-Msg {
@@ -423,12 +427,15 @@ if (!(Test-Path -Path ('{0}' -f $MsysDir))) {
 	Start-Sleep -s 5

    # Download the archive
-    Print-Msg -msg 'Downloading Msys2 archive...'
-    $archive = 'msys2-x86_64-latest.sfx.exe'
+	if (!($Msys2Version)) {
+		$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) -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 $archive) -destinationFolder ([IO.Path]::GetTempPath()) -includeStats
    }
@@ -603,7 +610,7 @@ if ($DisableCurl) {
 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' '-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, $DownloadScript)
+  Exec "$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)
 }


--- a/test/GHCup/Prelude/File/Posix/TraversalsSpec.hs
+++ b/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
--- a/test/GHCup/Types/JSONSpec.hs
+++ b/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"

--- a/test/data/dir/.keep
+++ b/test/data/dir/.keep
--- a/test/data/file
+++ b/test/data/file
--- a/test/golden/unix/GHCupInfo.json
+++ b/test/golden/unix/GHCupInfo.json
--- a/test/golden/windows/GHCupInfo.json
+++ b/test/golden/windows/GHCupInfo.json
Author	SHA1	Message	Date
Julian Ospald	82e3837dd9	Update windows golden test file	2023-01-02 21:42:52 +08:00
Julian Ospald	957c5918b8	Upload golden files on failure	2023-01-02 20:47:49 +08:00
Julian Ospald	9d4c923649	Add content-length property to downloads This is optional for now. Fixes #367	2023-01-02 20:41:42 +08:00
Julian Ospald	d1075987de	Fix ARM cleanup	2023-01-02 20:35:46 +08:00
Julian Ospald	801b1edfa7	Merge remote-tracking branch 'origin/pr/730'	2022-12-31 21:10:59 +08:00
Julian Ospald	c1b67e1787	Merge branch 'issue-433'	2022-12-27 00:11:23 +08:00
Julian Ospald	70dd106549	Merge branch 'issue-708'	2022-12-27 00:10:41 +08:00
Julian Ospald	b098aa4e65	Merge branch 'issue-368'	2022-12-27 00:09:59 +08:00
Julian Ospald	74b784fcfb	Merge branch 'issue-391-gh'	2022-12-27 00:09:39 +08:00
Julian Ospald	673db344d6	Merge branch 'issue-414'	2022-12-27 00:09:28 +08:00
Julian Ospald	5594a19c02	Merge branch 'issue-384'	2022-12-27 00:09:05 +08:00
Kristoffer Grundström	a5bc13fe50	Added Mageia Signed-off-by: Kristoffer Grundström <lovaren@gmail.com>	2022-12-25 08:02:41 +01:00
Julian Ospald	a5f2067d76	Improve stripping logic	2022-12-21 13:44:31 +08:00
Julian Ospald	be8fa57be1	Freeze the MSYS2 version we install Fixes #368	2022-12-20 23:38:48 +08:00
Julian Ospald	6ad9963889	Allow building newer GHCs from git The user will have to pass --overwrite-version=<ver> because we can't discover the GHC version from git anymore. https://gitlab.haskell.org/ghc/ghc/-/issues/22322	2022-12-20 23:18:44 +08:00
Julian Ospald	bcddb05b1d	Fix bootstrap under windows when msys2 has non-posix login shell	2022-12-20 22:46:58 +08:00
Julian Ospald	f7d2033e25	Improve postRm message, fixes #384	2022-12-20 22:20:10 +08:00
Julian Ospald	6ce7649cfe	Improve upgrade warning wrt #414	2022-12-20 21:49:26 +08:00
Julian Ospald	cb0d8b80c3	Merge branch 'retry-cache'	2022-12-20 15:41:25 +08:00
Julian Ospald	95869f9560	Improve CI	2022-12-20 14:00:26 +08:00
Julian Ospald	e8586cf993	Improve add-release-channel, fixes #708	2022-12-20 00:57:56 +08:00
Julian Ospald	d195a3f86c	Merge branch 'issue-706'	2022-12-19 02:03:47 +08:00
Julian Ospald	b171afa09d	Document GHCUP_MSYS2, fixes #427	2022-12-19 00:52:11 +08:00
Julian Ospald	5cf49bffac	Improve warning for incompatible HLS/GHC combos	2022-12-19 00:40:07 +08:00
Julian Ospald	5659de8516	Improve hyperlinks	2022-12-19 00:16:48 +08:00
Julian Ospald	0cd2b6d549	Improve documentation on stack hooks	2022-12-19 00:10:49 +08:00
Julian Ospald	ae092de4b6	Update CI	2022-12-18 22:00:33 +08:00
Julian Ospald	a7e6e7c27d	Merge branch 'cirrus'	2022-12-16 19:12:49 +08:00
Julian Ospald	175a301a0d	Cirrus CI	2022-12-16 18:25:17 +08:00
Julian Ospald	823458910b	Merge branch 'armv7-aarch64'	2022-12-11 22:12:49 +08:00
Julian Ospald	2abcb46199	Fix ARM etc	2022-12-11 22:11:58 +08:00
Julian Ospald	75b891147a	Add packages for VoidLinux	2022-12-03 17:22:03 +08:00
Julian Ospald	de208f004e	Make sure powershell installation snippet doesn't crash parent shell Fixes #418	2022-12-03 16:29:01 +08:00
Julian Ospald	ecb0676fea	Merge branch 'cleanup-docs'	2022-12-03 15:29:47 +08:00
Julian Ospald	957867ff1c	Fix remaining gitlab links wrt #692	2022-11-22 19:06:12 +08:00