Lala

also, use nubOrd for linearithmic instead of quadratic complexity

.gitignore

@@ -12,3 +12,4 @@ tags
 TAGS
 /tmp/
 .entangled
+release/

.gitlab-ci.yml

@@ -14,9 +14,10 @@ variables:
     - x86_64-linux
   variables:
     OS: "LINUX"
+    BIT: "64"
 
 .alpine:64bit:
-  image: "alpine:edge"
+  image: "alpine:3.12"
   tags:
     - x86_64-linux
   variables:
@@ -24,7 +25,7 @@ variables:
     BIT: "64"
 
 .alpine:32bit:
-  image: "i386/alpine:edge"
+  image: "i386/alpine:3.12"
   tags:
     - x86_64-linux
   variables:
@@ -36,12 +37,14 @@ variables:
     - x86_64-darwin
   variables:
     OS: "DARWIN"
+    BIT: "64"
 
 .freebsd:
   tags:
     - x86_64-freebsd
   variables:
     OS: "FREEBSD"
+    BIT: "64"
 
 .root_cleanup:
   after_script:
@@ -57,7 +60,12 @@ variables:
   script:
     - ./.gitlab/script/ghcup_version.sh
   variables:
-    JSON_VERSION: "0.0.2"
+    JSON_VERSION: "0.0.4"
+  artifacts:
+    expire_in: 2 week
+    paths:
+      - golden
+    when: on_failure
 
 .test_ghcup_version:linux:
   extends:
@@ -66,6 +74,13 @@ variables:
   before_script:
     - ./.gitlab/before_script/linux/install_deps.sh
 
+.test_ghcup_version:linux32:
+  extends:
+    - .test_ghcup_version
+    - .alpine:32bit
+  before_script:
+    - ./.gitlab/before_script/linux/alpine/install_deps.sh
+
 .test_ghcup_version:darwin:
   extends:
     - .test_ghcup_version
@@ -92,35 +107,65 @@ variables:
   only:
     - tags
 
+######## stack test ########
+
+test:linux:stack:
+  before_script:
+    - ./.gitlab/before_script/linux/install_deps_minimal.sh
+  script:
+    - ./.gitlab/script/ghcup_stack.sh
+  extends:
+    - .debian
+
+######## bootstrap test ########
+
+test:linux:bootstrap_script:
+  before_script:
+    - ./.gitlab/before_script/linux/install_deps_minimal.sh
+  script:
+    - ./.gitlab/script/ghcup_bootstrap.sh
+  variables:
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
+  extends:
+    - .debian
+
 ######## linux test ########
 
 test:linux:recommended:
   extends: .test_ghcup_version:linux
   variables:
-    GHC_VERSION: "8.8.4"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
 
 test:linux:latest:
   extends: .test_ghcup_version:linux
   variables:
-    GHC_VERSION: "8.10.1"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
   allow_failure: true
 
+######## linux 32bit test ########
+
+test:linux:recommended:32bit:
+  extends: .test_ghcup_version:linux32
+  variables:
+    GHC_VERSION: "8.10.2"
+    CABAL_VERSION: "3.2.0.0"
 
 ######## darwin test ########
 
 test:mac:recommended:
   extends: .test_ghcup_version:darwin
   variables:
-    GHC_VERSION: "8.8.4"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
 
 test:mac:latest:
   extends: .test_ghcup_version:darwin
   variables:
-    GHC_VERSION: "8.10.1"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
   allow_failure: true
 
 
@@ -129,14 +174,14 @@ test:mac:latest:
 test:freebsd:recommended:
   extends: .test_ghcup_version:freebsd
   variables:
-    GHC_VERSION: "8.8.4"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
 
 test:freebsd:latest:
   extends: .test_ghcup_version:freebsd
   variables:
-    GHC_VERSION: "8.10.1"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
   allow_failure: true
 
 
@@ -150,8 +195,8 @@ release:linux:64bit:
     - ./.gitlab/before_script/linux/alpine/install_deps.sh
   variables:
     ARTIFACT: "x86_64-linux-ghcup"
-    GHC_VERSION: "8.8.4"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
 
 
 release:linux:32bit:
@@ -162,7 +207,7 @@ release:linux:32bit:
     - ./.gitlab/before_script/linux/alpine/install_deps.sh
   variables:
     ARTIFACT: "i386-linux-ghcup"
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.10.2"
     CABAL_VERSION: "3.2.0.0"
 
 
@@ -177,8 +222,8 @@ release:darwin:
     - ./.gitlab/before_script/darwin/install_deps.sh
   variables:
     ARTIFACT: "x86_64-apple-darwin-ghcup"
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
     MACOSX_DEPLOYMENT_TARGET: "10.7"
 
 
@@ -193,6 +238,6 @@ release:freebsd:
     - ./.gitlab/before_script/freebsd/install_deps.sh
   variables:
     ARTIFACT: "x86_64-portbld-freebsd-ghcup"
-    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"
+    GHC_VERSION: "8.10.3"
+    CABAL_VERSION: "3.4.0.0-rc4"
 

.gitlab/before_script/linux/alpine/install_deps.sh

@@ -18,10 +18,6 @@ apk add --no-cache \
 	tar \
 	perl
 
-ln -sf libncurses.so /usr/lib/libtinfo.so
-ln -sf libncursesw.so.6 /usr/lib/libtinfow.so.6
-ln -sf libtinfow.so.6 /usr/lib/libtinfow.so
-
 if [ "${BIT}" = "32" ] ; then
 	curl -sSfL https://downloads.haskell.org/ghcup/i386-linux-ghcup > ./ghcup-bin
 else
@@ -49,5 +45,3 @@ apk add --no-cache \
 	xz-dev \
 	ncurses-static
 
-ln -sf libncursesw.a /usr/lib/libtinfow.a
-

.gitlab/before_script/linux/install_deps_minimal.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+set -eux
+
+. "$( cd "$(dirname "$0")" ; pwd -P )/../../ghcup_env"
+
+mkdir -p "${TMPDIR}"
+
+sudo apt-get update -y
+sudo apt-get install -y libnuma-dev zlib1g-dev libgmp-dev libgmp10 libssl-dev liblzma-dev git wget

.gitlab/script/ghcup_bootstrap.sh

@@ -0,0 +1,30 @@
+#!/bin/sh
+
+set -eux
+
+. "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup_env"
+
+mkdir -p "$CI_PROJECT_DIR"/.local/bin
+
+ecabal() {
+	cabal --store-dir="$(pwd)"/.store "$@"
+}
+
+eghcup() {
+	ghcup -v -c -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml "$@"
+}
+
+git describe --always
+
+### build
+
+ecabal update
+
+export BOOTSTRAP_HASKELL_NONINTERACTIVE=yes
+export BOOTSTRAP_HASKELL_GHC_VERSION=$GHC_VERSION
+export BOOTSTRAP_HASKELL_CABAL_VERSION=$CABAL_VERSION
+
+./bootstrap-haskell
+
+[ "$(ghc --numeric-version)" = "${GHC_VERSION}" ]
+

.gitlab/script/ghcup_release.sh

@@ -22,9 +22,9 @@ if [ "${OS}" = "LINUX" ] ; then
 		ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections -optl-static' -ftui
 	fi
 elif [ "${OS}" = "FREEBSD" ] ; then
-	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections' --constraint="zlib static" -ftui
+	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections' --constraint="zlib +static" -ftui
 else
-	ecabal build -w ghc-${GHC_VERSION} --constraint="zlib static" --constraint="lzma static" -ftui
+	ecabal build -w ghc-${GHC_VERSION} --constraint="zlib +static" --constraint="lzma +static" -ftui
 fi
 
 mkdir out

.gitlab/script/ghcup_stack.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -eux
+
+. "$( cd "$(dirname "$0")" ; pwd -P )/../ghcup_env"
+
+mkdir -p "$CI_PROJECT_DIR"/.local/bin
+
+git describe --always
+
+### build
+
+curl -L -O https://get.haskellstack.org/stable/linux-x86_64.tar.gz
+tar xf linux-x86_64.tar.gz
+cp stack-*-linux-*/stack "$CI_PROJECT_DIR"/.local/bin/stack
+chmod +x "$CI_PROJECT_DIR"/.local/bin/stack
+
+mkdir -p "$CI_PROJECT_DIR"/.stack_root
+export TAR_OPTIONS=--no-same-owner
+stack --allow-different-user --stack-root "$CI_PROJECT_DIR"/.stack_root build
+stack --allow-different-user --stack-root "$CI_PROJECT_DIR"/.stack_root test

.gitlab/script/ghcup_version.sh

@@ -11,7 +11,7 @@ ecabal() {
 }
 
 eghcup() {
-	ghcup -v -c -s file://$(pwd)/ghcup-${JSON_VERSION}.json "$@"
+	ghcup -v -c -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml "$@"
 }
 
 git describe --always
@@ -20,16 +20,28 @@ git describe --always
 
 ecabal update
 
+ecabal install -w ghc-${GHC_VERSION} --installdir="$CI_PROJECT_DIR"/.local/bin hspec-discover
+
 if [ "${OS}" = "DARWIN" ] ; then
 	ecabal build -w ghc-${GHC_VERSION} -ftui
+	ecabal test -w ghc-${GHC_VERSION} -ftui ghcup-test
+elif [ "${OS}" = "LINUX" ] ; then
+	if [ "${BIT}" = "32" ] ; then
+		ecabal build -w ghc-${GHC_VERSION} -finternal-downloader -ftui -ftar
+		ecabal test -w ghc-${GHC_VERSION} -finternal-downloader -ftui -ftar ghcup-test
+	else
+		ecabal build -w ghc-${GHC_VERSION} -finternal-downloader -ftui
+		ecabal test -w ghc-${GHC_VERSION} -finternal-downloader -ftui ghcup-test
+	fi
 else
 	ecabal build -w ghc-${GHC_VERSION} -finternal-downloader -ftui
+	ecabal test -w ghc-${GHC_VERSION} -finternal-downloader -ftui ghcup-test
 fi
 
-ecabal haddock
+ecabal haddock -w ghc-${GHC_VERSION} -ftar
 
-cp "$(ecabal new-exec --enable-tests --verbose=0 --offline sh -- -c 'command -v ghcup')" .
-cp "$(ecabal new-exec --enable-tests --verbose=0 --offline sh -- -c 'command -v ghcup-gen')" .
+cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --verbose=0 --offline sh -- -c 'command -v ghcup')" .
+cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --verbose=0 --offline sh -- -c 'command -v ghcup-gen')" .
 
 cp ./ghcup "$CI_PROJECT_DIR"/.local/bin/ghcup
 cp ./ghcup-gen "$CI_PROJECT_DIR"/.local/bin/ghcup-gen
@@ -42,7 +54,7 @@ rm -rf "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup
 ### manual cli based testing
 
 
-ghcup-gen check -f ghcup-${JSON_VERSION}.json
+ghcup-gen check -f ghcup-${JSON_VERSION}.yaml
 
 eghcup --numeric-version
 
@@ -81,6 +93,18 @@ eghcup set ${GHC_VERSION}
 eghcup rm 8.4.4
 [ "$(ghc --numeric-version)" = "${ghc_ver}" ]
 
+# install hls
+if [ "${OS}" = "DARWIN" ] ; then
+	eghcup install hls
+	haskell-language-server-wrapper --version
+elif [ "${OS}" = "LINUX" ] ; then
+	if [ "${BIT}" = "64" ] ; then
+		eghcup install hls
+		haskell-language-server-wrapper --version
+	fi
+fi
+
+
 eghcup rm $(ghc --numeric-version)
 
 eghcup upgrade

.travis/build.sh

@@ -2,23 +2,21 @@
 
 set -ex
 
-## install ghc via old ghcup
-
 mkdir -p ~/.ghcup/bin
-curl https://gitlab.haskell.org/haskell/ghcup/raw/master/ghcup > ~/.ghcup/bin/ghcup
+curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-apple-darwin-ghcup > ~/.ghcup/bin/ghcup
 chmod +x ~/.ghcup/bin/ghcup
 
 export PATH="$HOME/.ghcup/bin:$PATH"
 
-ghcup install 8.8.3
-ghcup install-cabal 3.2.0.0
-ghcup set 8.8.3
+ghcup install 8.10.3
+ghcup install-cabal 3.4.0.0-rc4
+ghcup set 8.10.3
 
 
 ## install ghcup
 
 cabal update
-cabal build --constraint="zlib static" --constraint="lzma static" -ftui
+cabal build --constraint="zlib +static" --constraint="lzma +static" -ftui
 cp "$(cabal new-exec --verbose=0 --offline sh -- -c 'command -v ghcup')" .
 strip ./ghcup
 cp ghcup "./${ARTIFACT}"

CHANGELOG.md

@@ -1,5 +1,53 @@
 # Revision history for ghcup
 
+## 0.1.13 -- ????-??-??
+
+* Fix to `ghcup` directory creation and placement for the XDG install mode ([MR #49](https://gitlab.haskell.org/haskell/ghcup-hs/-/merge_requests/49))
+* Do 755 permissions on executables, wrt #97
+* Add [NO_COLOR](https://no-color.org/) support wrt [MR #47](https://gitlab.haskell.org/haskell/ghcup-hs/-/merge_requests/47)
+
+## 0.1.12 -- 2020-11-21
+
+* Fix disappearing HLS symlinks wrt #91
+* improve TUI:
+  - separators between tools sections
+  - reverse list order so latest is on top
+  - expand the blues selected bar
+  - show new latest versions in bright white
+* allow configuration file and setting TUI hotkeys wrt #41
+  - see https://gitlab.haskell.org/haskell/ghcup-hs#configuration for a more in-depth explanation
+* add a `--set` switch to `ghcup install ghc` to automatically set as default after install
+* emit warnings when CC/LD is set wrt #82
+* add support for version ranges in distro specifiers wrt #84
+  - e.g. `"(>= 19 && <= 20) || ==0.2.2"` is a valid version key for distro
+
+## 0.1.11 -- 2020-09-23
+
+* Add support for installing haskell-language-server, wrt #65
+* When compiling GHC from source create a bindist first, store that bindist in `~/.ghcup/cache` and install it, wrt #51
+* Allow to compile over existing version (`ghcup compile ghc -v 8.6.5 -b 8.6.5`) and replace it wrt #59
+* simplify installing from custom bindist wrt #60
+  - `ghcup install ghc -u <url> <version>`
+* fix bug when cabal isn't marked executable in bindist
+* fix bug when `~/.ghcup` is a valid symlink wrt #49
+* Drop support for compiling cabal from source (the old bootstrap script is discontinued)
+
+## 0.1.10 -- 2020-08-14
+
+* Show stray Cabals (useful for pre-releases or compiled ones)
+
+## 0.1.9 -- 2020-08-14
+
+* Fix bug when uninstalling all cabal versions
+* Fix bug when setting a non-installed ghc version as current default
+* Use yaml instead of generated json for download info for ease of adding new GHC versions #44
+* Allow pre-release versions of GHC/cabal
+* Add XDG dirs support (set `GHCUP_USE_XDG_DIRS`) wrt #39
+* Allow to specify regex for tarball subdir (e.g. `ghc-.*`)
+* Allow installing arbitrary bindists more seamlessly:
+  - e.g. installing GHC HEAD: `ghcup -n install ghc -u '{"dlHash": "", "dlSubdir": { "RegexDir": "ghc-.*"}, "dlUri": "https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27" }' head`
+* Avoid duplicate edits to .bashrc/.zshrc wrt #43
+
 ## 0.1.8 -- 2020-07-21
 
 * Fix bug in logging thread dying on newlines

HACKING.md

@@ -52,8 +52,19 @@ organised tree-ish in `GHCup.Utils` and `GHCup.Utils.*`.
 Anything dealing with ghcup specific directories is in
 `GHCup.Utils.Dirs`.
 
-Download information on where to fetch bindists from is in
-`GHCup.Data.GHCupDownloads`.
+Download information on where to fetch bindists from is in the appropriate
+yaml files: `ghcup-<yaml-ver>.yaml`.
+
+## Common Tasks
+
+### Adding a new GHC version
+
+1. open the latest `ghcup-<yaml-ver>.yaml`
+2. find the latest ghc version (in yaml tree e.g. `ghcupDownloads -> GHC -> 8.10.3`)
+3. copy-paste it
+4. adjust the version, tags, changelog, source url
+5. adjust the various bindist urls (make sure to also change the yaml anchors)
+6. run `cabal run exe:ghcup-gen -- check-tarballs -f ghcup-<yaml-ver>.yaml -u 'ghc-8\.10\.4'`
 
 ## Major refactors
 

README.md

@@ -9,10 +9,16 @@ Similar in scope to [rustup](https://github.com/rust-lang-nursery/rustup.rs), [p
 ## Table of Contents
 
    * [Installation](#installation)
+     * [Simple bootstrap](#simple-bootstrap)
+     * [Manual install](#manual-install)
+     * [Vim integration](#vim-integration)
    * [Usage](#usage)
+     * [Configuration](#configuration)
      * [Manpages](#manpages)
      * [Shell-completion](#shell-completion)
      * [Cross support](#cross-support)
+     * [XDG support](#xdg-support)
+     * [Installing custom bindists](#installing-custom-bindists)
    * [Design goals](#design-goals)
    * [How](#how)
    * [Known users](#known-users)
@@ -36,6 +42,10 @@ Then adjust your `PATH` in `~/.bashrc` (or similar, depending on your shell) lik
 export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$PATH"
 ```
 
+### Vim integration
+
+See [ghcup.vim](https://github.com/hasufell/ghcup.vim).
+
 ## Usage
 
 See `ghcup --help`.
@@ -71,6 +81,13 @@ ghcup upgrade
 Generally this is meant to be used with [`cabal-install`](https://hackage.haskell.org/package/cabal-install), which
 handles your haskell packages and can demand that [a specific version](https://cabal.readthedocs.io/en/latest/nix-local-build.html#cfg-flag---with-compiler)  of `ghc` is available, which `ghcup` can do.
 
+### Configuration
+
+A configuration file can be put in `~/.ghcup/config.yaml`. The default config file
+explaining all possible configurations can be found in this repo: [config.yaml](./config.yaml).
+
+Partial configuration is fine. Command line options always overwrite the config file settings.
+
 ### Manpages
 
 For man pages to work you need [man-db](http://man-db.nongnu.org/) as your `man` provider, then issue `man ghc`. Manpages only work for the currently set ghc.
@@ -96,6 +113,33 @@ For distributions with non-standard locations of cross toolchain and
 libraries, this may need some tweaking of `build.mk` or configure args.
 See `ghcup compile ghc --help` for further information.
 
+### XDG support
+
+To enable XDG style directories, set the environment variable `GHCUP_USE_XDG_DIRS` to anything.
+
+Then you can control the locations via XDG environment variables as such:
+
+* `XDG_DATA_HOME`: GHCs will be unpacked in `ghcup/ghc` subdir (default: `~/.local/share`)
+* `XDG_CACHE_HOME`: logs and download files will be stored in `ghcup` subdir (default: `~/.cache`)
+* `XDG_BIN_HOME`: binaries end up here (default: `~/.local/bin`)
+* `XDG_CONFIG_HOME`: the config file is stored in `ghcup` subdir as `config.yaml` (default: `~/.config`)
+
+### Installing custom bindists
+
+There are a couple of good use cases to install custom bindists:
+
+1. manually built bindists (e.g. with patches)
+  - example: `ghcup install ghc -u 'file:///home/mearwald/tmp/ghc-eff-patches/ghc-8.10.2-x86_64-deb10-linux.tar.xz' 8.10.2-eff`
+2. GHC head CI bindists
+  - example: `ghcup install ghc -u 'https://gitlab.haskell.org/api/v4/projects/1/jobs/artifacts/master/raw/ghc-x86_64-fedora27-linux.tar.xz?job=validate-x86_64-linux-fedora27' head`
+3. DWARF bindists
+  - example: `ghcup install ghc -u 'https://downloads.haskell.org/~ghc/8.10.2/ghc-8.10.2-x86_64-deb10-linux-dwarf.tar.xz' 8.10.2-dwarf`
+
+Since the version parser is pretty lax, `8.10.2-eff` and `head` are both valid versions
+and produce the binaries `ghc-8.10.2-eff` and `ghc-head` respectively.
+GHCup always needs to know which version the bindist corresponds to (this is not automatically
+detected).
+
 ## Design goals
 
 1. simplicity
@@ -128,6 +172,17 @@ In addition this script can also install `cabal-install`.
 
 ## Known problems
 
+### Custom ghc version names
+
+When installing ghc bindists with custom version names as outlined in
+[installing custom bindists](#installing-custom-bindists), then cabal might
+be unable to find the correct `ghc-pkg` (also see [#73](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/73))
+if you use `cabal build --with-compiler=ghc-foo`. Instead, point it to the full path, such as:
+`cabal build --with-compiler=$HOME/.ghcup/ghc/<version-name>/bin/ghc` or set that GHC version
+as the current one via: `ghcup set ghc <version-name>`.
+
+This problem doesn't exist for regularly installed GHC versions.
+
 ### Limited distributions supported
 
 Currently only GNU/Linux distributions compatible with the [upstream GHC](https://www.haskell.org/ghc/download_ghc_8_6_1.html#binaries) binaries are supported.

RELEASING.md

@@ -1,19 +1,19 @@
 # RELEASING
 
-1. update `GHCup.Version` module. `ghcupURL` must only be updated if we change the `_toolRequirements` type or the JSON representation of it. The version of the json represents the change increments. `ghcUpVer` is the current application version.
+1. update `GHCup.Version` module. `ghcupURL` must only be updated if we change the `_toolRequirements` type or the YAML representation of it. The version of the YAML represents the change increments. `ghcUpVer` is the current application version.
 
 2. Update version in ghcup.cabal
 
 3. Add ChangeLog entry
 
-4. Add/fix downloads to `GHCupDownloads` module, then run `ghcup-gen gen` to generate the new json and validate it via `ghcup-gen check`.
+4. Add/fix downloads in `ghcup-<ver>.yaml`, then verify with `ghcup-gen check -f ghcup-<ver>.yaml`
 
 5. Commit and git push with tag. Wait for tests to succeed and release artifacts to build.
 
 6. Download release artifacts and upload them `downloads.haskell.org/ghcup`
 
-7. Add release artifacts to GHCupDownloads (see point 4.)
+7. Add release artifacts to yaml file (see point 4.)
 
-8. Upload the final `ghcup-<ver>.json` to `webhost.haskell.org/ghcup/data/`.
+8. Upload the final `ghcup-<ver>.yaml` to `webhost.haskell.org/ghcup/data/`.
 
 9. Update bootstrap-haskell and symlinks on `downloads.haskell.org/ghcup`

app/ghcup-gen/Main.hs

@@ -10,13 +10,11 @@
 
 module Main where
 
-import           GHCup.Data.GHCupInfo
 import           GHCup.Types
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.Logger
 
-import           Data.Aeson                     ( eitherDecode, encode )
-import           Data.Aeson.Encode.Pretty
+import           Data.Char                      ( toLower )
 #if !MIN_VERSION_base(4,13,0)
 import           Data.Semigroup                 ( (<>) )
 #endif
@@ -24,51 +22,19 @@ import           Options.Applicative     hiding ( style )
 import           System.Console.Pretty
 import           System.Exit
 import           System.IO                      ( stdout )
+import           Text.Regex.Posix
 import           Validate
 
 import qualified Data.ByteString               as B
-import qualified Data.ByteString.Lazy          as L
+import qualified Data.Yaml                     as Y
 
 
 data Options = Options
   { optCommand :: Command
   }
 
-data Command = GenJSON GenJSONOpts
-             | ValidateJSON ValidateJSONOpts
-             | ValidateTarballs ValidateJSONOpts
-
-data Output
-  = FileOutput FilePath -- optsparse-applicative doesn't handle ByteString correctly anyway
-  | StdOutput
-
-fileOutput :: Parser Output
-fileOutput =
-  FileOutput
-    <$> (strOption
-          (long "file" <> short 'f' <> metavar "FILENAME" <> help
-            "Output to a file"
-          )
-        )
-
-stdOutput :: Parser Output
-stdOutput = flag'
-  StdOutput
-  (short 'o' <> long "stdout" <> help "Print to stdout (default)")
-
-outputP :: Parser Output
-outputP = fileOutput <|> stdOutput
-
-
-data GenJSONOpts = GenJSONOpts
-  { output :: Maybe Output
-  , pretty :: Bool
-  }
-
-genJSONOpts :: Parser GenJSONOpts
-genJSONOpts = GenJSONOpts <$> optional outputP <*> switch
-  (short 'p' <> long "pretty" <> help "Make JSON output pretty (human readable)"
-  )
+data Command = ValidateYAML ValidateYAMLOpts
+             | ValidateTarballs ValidateYAMLOpts TarballFilter
 
 
 data Input
@@ -92,12 +58,28 @@ stdInput = flag'
 inputP :: Parser Input
 inputP = fileInput <|> stdInput
 
-data ValidateJSONOpts = ValidateJSONOpts
-  { input :: Maybe Input
+data ValidateYAMLOpts = ValidateYAMLOpts
+  { vInput :: Maybe Input
   }
 
-validateJSONOpts :: Parser ValidateJSONOpts
-validateJSONOpts = ValidateJSONOpts <$> optional inputP
+validateYAMLOpts :: Parser ValidateYAMLOpts
+validateYAMLOpts = ValidateYAMLOpts <$> optional inputP
+
+tarballFilterP :: Parser TarballFilter
+tarballFilterP = option readm $
+  long "tarball-filter" <> short 'u' <> metavar "<tool>-<version>" <> value def
+    <> help "Only check certain tarballs (format: <tool>-<version>)"
+  where
+    def = TarballFilter Nothing (makeRegex ("" :: String))
+    readm = do
+      s <- str
+      case span (/= '-') s of
+        (_, []) -> fail "invalid format, missing '-' after the tool name"
+        (t, v) | [tool] <- [ tool | tool <- [minBound..maxBound], low (show tool) == low t ] ->
+          TarballFilter <$> pure (Just tool) <*> makeRegexOptsM compIgnoreCase execBlank (drop 1 v)
+        _ -> fail "invalid tool"
+    low = fmap toLower
+
 
 opts :: Parser Options
 opts = Options <$> com
@@ -105,28 +87,18 @@ opts = Options <$> com
 com :: Parser Command
 com = subparser
   (  (command
-       "gen"
-       (   GenJSON
-       <$> (info (genJSONOpts <**> helper)
-                 (progDesc "Generate the json downloads file")
-           )
-       )
-     )
-  <> (command
        "check"
-       (   ValidateJSON
-       <$> (info (validateJSONOpts <**> helper)
-                 (progDesc "Validate the JSON")
+       (   ValidateYAML
+       <$> (info (validateYAMLOpts <**> helper)
+                 (progDesc "Validate the YAML")
            )
        )
      )
   <> (command
        "check-tarballs"
-       (   ValidateTarballs
-       <$> (info
-             (validateJSONOpts <**> helper)
-             (progDesc "Validate all tarballs (download and checksum)")
-           )
+       (info
+         ((ValidateTarballs <$> validateYAMLOpts <*> tarballFilterP) <**> helper)
+         (progDesc "Validate all tarballs (download and checksum)")
        )
      )
   )
@@ -135,38 +107,27 @@ com = subparser
 
 main :: IO ()
 main = do
-  customExecParser (prefs showHelpOnError) (info (opts <**> helper) idm)
+  _ <- customExecParser (prefs showHelpOnError) (info (opts <**> helper) idm)
     >>= \Options {..} -> case optCommand of
-          GenJSON gopts -> do
-            let bs True =
-                  encodePretty' (defConfig { confIndent = Spaces 2 }) ghcupInfo
-                bs False = encode ghcupInfo
-            case gopts of
-              GenJSONOpts { output = Nothing, pretty } ->
-                L.hPutStr stdout (bs pretty)
-              GenJSONOpts { output = Just StdOutput, pretty } ->
-                L.hPutStr stdout (bs pretty)
-              GenJSONOpts { output = Just (FileOutput file), pretty } ->
-                L.writeFile file (bs pretty)
-          ValidateJSON vopts -> case vopts of
-            ValidateJSONOpts { input = Nothing } ->
-              L.getContents >>= valAndExit validate
-            ValidateJSONOpts { input = Just StdInput } ->
-              L.getContents >>= valAndExit validate
-            ValidateJSONOpts { input = Just (FileInput file) } ->
-              L.readFile file >>= valAndExit validate
-          ValidateTarballs vopts -> case vopts of
-            ValidateJSONOpts { input = Nothing } ->
-              L.getContents >>= valAndExit validateTarballs
-            ValidateJSONOpts { input = Just StdInput } ->
-              L.getContents >>= valAndExit validateTarballs
-            ValidateJSONOpts { input = Just (FileInput file) } ->
-              L.readFile file >>= valAndExit validateTarballs
+          ValidateYAML vopts -> case vopts of
+            ValidateYAMLOpts { vInput = Nothing } ->
+              B.getContents >>= valAndExit validate
+            ValidateYAMLOpts { vInput = Just StdInput } ->
+              B.getContents >>= valAndExit validate
+            ValidateYAMLOpts { vInput = Just (FileInput file) } ->
+              B.readFile file >>= valAndExit validate
+          ValidateTarballs vopts tarballFilter -> case vopts of
+            ValidateYAMLOpts { vInput = Nothing } ->
+              B.getContents >>= valAndExit (validateTarballs tarballFilter)
+            ValidateYAMLOpts { vInput = Just StdInput } ->
+              B.getContents >>= valAndExit (validateTarballs tarballFilter)
+            ValidateYAMLOpts { vInput = Just (FileInput file) } ->
+              B.readFile file >>= valAndExit (validateTarballs tarballFilter)
   pure ()
 
  where
   valAndExit f contents = do
-    (GHCupInfo _ av) <- case eitherDecode contents of
+    (GHCupInfo _ av) <- case Y.decodeEither' contents of
       Right r -> pure r
       Left  e -> die (color Red $ show e)
     myLoggerT (LoggerConfig True (B.hPut stdout) (\_ -> pure ())) (f av)

app/ghcup-gen/Validate.hs

@@ -7,7 +7,10 @@ module Validate where
 import           GHCup
 import           GHCup.Download
 import           GHCup.Types
+import           GHCup.Types.Optics
+import           GHCup.Utils.Dirs
 import           GHCup.Utils.Logger
+import           GHCup.Utils.Version.QQ
 
 import           Control.Exception.Safe
 import           Control.Monad
@@ -19,6 +22,7 @@ import           Control.Monad.Trans.Reader     ( runReaderT )
 import           Control.Monad.Trans.Resource   ( runResourceT
                                                 , MonadUnliftIO
                                                 )
+import           Data.Containers.ListUtils      ( nubOrd )
 import           Data.IORef
 import           Data.List
 import           Data.String.Interpolate
@@ -28,6 +32,7 @@ import           Optics
 import           System.Exit
 import           System.IO
 import           Text.ParserCombinators.ReadP
+import           Text.Regex.Posix
 
 import qualified Data.ByteString               as B
 import qualified Data.Map.Strict               as M
@@ -53,7 +58,7 @@ validate :: (Monad m, MonadLogger m, MonadThrow m, MonadIO m, MonadUnliftIO m)
 validate dls = do
   ref <- liftIO $ newIORef 0
 
-  -- * verify binary downloads * --
+  -- verify binary downloads --
   flip runReaderT ref $ do
     -- unique tags
     forM_ (M.toList dls) $ \(t, _) -> checkUniqueTags t
@@ -88,6 +93,15 @@ validate dls = do
     when ((not $ any (== FreeBSD) pspecs) && arch == A_64) $ lift $ $(logWarn)
       [i|FreeBSD missing for #{t} #{v'} #{arch}|]
 
+    -- alpine needs to be set explicitly, because
+    -- we cannot assume that "Linux UnknownLinux" runs on Alpine
+    -- (although it could be static)
+    when (not $ any (== Linux Alpine) pspecs) $
+      case t of
+        GHCup -> (lift $ $(logError) [i|Linux Alpine missing for #{t} #{v'} #{arch}|]) >> addError
+        Cabal | v > [vver|2.4.1.0|] -> (lift $ $(logError) [i|Linux Alpine missing for #{t} #{v'} #{arch}|]) >> addError
+        _     -> lift $ $(logWarn) [i|Linux Alpine missing for #{t} #{v'} #{arch}|]
+
   checkUniqueTags tool = do
     let allTags = join $ M.elems $ availableToolVersions dls tool
     let nonUnique =
@@ -111,6 +125,8 @@ validate dls = do
    where
     isUniqueTag Latest         = True
     isUniqueTag Recommended    = True
+    isUniqueTag Old            = False
+    isUniqueTag Prerelease     = False
     isUniqueTag (Base       _) = False
     isUniqueTag (UnknownTag _) = False
 
@@ -144,6 +160,11 @@ validate dls = do
   isBase (Base _) = True
   isBase _        = False
 
+data TarballFilter = TarballFilter
+  { tfTool    :: Maybe Tool
+  , tfVersion :: Regex
+  }
+
 validateTarballs :: ( Monad m
                     , MonadLogger m
                     , MonadThrow m
@@ -151,23 +172,20 @@ validateTarballs :: ( Monad m
                     , MonadUnliftIO m
                     , MonadMask m
                     )
-                 => GHCupDownloads
+                 => TarballFilter
+                 -> GHCupDownloads
                  -> m ExitCode
-validateTarballs dls = do
+validateTarballs (TarballFilter tool versionRegex) dls = do
   ref <- liftIO $ newIORef 0
 
   flip runReaderT ref $ do
-     -- download/verify all binary tarballs
-    let
-      dlbis = nub $ join $ (M.elems dls) <&> \versions ->
-        join $ (M.elems versions) <&> \vi ->
-          join $ (M.elems $ _viArch vi) <&> \pspecs ->
-            join $ (M.elems pspecs) <&> \pverspecs -> (M.elems pverspecs)
-    forM_ dlbis $ downloadAll
-
-    let dlsrc = nub $ join $ (M.elems dls) <&> \versions ->
-          join $ (M.elems versions) <&> maybe [] (: []) . _viSourceDL
-    forM_ dlsrc $ downloadAll
+     -- download/verify all tarballs
+    let dlis = nubOrd $ dls ^.. each
+          %& indices (maybe (const True) (==) tool) %> each
+          %& indices (matchTest versionRegex . T.unpack . prettyVer)
+          % (viSourceDL % _Just `summing` viArch % each % each % each)
+    when (null dlis) $ $(logError) [i|no tarballs selected by filter|] *> addError
+    forM_ dlis $ downloadAll
 
     -- exit
     e <- liftIO $ readIORef ref
@@ -178,12 +196,13 @@ validateTarballs dls = do
         pure ExitSuccess
 
  where
+  runLogger = myLoggerT LoggerConfig { lcPrintDebug = True
+                                     , colorOutter  = B.hPut stderr
+                                     , rawOutter    = (\_ -> pure ())
+                                     }
   downloadAll dli = do
-    let settings = Settings True False Never Curl False
-    let runLogger = myLoggerT LoggerConfig { lcPrintDebug = True
-                                           , colorOutter  = B.hPut stderr
-                                           , rawOutter    = (\_ -> pure ())
-                                           }
+    dirs <- liftIO getDirs
+    let settings = AppState (Settings True False Never Curl False GHCupURL) dirs defaultKeyBindings
 
     r <-
       runLogger

app/ghcup/BrickMain.hs

@@ -1,9 +1,11 @@
 {-# LANGUAGE CPP               #-}
 {-# LANGUAGE DataKinds         #-}
-{-# LANGUAGE QuasiQuotes       #-}
-{-# LANGUAGE TypeApplications  #-}
-{-# LANGUAGE TemplateHaskell   #-}
+{-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE QuasiQuotes       #-}
+{-# LANGUAGE TemplateHaskell   #-}
+{-# LANGUAGE TypeApplications  #-}
+{-# LANGUAGE ViewPatterns      #-}
 
 module BrickMain where
 
@@ -19,7 +21,10 @@ import           Brick
 import           Brick.Widgets.Border
 import           Brick.Widgets.Border.Style
 import           Brick.Widgets.Center
-import           Brick.Widgets.List
+import           Brick.Widgets.List             ( listSelectedFocusedAttr
+                                                , listSelectedAttr
+                                                , listAttr
+                                                )
 #if !defined(TAR)
 import           Codec.Archive
 #endif
@@ -31,59 +36,114 @@ import           Data.Bool
 import           Data.Functor
 import           Data.List
 import           Data.Maybe
-import           Data.Char
 import           Data.IORef
 import           Data.String.Interpolate
-import           Data.Vector                    ( Vector )
+import           Data.Vector                    ( Vector
+                                                , (!?)
+                                                )
 import           Data.Versions           hiding ( str )
 import           Haskus.Utils.Variant.Excepts
 import           Prelude                 hiding ( appendFile )
+import           System.Environment
 import           System.Exit
 import           System.IO.Unsafe
 import           URI.ByteString
 
+import qualified GHCup.Types                   as GT
+
 import qualified Data.Text                     as T
 import qualified Graphics.Vty                  as Vty
 import qualified Data.Vector                   as V
 
 
-data AppState = AppState {
-    lr :: LR
-  , dls :: GHCupDownloads
+
+data BrickData = BrickData
+  { lr    :: [ListResult]
+  , dls   :: GHCupDownloads
   , pfreq :: PlatformRequest
-}
+  }
+  deriving Show
 
-type LR = GenericList String Vector ListResult
+data BrickSettings = BrickSettings
+  { showAll :: Bool
+  }
+  deriving Show
+
+data BrickInternalState = BrickInternalState
+  { clr :: Vector ListResult
+  , ix  :: Int
+  }
+  deriving Show
+
+data BrickState = BrickState
+  { appData     :: BrickData
+  , appSettings :: BrickSettings
+  , appState    :: BrickInternalState
+  , appKeys     :: KeyBindings
+  }
+  deriving Show
 
 
-keyHandlers :: [(Char, String, AppState -> EventM n (Next AppState))]
-keyHandlers =
-  [ ('q', "Quit"     , halt)
-  , ('i', "Install"  , withIOAction install')
-  , ('u', "Uninstall", withIOAction del')
-  , ('s', "Set"      , withIOAction set')
-  , ('c', "ChangeLog", withIOAction changelog')
+keyHandlers :: KeyBindings
+            -> [ ( Vty.Key
+                 , BrickSettings -> String
+                 , BrickState -> EventM n (Next BrickState)
+                 )
+               ]
+keyHandlers KeyBindings {..} =
+  [ (bQuit, const "Quit"     , halt)
+  , (bInstall, const "Install"  , withIOAction install')
+  , (bUninstall, const "Uninstall", withIOAction del')
+  , (bSet, const "Set"      , withIOAction set')
+  , (bChangelog, const "ChangeLog", withIOAction changelog')
+  , ( bShowAll
+    , (\BrickSettings {..} ->
+        if showAll then "Hide old versions" else "Show all versions"
+      )
+    , hideShowHandler
+    )
+  , (bUp, const "Up", \BrickState {..} -> continue (BrickState { appState = (moveCursor 1 appState Up), .. }))
+  , (bDown, const "Down", \BrickState {..} -> continue (BrickState { appState = (moveCursor 1 appState Down), .. }))
   ]
+ where
+  hideShowHandler (BrickState {..}) =
+    let newAppSettings   = appSettings { showAll = not . showAll $ appSettings }
+        newInternalState = constructList appData newAppSettings (Just appState)
+    in  continue (BrickState appData newAppSettings newInternalState appKeys)
 
 
-ui :: AppState -> Widget String
-ui AppState {..} =
-  ( padBottom Max
+showKey :: Vty.Key -> String
+showKey (Vty.KChar c) = [c]
+showKey (Vty.KUp) = "↑"
+showKey (Vty.KDown) = "↓"
+showKey key = tail (show key)
+
+
+ui :: AttrMap -> BrickState -> Widget String
+ui dimAttrs BrickState { appSettings = as@(BrickSettings {}), ..}
+  = ( padBottom Max
     $ ( withBorderStyle unicode
       $ borderWithLabel (str "GHCup")
-      $ (center $ renderList renderItem True lr)
+      $ (center $ (header <=> hBorder <=> renderList' appState))
       )
     )
-    <=> ( withAttr "help"
-        . txtWrap
-        . T.pack
-        . foldr1 (\x y -> x <> "  " <> y)
-        . (++ ["↑↓:Navigation"])
-        $ (fmap (\(c, s, _) -> (c : ':' : s)) keyHandlers)
-        )
+    <=> footer
 
  where
-  renderItem b ListResult {..} =
+  footer =
+    withAttr "help"
+      . txtWrap
+      . T.pack
+      . foldr1 (\x y -> x <> "  " <> y)
+      $ (fmap (\(key, s, _) -> (showKey key <> ":" <> s as)) $ keyHandlers appKeys)
+  header =
+    (minHSize 2 $ emptyWidget)
+      <+> (padLeft (Pad 2) $ minHSize 6 $ str "Tool")
+      <+> (minHSize 15 $ str "Version")
+      <+> (padLeft (Pad 1) $ minHSize 25 $ str "Tags")
+      <+> (padLeft (Pad 5) $ str "Notes")
+  renderList' = withDefAttr listAttr . drawListElements renderItem True
+  renderItem _ b listResult@(ListResult {..}) =
     let marks = if
           | lSet       -> (withAttr "set" $ str "✔✔")
           | lInstalled -> (withAttr "installed" $ str "✓ ")
@@ -91,135 +151,277 @@ ui AppState {..} =
         ver = case lCross of
           Nothing -> T.unpack . prettyVer $ lVer
           Just c  -> T.unpack (c <> "-" <> prettyVer lVer)
-        dim = if lNoBindist
-          then updateAttrMap (const dimAttributes) . withAttr "no-bindist"
-          else id
-    in  dim
+        dim
+          | lNoBindist = updateAttrMap (const dimAttrs) . withAttr "no-bindist"
+          | otherwise  = id
+        hooray
+          | elem Latest lTag && not lInstalled =
+              withAttr "hooray"
+          | otherwise = id
+        active = if b then forceAttr "active" else id
+    in  hooray $ active $ dim
           (   marks
-          <+> ( padLeft (Pad 2)
-              $ minHSize 20
-              $ ((if b then withAttr "active" else id)
-                  (str $ (fmap toLower . show $ lTool) <> " " <> ver)
-                )
+          <+> (( padLeft (Pad 2)
+               $ minHSize 6
+               $ (printTool lTool)
+               )
               )
-          <+> (padLeft (Pad 1) $ if null lTag
-                then emptyWidget
-                else
-                  foldr1 (\x y -> x <+> str "," <+> y)
-                    $ (fmap printTag $ sort lTag)
+          <+> (minHSize 15 $ (str ver))
+          <+> (let l = catMaybes . fmap printTag $ sort lTag
+               in  padLeft (Pad 1) $ minHSize 25 $ if null l
+                     then emptyWidget
+                     else foldr1 (\x y -> x <+> str "," <+> y) l
               )
+          <+> ( padLeft (Pad 5)
+              $ let notes = printNotes listResult
+                in  if null notes
+                      then emptyWidget
+                      else foldr1 (\x y -> x <+> str "," <+> y) $ notes
+              )
+          <+> (vLimit 1 $ fill ' ')
           )
 
-  printTag Recommended        = withAttr "recommended" $ str "recommended"
-  printTag Latest             = withAttr "latest" $ str "latest"
-  printTag (Base       pvp'') = str ("base-" ++ T.unpack (prettyPVP pvp''))
-  printTag (UnknownTag t    ) = str t
+  printTag Recommended    = Just $ withAttr "recommended" $ str "recommended"
+  printTag Latest         = Just $ withAttr "latest" $ str "latest"
+  printTag Prerelease     = Just $ withAttr "prerelease" $ str "prerelease"
+  printTag (Base pvp'')   = Just $ str ("base-" ++ T.unpack (prettyPVP pvp''))
+  printTag Old            = Nothing
+  printTag (UnknownTag t) = Just $ str t
+
+  printTool Cabal = str "cabal"
+  printTool GHC = str "GHC"
+  printTool GHCup = str "GHCup"
+  printTool HLS = str "HLS"
+
+  printNotes ListResult {..} =
+    (if hlsPowered then [withAttr "hls-powered" $ str "hls-powered"] else mempty
+      )
+      ++ (if fromSrc then [withAttr "compiled" $ str "compiled"] else mempty)
+      ++ (if lStray then [withAttr "stray" $ str "stray"] else mempty)
+
+  -- | Draws the list elements.
+  --
+  -- Evaluates the underlying container up to, and a bit beyond, the
+  -- selected element. The exact amount depends on available height
+  -- for drawing and 'listItemHeight'. At most, it will evaluate up to
+  -- element @(i + h + 1)@ where @i@ is the selected index and @h@ is the
+  -- available height.
+  drawListElements :: (Int -> Bool -> ListResult -> Widget String)
+                   -> Bool
+                   -> BrickInternalState
+                   -> Widget String
+  drawListElements drawElem foc is@(BrickInternalState clr _) =
+    Widget Greedy Greedy $
+      let
+        es = clr
+        listSelected        = fmap fst $ listSelectedElement' is
+
+        drawnElements = flip V.imap es $ \i' e ->
+          let addSeparator w = case es !? (i' - 1) of
+                Just e' | lTool e' /= lTool e ->
+                  hBorder <=> w
+                _                             -> w
+
+              isSelected  = Just i' == listSelected
+              elemWidget  = drawElem i' isSelected e
+              selItemAttr = if foc
+                then withDefAttr listSelectedFocusedAttr
+                else withDefAttr listSelectedAttr
+              makeVisible = if isSelected then visible . selItemAttr else id
+          in  addSeparator $ makeVisible elemWidget
+
+      in render
+        $ viewport "GHCup" Vertical
+        $ vBox
+        $ V.toList drawnElements
 
 
 minHSize :: Int -> Widget n -> Widget n
 minHSize s' = hLimit s' . vLimit 1 . (<+> fill ' ')
 
 
-app :: App AppState e String
-app = App { appDraw         = \st -> [ui st]
-          , appHandleEvent  = eventHandler
-          , appStartEvent   = return
-          , appAttrMap      = const defaultAttributes
-          , appChooseCursor = neverShowCursor
-          }
+app :: AttrMap -> AttrMap -> App BrickState e String
+app attrs dimAttrs =
+  App { appDraw         = \st -> [ui dimAttrs st]
+  , appHandleEvent  = eventHandler
+  , appStartEvent   = return
+  , appAttrMap      = const attrs
+  , appChooseCursor = neverShowCursor
+  }
 
-defaultAttributes :: AttrMap
-defaultAttributes = attrMap
+defaultAttributes :: Bool -> AttrMap
+defaultAttributes no_color = attrMap
   Vty.defAttr
-  [ ("active"       , Vty.defAttr `Vty.withBackColor` Vty.blue)
-  , ("not-installed", Vty.defAttr `Vty.withForeColor` Vty.red)
-  , ("set"          , Vty.defAttr `Vty.withForeColor` Vty.green)
-  , ("installed"    , Vty.defAttr `Vty.withForeColor` Vty.green)
-  , ("recommended"  , Vty.defAttr `Vty.withForeColor` Vty.green)
-  , ("latest"       , Vty.defAttr `Vty.withForeColor` Vty.yellow)
-  , ("help"         , Vty.defAttr `Vty.withStyle` Vty.italic)
+  [ ("active"       , Vty.defAttr `withBackColor` Vty.blue)
+  , ("not-installed", Vty.defAttr `withForeColor` Vty.red)
+  , ("set"          , Vty.defAttr `withForeColor` Vty.green)
+  , ("installed"    , Vty.defAttr `withForeColor` Vty.green)
+  , ("recommended"  , Vty.defAttr `withForeColor` Vty.green)
+  , ("hls-powered"  , Vty.defAttr `withForeColor` Vty.green)
+  , ("latest"       , Vty.defAttr `withForeColor` Vty.yellow)
+  , ("prerelease"   , Vty.defAttr `withForeColor` Vty.red)
+  , ("compiled"     , Vty.defAttr `withForeColor` Vty.blue)
+  , ("stray"        , Vty.defAttr `withForeColor` Vty.blue)
+  , ("help"         , Vty.defAttr `withStyle`     Vty.italic)
+  , ("hooray"       , Vty.defAttr `withForeColor` Vty.brightWhite)
   ]
+  where
+    withForeColor | no_color  = const
+                  | otherwise = Vty.withForeColor
 
+    withBackColor | no_color  = \attr _ -> attr `Vty.withStyle` Vty.reverseVideo
+                  | otherwise = Vty.withBackColor
 
-dimAttributes :: AttrMap
-dimAttributes = attrMap
+    withStyle                 = Vty.withStyle
+
+dimAttributes :: Bool -> AttrMap
+dimAttributes no_color = attrMap
   (Vty.defAttr `Vty.withStyle` Vty.dim)
-  [ ("active"    , Vty.defAttr `Vty.withBackColor` Vty.blue)
+  [ ("active"    , Vty.defAttr `withBackColor` Vty.blue)
   , ("no-bindist", Vty.defAttr `Vty.withStyle` Vty.dim)
   ]
+  where
+    withBackColor | no_color  = \attr _ -> attr `Vty.withStyle` Vty.reverseVideo
+                  | otherwise = Vty.withBackColor
+
+eventHandler :: BrickState -> BrickEvent n e -> EventM n (Next BrickState)
+eventHandler st@(BrickState {..}) ev = do
+  AppState { keyBindings = kb } <- liftIO $ readIORef settings'
+  case ev of
+    (MouseDown _ Vty.BScrollUp _ _) ->
+      continue (BrickState { appState = moveCursor 1 appState Up, .. })
+    (MouseDown _ Vty.BScrollDown _ _) ->
+      continue (BrickState { appState = moveCursor 1 appState Down, .. })
+    (VtyEvent (Vty.EvResize _ _)) -> continue st
+    (VtyEvent (Vty.EvKey Vty.KUp _)) ->
+      continue (BrickState { appState = (moveCursor 1 appState Up), .. })
+    (VtyEvent (Vty.EvKey Vty.KDown _)) ->
+      continue (BrickState { appState = (moveCursor 1 appState Down), .. })
+    (VtyEvent (Vty.EvKey key _)) ->
+      case find (\(key', _, _) -> key' == key) (keyHandlers kb) of
+        Nothing -> continue st
+        Just (_, _, handler) -> handler st
+    _ -> continue st
 
 
-
-eventHandler :: AppState -> BrickEvent n e -> EventM n (Next AppState)
-eventHandler st (VtyEvent (Vty.EvResize _               _)) = continue st
-eventHandler st (VtyEvent (Vty.EvKey    (Vty.KChar 'q') _)) = halt st
-eventHandler st (VtyEvent (Vty.EvKey    Vty.KEsc        _)) = halt st
-eventHandler AppState {..} (VtyEvent (Vty.EvKey (Vty.KUp) _)) =
-  continue (AppState (listMoveUp lr) dls pfreq)
-eventHandler AppState {..} (VtyEvent (Vty.EvKey (Vty.KDown) _)) =
-  continue (AppState (listMoveDown lr) dls pfreq)
-eventHandler as (VtyEvent (Vty.EvKey (Vty.KChar c) _)) =
-  case find (\(c', _, _) -> c' == c) keyHandlers of
-    Nothing              -> continue as
-    Just (_, _, handler) -> handler as
-eventHandler st _ = continue st
+moveCursor :: Int -> BrickInternalState -> Direction -> BrickInternalState
+moveCursor steps ais@(BrickInternalState {..}) direction =
+  let newIx = if direction == Down then ix + steps else ix - steps
+  in  case clr !? newIx of
+        Just _  -> BrickInternalState { ix = newIx, .. }
+        Nothing -> ais
 
 
 -- | Suspend the current UI and run an IO action in terminal. If the
 -- IO action returns a Left value, then it's thrown as userError.
-withIOAction :: (AppState -> (Int, ListResult) -> IO (Either String a))
-             -> AppState
-             -> EventM n (Next AppState)
-withIOAction action as = case listSelectedElement (lr as) of
+withIOAction :: (BrickState -> (Int, ListResult) -> IO (Either String a))
+             -> BrickState
+             -> EventM n (Next BrickState)
+withIOAction action as = case listSelectedElement' (appState as) of
   Nothing      -> continue as
   Just (ix, e) -> suspendAndResume $ do
-    r <- action as (ix, e)
-    case r of
-      Left  err -> throwIO $ userError err
-      Right _   -> do
-        apps <- (fmap . fmap)
-          (\AppState {..} -> AppState { lr = listMoveTo ix lr, .. })
-          $ getAppState Nothing (pfreq as)
-        case apps of
-          Right nas -> do
-            putStrLn "Press enter to continue"
-            _ <- getLine
-            pure nas
-          Left err -> throwIO $ userError err
+    action as (ix, e) >>= \case
+      Left  err -> putStrLn $ ("Error: " <> err)
+      Right _   -> putStrLn "Success"
+    getAppData Nothing (pfreq . appData $ as) >>= \case
+      Right data' -> do
+        putStrLn "Press enter to continue"
+        _ <- getLine
+        pure (updateList data' as)
+      Left err -> throwIO $ userError err
 
 
-install' :: AppState -> (Int, ListResult) -> IO (Either String ())
-install' AppState {..} (_, ListResult {..}) = do
+-- | Update app data and list internal state based on new evidence.
+-- This synchronises @BrickInternalState@ with @BrickData@
+-- and @BrickSettings@.
+updateList :: BrickData -> BrickState -> BrickState
+updateList appD (BrickState {..}) =
+  let newInternalState = constructList appD appSettings (Just appState)
+  in  BrickState { appState    = newInternalState
+                 , appData     = appD
+                 , appSettings = appSettings
+                 , appKeys     = appKeys
+                 }
+
+
+constructList :: BrickData
+              -> BrickSettings
+              -> Maybe BrickInternalState
+              -> BrickInternalState
+constructList appD appSettings mapp =
+  replaceLR (filterVisible (showAll appSettings)) (lr appD) mapp
+
+listSelectedElement' :: BrickInternalState -> Maybe (Int, ListResult)
+listSelectedElement' (BrickInternalState {..}) = fmap (ix, ) $ clr !? ix
+
+
+selectLatest :: Vector ListResult -> Int
+selectLatest v =
+  case V.findIndex (\ListResult {..} -> lTool == GHC && Latest `elem` lTag) v of
+    Just ix -> ix
+    Nothing -> 0
+
+
+-- | Replace the @appState@ or construct it based on a filter function
+-- and a new @[ListResult]@ evidence.
+-- When passed an existing @appState@, tries to keep the selected element.
+replaceLR :: (ListResult -> Bool)
+          -> [ListResult]
+          -> Maybe BrickInternalState
+          -> BrickInternalState
+replaceLR filterF lr s =
+  let oldElem = s >>= listSelectedElement'
+      newVec  = V.fromList . filter filterF $ lr
+      newSelected =
+        case oldElem >>= \(_, oldE) -> V.findIndex (toolEqual oldE) newVec of
+          Just ix -> ix
+          Nothing -> selectLatest newVec
+  in  BrickInternalState newVec newSelected
+ where
+  toolEqual e1 e2 =
+    lTool e1 == lTool e2 && lVer e1 == lVer e2 && lCross e1 == lCross e2
+
+
+filterVisible :: Bool -> ListResult -> Bool
+filterVisible showAll e | lInstalled e = True
+                        | showAll      = True
+                        | otherwise    = not (elem Old (lTag e))
+
+
+install' :: BrickState -> (Int, ListResult) -> IO (Either String ())
+install' BrickState { appData = BrickData {..} } (_, ListResult {..}) = do
   settings <- readIORef settings'
   l        <- readIORef logger'
   let runLogger = myLoggerT l
 
-  let
-    run =
-      runLogger
-        . flip runReaderT settings
-        . runResourceT
-        . runE
-          @'[AlreadyInstalled
-            , UnknownArchive
+  let run =
+        runLogger
+          . flip runReaderT settings
+          . runResourceT
+          . runE
+            @'[ AlreadyInstalled
 #if !defined(TAR)
-            , ArchiveResult
+              , ArchiveResult
 #endif
-            , FileDoesNotExistError
-            , CopyError
-            , NoDownload
-            , NotInstalled
-            , BuildFailed
-            , TagNotFound
-            , DigestError
-            , DownloadFailed
-            , NoUpdate]
+              , UnknownArchive
+              , FileDoesNotExistError
+              , CopyError
+              , NoDownload
+              , NotInstalled
+              , BuildFailed
+              , TagNotFound
+              , DigestError
+              , DownloadFailed
+              , NoUpdate
+              , TarDirDoesNotExist
+              ]
 
   (run $ do
       case lTool of
         GHC   -> liftE $ installGHCBin dls lVer pfreq
         Cabal -> liftE $ installCabalBin dls lVer pfreq
         GHCup -> liftE $ upgradeGHCup dls Nothing False pfreq $> ()
+        HLS   -> liftE $ installHLSBin dls lVer pfreq $> ()
     )
     >>= \case
           VRight _                          -> pure $ Right ()
@@ -233,7 +435,7 @@ install' AppState {..} (_, ListResult {..}) = do
 Also check the logs in ~/.ghcup/logs|]
 
 
-set' :: AppState -> (Int, ListResult) -> IO (Either String ())
+set' :: BrickState -> (Int, ListResult) -> IO (Either String ())
 set' _ (_, ListResult {..}) = do
   settings <- readIORef settings'
   l        <- readIORef logger'
@@ -242,12 +444,13 @@ set' _ (_, ListResult {..}) = do
   let run =
         runLogger
           . flip runReaderT settings
-          . runE @'[FileDoesNotExistError, NotInstalled, TagNotFound]
+          . runE @'[FileDoesNotExistError , NotInstalled , TagNotFound]
 
   (run $ do
       case lTool of
         GHC   -> liftE $ setGHC (GHCTargetVersion lCross lVer) SetGHCOnly $> ()
         Cabal -> liftE $ setCabal lVer $> ()
+        HLS   -> liftE $ setHLS lVer $> ()
         GHCup -> pure ()
     )
     >>= \case
@@ -255,7 +458,7 @@ set' _ (_, ListResult {..}) = do
           VLeft  e -> pure $ Left [i|#{e}|]
 
 
-del' :: AppState -> (Int, ListResult) -> IO (Either String ())
+del' :: BrickState -> (Int, ListResult) -> IO (Either String ())
 del' _ (_, ListResult {..}) = do
   settings <- readIORef settings'
   l        <- readIORef logger'
@@ -267,6 +470,7 @@ del' _ (_, ListResult {..}) = do
       case lTool of
         GHC   -> liftE $ rmGHCVer (GHCTargetVersion lCross lVer) $> ()
         Cabal -> liftE $ rmCabalVer lVer $> ()
+        HLS   -> liftE $ rmHLSVer lVer $> ()
         GHCup -> pure ()
     )
     >>= \case
@@ -274,36 +478,36 @@ del' _ (_, ListResult {..}) = do
           VLeft  e -> pure $ Left [i|#{e}|]
 
 
-changelog' :: AppState -> (Int, ListResult) -> IO (Either String ())
-changelog' AppState {..} (_, ListResult {..}) = do
+changelog' :: BrickState -> (Int, ListResult) -> IO (Either String ())
+changelog' BrickState { appData = BrickData {..} } (_, ListResult {..}) = do
   case getChangeLog dls lTool (Left lVer) of
     Nothing -> pure $ Left
       [i|Could not find ChangeLog for #{lTool}, version #{prettyVer lVer}|]
     Just uri -> do
       let cmd = case _rPlatform pfreq of
-                  Darwin  -> "open"
-                  Linux _ -> "xdg-open"
-                  FreeBSD -> "xdg-open"
+            Darwin  -> "open"
+            Linux _ -> "xdg-open"
+            FreeBSD -> "xdg-open"
       exec cmd True [serializeURIRef' uri] Nothing Nothing >>= \case
         Right _ -> pure $ Right ()
         Left  e -> pure $ Left [i|#{e}|]
 
 
-uri' :: IORef (Maybe URI)
-{-# NOINLINE uri' #-}
-uri' = unsafePerformIO (newIORef Nothing)
-
-
-settings' :: IORef Settings
+settings' :: IORef AppState
 {-# NOINLINE settings' #-}
-settings' = unsafePerformIO
-  (newIORef Settings { cache      = True
-                     , noVerify   = False
-                     , keepDirs   = Never
-                     , downloader = Curl
-                     , verbose    = False
-                     }
-  )
+settings' = unsafePerformIO $ do
+  dirs <- getDirs
+  newIORef $ AppState (Settings { cache      = True
+                                , noVerify   = False
+                                , keepDirs   = Never
+                                , downloader = Curl
+                                , verbose    = False
+                                , urlSource  = GHCupURL
+                                , ..
+                                })
+                      dirs
+                      defaultKeyBindings
+
 
 
 logger' :: IORef LoggerConfig
@@ -316,32 +520,42 @@ logger' = unsafePerformIO
   )
 
 
-brickMain :: Settings -> Maybe URI -> LoggerConfig -> GHCupDownloads -> PlatformRequest -> IO ()
-brickMain s muri l av pfreq' = do
-  writeIORef uri'      muri
+brickMain :: AppState
+          -> LoggerConfig
+          -> GHCupDownloads
+          -> PlatformRequest
+          -> IO ()
+brickMain s l av pfreq' = do
   writeIORef settings' s
   -- logger interpreter
   writeIORef logger'   l
   let runLogger = myLoggerT l
 
-  eApps <- getAppState (Just av) pfreq'
-  case eApps of
-    Right as -> defaultMain app (selectLatest as) $> ()
-    Left  e  -> do
+  no_color <- isJust <$> lookupEnv "NO_COLOR"
+
+  eAppData <- getAppData (Just av) pfreq'
+  case eAppData of
+    Right ad ->
+      defaultMain
+          (app (defaultAttributes no_color) (dimAttributes no_color))
+          (BrickState ad
+                    defaultAppSettings
+                    (constructList ad defaultAppSettings Nothing)
+                    (keyBindings s)
+
+          )
+        $> ()
+    Left e -> do
       runLogger ($(logError) [i|Error building app state: #{show e}|])
       exitWith $ ExitFailure 2
- where
-  selectLatest :: AppState -> AppState
-  selectLatest AppState {..} =
-    (\ix -> AppState { lr = listMoveTo ix lr, .. })
-      . fromJust
-      . V.findIndex (\ListResult {..} -> lTool == GHC && Latest `elem` lTag)
-      $ (listElements lr)
 
 
-getAppState :: Maybe GHCupDownloads -> PlatformRequest -> IO (Either String AppState)
-getAppState mg pfreq' = do
-  muri     <- readIORef uri'
+defaultAppSettings :: BrickSettings
+defaultAppSettings = BrickSettings { showAll = False }
+
+
+getDownloads' :: IO (Either String GHCupDownloads)
+getDownloads' = do
   settings <- readIORef settings'
   l        <- readIORef logger'
   let runLogger = myLoggerT l
@@ -349,14 +563,30 @@ getAppState mg pfreq' = do
   r <-
     runLogger
     . flip runReaderT settings
-    . runE
-      @'[JSONError, DownloadFailed, FileDoesNotExistError]
-    $ do
-        dls <- maybe (fmap _ghcupDownloads $ liftE $ getDownloadsF (maybe GHCupURL OwnSource muri)) pure mg
-
-        lV <- lift $ listVersions dls Nothing Nothing pfreq'
-        pure $ (AppState (list "Tool versions" (V.fromList lV) 1) dls pfreq')
+    . runE @'[JSONError , DownloadFailed , FileDoesNotExistError]
+    $ fmap _ghcupDownloads
+    $ liftE
+    $ getDownloadsF (urlSource . GT.settings $ settings)
 
   case r of
     VRight a -> pure $ Right a
     VLeft  e -> pure $ Left [i|#{e}|]
+
+
+getAppData :: Maybe GHCupDownloads
+           -> PlatformRequest
+           -> IO (Either String BrickData)
+getAppData mg pfreq' = do
+  settings <- readIORef settings'
+  l        <- readIORef logger'
+  let runLogger = myLoggerT l
+
+  r <- maybe getDownloads' (pure . Right) mg
+
+  runLogger . flip runReaderT settings $ do
+    case r of
+      Right dls -> do
+        lV <- listVersions dls Nothing Nothing pfreq'
+        pure $ Right $ (BrickData (reverse lV) dls pfreq')
+      Left e -> pure $ Left [i|#{e}|]
+

bootstrap-haskell

@@ -1,9 +1,31 @@
 #!/bin/sh
 
+# Main settings:
+#   * BOOTSTRAP_HASKELL_NONINTERACTIVE - any nonzero value for noninteractive installation
+#   * BOOTSTRAP_HASKELL_NO_UPGRADE - any nonzero value to not trigger the upgrade
+#   * GHCUP_USE_XDG_DIRS - any nonzero value to respect The XDG Base Directory Specification
+#   * BOOTSTRAP_HASKELL_VERBOSE - any nonzero value for more verbose installation
+#   * BOOTSTRAP_HASKELL_GHC_VERSION
+#   * BOOTSTRAP_HASKELL_CABAL_VERSION
+
+# License: LGPL-3.0
+
+
 # safety subshell to avoid executing anything in case this script is not downloaded properly
 (
 
 : "${GHCUP_INSTALL_BASE_PREFIX:=$HOME}"
+
+export GHCUP_USE_XDG_DIRS
+
+if [ -n "${GHCUP_USE_XDG_DIRS}" ] ; then
+	GHCUP_DIR=${XDG_DATA_HOME:=$HOME/.local/share}/ghcup
+	GHCUP_BIN=${XDG_BIN_HOME:=$HOME/.local/bin}
+else
+	GHCUP_DIR=${GHCUP_INSTALL_BASE_PREFIX}/.ghcup
+	GHCUP_BIN=${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin
+fi
+
 : "${BOOTSTRAP_HASKELL_GHC_VERSION:=recommended}"
 : "${BOOTSTRAP_HASKELL_CABAL_VERSION:=recommended}"
 
@@ -12,8 +34,7 @@ die() {
     exit 2
 }
 
-edo()
-{
+edo() {
     "$@" || die "\"$*\" failed!"
 }
 
@@ -29,10 +50,26 @@ _eghcup() {
     fi
 }
 
+_done() {
+	echo
+    echo "All done!"
+	echo
+	echo "To start a simple repl, run:"
+	echo "  ghci"
+	echo
+	echo "To start a new haskell project in the current directory, run:"
+	echo "  cabal init --interactive"
+	echo
+	echo "To install other GHC versions, run:"
+	echo "  ghcup tui"
+
+	exit 0
+}
+
 download_ghcup() {
 	_plat="$(uname -s)"
 	_arch=$(uname -m)
-	_ghver="0.1.8"
+	_ghver="0.1.12"
 	_base_url="https://downloads.haskell.org/~ghcup"
 
     case "${_plat}" in
@@ -83,15 +120,16 @@ download_ghcup() {
 			;;
     esac
 
-	edo curl -Lf "${_url}" > "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/ghcup
+	edo curl -Lf "${_url}" > "${GHCUP_BIN}"/ghcup
 
-    edo chmod +x "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/ghcup
+    edo chmod +x "${GHCUP_BIN}"/ghcup
 
-	cat <<-EOF > "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/env || die "Failed to create env file"
-		export PATH="\$HOME/.cabal/bin:\${GHCUP_INSTALL_BASE_PREFIX:=\$HOME}/.ghcup/bin:\$PATH"
+  edo mkdir -p "${GHCUP_DIR}"
+	cat <<-EOF > "${GHCUP_DIR}"/env || die "Failed to create env file"
+		export PATH="\$HOME/.cabal/bin:${GHCUP_BIN}:\$PATH"
 		EOF
 	# shellcheck disable=SC1090
-    edo . "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/env
+    edo . "${GHCUP_DIR}"/env
     eghcup upgrade
 
 	unset _plat _arch _url _ghver _base_url
@@ -102,12 +140,19 @@ echo
 echo "Welcome to Haskell!"
 echo
 echo "This script will download and install the following binaries:"
-echo "  * ghcup - The Haskell toolchain installer (for managing GHC/cabal versions)"
+echo "  * ghcup - The Haskell toolchain installer"
+echo "            (for managing GHC/cabal versions)"
 echo "  * ghc   - The Glasgow Haskell Compiler"
 echo "  * cabal - The Cabal build tool"
 echo
-echo "ghcup installs only into the following directory, which can be removed anytime:"
-echo "  $GHCUP_INSTALL_BASE_PREFIX/.ghcup"
+if [ -z "${GHCUP_USE_XDG_DIRS}" ] ; then
+	echo "ghcup installs only into the following directory,"
+    echo "which can be removed anytime:"
+	echo "  $GHCUP_INSTALL_BASE_PREFIX/.ghcup"
+else
+	echo "ghcup installs into XDG directories as long as"
+    echo "'GHCUP_USE_XDG_DIRS' is set."
+fi
 echo
 
 if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
@@ -119,7 +164,7 @@ if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
     read -r answer </dev/tty
 fi
 
-edo mkdir -p "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin
+edo mkdir -p "${GHCUP_BIN}"
 
 if command -V "ghcup" >/dev/null 2>&1 ; then
     if [ -z "${BOOTSTRAP_HASKELL_NO_UPGRADE}" ] ; then
@@ -154,9 +199,32 @@ printf "\\033[0;35m%s\\033[0m\\n" ""
 printf "\\033[0;35m%s\\033[0m\\n" "Installation done!"
 printf "\\033[0;35m%s\\033[0m\\n" ""
 
+
 if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
+	printf "\\033[0;35m%s\\033[0m\\n" "Do you want to install haskell-language-server (HLS) now?"
+	printf "\\033[0;35m%s\\033[0m\\n" "HLS is a language-server that provides IDE-like functionality"
+	printf "\\033[0;35m%s\\033[0m\\n" "and can integrate with different editors, such as Vim, Emacs, VS Code, Atom, ..."
+	printf "\\033[0;35m%s\\033[0m\\n" "Also see https://github.com/haskell/haskell-language-server/blob/master/README.md"
+	printf "\\033[0;35m%s\\033[0m\\n" ""
+	printf "\\033[0;35m%s\\033[0m\\n" "Answer with YES or NO and press ENTER."
+	printf "\\033[0;35m%s\\033[0m\\n" ""
+
+	while true; do
+		read -r hls_answer </dev/tty
+
+		case $hls_answer in
+			[Yy]*)
+				eghcup --cache install hls
+				break ;;
+			[Nn]*)
+				break ;;
+			*)
+				echo "Please type YES or NO and press enter.";;
+		esac
+	done
+
     echo "In order to run ghc and cabal, you need to adjust your PATH variable."
-    echo "You may want to source '$GHCUP_INSTALL_BASE_PREFIX/.ghcup/env' in your shell"
+    echo "You may want to source '$GHCUP_DIR/env' in your shell"
     echo "configuration to do so (e.g. ~/.bashrc)."
 
 	case $SHELL in
@@ -174,13 +242,13 @@ if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
 				GHCUP_PROFILE_FILE="$HOME/.zshrc"
 				MY_SHELL="zsh"
 			else
-				exit 0
+			    _done
 			fi
 			;;
 		*/fish) # login shell is fish
 			GHCUP_PROFILE_FILE="$HOME/.config/fish/config.fish"
 			MY_SHELL="fish" ;;
-		*) exit 0 ;;
+		*) _done ;;
 	esac
 
 
@@ -198,18 +266,37 @@ if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
 				case $MY_SHELL in
 					"") break ;;
 					fish)
-						echo "set -q GHCUP_INSTALL_BASE_PREFIX[1]; or set GHCUP_INSTALL_BASE_PREFIX \$HOME" >> "${GHCUP_PROFILE_FILE}"
-						echo "test -f \$GHCUP_INSTALL_BASE_PREFIX/.ghcup/env ; and set -gx PATH \$HOME/.cabal/bin \$GHCUP_INSTALL_BASE_PREFIX/.ghcup/bin \$PATH" >> "${GHCUP_PROFILE_FILE}"
+						if ! grep -q "ghcup-env" "${GHCUP_PROFILE_FILE}" ; then
+							echo "# ghcup-env" >> "${GHCUP_PROFILE_FILE}"
+							echo "set -q GHCUP_INSTALL_BASE_PREFIX[1]; or set GHCUP_INSTALL_BASE_PREFIX \$HOME" >> "${GHCUP_PROFILE_FILE}"
+							echo "test -f $GHCUP_DIR/env ; and set -gx PATH \$HOME/.cabal/bin $GHCUP_BIN \$PATH" >> "${GHCUP_PROFILE_FILE}"
+						fi
 						break ;;
-					*)
-						echo "[ -f \"\${GHCUP_INSTALL_BASE_PREFIX:=\$HOME}/.ghcup/env\" ] && source \"\${GHCUP_INSTALL_BASE_PREFIX:=\$HOME}/.ghcup/env\"" >> "${GHCUP_PROFILE_FILE}"
+					bash)
+						if ! grep -q "ghcup-env" "${GHCUP_PROFILE_FILE}" ; then
+							echo "[ -f \"${GHCUP_DIR}/env\" ] && source \"${GHCUP_DIR}/env\" # ghcup-env" >> "${GHCUP_PROFILE_FILE}"
+						fi
+						case "$(uname -s)" in
+							"Darwin"|"darwin")
+								if ! grep -q "ghcup-env" "${HOME}/.bash_profile" ; then
+									echo "[[ -f ~/.bashrc ]] && source ~/.bashrc # ghcup-env" >> "${HOME}/.bash_profile"
+								fi
+								;;
+						esac
+						break ;;
+
+					zsh)
+						if ! grep -q "ghcup-env" "${GHCUP_PROFILE_FILE}" ; then
+							echo "[ -f \"${GHCUP_DIR}/env\" ] && source \"${GHCUP_DIR}/env\" # ghcup-env" >> "${GHCUP_PROFILE_FILE}"
+						fi
 						break ;;
 				esac
                 printf "\\033[0;35m%s\\033[0m\\n" "OK! ${GHCUP_PROFILE_FILE} has been modified. Restart your terminal for the changes to take effect,"
-                printf "\\033[0;35m%s\\033[0m\\n" "or type \"source ${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/env\" to apply them in your current terminal session."
-                exit 0;;
+                printf "\\033[0;35m%s\\033[0m\\n" "or type \"source ${GHCUP_DIR}/env\" to apply them in your current terminal session."
+				_done
+                ;;
             [Nn]*)
-                exit 0;;
+                _done ;;
             *)
                 echo "Please type YES or NO and press enter.";;
         esac

cabal.ghc8103.project

@@ -0,0 +1,38 @@
+with-compiler: ghc-8.10.3
+
+packages: ./ghcup.cabal
+
+optional-packages: ./3rdparty/*/*.cabal
+
+source-repository-package
+    type: git
+    location: https://github.com/haskus/packages.git
+    tag: 80a1c5fc07f7226c424250ec17f674cd4d618f42
+    subdir: haskus-utils-types
+
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/hpath.git
+    tag: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdir: hpath-io
+
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/hpath.git
+    tag: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdir: hpath-directory
+
+optimization: 2
+
+package streamly
+    ghc-options: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16
+
+package ghcup
+    ghc-options: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16
+
+constraints: http-io-streams -brotli
+
+package libarchive
+  flags: -system-libarchive
+
+allow-newer: base, ghc-prim, template-haskell

cabal.ghc8103.project.freeze

@@ -0,0 +1,261 @@
+active-repositories: hackage.haskell.org:merge
+constraints: any.Cabal ==3.2.1.0,
+             any.HUnit ==1.6.2.0,
+             any.IfElse ==0.85,
+             any.QuickCheck ==2.14.2,
+             QuickCheck -old-random +templatehaskell,
+             any.StateVar ==1.2.1,
+             any.abstract-deque ==0.3,
+             abstract-deque -usecas,
+             any.aeson ==1.5.5.1,
+             aeson -bytestring-builder -cffi -developer -fast,
+             any.aeson-pretty ==0.8.8,
+             aeson-pretty -lib-only,
+             any.alex ==3.2.6,
+             alex +small_base,
+             any.ansi-terminal ==0.11,
+             ansi-terminal -example,
+             any.ansi-wl-pprint ==0.6.9,
+             ansi-wl-pprint -example,
+             any.array ==0.5.4.0,
+             any.ascii-string ==1.0.1.4,
+             any.assoc ==1.0.2,
+             any.async ==2.2.2,
+             async -bench,
+             any.atomic-primops ==0.8.4,
+             atomic-primops -debug,
+             any.attoparsec ==0.13.2.4,
+             attoparsec -developer,
+             any.auto-update ==0.1.6,
+             any.base ==4.14.1.0,
+             any.base-compat ==0.11.2,
+             any.base-compat-batteries ==0.11.2,
+             any.base-orphans ==0.8.4,
+             any.base16-bytestring ==1.0.1.0,
+             any.base64-bytestring ==1.2.0.1,
+             any.bifunctors ==5.5.10,
+             bifunctors +semigroups +tagged,
+             any.binary ==0.8.8.0,
+             any.blaze-builder ==0.4.2.1,
+             any.bytestring ==0.10.12.0,
+             any.bz2 ==1.0.1.0,
+             bz2 -cross +with-bzlib,
+             any.c2hs ==0.28.7,
+             c2hs +base3 -regression,
+             any.call-stack ==0.3.0,
+             any.case-insensitive ==1.2.1.0,
+             any.casing ==0.1.4.1,
+             any.cereal ==0.5.8.1,
+             cereal -bytestring-builder,
+             any.chs-cabal ==0.1.1.0,
+             any.chs-deps ==0.1.0.0,
+             chs-deps -cross,
+             any.clock ==0.8.2,
+             clock -llvm,
+             any.cmdargs ==0.10.20,
+             cmdargs +quotation -testprog,
+             any.colour ==2.3.5,
+             any.comonad ==5.0.8,
+             comonad +containers +distributive +indexed-traversable,
+             any.composition-prelude ==3.0.0.2,
+             composition-prelude -development,
+             any.concurrent-output ==1.10.12,
+             any.conduit ==1.3.4,
+             any.conduit-extra ==1.3.5,
+             any.containers ==0.6.2.1,
+             any.contravariant ==1.5.3,
+             contravariant +semigroups +statevar +tagged,
+             any.cryptohash-sha256 ==0.11.102.0,
+             cryptohash-sha256 -exe +use-cbits,
+             any.data-default-class ==0.1.2.0,
+             any.data-fix ==0.3.0,
+             any.deepseq ==1.4.4.0,
+             any.deferred-folds ==0.9.15,
+             any.directory ==1.3.6.0,
+             any.distributive ==0.6.2.1,
+             distributive +semigroups +tagged,
+             any.dlist ==1.0,
+             dlist -werror,
+             any.easy-file ==0.2.2,
+             any.errors ==2.3.0,
+             any.exceptions ==0.10.4,
+             any.fast-logger ==3.0.2,
+             any.filepath ==1.4.2.1,
+             any.focus ==1.0.2,
+             any.foldl ==1.4.10,
+             any.free ==5.1.6,
+             any.fusion-plugin-types ==0.1.0,
+             any.generic-arbitrary ==0.1.0,
+             any.generics-sop ==0.5.1.0,
+             any.ghc-boot-th ==8.10.3,
+             any.ghc-prim ==0.6.1,
+             ghcup -internal-downloader -tar -tui,
+             any.happy ==1.20.0,
+             any.hashable ==1.3.0.0,
+             hashable -examples +integer-gmp +sse2 -sse41,
+             any.haskell-src-exts ==1.23.1,
+             any.haskell-src-meta ==0.8.5,
+             any.haskus-utils-data ==1.3,
+             any.haskus-utils-types ==1.5,
+             any.haskus-utils-variant ==3.0,
+             any.heaps ==0.3.6.1,
+             any.hpath ==0.11.0,
+             any.hpath-directory ==0.14.1,
+             any.hpath-filepath ==0.10.4,
+             any.hpath-io ==0.14.1,
+             any.hpath-posix ==0.13.2,
+             any.hsc2hs ==0.68.7,
+             hsc2hs -in-ghc-tree,
+             any.hspec ==2.7.8,
+             any.hspec-core ==2.7.8,
+             any.hspec-discover ==2.7.8,
+             any.hspec-expectations ==0.8.2,
+             any.hspec-golden-aeson ==0.7.0.0,
+             any.indexed-profunctors ==0.1,
+             any.indexed-traversable ==0.1.1,
+             any.integer-gmp ==1.0.3.0,
+             any.integer-logarithms ==1.0.3.1,
+             integer-logarithms -check-bounds +integer-gmp,
+             any.language-c ==0.8.3,
+             language-c -allwarnings +iecfpextension +separatesyb +usebytestrings,
+             any.libarchive ==3.0.2.1,
+             libarchive -cross -low-memory -system-libarchive,
+             any.libyaml ==0.1.2,
+             libyaml -no-unicode -system-libyaml,
+             any.lifted-base ==0.2.3.12,
+             any.list-t ==1.0.4,
+             any.lockfree-queue ==0.2.3.1,
+             lzma -static,
+             any.math-functions ==0.3.4.1,
+             math-functions +system-erf +system-expm1,
+             any.megaparsec ==9.0.1,
+             megaparsec -dev,
+             any.microlens ==0.4.11.2,
+             any.microlens-mtl ==0.2.0.1,
+             any.microlens-th ==0.4.3.9,
+             any.mmorph ==1.1.4,
+             any.monad-control ==1.0.2.3,
+             any.monad-logger ==0.3.36,
+             monad-logger +template_haskell,
+             any.monad-loops ==0.4.3,
+             monad-loops +base4,
+             any.mono-traversable ==1.0.15.1,
+             any.mtl ==2.2.2,
+             any.mwc-random ==0.15.0.1,
+             any.network ==3.1.2.1,
+             network -devel,
+             any.old-locale ==1.0.0.7,
+             any.old-time ==1.1.0.3,
+             any.optics ==0.3,
+             any.optics-core ==0.3.0.1,
+             any.optics-extra ==0.3,
+             any.optics-th ==0.3.0.2,
+             any.optics-vl ==0.2.1,
+             any.optparse-applicative ==0.16.1.0,
+             optparse-applicative +process,
+             any.os-release ==1.0.1,
+             os-release -devel,
+             any.parallel ==3.2.2.0,
+             any.parsec ==3.1.14.0,
+             any.parser-combinators ==1.2.1,
+             parser-combinators -dev,
+             any.pretty ==1.1.3.6,
+             any.pretty-terminal ==0.1.0.0,
+             any.primitive ==0.7.0.1,
+             any.primitive-extras ==0.8,
+             any.primitive-unlifted ==0.1.3.0,
+             any.process ==1.6.9.0,
+             any.profunctors ==5.6.1,
+             any.quickcheck-arbitrary-adt ==0.3.1.0,
+             any.quickcheck-io ==0.2.0,
+             any.random ==1.2.0,
+             any.recursion-schemes ==5.2.1,
+             recursion-schemes +template-haskell,
+             any.regex-base ==0.94.0.0,
+             any.regex-posix ==0.96.0.0,
+             regex-posix -_regex-posix-clib,
+             any.resourcet ==1.2.4.2,
+             any.rts ==1.0,
+             any.safe ==0.3.19,
+             any.safe-exceptions ==0.1.7.1,
+             any.scientific ==0.3.6.2,
+             scientific -bytestring-builder -integer-simple,
+             any.semigroupoids ==5.3.5,
+             semigroupoids +comonad +containers +contravariant +distributive +tagged +unordered-containers,
+             any.setenv ==0.1.1.3,
+             any.sop-core ==0.5.0.1,
+             any.split ==0.2.3.4,
+             any.splitmix ==0.1.0.3,
+             splitmix -optimised-mixer,
+             any.stm ==2.5.0.0,
+             any.stm-chans ==3.0.0.4,
+             any.streaming-commons ==0.2.2.1,
+             streaming-commons -use-bytestring-builder,
+             any.streamly ==0.7.2,
+             streamly -debug -dev -examples -examples-sdl -fusion-plugin -has-llvm -inspection -no-fusion -streamk,
+             any.streamly-bytestring ==0.1.2,
+             any.streamly-posix ==0.1.0.1,
+             any.strict ==0.4.0.1,
+             strict +assoc,
+             any.strict-base ==0.4.0.0,
+             any.string-interpolate ==0.3.0.2,
+             string-interpolate -bytestring-builder -extended-benchmarks -text-builder,
+             any.syb ==0.7.2.1,
+             any.tagged ==0.8.6.1,
+             tagged +deepseq +transformers,
+             any.tasty ==1.3.1,
+             tasty +clock,
+             any.tasty-hunit ==0.10.0.3,
+             any.tasty-quickcheck ==0.10.1.2,
+             any.template-haskell ==2.16.0.0,
+             any.terminal-size ==0.3.2.1,
+             any.terminfo ==0.4.1.4,
+             any.text ==1.2.4.1,
+             any.text-conversions ==0.3.1,
+             any.text-short ==0.1.3,
+             text-short -asserts,
+             any.tf-random ==0.5,
+             any.th-abstraction ==0.4.2.0,
+             any.th-compat ==0.1,
+             any.th-expand-syns ==0.4.6.0,
+             any.th-lift ==0.8.2,
+             any.th-lift-instances ==0.1.18,
+             any.th-orphans ==0.13.11,
+             any.th-reify-many ==0.1.9,
+             any.these ==1.1.1.1,
+             these +assoc,
+             any.time ==1.9.3,
+             any.time-compat ==1.9.5,
+             time-compat -old-locale,
+             any.transformers ==0.5.6.2,
+             any.transformers-base ==0.4.5.2,
+             transformers-base +orphaninstances,
+             any.transformers-compat ==0.6.6,
+             transformers-compat -five +five-three -four +generic-deriving +mtl -three -two,
+             any.typed-process ==0.2.6.0,
+             any.unbounded-delays ==0.1.1.1,
+             any.unix ==2.7.2.2,
+             any.unix-bytestring ==0.3.7.3,
+             any.unix-compat ==0.5.3,
+             unix-compat -old-time,
+             any.unix-time ==0.4.7,
+             any.unliftio-core ==0.2.0.1,
+             any.unordered-containers ==0.2.13.0,
+             unordered-containers -debug,
+             any.uri-bytestring ==0.3.3.0,
+             uri-bytestring -lib-werror,
+             any.utf8-string ==1.0.2,
+             any.uuid-types ==1.0.3,
+             any.vector ==0.12.2.0,
+             vector +boundschecks -internalchecks -unsafechecks -wall,
+             any.vector-algorithms ==0.8.0.4,
+             vector-algorithms +bench +boundschecks -internalchecks -llvm +properties -unsafechecks,
+             any.versions ==4.0.2,
+             any.vty ==5.32,
+             any.wcwidth ==0.0.2,
+             wcwidth -cli +split-base,
+             any.word8 ==0.1.3,
+             any.yaml ==0.11.5.0,
+             yaml +no-examples +no-exe,
+             zlib -non-blocking-ffi -pkg-config -static
+index-state: hackage.haskell.org 2021-02-04T20:08:20Z

cabal.ghc884.project

@@ -0,0 +1,47 @@
+-- Generated by stackage-to-hackage
+
+index-state: 2020-10-24T20:53:55Z
+
+with-compiler: ghc-8.8.4
+
+packages:
+    ./
+  , 3rdparty/lzma/
+  , 3rdparty/lzma-clib/
+  , 3rdparty/zlib/
+
+source-repository-package
+    type: git
+    location: https://github.com/haskus/packages.git
+    tag: 80a1c5fc07f7226c424250ec17f674cd4d618f42
+    subdir: haskus-utils-types
+
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/hpath.git
+    tag: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdir: hpath-directory
+            hpath-io
+
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/text-conversions.git
+    tag: 9abf0e5e5664a3178367597c32db19880477a53c
+
+allow-older: *
+allow-newer: *
+
+package lzma
+    ghc-options: -O2
+
+package lzma-clib
+    ghc-options: -O2
+
+package zlib
+    ghc-options: -O2
+
+package ghcup
+    ghc-options: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16
+
+package streamly
+    ghc-options: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16

cabal.project

@@ -8,6 +8,54 @@ source-repository-package
     tag: 80a1c5fc07f7226c424250ec17f674cd4d618f42
     subdir: haskus-utils-types
 
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/hpath.git
+    tag: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdir: hpath-io
+
+source-repository-package
+    type: git
+    location: https://github.com/hasufell/hpath.git
+    tag: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdir: hpath-directory
+
+source-repository-package
+    type: git
+    location: https://github.com/well-typed/optics.git
+    tag: a21d34612bfe5a9552ff35df98d7dc6b87e57e28
+    subdir: optics-th
+
+source-repository-package
+    type: git
+    location: https://github.com/well-typed/optics.git
+    tag: a21d34612bfe5a9552ff35df98d7dc6b87e57e28
+    subdir: optics-extra
+
+source-repository-package
+    type: git
+    location: https://github.com/well-typed/optics.git
+    tag: a21d34612bfe5a9552ff35df98d7dc6b87e57e28
+    subdir: optics-core
+
+source-repository-package
+    type: git
+    location: https://github.com/well-typed/optics.git
+    tag: a21d34612bfe5a9552ff35df98d7dc6b87e57e28
+    subdir: optics
+
+source-repository-package
+    type: git
+    location: https://github.com/well-typed/generics-sop.git
+    tag: dcac01495c377bd29cf8f6dcf714f23a47edde9d
+    subdir: generics-sop
+
+source-repository-package
+    type: git
+    location: https://github.com/well-typed/generics-sop.git
+    tag: dcac01495c377bd29cf8f6dcf714f23a47edde9d
+    subdir: sop-core
+
 optimization: 2
 
 package streamly
@@ -19,6 +67,6 @@ package ghcup
 constraints: http-io-streams -brotli
 
 package libarchive
-  flags: static
+  flags: -system-libarchive
 
-allow-newer: base ghc-prim template-haskell
+allow-newer: base, ghc-prim, template-haskell, Cabal

config.yaml

@@ -0,0 +1,61 @@
+# Cache downloads in ~/.ghcup/cache
+cache: False
+# Skip tarball checksum verification
+no-verify: False
+# enable verbosity
+verbose: False
+# When to keep build directories
+keep-dirs: Errors  # Always | Never | Errors
+# Which downloader to use
+downloader: Curl   # Curl | Wget | Internal
+
+# TUI key bindings,
+# see https://hackage.haskell.org/package/vty-5.31/docs/Graphics-Vty-Input-Events.html#t:Key
+# for possible values.
+key-bindings:
+  up:
+    KUp: []
+  down:
+    KDown: []
+  quit:
+    KChar: 'q'
+  install:
+    KChar: 'i'
+  uninstall:
+    KChar: 'u'
+  set:
+    KChar: 's'
+  changelog:
+    KChar: 'c'
+  show-all:
+    KChar: 'a'
+
+# Where to get GHC/cabal/hls download info/versions from. For more detailed explanation
+# check the 'URLSource' type in the code.
+url-source:
+  ## Use the internal download uri, this is the default
+  GHCupURL: []
+
+  ## Example 1: Read download info from this location instead
+  ## Accepts file/http/https scheme
+  # OwnSource: "file:///home/jule/git/ghcup-hs/ghcup-0.0.3.yaml"
+
+  ## Example 2: Add custom tarballs to the default downloads, overwriting duplicate versions
+  # AddSource:
+    # Left:
+      # toolRequirements: {} # this is ignored
+      # ghcupDownloads:
+        # GHC:
+          # 9.10.2:
+            # viTags: []
+            # viArch:
+              # A_64:
+                # Linux_UnknownLinux:
+                  # unknown_versioning:
+                    # dlUri: https://downloads.haskell.org/~ghc/7.10.3/ghc-7.10.3-x86_64-deb8-linux.tar.bz2
+                    # dlSubdir: ghc-7.10.3
+                    # dlHash: 01cfbad8dff1e8b34a5fdca8caeaf843b56e36af919e29cd68870d2588563db5
+
+  ## Example 3: Add a custom download file to the default downloads, overwriting duplicate versions
+  # AddSource:
+    # Right: "file:///home/jule/git/ghcup-hs/ghcup-custom.yaml"

ghcup.cabal

@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               ghcup
-version:            0.1.8
+version:            0.1.12
 synopsis:           ghc toolchain installer as an exe/library
 description:
   A rewrite of the shell script ghcup, for providing
@@ -15,7 +15,7 @@ maintainer:         hasufell@posteo.de
 copyright:          Julian Ospald 2020
 category:           System
 build-type:         Simple
-extra-source-files: CHANGELOG.md
+extra-doc-files:    CHANGELOG.md
 
 source-repository head
   type:     git
@@ -72,6 +72,9 @@ common bz2
 common case-insensitive
   build-depends: case-insensitive >=1.2.1.0
 
+common casing
+  build-depends: casing >=0.1.4.1
+
 common concurrent-output
   build-depends: concurrent-output >=1.10.11
 
@@ -81,6 +84,9 @@ common containers
 common cryptohash-sha256
   build-depends: cryptohash-sha256 >= 0.11.101.0
 
+common generic-arbitrary
+  build-depends: generic-arbitrary >=0.1.0
+
 common generics-sop
   build-depends: generics-sop >=0.5
 
@@ -94,13 +100,13 @@ common hpath
   build-depends: hpath >=0.11
 
 common hpath-directory
-  build-depends: hpath-directory >=0.14
+  build-depends: hpath-directory >=0.14.1
 
 common hpath-filepath
   build-depends: hpath-filepath >=0.10.3
 
 common hpath-io
-  build-depends: hpath-io >=0.14
+  build-depends: hpath-io >=0.14.1
 
 common hpath-posix
   build-depends: hpath-posix >=0.13.2
@@ -108,11 +114,17 @@ common hpath-posix
 common http-io-streams
   build-depends: http-io-streams >=0.1.2.0
 
+common hspec
+  build-depends: hspec >=2.7.4
+
+common hspec-golden-aeson
+  build-depends: hspec-golden-aeson >=0.7
+
 common io-streams
   build-depends: io-streams >=1.5
 
 common libarchive
-  build-depends: libarchive >= 2.2.5.2
+  build-depends: libarchive >= 3.0.0.0
 
 common lzma
   build-depends: lzma >=0.0.0.3
@@ -153,6 +165,9 @@ common safe
 common safe-exceptions
   build-depends: safe-exceptions >=0.1
 
+common split
+  build-depends: split >=0.2.3.4
+
 common streamly
   build-depends: streamly >=0.7.1
 
@@ -168,9 +183,6 @@ common strict-base
 common string-interpolate
   build-depends: string-interpolate >=0.2.0.0
 
-common table-layout
-  build-depends: table-layout >=0.8
-
 common template-haskell
   build-depends: template-haskell >=2.7
 
@@ -192,6 +204,12 @@ common transformers
 common os-release
   build-depends: os-release >=1.0.0
 
+common QuickCheck
+  build-depends: QuickCheck >=2.14.1
+
+common quickcheck-arbitrary-adt
+  build-depends: quickcheck-arbitrary-adt >=0.3.1.0
+
 common unix
   build-depends: unix >=2.7
 
@@ -211,7 +229,7 @@ common vector
   build-depends: vector >=0.12
 
 common versions
-  build-depends: versions >=3.5
+  build-depends: versions >=4.0.1
 
 common vty
   build-depends: vty >=5.28.2
@@ -219,6 +237,9 @@ common vty
 common word8
   build-depends: word8 >=0.1.3
 
+common yaml
+  build-depends: yaml >=0.11.4.0
+
 common zlib
   build-depends: zlib >=0.6.2.1
 
@@ -234,8 +255,6 @@ common config
     PackageImports
     RecordWildCards
     ScopedTypeVariables
-    Strict
-    StrictData
     TupleSections
 
 library
@@ -250,6 +269,7 @@ library
     , bytestring
     , bz2
     , case-insensitive
+    , casing
     , concurrent-output
     , containers
     , cryptohash-sha256
@@ -273,6 +293,7 @@ library
     , resourcet
     , safe
     , safe-exceptions
+    , split
     , streamly
     , streamly-posix
     , streamly-bytestring
@@ -290,14 +311,13 @@ library
     , utf8-string
     , vector
     , versions
+    , vty
     , word8
+    , yaml
     , zlib
 
   exposed-modules:
     GHCup
-    GHCup.Data.GHCupDownloads
-    GHCup.Data.GHCupInfo
-    GHCup.Data.ToolRequirements
     GHCup.Download
     GHCup.Download.Utils
     GHCup.Errors
@@ -316,6 +336,10 @@ library
     GHCup.Utils.Version.QQ
     GHCup.Version
 
+  default-extensions:
+    Strict
+    StrictData
+
   -- other-modules:
   -- other-extensions:
   hs-source-dirs:  lib
@@ -356,7 +380,6 @@ executable ghcup
     , safe
     , safe-exceptions
     , string-interpolate
-    , table-layout
     , template-haskell
     , text
     , uri-bytestring
@@ -372,6 +395,10 @@ executable ghcup
   hs-source-dirs:   app/ghcup
   default-language: Haskell2010
 
+  default-extensions:
+    Strict
+    StrictData
+
   if flag(internal-downloader)
     cpp-options:     -DINTERNAL_DOWNLOADER
 
@@ -404,15 +431,16 @@ executable ghcup-gen
     , optics
     , optparse-applicative
     , pretty-terminal
+    , regex-posix
     , resourcet
     , safe-exceptions
     , string-interpolate
-    , table-layout
     , text
     , transformers
     , uri-bytestring
     , utf8-string
     , versions
+    , yaml
 
   --
   main-is:          Main.hs
@@ -425,8 +453,25 @@ executable ghcup-gen
   default-language: Haskell2010
 
 test-suite ghcup-test
-  default-language: Haskell2010
+  import:
+    config
+    , base
+    , bytestring
+    , containers
+    , QuickCheck
+    , generic-arbitrary
+    , hpath
+    , hspec
+    , hspec-golden-aeson
+    , quickcheck-arbitrary-adt
+    , text
+    , uri-bytestring
+    , versions
   type:             exitcode-stdio-1.0
+  build-depends:    ghcup
   hs-source-dirs:   test
-  main-is:          MyLibTest.hs
-  build-depends:    base >=4.12.0.0
+  main-is:          Main.hs
+  other-modules:
+                    GHCup.ArbitraryTypes
+                    GHCup.Types.JSONSpec
+                    Spec

hie.yaml

@@ -1,4 +1,19 @@
 cradle:
   cabal:
-    - path: "."
-      component: "ghcup:lib:ghcup"
+    - path: "./lib"
+      component: "lib:ghcup"
+
+    - path: "./app/ghcup/Main.hs"
+      component: "ghcup:exe:ghcup"
+
+    - path: "./app/ghcup/BrickMain.hs"
+      component: "ghcup:exe:ghcup"
+
+    - path: "./app/ghcup-gen/Main.hs"
+      component: "ghcup:exe:ghcup-gen"
+
+    - path: "./app/ghcup-gen/Validate.hs"
+      component: "ghcup:exe:ghcup-gen"
+
+    - path: "./test"
+      component: "ghcup:test:ghcup-test"

lib/GHCup/Data/GHCupInfo.hs

@@ -1,20 +0,0 @@
-{-|
-Module      : GHCup.Data.GHCupInfo
-Description :
-Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
--}
-module GHCup.Data.GHCupInfo where
-
-import           GHCup.Data.GHCupDownloads
-import           GHCup.Data.ToolRequirements
-import           GHCup.Types
-
-
-ghcupInfo :: GHCupInfo
-ghcupInfo = GHCupInfo { _toolRequirements = toolRequirements
-                      , _ghcupDownloads   = ghcupDownloads
-                      }

lib/GHCup/Data/ToolRequirements.hs

@@ -1,156 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE QuasiQuotes       #-}
-
-{-|
-Module      : GHCup.Data.ToolRequirements
-Description : Tool requirements
-Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
--}
-module GHCup.Data.ToolRequirements where
-
-import           GHCup.Types
-import           GHCup.Utils.String.QQ
-import           GHCup.Utils.Version.QQ
-
-import qualified Data.Map                      as M
-
-
-
--- | Currently 'GHC' is used for both GHC and cabal to simplify
--- this, until we need actual separation.
-toolRequirements :: ToolRequirements
-toolRequirements = M.fromList
-  [ ( GHC
-    , M.fromList
-      [ ( Nothing
-        , M.fromList
-          [ ( Linux UnknownLinux
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  []
-                  [s|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.|]
-                )
-              ]
-            )
-          , ( Linux Alpine
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  [ "curl"
-                  , "gcc"
-                  , "g++"
-                  , "gmp-dev"
-                  , "ncurses-dev"
-                  , "libffi-dev"
-                  , "make"
-                  , "xz"
-                  , "tar"
-                  , "perl"
-                  ]
-                  ""
-                )
-              ]
-            )
-          , ( Linux Ubuntu
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  [ "build-essential"
-                  , "curl"
-                  , "libffi-dev"
-                  , "libffi6"
-                  , "libgmp-dev"
-                  , "libgmp10"
-                  , "libncurses-dev"
-                  , "libncurses5"
-                  , "libtinfo5"
-                  ]
-                  ""
-                )
-              ]
-            )
-          , ( Linux Debian
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  [ "build-essential"
-                  , "curl"
-                  , "libffi-dev"
-                  , "libffi6"
-                  , "libgmp-dev"
-                  , "libgmp10"
-                  , "libncurses-dev"
-                  , "libncurses5"
-                  , "libtinfo5"
-                  ]
-                  ""
-                )
-              ]
-            )
-          , ( Linux CentOS
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  [ "gcc"
-                  , "gcc-c++"
-                  , "gmp"
-                  , "gmp-devel"
-                  , "make"
-                  , "ncurses"
-                  , "ncurses-compat-libs"
-                  , "xz"
-                  , "perl"
-                  ]
-                  ""
-                ),
-              ( Just [vers|7|]
-                , Requirements
-                  [ "gcc"
-                  , "gcc-c++"
-                  , "gmp"
-                  , "gmp-devel"
-                  , "make"
-                  , "ncurses"
-                  , "xz"
-                  , "perl"
-                  ]
-                  ""
-                )
-              ]
-            )
-          , ( Darwin
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  []
-                  "On OS X, in the course of running ghcup you will be given a dialog box to install the command line tools. Accept and the requirements will be installed for you. You will then need to run the command again."
-                )
-              ]
-            )
-          , ( FreeBSD
-            , M.fromList
-              [ ( Nothing
-                , Requirements
-                  [ "curl"
-                  , "gcc"
-                  , "gmp"
-                  , "gmake"
-                  , "ncurses"
-                  , "perl5"
-                  , "libffi"
-                  , "libiconv"
-                  ]
-                  ""
-                )
-              ]
-            )
-          ]
-        )
-      ]
-    )
-  ]

lib/GHCup/Download.hs

@@ -13,7 +13,7 @@
 Module      : GHCup.Download
 Description : Downloading
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -52,10 +52,12 @@ import           Control.Monad.Reader
 import           Control.Monad.Trans.Resource
                                          hiding ( throwM )
 import           Data.Aeson
+import           Data.Bifunctor
 import           Data.ByteString                ( ByteString )
 #if defined(INTERNAL_DOWNLOADER)
 import           Data.CaseInsensitive           ( CI )
 #endif
+import           Data.List                      ( find )
 import           Data.Maybe
 import           Data.String.Interpolate
 import           Data.Time.Clock
@@ -82,12 +84,13 @@ import qualified Crypto.Hash.SHA256            as SHA256
 import qualified Data.ByteString               as BS
 import qualified Data.ByteString.Base16        as B16
 import qualified Data.ByteString.Lazy          as L
+import qualified Data.Map.Strict               as M
 #if defined(INTERNAL_DOWNLOADER)
 import qualified Data.CaseInsensitive          as CI
-import qualified Data.Map.Strict               as M
 import qualified Data.Text                     as T
 #endif
 import qualified Data.Text.Encoding            as E
+import qualified Data.Yaml                     as Y
 import qualified System.Posix.Files.ByteString as PF
 import qualified System.Posix.RawFilePath.Directory
                                                as RD
@@ -102,8 +105,8 @@ import qualified System.Posix.RawFilePath.Directory
     ------------------
 
 
--- | Like 'getDownloads', but tries to fall back to
--- cached ~/.ghcup/cache/ghcup-<format-ver>.json
+
+-- | Downloads the download information! But only if we need to ;P
 getDownloadsF :: ( FromJSONKey Tool
                  , FromJSONKey Version
                  , FromJSON VersionInfo
@@ -112,7 +115,7 @@ getDownloadsF :: ( FromJSONKey Tool
                  , MonadLogger m
                  , MonadThrow m
                  , MonadFail m
-                 , MonadReader Settings m
+                 , MonadReader AppState m
                  )
               => URLSource
               -> Excepts
@@ -121,54 +124,54 @@ getDownloadsF :: ( FromJSONKey Tool
                    GHCupInfo
 getDownloadsF urlSource = do
   case urlSource of
-    GHCupURL ->
-      liftE
-        $ handleIO (\_ -> readFromCache)
-        $ catchE @_ @'[JSONError , FileDoesNotExistError]
-            (\(DownloadFailed _) -> readFromCache)
-        $ getDownloads urlSource
-    (OwnSource _) -> liftE $ getDownloads urlSource
-    (OwnSpec   _) -> liftE $ getDownloads urlSource
+    GHCupURL -> liftE getBase
+    (OwnSource url) -> do
+      bs <- reThrowAll DownloadFailed $ downloadBS url
+      lE' JSONDecodeError $ bimap show id $ Y.decodeEither' (L.toStrict bs)
+    (OwnSpec av) -> pure av
+    (AddSource (Left ext)) -> do
+      base <- liftE getBase
+      pure (mergeGhcupInfo base ext)
+    (AddSource (Right uri)) -> do
+      base <- liftE getBase
+      bsExt <- reThrowAll DownloadFailed $ downloadBS uri
+      ext <- lE' JSONDecodeError $ bimap show id $ Y.decodeEither' (L.toStrict bsExt)
+      pure (mergeGhcupInfo base ext)
  where
+  readFromCache :: (MonadIO m, MonadCatch m, MonadLogger m, MonadReader AppState m)
+                => Excepts '[JSONError, FileDoesNotExistError] m GHCupInfo
   readFromCache = do
+    AppState {dirs = Dirs {..}} <- lift ask
     lift $ $(logWarn)
       [i|Could not get download info, trying cached version (this may not be recent!)|]
     let path = view pathL' ghcupURL
-    cacheDir  <- liftIO $ ghcupCacheDir
-    json_file <- (cacheDir </>) <$> urlBaseName path
+    yaml_file <- (cacheDir </>) <$> urlBaseName path
     bs        <-
       handleIO' NoSuchThing
-                (\_ -> throwE $ FileDoesNotExistError (toFilePath json_file))
+                (\_ -> throwE $ FileDoesNotExistError (toFilePath yaml_file))
       $ liftIO
-      $ readFile json_file
-    lE' JSONDecodeError $ eitherDecode' bs
+      $ readFile yaml_file
+    lE' JSONDecodeError $ bimap show id $ Y.decodeEither' (L.toStrict bs)
 
+  getBase :: (MonadFail m, MonadIO m, MonadCatch m, MonadLogger m, MonadReader AppState m)
+          => Excepts '[JSONError , FileDoesNotExistError] m GHCupInfo
+  getBase =
+    handleIO (\_ -> readFromCache)
+    $ catchE @_ @'[JSONError, FileDoesNotExistError]
+        (\(DownloadFailed _) -> readFromCache)
+    $ ((reThrowAll @_ @_ @'[JSONError, DownloadFailed] DownloadFailed $ smartDl ghcupURL)
+      >>= (liftE . lE' @_ @_ @'[JSONError] JSONDecodeError . bimap show id . Y.decodeEither' . L.toStrict))
 
--- | Downloads the download information! But only if we need to ;P
-getDownloads :: ( FromJSONKey Tool
-                , FromJSONKey Version
-                , FromJSON VersionInfo
-                , MonadIO m
-                , MonadCatch m
-                , MonadLogger m
-                , MonadThrow m
-                , MonadFail m
-                , MonadReader Settings m
-                )
-             => URLSource
-             -> Excepts '[JSONError , DownloadFailed] m GHCupInfo
-getDownloads urlSource = do
-  lift $ $(logDebug) [i|Receiving download info from: #{urlSource}|]
-  case urlSource of
-    GHCupURL -> do
-      bs <- reThrowAll DownloadFailed $ smartDl ghcupURL
-      lE' JSONDecodeError $ eitherDecode' bs
-    (OwnSource url) -> do
-      bs <- reThrowAll DownloadFailed $ downloadBS url
-      lE' JSONDecodeError $ eitherDecode' bs
-    (OwnSpec av) -> pure $ av
+  mergeGhcupInfo :: GHCupInfo -- ^ base to merge with
+                 -> GHCupInfo -- ^ extension overwriting the base
+                 -> GHCupInfo
+  mergeGhcupInfo (GHCupInfo tr base) (GHCupInfo _ ext) =
+    let new = M.mapWithKey (\k a -> case M.lookup k ext of
+                                        Just a' -> M.union a' a
+                                        Nothing -> a
+                           ) base
+    in GHCupInfo tr new
 
- where
   -- First check if the json file is in the ~/.ghcup/cache dir
   -- and check it's access time. If it has been accessed within the
   -- last 5 minutes, just reuse it.
@@ -183,7 +186,7 @@ getDownloads urlSource = do
              , MonadIO m1
              , MonadFail m1
              , MonadLogger m1
-             , MonadReader Settings m1
+             , MonadReader AppState m1
              )
           => URI
           -> Excepts
@@ -198,8 +201,8 @@ getDownloads urlSource = do
                m1
                L.ByteString
   smartDl uri' = do
+    AppState {dirs = Dirs {..}} <- lift ask
     let path = view pathL' uri'
-    cacheDir  <- liftIO $ ghcupCacheDir
     json_file <- (cacheDir </>) <$> urlBaseName path
     e         <- liftIO $ doesFileExist json_file
     if e
@@ -224,7 +227,7 @@ getDownloads urlSource = do
           else -- access in less than 5 minutes, re-use file
                liftIO $ readFile json_file
       else do
-        liftIO $ createDirIfMissing newDirPerms cacheDir
+        liftIO $ createDirRecursive' cacheDir
         getModTime >>= \case
           Just modTime -> dlWithMod modTime json_file
           Nothing -> do
@@ -290,7 +293,8 @@ getDownloadInfo t v (PlatformRequest a p mv) dls = maybe
   (case p of
     -- non-musl won't work on alpine
     Linux Alpine -> with_distro <|> without_distro_ver
-    _ -> with_distro <|> without_distro_ver <|> without_distro)
+    _            -> with_distro <|> without_distro_ver <|> without_distro
+  )
 
  where
   with_distro        = distro_preview id id
@@ -298,7 +302,18 @@ getDownloadInfo t v (PlatformRequest a p mv) dls = maybe
   without_distro     = distro_preview (set _Linux UnknownLinux) (const Nothing)
 
   distro_preview f g =
-    preview (ix t % ix v % viArch % ix a % ix (f p) % ix (g mv)) dls
+    let platformVersionSpec =
+          preview (ix t % ix v % viArch % ix a % ix (f p)) dls
+        mv' = g mv
+    in  fmap snd
+          .   find
+                (\(mverRange, _) -> maybe
+                  (mv' == Nothing)
+                  (\range -> maybe False (flip versionRange range) mv')
+                  mverRange
+                )
+          .   M.toList
+          =<< platformVersionSpec
 
 
 -- | Tries to download from the given http or https url
@@ -309,7 +324,7 @@ getDownloadInfo t v (PlatformRequest a p mv) dls = maybe
 --
 -- The file must not exist.
 download :: ( MonadMask m
-            , MonadReader Settings m
+            , MonadReader AppState m
             , MonadThrow m
             , MonadLogger m
             , MonadIO m
@@ -328,7 +343,7 @@ download dli dest mfn
   scheme = view (dlUri % uriSchemeL' % schemeBSL') dli
   cp     = do
     -- destination dir must exist
-    liftIO $ hideError AlreadyExists $ createDirRecursive newDirPerms dest
+    liftIO $ createDirRecursive' dest
     destFile <- getDestFile
     fromFile <- parseAbs path
     liftIO $ copyFile fromFile destFile Strict
@@ -338,7 +353,7 @@ download dli dest mfn
     lift $ $(logInfo) [i|downloading: #{uri'}|]
 
     -- destination dir must exist
-    liftIO $ hideError AlreadyExists $ createDirRecursive newDirPerms dest
+    liftIO $ createDirRecursive' dest
     destFile <- getDestFile
 
     -- download
@@ -381,7 +396,7 @@ downloadCached :: ( MonadMask m
                   , MonadThrow m
                   , MonadLogger m
                   , MonadIO m
-                  , MonadReader Settings m
+                  , MonadReader AppState m
                   )
                => DownloadInfo
                -> Maybe (Path Rel)  -- ^ optional filename
@@ -390,15 +405,15 @@ downloadCached dli mfn = do
   cache <- lift getCache
   case cache of
     True -> do
-      cachedir <- liftIO $ ghcupCacheDir
+      AppState {dirs = Dirs {..}} <- lift ask
       fn       <- maybe (urlBaseName $ view (dlUri % pathL') dli) pure mfn
-      let cachfile = cachedir </> fn
+      let cachfile = cacheDir </> fn
       fileExists <- liftIO $ doesFileExist cachfile
       if
         | fileExists -> do
           liftE $ checkDigest dli cachfile
           pure $ cachfile
-        | otherwise -> liftE $ download dli cachedir mfn
+        | otherwise -> liftE $ download dli cacheDir mfn
     False -> do
       tmp <- lift withGHCupTmpDir
       liftE $ download dli tmp mfn
@@ -414,7 +429,7 @@ downloadCached dli mfn = do
 
 
 -- | This is used for downloading the JSON.
-downloadBS :: (MonadReader Settings m, MonadCatch m, MonadIO m, MonadLogger m)
+downloadBS :: (MonadReader AppState m, MonadCatch m, MonadIO m, MonadLogger m)
            => URI
            -> Excepts
                 '[ FileDoesNotExistError
@@ -471,12 +486,12 @@ downloadBS uri'
 #endif
 
 
-checkDigest :: (MonadIO m, MonadThrow m, MonadLogger m, MonadReader Settings m)
+checkDigest :: (MonadIO m, MonadThrow m, MonadLogger m, MonadReader AppState m)
             => DownloadInfo
             -> Path Abs
             -> Excepts '[DigestError] m ()
 checkDigest dli file = do
-  verify <- lift ask <&> (not . noVerify)
+  verify <- lift ask <&> (not . noVerify . settings)
   when verify $ do
     p' <- toFilePath <$> basename file
     lift $ $(logInfo) [i|verifying digest of: #{p'}|]

lib/GHCup/Errors.hs

@@ -7,7 +7,7 @@
 Module      : GHCup.Errors
 Description : GHCup error types
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -89,6 +89,9 @@ data JSONError = JSONDecodeError String
 data FileDoesNotExistError = FileDoesNotExistError ByteString
   deriving Show
 
+data TarDirDoesNotExist = TarDirDoesNotExist TarDir
+  deriving Show
+
 -- | File digest verification failed.
 data DigestError = DigestError Text Text
   deriving Show
@@ -149,3 +152,10 @@ data ParseError = ParseError String
   deriving Show
 
 instance Exception ParseError
+
+
+data UnexpectedListLength = UnexpectedListLength String
+  deriving Show
+
+instance Exception UnexpectedListLength
+

lib/GHCup/Platform.hs

@@ -10,7 +10,7 @@
 Module      : GHCup.Plaform
 Description : Retrieving platform information
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX

lib/GHCup/Requirements.hs

@@ -4,7 +4,7 @@
 Module      : GHCup.Requirements
 Description : Requirements utilities
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -14,8 +14,10 @@ module GHCup.Requirements where
 import           GHCup.Types
 import           GHCup.Types.JSON               ( )
 import           GHCup.Types.Optics
+import           GHCup.Version
 
 import           Control.Applicative
+import           Data.List                      ( find )
 import           Data.Maybe
 import           Optics
 import           Prelude                 hiding ( abs
@@ -23,6 +25,7 @@ import           Prelude                 hiding ( abs
                                                 , writeFile
                                                 )
 
+import qualified Data.Map.Strict               as M
 import qualified Data.Text                     as T
 
 
@@ -33,22 +36,32 @@ getCommonRequirements :: PlatformResult
                       -> ToolRequirements
                       -> Maybe Requirements
 getCommonRequirements pr tr =
-  preview (ix GHC % ix Nothing % ix (_platform pr) % ix (_distroVersion pr)) tr
-    <|> preview (ix GHC % ix Nothing % ix (_platform pr) % ix Nothing) tr
-    <|> preview
-          ( ix GHC
-          % ix Nothing
-          % ix (set _Linux UnknownLinux $ _platform pr)
-          % ix Nothing
-          )
-          tr
+  with_distro <|> without_distro_ver <|> without_distro
+ where
+  with_distro        = distro_preview _platform _distroVersion
+  without_distro_ver = distro_preview _platform (const Nothing)
+  without_distro     = distro_preview (set _Linux UnknownLinux . _platform) (const Nothing)
+
+  distro_preview f g =
+    let platformVersionSpec =
+          preview (ix GHC % ix Nothing % ix (f pr)) tr
+        mv' = g pr
+    in  fmap snd
+          .   find
+                (\(mverRange, _) -> maybe
+                  (mv' == Nothing)
+                  (\range -> maybe False (flip versionRange range) mv')
+                  mverRange
+                )
+          .   M.toList
+          =<< platformVersionSpec
 
 
 prettyRequirements :: Requirements -> T.Text
 prettyRequirements Requirements {..} =
   let d = if not . null $ _distroPKGs
         then
-          "\n  Install the following distro packages: "
+          "\n  Please install the following distro packages: "
             <> T.intercalate " " _distroPKGs
         else ""
       n = if not . T.null $ _notes then "\n  Note: " <> _notes else ""

lib/GHCup/Types.hs

@@ -6,7 +6,7 @@
 Module      : GHCup.Types
 Description : GHCup types
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -14,12 +14,15 @@ Portability : POSIX
 module GHCup.Types where
 
 import           Data.Map.Strict                ( Map )
+import           Data.List.NonEmpty             ( NonEmpty (..) )
 import           Data.Text                      ( Text )
 import           Data.Versions
 import           HPath
 import           URI.ByteString
 
+import qualified Data.Text                     as T
 import qualified GHC.Generics                  as GHC
+import qualified Graphics.Vty                  as Vty
 
 
 
@@ -44,7 +47,7 @@ data GHCupInfo = GHCupInfo
 type ToolRequirements = Map Tool ToolReqVersionSpec
 type ToolReqVersionSpec = Map (Maybe Version) PlatformReqSpec
 type PlatformReqSpec = Map Platform PlatformReqVersionSpec
-type PlatformReqVersionSpec = Map (Maybe Versioning) Requirements
+type PlatformReqVersionSpec = Map (Maybe VersionRange) Requirements
 
 
 data Requirements = Requirements
@@ -68,14 +71,15 @@ type GHCupDownloads = Map Tool ToolVersionSpec
 type ToolVersionSpec = Map Version VersionInfo
 type ArchitectureSpec = Map Architecture PlatformSpec
 type PlatformSpec = Map Platform PlatformVersionSpec
-type PlatformVersionSpec = Map (Maybe Versioning) DownloadInfo
+type PlatformVersionSpec = Map (Maybe VersionRange) DownloadInfo
 
 
 -- | An installable tool.
 data Tool = GHC
           | Cabal
           | GHCup
-  deriving (Eq, GHC.Generic, Ord, Show)
+          | HLS
+  deriving (Eq, GHC.Generic, Ord, Show, Enum, Bounded)
 
 
 -- | All necessary information of a tool version, including
@@ -86,15 +90,17 @@ data VersionInfo = VersionInfo
   , _viSourceDL  :: Maybe DownloadInfo -- ^ source tarball
   , _viArch      :: ArchitectureSpec   -- ^ descend for binary downloads per arch
   }
-  deriving (Eq, Show)
+  deriving (Eq, GHC.Generic, Show)
 
 
 -- | A tag. These are currently attached to a version of a tool.
 data Tag = Latest
          | Recommended
+         | Prerelease
          | Base PVP
+         | Old                -- ^ old version are hidden by default in TUI
          | UnknownTag String  -- ^ used for upwardscompat
-         deriving (Ord, Eq, Show) -- FIXME: manual JSON instance
+         deriving (Ord, Eq, GHC.Generic, Show) -- FIXME: manual JSON instance
 
 
 data Architecture = A_64
@@ -107,6 +113,15 @@ data Architecture = A_64
                   | A_ARM64
   deriving (Eq, GHC.Generic, Ord, Show)
 
+prettyArch :: Architecture -> String
+prettyArch A_64 = "x86_64"
+prettyArch A_32 = "i386"
+prettyArch A_PowerPC = "powerpc"
+prettyArch A_PowerPC64 = "powerpc64"
+prettyArch A_Sparc = "sparc"
+prettyArch A_Sparc64 = "sparc64"
+prettyArch A_ARM = "arm"
+prettyArch A_ARM64 = "aarch64"
 
 data Platform = Linux LinuxDistro
               -- ^ must exit
@@ -115,6 +130,11 @@ data Platform = Linux LinuxDistro
               | FreeBSD
   deriving (Eq, GHC.Generic, Ord, Show)
 
+prettyPlatfrom :: Platform -> String
+prettyPlatfrom (Linux distro) = "linux-" ++ prettyDistro distro
+prettyPlatfrom Darwin = "darwin"
+prettyPlatfrom FreeBSD = "freebsd"
+
 data LinuxDistro = Debian
                  | Ubuntu
                  | Mint
@@ -131,15 +151,28 @@ data LinuxDistro = Debian
                  -- ^ must exit
   deriving (Eq, GHC.Generic, Ord, Show)
 
+prettyDistro :: LinuxDistro -> String
+prettyDistro Debian = "debian"
+prettyDistro Ubuntu = "ubuntu"
+prettyDistro Mint= "mint"
+prettyDistro Fedora = "fedora"
+prettyDistro CentOS = "centos"
+prettyDistro RedHat = "redhat"
+prettyDistro Alpine = "alpine"
+prettyDistro AmazonLinux = "amazon"
+prettyDistro Gentoo = "gentoo"
+prettyDistro Exherbo = "exherbo"
+prettyDistro UnknownLinux = "unknown"
+
 
 -- | An encapsulation of a download. This can be used
 -- to download, extract and install a tool.
 data DownloadInfo = DownloadInfo
   { _dlUri    :: URI
-  , _dlSubdir :: Maybe (Path Rel)
+  , _dlSubdir :: Maybe TarDir
   , _dlHash   :: Text
   }
-  deriving (Eq, Show)
+  deriving (Eq, Ord, GHC.Generic, Show)
 
 
 
@@ -149,23 +182,95 @@ data DownloadInfo = DownloadInfo
     --------------
 
 
+-- | How to descend into a tar archive.
+data TarDir = RealDir (Path Rel)
+            | RegexDir String     -- ^ will be compiled to regex, the first match will "win"
+            deriving (Eq, Ord, GHC.Generic, Show)
+
+
 -- | Where to fetch GHCupDownloads from.
 data URLSource = GHCupURL
                | OwnSource URI
                | OwnSpec GHCupInfo
-               deriving Show
+               | AddSource (Either GHCupInfo URI) -- ^ merge with GHCupURL
+               deriving (GHC.Generic, Show)
 
 
+data UserSettings = UserSettings
+  { uCache       :: Maybe Bool
+  , uNoVerify    :: Maybe Bool
+  , uVerbose     :: Maybe Bool
+  , uKeepDirs    :: Maybe KeepDirs
+  , uDownloader  :: Maybe Downloader
+  , uKeyBindings :: Maybe UserKeyBindings
+  , uUrlSource   :: Maybe URLSource
+  }
+  deriving (Show, GHC.Generic)
+
+defaultUserSettings :: UserSettings
+defaultUserSettings = UserSettings Nothing Nothing Nothing Nothing Nothing Nothing Nothing
+
+data UserKeyBindings = UserKeyBindings
+  { kUp        :: Maybe Vty.Key
+  , kDown      :: Maybe Vty.Key
+  , kQuit      :: Maybe Vty.Key
+  , kInstall   :: Maybe Vty.Key
+  , kUninstall :: Maybe Vty.Key
+  , kSet       :: Maybe Vty.Key
+  , kChangelog :: Maybe Vty.Key
+  , kShowAll   :: Maybe Vty.Key
+  }
+  deriving (Show, GHC.Generic)
+
+data KeyBindings = KeyBindings
+  { bUp        :: Vty.Key
+  , bDown      :: Vty.Key
+  , bQuit      :: Vty.Key
+  , bInstall   :: Vty.Key
+  , bUninstall :: Vty.Key
+  , bSet       :: Vty.Key
+  , bChangelog :: Vty.Key
+  , bShowAll   :: Vty.Key
+  }
+  deriving (Show, GHC.Generic)
+
+defaultKeyBindings :: KeyBindings
+defaultKeyBindings = KeyBindings
+  { bUp = Vty.KUp
+  , bDown = Vty.KDown
+  , bQuit = Vty.KChar 'q'
+  , bInstall = Vty.KChar 'i'
+  , bUninstall = Vty.KChar 'u'
+  , bSet = Vty.KChar 's'
+  , bChangelog = Vty.KChar 'c'
+  , bShowAll = Vty.KChar 'a'
+  }
+
+data AppState = AppState
+  { settings :: Settings
+  , dirs :: Dirs
+  , keyBindings :: KeyBindings
+  } deriving (Show)
+
 data Settings = Settings
   { cache      :: Bool
   , noVerify   :: Bool
   , keepDirs   :: KeepDirs
   , downloader :: Downloader
   , verbose    :: Bool
+  , urlSource  :: URLSource
+  }
+  deriving (Show, GHC.Generic)
+
+data Dirs = Dirs
+  { baseDir  :: Path Abs
+  , binDir   :: Path Abs
+  , cacheDir :: Path Abs
+  , logsDir  :: Path Abs
+  , confDir  :: Path Abs
   }
   deriving Show
 
-
 data KeepDirs = Always
               | Errors
               | Never
@@ -201,6 +306,12 @@ data PlatformResult = PlatformResult
   }
   deriving (Eq, Show)
 
+prettyPlatform :: PlatformResult -> String
+prettyPlatform PlatformResult { _platform = plat, _distroVersion = Just v' }
+  = show plat <> ", " <> T.unpack (prettyV v')
+prettyPlatform PlatformResult { _platform = plat, _distroVersion = Nothing }
+  = show plat
+
 data PlatformRequest = PlatformRequest
   { _rArch     :: Architecture
   , _rPlatform :: Platform
@@ -208,6 +319,13 @@ data PlatformRequest = PlatformRequest
   }
   deriving (Eq, Show)
 
+prettyPfReq :: PlatformRequest -> String
+prettyPfReq (PlatformRequest arch plat ver) =
+  prettyArch arch ++ "-" ++ prettyPlatfrom plat ++ pver
+ where
+  pver = case ver of
+           Just v' -> "-" ++ (T.unpack $ prettyV v')
+           Nothing -> ""
 
 -- | A GHC identified by the target platform triple
 -- and the version.
@@ -227,3 +345,19 @@ prettyTVer :: GHCTargetVersion -> Text
 prettyTVer (GHCTargetVersion (Just t) v') = t <> "-" <> prettyVer v'
 prettyTVer (GHCTargetVersion Nothing  v') = prettyVer v'
 
+
+-- | A comparator and a version.
+data VersionCmp = VR_gt Versioning
+                | VR_gteq Versioning
+                | VR_lt Versioning
+                | VR_lteq Versioning
+                | VR_eq Versioning
+  deriving (Eq, GHC.Generic, Ord, Show)
+
+
+-- | A version range. Supports && and ||, but not  arbitrary
+-- combinations. This is a little simplified.
+data VersionRange = SimpleRange (NonEmpty VersionCmp) -- And
+                  | OrRange (NonEmpty VersionCmp) VersionRange
+  deriving (Eq, GHC.Generic, Ord, Show)
+

lib/GHCup/Types/JSON.hs

@@ -14,7 +14,7 @@
 Module      : GHCup.Types.JSON
 Description : GHCup JSON types/instances
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -22,24 +22,34 @@ Portability : POSIX
 module GHCup.Types.JSON where
 
 import           GHCup.Types
+import           GHCup.Utils.MegaParsec
 import           GHCup.Utils.Prelude
 
+import           Control.Applicative            ( (<|>) )
 import           Data.Aeson
 import           Data.Aeson.TH
 import           Data.Aeson.Types
+import           Data.List.NonEmpty             ( NonEmpty(..) )
 import           Data.Text.Encoding            as E
 import           Data.Versions
+import           Data.Void
 import           Data.Word8
 import           HPath
 import           URI.ByteString
+import           Text.Casing
 
 import qualified Data.ByteString               as BS
+import qualified Data.List.NonEmpty            as NE
 import qualified Data.Text                     as T
+import qualified Graphics.Vty                  as Vty
+import qualified Text.Megaparsec               as MP
+import qualified Text.Megaparsec.Char          as MPC
 
 
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } { fieldLabelModifier = removeLensFieldLabel } ''Architecture
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''LinuxDistro
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Mess
+deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''MChunk
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Platform
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''SemVer
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Tool
@@ -49,10 +59,18 @@ deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Versio
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''DownloadInfo
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''GHCupInfo
 deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Requirements
+deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''KeepDirs
+deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Downloader
+deriveJSON defaultOptions { sumEncoding = ObjectWithSingleField } ''URLSource
+deriveJSON defaultOptions { fieldLabelModifier = \str' -> maybe str' T.unpack . T.stripPrefix (T.pack "u-") . T.pack . kebab $ str' } ''UserSettings
+deriveJSON defaultOptions { fieldLabelModifier = \str' -> maybe str' T.unpack . T.stripPrefix (T.pack "k-") . T.pack . kebab $ str' } ''UserKeyBindings
+deriveJSON defaultOptions { sumEncoding = ObjectWithSingleField } ''Vty.Key
 
 instance ToJSON Tag where
   toJSON Latest             = String "Latest"
   toJSON Recommended        = String "Recommended"
+  toJSON Prerelease         = String "Prerelease"
+  toJSON Old                = String "old"
   toJSON (Base       pvp'') = String ("base-" <> prettyPVP pvp'')
   toJSON (UnknownTag x    ) = String (T.pack x)
 
@@ -60,6 +78,8 @@ instance FromJSON Tag where
   parseJSON = withText "Tag" $ \t -> case T.unpack t of
     "Latest"                             -> pure Latest
     "Recommended"                        -> pure Recommended
+    "Prerelease"                         -> pure Prerelease
+    "old"                                -> pure Old
     ('b' : 'a' : 's' : 'e' : '-' : ver') -> case pvp (T.pack ver') of
       Right x -> pure $ Base x
       Left  e -> fail . show $ e
@@ -97,10 +117,10 @@ instance ToJSONKey (Maybe Versioning) where
 
 instance FromJSONKey (Maybe Versioning) where
   fromJSONKey = FromJSONKeyTextParser $ \t ->
-    if t == T.pack "unknown_versioning" then pure Nothing else pure $ just t
+    if t == T.pack "unknown_versioning" then pure Nothing else just t
    where
     just t = case versioning t of
-      Right x -> pure x
+      Right x -> pure $ Just x
       Left  e -> fail $ "Failure in (Maybe Versioning) (FromJSONKey)" <> show e
 
 instance ToJSONKey Platform where
@@ -143,10 +163,10 @@ instance ToJSONKey (Maybe Version) where
 
 instance FromJSONKey (Maybe Version) where
   fromJSONKey = FromJSONKeyTextParser $ \t ->
-    if t == T.pack "unknown_version" then pure Nothing else pure $ just t
+    if t == T.pack "unknown_version" then pure Nothing else just t
    where
     just t = case version t of
-      Right x -> pure x
+      Right x -> pure $ Just x
       Left  e -> fail $ "Failure in (Maybe Version) (FromJSONKey)" <> show e
 
 instance ToJSON Version where
@@ -191,3 +211,116 @@ instance FromJSON (Path Rel) where
     case parseRel d of
       Right x -> pure x
       Left  e -> fail $ "Failure in HPath Rel (FromJSON)" <> show e
+
+
+instance ToJSON TarDir where
+  toJSON (RealDir  p) = toJSON p
+  toJSON (RegexDir r) = object ["RegexDir" .= r]
+
+instance FromJSON TarDir where
+  parseJSON v = realDir v <|> regexDir v
+   where
+    realDir = withText "TarDir" $ \t -> do
+      fp <- parseJSON (String t)
+      pure (RealDir fp)
+    regexDir = withObject "TarDir" $ \o -> do
+      r <- o .: "RegexDir"
+      pure $ RegexDir r
+
+
+instance ToJSON VersionCmp where
+  toJSON = String . versionCmpToText
+
+instance FromJSON VersionCmp where
+  parseJSON = withText "VersionCmp" $ \t -> do
+    case MP.parse versionCmpP "" t of
+      Right r -> pure r
+      Left  e -> fail (MP.errorBundlePretty e)
+
+versionCmpToText :: VersionCmp -> T.Text
+versionCmpToText (VR_gt   ver') = "> " <> prettyV ver'
+versionCmpToText (VR_gteq ver') = ">= " <> prettyV ver'
+versionCmpToText (VR_lt   ver') = "< " <> prettyV ver'
+versionCmpToText (VR_lteq ver') = "<= " <> prettyV ver'
+versionCmpToText (VR_eq   ver') = "== " <> prettyV ver'
+
+versionCmpP :: MP.Parsec Void T.Text VersionCmp
+versionCmpP =
+  fmap VR_gt (MP.try $ MPC.space *> MP.chunk ">" *> MPC.space *> versioningEnd)
+    <|> fmap
+          VR_gteq
+          (MP.try $ MPC.space *> MP.chunk ">=" *> MPC.space *> versioningEnd)
+    <|> fmap
+          VR_lt
+          (MP.try $ MPC.space *> MP.chunk "<" *> MPC.space *> versioningEnd)
+    <|> fmap
+          VR_lteq
+          (MP.try $ MPC.space *> MP.chunk "<=" *> MPC.space *> versioningEnd)
+    <|> fmap
+          VR_eq
+          (MP.try $ MPC.space *> MP.chunk "==" *> MPC.space *> versioningEnd)
+    <|> fmap
+          VR_eq
+          (MP.try $ MPC.space *> versioningEnd)
+
+instance ToJSON VersionRange where
+  toJSON = String . verRangeToText
+
+verRangeToText :: VersionRange -> T.Text
+verRangeToText  (SimpleRange cmps) =
+  let inner = foldr1 (\x y -> x <> " && " <> y)
+                     (versionCmpToText <$> NE.toList cmps)
+  in  "( " <> inner <> " )"
+verRangeToText (OrRange cmps range) =
+  let left  = verRangeToText $ (SimpleRange cmps)
+      right = verRangeToText range
+  in  left <> " || " <> right
+
+instance FromJSON VersionRange where
+  parseJSON = withText "VersionRange" $ \t -> do
+    case MP.parse versionRangeP "" t of
+      Right r -> pure r
+      Left  e -> fail (MP.errorBundlePretty e)
+
+versionRangeP :: MP.Parsec Void T.Text VersionRange
+versionRangeP = go <* MP.eof
+ where
+  go =
+    MP.try orParse
+      <|> MP.try (fmap SimpleRange andParse)
+      <|> (fmap (SimpleRange . pure) versionCmpP)
+
+  orParse :: MP.Parsec Void T.Text VersionRange
+  orParse =
+    (\a o -> OrRange a o)
+      <$> (MP.try andParse <|> fmap pure versionCmpP)
+      <*> (MPC.space *> MP.chunk "||" *> MPC.space *> go)
+
+  andParse :: MP.Parsec Void T.Text (NonEmpty VersionCmp)
+  andParse =
+    fmap (\h t -> h :| t)
+         (MPC.space *> MP.chunk "(" *> MPC.space *> versionCmpP)
+      <*> ( MP.try
+          $ MP.many (MPC.space *> MP.chunk "&&" *> MPC.space *> versionCmpP)
+          )
+      <*  MPC.space
+      <*  MP.chunk ")"
+      <*  MPC.space
+
+versioningEnd :: MP.Parsec Void T.Text Versioning
+versioningEnd =
+  MP.try (verP (MP.chunk " " <|> MP.chunk ")" <|> MP.chunk "&&") <* MPC.space)
+    <|> versioning'
+
+instance ToJSONKey (Maybe VersionRange) where
+  toJSONKey = toJSONKeyText $ \case
+    Just x -> verRangeToText x
+    Nothing -> "unknown_versioning"
+
+instance FromJSONKey (Maybe VersionRange)  where
+  fromJSONKey = FromJSONKeyTextParser $ \t ->
+    if t == T.pack "unknown_versioning" then pure Nothing else just t
+   where
+    just t = case MP.parse versionRangeP "" t of
+      Right x -> pure $ Just x
+      Left  e -> fail $ "Failure in (Maybe VersionRange) (FromJSONKey)" <> MP.errorBundlePretty e

lib/GHCup/Types/Optics.hs

@@ -4,7 +4,7 @@
 Module      : GHCup.Types.Optics
 Description : GHCup optics
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX

lib/GHCup/Utils.hs

@@ -10,7 +10,7 @@
 Module      : GHCup.Utils
 Description : GHCup domain specific utilities
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -36,7 +36,7 @@ import           GHCup.Utils.Prelude
 import           GHCup.Utils.String.QQ
 
 #if !defined(TAR)
-import           Codec.Archive
+import           Codec.Archive           hiding ( Directory )
 #endif
 import           Control.Applicative
 import           Control.Exception.Safe
@@ -48,7 +48,10 @@ import           Control.Monad.Logger
 import           Control.Monad.Reader
 import           Data.ByteString                ( ByteString )
 import           Data.Either
+import           Data.Foldable
 import           Data.List
+import           Data.List.NonEmpty             ( NonEmpty( (:|) ))
+import           Data.List.Split
 import           Data.Maybe
 import           Data.String.Interpolate
 import           Data.Text                      ( Text )
@@ -97,72 +100,82 @@ import qualified Text.Megaparsec               as MP
 
 
 -- | The symlink destination of a ghc tool.
-ghcLinkDestination :: ByteString -- ^ the tool, such as 'ghc', 'haddock' etc.
+ghcLinkDestination :: (MonadReader AppState m, MonadThrow m, MonadIO m)
+                   => ByteString -- ^ the tool, such as 'ghc', 'haddock' etc.
                    -> GHCTargetVersion
-                   -> ByteString
-ghcLinkDestination tool ver =
-  "../ghc/" <> E.encodeUtf8 (prettyTVer ver) <> "/bin/" <> tool
+                   -> m ByteString
+ghcLinkDestination tool ver = do
+  AppState { dirs = Dirs {..} } <- ask
+  t <- parseRel tool
+  ghcd <- ghcupGHCDir ver
+  pure (relativeSymlink binDir (ghcd </> [rel|bin|] </> t))
 
 
 -- | Removes the minor GHC symlinks, e.g. ghc-8.6.5.
-rmMinorSymlinks :: (MonadIO m, MonadLogger m) => GHCTargetVersion -> m ()
-rmMinorSymlinks GHCTargetVersion {..} = do
-  bindir <- liftIO $ ghcupBinDir
-
-  files  <- liftIO $ findFiles'
-    bindir
-    (  maybe mempty (\x -> MP.chunk (x <> "-")) _tvTarget
-    *> parseUntil1 (MP.chunk $ prettyVer _tvVersion)
-    *> (MP.chunk $ prettyVer _tvVersion)
-    *> MP.eof
-    )
+rmMinorSymlinks :: ( MonadReader AppState m
+                   , MonadIO m
+                   , MonadLogger m
+                   , MonadThrow m
+                   , MonadFail m
+                   , MonadReader AppState m
+                   )
+                => GHCTargetVersion
+                -> Excepts '[NotInstalled] m ()
+rmMinorSymlinks tv@(GHCTargetVersion {..}) = do
+  AppState { dirs = Dirs {..} } <- lift ask
 
+  files                         <- liftE $ ghcToolFiles tv
   forM_ files $ \f -> do
-    let fullF = (bindir </> f)
-    $(logDebug) [i|rm -f #{toFilePath fullF}|]
+    f_xyz <- liftIO $ parseRel (toFilePath f <> B.singleton _hyphen <> verToBS _tvVersion)
+    let fullF = (binDir </> f_xyz)
+    lift $ $(logDebug) [i|rm -f #{toFilePath fullF}|]
     liftIO $ hideError doesNotExistErrorType $ deleteFile fullF
 
 
 -- | Removes the set ghc version for the given target, if any.
-rmPlain :: (MonadLogger m, MonadThrow m, MonadFail m, MonadIO m)
-  => Maybe Text -- ^ target
+rmPlain :: ( MonadReader AppState m
+           , MonadLogger m
+           , MonadThrow m
+           , MonadFail m
+           , MonadIO m
+           )
+        => Maybe Text -- ^ target
         -> Excepts '[NotInstalled] m ()
 rmPlain target = do
-  mtv <- ghcSet target
+  AppState { dirs = Dirs {..} } <- lift ask
+  mtv                           <- lift $ ghcSet target
   forM_ mtv $ \tv -> do
-    files  <- liftE $ ghcToolFiles tv
-    bindir <- liftIO $ ghcupBinDir
+    files <- liftE $ ghcToolFiles tv
     forM_ files $ \f -> do
-      let fullF = (bindir </> f)
+      let fullF = (binDir </> f)
       lift $ $(logDebug) [i|rm -f #{toFilePath fullF}|]
       liftIO $ hideError doesNotExistErrorType $ deleteFile fullF
     -- old ghcup
-    let hdc_file = (bindir </> [rel|haddock-ghc|])
+    let hdc_file = (binDir </> [rel|haddock-ghc|])
     lift $ $(logDebug) [i|rm -f #{toFilePath hdc_file}|]
     liftIO $ hideError doesNotExistErrorType $ deleteFile hdc_file
 
 
 -- | Remove the major GHC symlink, e.g. ghc-8.6.
-rmMajorSymlinks :: (MonadThrow m, MonadLogger m, MonadIO m)
+rmMajorSymlinks :: ( MonadReader AppState m
+                   , MonadIO m
+                   , MonadLogger m
+                   , MonadThrow m
+                   , MonadFail m
+                   , MonadReader AppState m
+                   )
                 => GHCTargetVersion
-                -> m ()
-rmMajorSymlinks GHCTargetVersion {..} = do
+                -> Excepts '[NotInstalled] m ()
+rmMajorSymlinks tv@(GHCTargetVersion {..}) = do
+  AppState { dirs = Dirs {..} } <- lift ask
   (mj, mi) <- getMajorMinorV _tvVersion
   let v' = intToText mj <> "." <> intToText mi
 
-  bindir <- liftIO ghcupBinDir
-
-  files  <- liftIO $ findFiles'
-    bindir
-    (  maybe mempty (\x -> MP.chunk (x <> "-")) _tvTarget
-    *> parseUntil1 (MP.chunk v')
-    *> MP.chunk v'
-    *> MP.eof
-    )
-
+  files                         <- liftE $ ghcToolFiles tv
   forM_ files $ \f -> do
-    let fullF = (bindir </> f)
-    $(logDebug) [i|rm -f #{toFilePath fullF}|]
+    f_xyz <- liftIO $ parseRel (toFilePath f <> B.singleton _hyphen <> E.encodeUtf8 v')
+    let fullF = (binDir </> f_xyz)
+    lift $ $(logDebug) [i|rm -f #{toFilePath fullF}|]
     liftIO $ hideError doesNotExistErrorType $ deleteFile fullF
 
 
@@ -174,59 +187,61 @@ rmMajorSymlinks GHCTargetVersion {..} = do
 
 
 -- | Whethe the given GHC versin is installed.
-ghcInstalled :: GHCTargetVersion -> IO Bool
+ghcInstalled :: (MonadIO m, MonadReader AppState m, MonadThrow m) => GHCTargetVersion -> m Bool
 ghcInstalled ver = do
   ghcdir <- ghcupGHCDir ver
-  doesDirectoryExist ghcdir
+  liftIO $ doesDirectoryExist ghcdir
 
 
 -- | Whether the given GHC version is installed from source.
-ghcSrcInstalled :: GHCTargetVersion -> IO Bool
+ghcSrcInstalled :: (MonadIO m, MonadReader AppState m, MonadThrow m) => GHCTargetVersion -> m Bool
 ghcSrcInstalled ver = do
   ghcdir <- ghcupGHCDir ver
-  doesFileExist (ghcdir </> ghcUpSrcBuiltFile)
+  liftIO $ doesFileExist (ghcdir </> ghcUpSrcBuiltFile)
 
 
 -- | Whether the given GHC version is set as the current.
-ghcSet :: (MonadThrow m, MonadIO m)
+ghcSet :: (MonadReader AppState m, MonadThrow m, MonadIO m)
        => Maybe Text   -- ^ the target of the GHC version, if any
                        --  (e.g. armv7-unknown-linux-gnueabihf)
        -> m (Maybe GHCTargetVersion)
 ghcSet mtarget = do
+  AppState {dirs = Dirs {..}} <- ask
   ghc    <- parseRel $ E.encodeUtf8 (maybe "ghc" (<> "-ghc") mtarget)
-  ghcBin <- (</> ghc) <$> liftIO ghcupBinDir
+  let ghcBin = binDir </> ghc
 
   -- link destination is of the form ../ghc/<ver>/bin/ghc
   -- for old ghcup, it is ../ghc/<ver>/bin/ghc-<ver>
   liftIO $ handleIO' NoSuchThing (\_ -> pure $ Nothing) $ do
     link <- readSymbolicLink $ toFilePath ghcBin
     Just <$> ghcLinkVersion link
+
+ghcLinkVersion :: MonadThrow m => ByteString -> m GHCTargetVersion
+ghcLinkVersion bs = do
+  t <- throwEither $ E.decodeUtf8' bs
+  throwEither $ MP.parse parser "ghcLinkVersion" t
  where
-  ghcLinkVersion :: MonadThrow m => ByteString -> m GHCTargetVersion
-  ghcLinkVersion bs = do
-    t <- throwEither $ E.decodeUtf8' bs
-    throwEither $ MP.parse parser "" t
-   where
-    parser =
-      MP.chunk "../ghc/"
-        *> (do
-             r    <- parseUntil1 (MP.chunk "/")
-             rest <- MP.getInput
-             MP.setInput r
-             x <- ghcTargetVerP
-             MP.setInput rest
-             pure x
-           )
-        <* MP.chunk "/"
-        <* MP.takeRest
-        <* MP.eof
+  parser =
+      (do
+         _    <- parseUntil1 (MP.chunk "/ghc/")
+         _    <- MP.chunk "/ghc/"
+         r    <- parseUntil1 (MP.chunk "/")
+         rest <- MP.getInput
+         MP.setInput r
+         x <- ghcTargetVerP
+         MP.setInput rest
+         pure x
+       )
+      <* MP.chunk "/"
+      <* MP.takeRest
+      <* MP.eof
 
 
 -- | Get all installed GHCs by reading ~/.ghcup/ghc/<dir>.
 -- If a dir cannot be parsed, returns left.
-getInstalledGHCs :: MonadIO m => m [Either (Path Rel) GHCTargetVersion]
+getInstalledGHCs :: (MonadReader AppState m, MonadIO m) => m [Either (Path Rel) GHCTargetVersion]
 getInstalledGHCs = do
-  ghcdir <- liftIO $ ghcupGHCBaseDir
+  ghcdir <- ghcupGHCBaseDir
   fs     <- liftIO $ hideErrorDef [NoSuchThing] [] $ getDirsFiles' ghcdir
   forM fs $ \f -> case parseGHCupGHCDir f of
     Right r -> pure $ Right r
@@ -234,46 +249,211 @@ getInstalledGHCs = do
 
 
 -- | Get all installed cabals, by matching on @~\/.ghcup\/bin/cabal-*@.
-getInstalledCabals :: IO [Either (Path Rel) Version]
+getInstalledCabals :: (MonadReader AppState m, MonadIO m, MonadCatch m)
+                   => m [Either (Path Rel) Version]
 getInstalledCabals = do
-  bindir <- liftIO $ ghcupBinDir
+  AppState {dirs = Dirs {..}} <- ask
   bins   <- liftIO $ handleIO (\_ -> pure []) $ findFiles
-    bindir
+    binDir
     (makeRegexOpts compExtended execBlank ([s|^cabal-.*$|] :: ByteString))
   vs <- forM bins $ \f -> case fmap version (fmap decUTF8Safe . B.stripPrefix "cabal-" . toFilePath $ f) of
     Just (Right r) -> pure $ Right r
     Just (Left  _) -> pure $ Left f
     Nothing        -> pure $ Left f
   cs <- cabalSet -- for legacy cabal
-  pure $ maybe vs (\x -> Right x:vs) cs
+  pure $ maybe vs (\x -> nub $ Right x:vs) cs
 
 
 -- | Whether the given cabal version is installed.
-cabalInstalled :: Version -> IO Bool
+cabalInstalled :: (MonadIO m, MonadReader AppState m, MonadCatch m) => Version -> m Bool
 cabalInstalled ver = do
   vers <- fmap rights $ getInstalledCabals
   pure $ elem ver $ vers
 
 
 -- Return the currently set cabal version, if any.
-cabalSet :: (MonadIO m, MonadThrow m) => m (Maybe Version)
+cabalSet :: (MonadReader AppState m, MonadIO m, MonadThrow m, MonadCatch m) => m (Maybe Version)
 cabalSet = do
-  cabalbin <- (</> [rel|cabal|]) <$> liftIO ghcupBinDir
-  mc       <- liftIO $ handleIO (\_ -> pure Nothing) $ fmap Just $ executeOut
-    cabalbin
-    ["--numeric-version"]
-    Nothing
-  fmap join $ forM mc $ \c -> if
-             | not (B.null (_stdOut c))
-             , _exitCode c == ExitSuccess -> do
-                  let reportedVer = fst . B.spanEnd (== _lf) . _stdOut $ c
-                  case version $ decUTF8Safe reportedVer of
-                    Left  e -> throwM e
-                    Right r -> pure $ Just r
-             | otherwise -> pure Nothing
+  AppState {dirs = Dirs {..}} <- ask
+  let cabalbin = binDir </> [rel|cabal|]
+  b        <- handleIO (\_ -> pure False) $ fmap (== SymbolicLink) $ liftIO $ getFileType cabalbin
+  if
+    | b -> do
+      liftIO $ handleIO' NoSuchThing (\_ -> pure $ Nothing) $ do
+        broken <- isBrokenSymlink cabalbin
+        if broken
+          then pure Nothing
+          else do
+            link <- readSymbolicLink $ toFilePath cabalbin
+            Just <$> linkVersion link
+    | otherwise -> do -- legacy behavior
+      mc <- liftIO $ handleIO (\_ -> pure Nothing) $ fmap Just $ executeOut
+        cabalbin
+        ["--numeric-version"]
+        Nothing
+      fmap join $ forM mc $ \c -> if
+        | not (B.null (_stdOut c)), _exitCode c == ExitSuccess -> do
+          let reportedVer = fst . B.spanEnd (== _lf) . _stdOut $ c
+          case version $ decUTF8Safe reportedVer of
+            Left  e -> throwM e
+            Right r -> pure $ Just r
+        | otherwise -> pure Nothing
+ where
+  linkVersion :: MonadThrow m => ByteString -> m Version
+  linkVersion bs = do
+    t <- throwEither $ E.decodeUtf8' bs
+    throwEither $ MP.parse parser "" t
+   where
+    parser =
+      MP.chunk "cabal-" *> version'
 
 
 
+-- | Get all installed hls, by matching on
+-- @~\/.ghcup\/bin/haskell-language-server-wrapper-<\hlsver\>@.
+getInstalledHLSs :: (MonadReader AppState m, MonadIO m, MonadCatch m)
+                 => m [Either (Path Rel) Version]
+getInstalledHLSs = do
+  AppState { dirs = Dirs {..} } <- ask
+  bins                          <- liftIO $ handleIO (\_ -> pure []) $ findFiles
+    binDir
+    (makeRegexOpts compExtended
+                   execBlank
+                   ([s|^haskell-language-server-wrapper-.*$|] :: ByteString)
+    )
+  vs <- forM bins $ \f ->
+    case
+        fmap
+          version
+          (fmap decUTF8Safe . B.stripPrefix "haskell-language-server-wrapper-" . toFilePath $ f)
+      of
+        Just (Right r) -> pure $ Right r
+        Just (Left  _) -> pure $ Left f
+        Nothing        -> pure $ Left f
+  pure $ vs
+
+
+-- | Whether the given HLS version is installed.
+hlsInstalled :: (MonadIO m, MonadReader AppState m, MonadCatch m) => Version -> m Bool
+hlsInstalled ver = do
+  vers <- fmap rights $ getInstalledHLSs
+  pure $ elem ver $ vers
+
+
+
+-- Return the currently set hls version, if any.
+hlsSet :: (MonadReader AppState m, MonadIO m, MonadThrow m, MonadCatch m) => m (Maybe Version)
+hlsSet = do
+  AppState {dirs = Dirs {..}} <- ask
+  let hlsBin = binDir </> [rel|haskell-language-server-wrapper|]
+
+  liftIO $ handleIO' NoSuchThing (\_ -> pure $ Nothing) $ do
+    broken <- isBrokenSymlink hlsBin
+    if broken
+      then pure Nothing
+      else do
+        link <- readSymbolicLink $ toFilePath hlsBin
+        Just <$> linkVersion link
+ where
+  linkVersion :: MonadThrow m => ByteString -> m Version
+  linkVersion bs = do
+    t <- throwEither $ E.decodeUtf8' bs
+    throwEither $ MP.parse parser "" t
+   where
+    parser =
+      MP.chunk "haskell-language-server-wrapper-" *> version'
+
+
+-- | Return the GHC versions the currently selected HLS supports.
+hlsGHCVersions :: ( MonadReader AppState m
+                  , MonadIO m
+                  , MonadThrow m
+                  , MonadCatch m
+                  )
+               => m [Version]
+hlsGHCVersions = do
+  h                             <- hlsSet
+  vers                          <- forM h $ \h' -> do
+    bins <- hlsServerBinaries h'
+    pure $ fmap
+      (\bin ->
+        version
+          . decUTF8Safe
+          . fromJust
+          . B.stripPrefix "haskell-language-server-"
+          . head
+          . B.split _tilde
+          . toFilePath
+          $ bin
+      )
+      bins
+  pure . rights . concat . maybeToList $ vers
+
+
+-- | Get all server binaries for an hls version, if any.
+hlsServerBinaries :: (MonadReader AppState m, MonadIO m)
+                  => Version
+                  -> m [Path Rel]
+hlsServerBinaries ver = do
+  AppState { dirs = Dirs {..} } <- ask
+  liftIO $ handleIO (\_ -> pure []) $ findFiles
+    binDir
+    (makeRegexOpts
+      compExtended
+      execBlank
+      ([s|^haskell-language-server-.*~|] <> escapeVerRex ver <> [s|$|] :: ByteString
+      )
+    )
+
+
+-- | Get the wrapper binary for an hls version, if any.
+hlsWrapperBinary :: (MonadReader AppState m, MonadThrow m, MonadIO m)
+                 => Version
+                 -> m (Maybe (Path Rel))
+hlsWrapperBinary ver = do
+  AppState { dirs = Dirs {..} } <- ask
+  wrapper                       <- liftIO $ handleIO (\_ -> pure []) $ findFiles
+    binDir
+    (makeRegexOpts
+      compExtended
+      execBlank
+      ([s|^haskell-language-server-wrapper-|] <> escapeVerRex ver <> [s|$|] :: ByteString
+      )
+    )
+  case wrapper of
+    []  -> pure $ Nothing
+    [x] -> pure $ Just x
+    _   -> throwM $ UnexpectedListLength
+      "There were multiple hls wrapper binaries for a single version"
+
+
+-- | Get all binaries for an hls version, if any.
+hlsAllBinaries :: (MonadReader AppState m, MonadIO m, MonadThrow m) => Version -> m [Path Rel]
+hlsAllBinaries ver = do
+  hls     <- hlsServerBinaries ver
+  wrapper <- hlsWrapperBinary ver
+  pure (maybeToList wrapper ++ hls)
+
+
+-- | Get the active symlinks for hls.
+hlsSymlinks :: (MonadReader AppState m, MonadIO m, MonadCatch m) => m [Path Rel]
+hlsSymlinks = do
+  AppState { dirs = Dirs {..} } <- ask
+  oldSyms                       <- liftIO $ handleIO (\_ -> pure []) $ findFiles
+    binDir
+    (makeRegexOpts compExtended
+                   execBlank
+                   ([s|^haskell-language-server-.*$|] :: ByteString)
+    )
+  filterM
+    ( fmap (== SymbolicLink)
+    . liftIO
+    . getFileType
+    . (binDir </>)
+    )
+    oldSyms
+
+
 
     -----------------------------------------
     --[ Major version introspection (X.Y) ]--
@@ -283,7 +463,7 @@ cabalSet = do
 -- | Extract (major, minor) from any version.
 getMajorMinorV :: MonadThrow m => Version -> m (Int, Int)
 getMajorMinorV Version {..} = case _vChunks of
-  ([Digits x] : [Digits y] : _) -> pure (fromIntegral x, fromIntegral y)
+  ((Digits x :| []) :| ((Digits y :| []):_)) -> pure (fromIntegral x, fromIntegral y)
   _ -> throwM $ ParseError "Could not parse X.Y from version"
 
 
@@ -295,7 +475,7 @@ matchMajor v' major' minor' = case getMajorMinorV v' of
 
 -- | Get the latest installed full GHC version that satisfies X.Y.
 -- This reads `ghcupGHCBaseDir`.
-getGHCForMajor :: (MonadIO m, MonadThrow m)
+getGHCForMajor :: (MonadReader AppState m, MonadIO m, MonadThrow m)
                => Int        -- ^ major version component
                -> Int        -- ^ minor version component
                -> Maybe Text -- ^ the target triple
@@ -352,17 +532,16 @@ unpackToDir dest av = do
 #if defined(TAR)
   let untar :: MonadIO m => BL.ByteString -> Excepts '[] m ()
       untar = liftIO . Tar.unpack (toFilePath dest) . Tar.read
+
+      rf :: MonadIO m => Path Abs -> Excepts '[] m BL.ByteString
+      rf = liftIO . readFile
 #else
   let untar :: MonadIO m => BL.ByteString -> Excepts '[ArchiveResult] m ()
       untar = lEM . liftIO . runArchiveM . unpackToDirLazy (T.unpack . decUTF8Safe . toFilePath $ dest)
-#endif
 
-#if defined(TAR)
-      rf :: MonadIO m => Path Abs -> Excepts '[] m BL.ByteString
-#else
       rf :: MonadIO m => Path Abs -> Excepts '[ArchiveResult] m BL.ByteString
-#endif
       rf = liftIO . readFile
+#endif
 
   -- extract, depending on file extension
   if
@@ -378,6 +557,28 @@ unpackToDir dest av = do
     | otherwise -> throwE $ UnknownArchive fn
 
 
+intoSubdir :: (MonadLogger m, MonadIO m, MonadThrow m, MonadCatch m)
+           => Path Abs       -- ^ unpacked tar dir
+           -> TarDir         -- ^ how to descend
+           -> Excepts '[TarDirDoesNotExist] m (Path Abs)
+intoSubdir bdir tardir = case tardir of
+  RealDir pr -> do
+    whenM (fmap not . liftIO . doesDirectoryExist $ (bdir </> pr))
+          (throwE $ TarDirDoesNotExist tardir)
+    pure (bdir </> pr)
+  RegexDir r -> do
+    let rs = splitOn "/" r
+    foldlM
+      (\y x ->
+        (fmap sort . handleIO (\_ -> pure []) . liftIO . findFiles y . regex $ x) >>= \case
+          []      -> throwE $ TarDirDoesNotExist tardir
+          (p : _) -> pure (y </> p)
+      )
+      bdir
+      rs
+    where regex = makeRegexOpts compIgnoreCase execBlank
+
+
 
 
     ------------
@@ -410,16 +611,16 @@ getLatestBaseVersion av pvpVer =
 
 
     -----------------------
-    --[ Settings Getter ]--
+    --[ AppState Getter ]--
     -----------------------
 
 
-getCache :: MonadReader Settings m => m Bool
-getCache = ask <&> cache
+getCache :: MonadReader AppState m => m Bool
+getCache = ask <&> cache . settings
 
 
-getDownloader :: MonadReader Settings m => m Downloader
-getDownloader = ask <&> downloader
+getDownloader :: MonadReader AppState m => m Downloader
+getDownloader = ask <&> downloader . settings
 
 
 
@@ -440,11 +641,11 @@ urlBaseName = parseRel . snd . B.breakEnd (== _slash) . urlDecode False
 -- Returns unversioned relative files, e.g.:
 --
 --   - @["hsc2hs","haddock","hpc","runhaskell","ghc","ghc-pkg","ghci","runghc","hp2ps"]@
-ghcToolFiles :: (MonadThrow m, MonadFail m, MonadIO m)
+ghcToolFiles :: (MonadReader AppState m, MonadThrow m, MonadFail m, MonadIO m)
              => GHCTargetVersion
              -> Excepts '[NotInstalled] m [Path Rel]
 ghcToolFiles ver = do
-  ghcdir <- liftIO $ ghcupGHCDir ver
+  ghcdir <- lift $ ghcupGHCDir ver
   let bindir = ghcdir </> [rel|bin|]
 
   -- fail if ghc is not installed
@@ -493,7 +694,7 @@ ghcUpSrcBuiltFile = [rel|.ghcup_src_built|]
 
 
 -- | Calls gmake if it exists in PATH, otherwise make.
-make :: (MonadThrow m, MonadIO m, MonadReader Settings m)
+make :: (MonadThrow m, MonadIO m, MonadReader AppState m)
      => [ByteString]
      -> Maybe (Path Abs)
      -> m (Either ProcessError ())
@@ -546,31 +747,25 @@ getChangeLog dls tool (Right tag) =
 --
 --   1. the build directory, depending on the KeepDirs setting
 --   2. the install destination, depending on whether the build failed
-runBuildAction :: (Show (V e), MonadReader Settings m, MonadIO m, MonadMask m)
-               => Path Abs          -- ^ build directory
-               -> Maybe (Path Abs)  -- ^ install location (e.g. for GHC)
+runBuildAction :: (Show (V e), MonadReader AppState m, MonadIO m, MonadMask m)
+               => Path Abs          -- ^ build directory (cleaned up depending on Settings)
+               -> Maybe (Path Abs)  -- ^ dir to *always* clean up on exception
                -> Excepts e m a
                -> Excepts '[BuildFailed] m a
 runBuildAction bdir instdir action = do
-  Settings {..} <- lift ask
-  v <- flip
-      onException
-      (do
+  AppState { settings = Settings {..} } <- lift ask
+  let exAction = do
         forM_ instdir $ \dir ->
           liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive dir
         when (keepDirs == Never)
           $ liftIO
           $ hideError doesNotExistErrorType
           $ deleteDirRecursive bdir
-      )
+  v <-
+    flip onException exAction
     $ catchAllE
         (\es -> do
-          forM_ instdir $ \dir ->
-            liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive dir
-          when (keepDirs == Never)
-            $ liftIO
-            $ hideError doesNotExistErrorType
-            $ deleteDirRecursive bdir
+          exAction
           throwE (BuildFailed bdir es)
         )
     $ action
@@ -578,3 +773,25 @@ runBuildAction bdir instdir action = do
   when (keepDirs == Never || keepDirs == Errors) $ liftIO $ deleteDirRecursive
     bdir
   pure v
+
+
+-- | More permissive version of 'createDirRecursive'. This doesn't
+-- error when the destination is a symlink to a directory.
+createDirRecursive' :: Path b -> IO ()
+createDirRecursive' p =
+  handleIO (\e -> if isAlreadyExistsError e then isSymlinkDir e else throwIO e)
+    . createDirRecursive newDirPerms
+    $ p
+
+ where
+  isSymlinkDir e = do
+    ft <- getFileType p
+    case ft of
+      SymbolicLink -> do
+        rp <- canonicalizePath p
+        rft <- getFileType rp
+        case rft of
+          Directory -> pure ()
+          _ -> throwIO e
+      _ -> throwIO e
+

lib/GHCup/Utils/Dirs.hs

@@ -1,4 +1,6 @@
+{-# LANGUAGE DataKinds             #-}
 {-# LANGUAGE OverloadedStrings     #-}
+{-# LANGUAGE FlexibleContexts      #-}
 {-# LANGUAGE QuasiQuotes           #-}
 {-# LANGUAGE ViewPatterns          #-}
 
@@ -6,14 +8,25 @@
 Module      : GHCup.Utils.Dirs
 Description : Definition of GHCup directories
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
 -}
-module GHCup.Utils.Dirs where
+module GHCup.Utils.Dirs
+  ( getDirs
+  , ghcupConfigFile
+  , ghcupGHCBaseDir
+  , ghcupGHCDir
+  , mkGhcupTmpDir
+  , parseGHCupGHCDir
+  , relativeSymlink
+  , withGHCupTmpDir
+  )
+where
 
 
+import           GHCup.Errors
 import           GHCup.Types
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.MegaParsec
@@ -24,7 +37,11 @@ import           Control.Exception.Safe
 import           Control.Monad
 import           Control.Monad.Reader
 import           Control.Monad.Trans.Resource
+import           Data.Bifunctor
+import           Data.ByteString                ( ByteString )
 import           Data.Maybe
+import           GHC.IO.Exception               ( IOErrorType(NoSuchThing) )
+import           Haskus.Utils.Variant.Excepts
 import           HPath
 import           HPath.IO
 import           Optics
@@ -35,43 +52,169 @@ import           Prelude                 hiding ( abs
 import           System.Posix.Env.ByteString    ( getEnv
                                                 , getEnvDefault
                                                 )
+import           System.Posix.FilePath   hiding ( (</>) )
 import           System.Posix.Temp.ByteString   ( mkdtemp )
 
+import qualified Data.ByteString.Lazy          as L
 import qualified Data.ByteString.UTF8          as UTF8
 import qualified Data.Text.Encoding            as E
+import qualified Data.Yaml                     as Y
 import qualified System.Posix.FilePath         as FP
 import qualified System.Posix.User             as PU
 import qualified Text.Megaparsec               as MP
 
 
 
+    ------------------------------
+    --[ GHCup base directories ]--
+    ------------------------------
+
+
+-- | ~/.ghcup by default
+--
+-- If 'GHCUP_USE_XDG_DIRS' is set (to anything),
+-- then uses 'XDG_DATA_HOME/ghcup' as per xdg spec.
+ghcupBaseDir :: IO (Path Abs)
+ghcupBaseDir = do
+  xdg <- useXDG
+  if xdg
+    then do
+      bdir <- getEnv "XDG_DATA_HOME" >>= \case
+        Just r  -> parseAbs r
+        Nothing -> do
+          home <- liftIO getHomeDirectory
+          pure (home </> [rel|.local/share|])
+      pure (bdir </> [rel|ghcup|])
+    else do
+      bdir <- getEnv "GHCUP_INSTALL_BASE_PREFIX" >>= \case
+        Just r  -> parseAbs r
+        Nothing -> liftIO getHomeDirectory
+      pure (bdir </> [rel|.ghcup|])
+
+
+-- | ~/.ghcup by default
+--
+-- If 'GHCUP_USE_XDG_DIRS' is set (to anything),
+-- then uses 'XDG_CONFIG_HOME/ghcup' as per xdg spec.
+ghcupConfigDir :: IO (Path Abs)
+ghcupConfigDir = do
+  xdg <- useXDG
+  if xdg
+    then do
+      bdir <- getEnv "XDG_CONFIG_HOME" >>= \case
+        Just r  -> parseAbs r
+        Nothing -> do
+          home <- liftIO getHomeDirectory
+          pure (home </> [rel|.config|])
+      pure (bdir </> [rel|ghcup|])
+    else do
+      bdir <- getEnv "GHCUP_INSTALL_BASE_PREFIX" >>= \case
+        Just r  -> parseAbs r
+        Nothing -> liftIO getHomeDirectory
+      pure (bdir </> [rel|.ghcup|])
+
+
+-- | If 'GHCUP_USE_XDG_DIRS' is set (to anything),
+-- then uses 'XDG_BIN_HOME' env var or defaults to '~/.local/bin'
+-- (which, sadly is not strictly xdg spec).
+ghcupBinDir :: IO (Path Abs)
+ghcupBinDir = do
+  xdg <- useXDG
+  if xdg
+    then do
+      getEnv "XDG_BIN_HOME" >>= \case
+        Just r  -> parseAbs r
+        Nothing -> do
+          home <- liftIO getHomeDirectory
+          pure (home </> [rel|.local/bin|])
+    else ghcupBaseDir <&> (</> [rel|bin|])
+
+
+-- | Defaults to '~/.ghcup/cache'.
+--
+-- If 'GHCUP_USE_XDG_DIRS' is set (to anything),
+-- then uses 'XDG_CACHE_HOME/ghcup' as per xdg spec.
+ghcupCacheDir :: IO (Path Abs)
+ghcupCacheDir = do
+  xdg <- useXDG
+  if xdg
+    then do
+      bdir <- getEnv "XDG_CACHE_HOME" >>= \case
+        Just r  -> parseAbs r
+        Nothing -> do
+          home <- liftIO getHomeDirectory
+          pure (home </> [rel|.cache|])
+      pure (bdir </> [rel|ghcup|])
+    else ghcupBaseDir <&> (</> [rel|cache|])
+
+
+-- | Defaults to '~/.ghcup/logs'.
+--
+-- If 'GHCUP_USE_XDG_DIRS' is set (to anything),
+-- then uses 'XDG_CACHE_HOME/ghcup/logs' as per xdg spec.
+ghcupLogsDir :: IO (Path Abs)
+ghcupLogsDir = do
+  xdg <- useXDG
+  if xdg
+    then do
+      bdir <- getEnv "XDG_CACHE_HOME" >>= \case
+        Just r  -> parseAbs r
+        Nothing -> do
+          home <- liftIO getHomeDirectory
+          pure (home </> [rel|.cache|])
+      pure (bdir </> [rel|ghcup/logs|])
+    else ghcupBaseDir <&> (</> [rel|logs|])
+
+
+getDirs :: IO Dirs
+getDirs = do
+  baseDir  <- ghcupBaseDir
+  binDir   <- ghcupBinDir
+  cacheDir <- ghcupCacheDir
+  logsDir  <- ghcupLogsDir
+  confDir  <- ghcupConfigDir
+  pure Dirs { .. }
+
+
+
+    -------------------
+    --[ GHCup files ]--
+    -------------------
+
+
+ghcupConfigFile :: (MonadIO m)
+                => Excepts '[JSONError] m UserSettings
+ghcupConfigFile = do
+  confDir <- liftIO $ ghcupConfigDir
+  let file = confDir </> [rel|config.yaml|]
+  bs <- liftIO $ handleIO' NoSuchThing (\_ -> pure $ Nothing) $ fmap Just $ readFile file 
+  case bs of
+      Nothing -> pure defaultUserSettings
+      Just bs' -> lE' JSONDecodeError . bimap show id . Y.decodeEither' . L.toStrict $ bs'
+
+
     -------------------------
     --[ GHCup directories ]--
     -------------------------
 
 
--- | ~/.ghcup by default
-ghcupBaseDir :: IO (Path Abs)
-ghcupBaseDir = do
-  bdir <- getEnv "GHCUP_INSTALL_BASE_PREFIX" >>= \case
-    Just r  -> parseAbs r
-    Nothing -> liftIO getHomeDirectory
-  pure (bdir </> [rel|.ghcup|])
-
-
 -- | ~/.ghcup/ghc by default.
-ghcupGHCBaseDir :: IO (Path Abs)
-ghcupGHCBaseDir = ghcupBaseDir <&> (</> [rel|ghc|])
+ghcupGHCBaseDir :: (MonadReader AppState m) => m (Path Abs)
+ghcupGHCBaseDir = do
+  AppState { dirs = Dirs {..} } <- ask
+  pure (baseDir </> [rel|ghc|])
 
 
 -- | Gets '~/.ghcup/ghc/<ghcupGHCDir>'.
 -- The dir may be of the form
 --   * armv7-unknown-linux-gnueabihf-8.8.3
 --   * 8.8.4
-ghcupGHCDir :: GHCTargetVersion -> IO (Path Abs)
+ghcupGHCDir :: (MonadReader AppState m, MonadThrow m)
+            => GHCTargetVersion
+            -> m (Path Abs)
 ghcupGHCDir ver = do
-  ghcbasedir <- ghcupGHCBaseDir
-  verdir     <- parseRel $ E.encodeUtf8 (prettyTVer ver)
+  ghcbasedir    <- ghcupGHCBaseDir
+  verdir        <- parseRel $ E.encodeUtf8 (prettyTVer ver)
   pure (ghcbasedir </> verdir)
 
 
@@ -82,16 +225,6 @@ parseGHCupGHCDir (toFilePath -> f) = do
   throwEither $ MP.parse ghcTargetVerP "" fp
 
 
-ghcupBinDir :: IO (Path Abs)
-ghcupBinDir = ghcupBaseDir <&> (</> [rel|bin|])
-
-ghcupCacheDir :: IO (Path Abs)
-ghcupCacheDir = ghcupBaseDir <&> (</> [rel|cache|])
-
-ghcupLogsDir :: IO (Path Abs)
-ghcupLogsDir = ghcupBaseDir <&> (</> [rel|logs|])
-
-
 mkGhcupTmpDir :: (MonadThrow m, MonadIO m) => m (Path Abs)
 mkGhcupTmpDir = do
   tmpdir <- liftIO $ getEnvDefault "TMPDIR" "/tmp"
@@ -103,6 +236,8 @@ withGHCupTmpDir :: (MonadResource m, MonadThrow m, MonadIO m) => m (Path Abs)
 withGHCupTmpDir = snd <$> allocate mkGhcupTmpDir deleteDirRecursive
 
 
+
+
     --------------
     --[ Others ]--
     --------------
@@ -116,3 +251,23 @@ getHomeDirectory = do
     Nothing -> do
       h <- PU.homeDirectory <$> (PU.getEffectiveUserID >>= PU.getUserEntryForID)
       parseAbs $ UTF8.fromString h -- this is a guess
+
+
+useXDG :: IO Bool
+useXDG = isJust <$> getEnv "GHCUP_USE_XDG_DIRS"
+
+
+relativeSymlink :: Path Abs  -- ^ the path in which to create the symlink
+                -> Path Abs  -- ^ the symlink destination
+                -> ByteString
+relativeSymlink (toFilePath -> p1) (toFilePath -> p2) =
+  let d1      = splitDirectories p1
+      d2      = splitDirectories p2
+      common  = takeWhile (\(x, y) -> x == y) $ zip d1 d2
+      cPrefix = drop (length common) d1
+  in  joinPath (replicate (length cPrefix) "..")
+        <> joinPath ("/" : (drop (length common) d2))
+
+
+
+

lib/GHCup/Utils/File.hs

@@ -2,12 +2,13 @@
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TemplateHaskell   #-}
+{-# LANGUAGE ViewPatterns      #-}
 
 {-|
 Module      : GHCup.Utils.File
 Description : File and unix APIs
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -17,7 +18,6 @@ Some of these functions use sophisticated logging.
 -}
 module GHCup.Utils.File where
 
-import           GHCup.Utils.Dirs
 import           GHCup.Utils.Prelude
 import           GHCup.Types
 
@@ -26,6 +26,7 @@ import           Control.Concurrent.Async
 import           Control.Exception              ( evaluate )
 import           Control.Exception.Safe
 import           Control.Monad
+import           Control.Monad.Logger
 import           Control.Monad.Reader
 import           Control.Monad.Trans.State.Strict
 import           Data.ByteString                ( ByteString )
@@ -34,6 +35,7 @@ import           Data.Functor
 import           Data.IORef
 import           Data.Maybe
 import           Data.Sequence                  ( Seq, (|>) )
+import           Data.String.Interpolate
 import           Data.Text                      ( Text )
 import           Data.Void
 import           Data.Word8
@@ -47,6 +49,7 @@ import           System.IO.Error
 import           System.Posix.Directory.ByteString
 import           System.Posix.FD               as FD
 import           System.Posix.FilePath   hiding ( (</>) )
+import           System.Posix.Files.ByteString
 import           System.Posix.Foreign           ( oExcl )
 import "unix"    System.Posix.IO.ByteString
                                          hiding ( openFd )
@@ -114,7 +117,7 @@ executeOut path args chdir = captureOutStreams $ do
   SPPB.executeFile (toFilePath path) True args Nothing
 
 
-execLogged :: (MonadReader Settings m, MonadIO m, MonadThrow m)
+execLogged :: (MonadReader AppState m, MonadIO m, MonadThrow m)
            => ByteString       -- ^ thing to execute
            -> Bool             -- ^ whether to search PATH for the thing
            -> [ByteString]     -- ^ args for the thing
@@ -123,9 +126,8 @@ execLogged :: (MonadReader Settings m, MonadIO m, MonadThrow m)
            -> Maybe [(ByteString, ByteString)] -- ^ optional environment
            -> m (Either ProcessError ())
 execLogged exe spath args lfile chdir env = do
-  Settings {..} <- ask
-  ldir          <- liftIO ghcupLogsDir
-  logfile       <- (ldir </>) <$> parseRel (toFilePath lfile <> ".log")
+  AppState { settings = Settings {..}, dirs = Dirs {..} } <- ask
+  logfile       <- (logsDir </>) <$> parseRel (toFilePath lfile <> ".log")
   liftIO $ bracket (createFile (toFilePath logfile) newFilePerms)
                    closeFd
                    (action verbose)
@@ -377,7 +379,7 @@ toProcessError :: ByteString
                -> Maybe ProcessStatus
                -> Either ProcessError ()
 toProcessError exe args mps = case mps of
-  Just (SPPB.Exited (ExitFailure i)) -> Left $ NonZeroExit i exe args
+  Just (SPPB.Exited (ExitFailure xi)) -> Left $ NonZeroExit xi exe args
   Just (SPPB.Exited ExitSuccess    ) -> Right ()
   Just (Terminated _ _             ) -> Left $ PTerminated exe args
   Just (Stopped _                  ) -> Left $ PStopped exe args
@@ -427,3 +429,27 @@ findFiles' path parser = do
                              Right p' -> isJust $ MP.parseMaybe parser p')
     $ dirContentsStream dirStream
   pure $ join $ fmap parseRel f
+
+
+isBrokenSymlink :: Path Abs -> IO Bool
+isBrokenSymlink p =
+  handleIO
+      (\e -> if ioeGetErrorType e == NoSuchThing then pure True else throwIO e)
+    $ do
+        _ <- canonicalizePath p
+        pure False
+
+
+chmod_755 :: (MonadLogger m, MonadIO m) => Path a -> m ()
+chmod_755 (toFilePath -> fp) = do
+  let exe_mode =
+          nullFileMode
+            `unionFileModes` ownerExecuteMode
+            `unionFileModes` ownerReadMode
+            `unionFileModes` ownerWriteMode
+            `unionFileModes` groupExecuteMode
+            `unionFileModes` groupReadMode
+            `unionFileModes` otherExecuteMode
+            `unionFileModes` otherReadMode
+  $(logDebug) [i|chmod 755 #{fp}|]
+  liftIO $ setFileMode fp exe_mode

lib/GHCup/Utils/Logger.hs

@@ -1,10 +1,11 @@
 {-# LANGUAGE QuasiQuotes           #-}
+{-# LANGUAGE FlexibleContexts      #-}
 
 {-|
 Module      : GHCup.Utils.Logger
 Description : logger definition
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -13,9 +14,12 @@ Here we define our main logger.
 -}
 module GHCup.Utils.Logger where
 
+import           GHCup.Types
 import           GHCup.Utils
 
 import           Control.Monad
+import           Control.Monad.IO.Class
+import           Control.Monad.Reader
 import           Control.Monad.Logger
 import           HPath
 import           HPath.IO
@@ -61,11 +65,12 @@ myLoggerT LoggerConfig {..} loggingt = runLoggingT loggingt mylogger
     rawOutter outr
 
 
-initGHCupFileLogging :: Path Rel -> IO (Path Abs)
+initGHCupFileLogging :: (MonadIO m, MonadReader AppState m) => Path Rel -> m (Path Abs)
 initGHCupFileLogging context = do
-  logs <- ghcupLogsDir
-  let logfile = logs </> context
-  createDirIfMissing newDirPerms logs
-  hideError doesNotExistErrorType $ deleteFile logfile
-  createRegularFile newFilePerms logfile
-  pure logfile
+  AppState {dirs = Dirs {..}} <- ask
+  let logfile = logsDir </> context
+  liftIO $ do
+    createDirRecursive' logsDir
+    hideError doesNotExistErrorType $ deleteFile logfile
+    createRegularFile newFilePerms logfile
+    pure logfile

lib/GHCup/Utils/MegaParsec.hs

@@ -5,7 +5,7 @@
 Module      : GHCup.Utils.MegaParsec
 Description : MegaParsec utilities
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -25,6 +25,7 @@ import           Data.Text                      ( Text )
 import           Data.Versions
 import           Data.Void
 
+import qualified Data.List.NonEmpty            as NE
 import qualified Data.Text                     as T
 import qualified Text.Megaparsec               as MP
 
@@ -73,13 +74,13 @@ ghcTargetBinP t =
 ghcTargetVerP :: MP.Parsec Void Text GHCTargetVersion
 ghcTargetVerP =
   (\x y -> GHCTargetVersion x y)
-    <$> (MP.try (Just <$> (parseUntil1 (MP.chunk "-" *> verP)) <* MP.chunk "-")
+    <$> (MP.try (Just <$> (parseUntil1 (MP.chunk "-" *> verP')) <* MP.chunk "-")
         <|> (flip const Nothing <$> mempty)
         )
     <*> (version' <* MP.eof)
  where
-  verP :: MP.Parsec Void Text Text
-  verP = do
+  verP' :: MP.Parsec Void Text Text
+  verP' = do
     v <- version'
     let startsWithDigists =
           and
@@ -90,7 +91,22 @@ ghcTargetVerP =
                   (Digits _) -> True
                   (Str    _) -> False
                 )
+            . fmap NE.toList
+            . NE.toList
             $ (_vChunks v)
     if startsWithDigists && not (isJust (_vEpoch v))
       then pure $ prettyVer v
       else fail "Oh"
+
+
+verP :: MP.Parsec Void Text Text -> MP.Parsec Void Text Versioning
+verP suffix = do
+  ver <- parseUntil suffix
+  if T.null ver
+    then fail "empty version"
+    else do
+      rest <- MP.getInput
+      MP.setInput ver
+      v <- versioning'
+      MP.setInput rest
+      pure v

lib/GHCup/Utils/Prelude.hs

@@ -12,7 +12,7 @@
 Module      : GHCup.Utils.Prelude
 Description : MegaParsec utilities
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -31,11 +31,13 @@ import           Data.ByteString                ( ByteString )
 import           Data.String
 import           Data.Text                      ( Text )
 import           Data.Versions
+import           Data.Word8
 import           Haskus.Utils.Types.List
 import           Haskus.Utils.Variant.Excepts
 import           System.IO.Error
 import           System.Posix.Env.ByteString    ( getEnvironment )
 
+import qualified Data.ByteString               as B
 import qualified Data.ByteString.Lazy          as L
 import qualified Data.Strict.Maybe             as S
 import qualified Data.Text                     as T
@@ -275,3 +277,13 @@ decUTF8Safe = E.decodeUtf8With E.lenientDecode
 
 decUTF8Safe' :: L.ByteString -> Text
 decUTF8Safe' = TL.toStrict . TLE.decodeUtf8With E.lenientDecode
+
+
+-- | Escape a version for use in regex
+escapeVerRex :: Version -> ByteString
+escapeVerRex = B.pack . go . B.unpack . verToBS
+ where
+  go [] = []
+  go (x : xs) | x == _period = [_backslash, _period] ++ go xs
+              | otherwise    = x : go xs
+

lib/GHCup/Utils/String/QQ.hs

@@ -4,7 +4,7 @@
 Module      : GHCup.Utils.String.QQ
 Description : String quasi quoters
 Copyright   : (c) Audrey Tang <audreyt@audreyt.org> 2019, Julian Ospald <hasufell@posteo.de> 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX

lib/GHCup/Utils/Version/QQ.hs

@@ -11,7 +11,7 @@
 Module      : GHCup.Utils.Version.QQ
 Description : Version quasi-quoters
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -42,6 +42,8 @@ deriving instance Data SemVer
 deriving instance Lift SemVer
 deriving instance Data Mess
 deriving instance Lift Mess
+deriving instance Data MChunk
+deriving instance Lift MChunk
 deriving instance Data PVP
 deriving instance Lift PVP
 deriving instance Lift VSep

lib/GHCup/Version.hs

@@ -3,9 +3,9 @@
 
 {-|
 Module      : GHCup.Version
-Description : Static version information
+Description : Version information and version handling.
 Copyright   : (c) Julian Ospald, 2020
-License     : GPL-3
+License     : LGPL-3.0
 Maintainer  : hasufell@hasufell.de
 Stability   : experimental
 Portability : POSIX
@@ -13,6 +13,7 @@ Portability : POSIX
 module GHCup.Version where
 
 import           GHCup.Utils.Version.QQ
+import           GHCup.Types
 
 import           Data.Versions
 import           URI.ByteString
@@ -20,14 +21,27 @@ import           URI.ByteString.QQ
 
 import qualified Data.Text                     as T
 
--- | This reflects the API version of the JSON.
+-- | This reflects the API version of the YAML.
 ghcupURL :: URI
-ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.2.json|]
+ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.4.yaml|]
 
--- | The curren ghcup version.
+-- | The current ghcup version.
 ghcUpVer :: PVP
-ghcUpVer = [pver|0.1.8|]
+ghcUpVer = [pver|0.1.12|]
 
 -- | ghcup version as numeric string.
 numericVer :: String
 numericVer = T.unpack . prettyPVP $ ghcUpVer
+
+versionCmp :: Versioning -> VersionCmp -> Bool
+versionCmp ver1 (VR_gt ver2)   = ver1 > ver2
+versionCmp ver1 (VR_gteq ver2) = ver1 >= ver2
+versionCmp ver1 (VR_lt ver2)   = ver1 < ver2
+versionCmp ver1 (VR_lteq ver2) = ver1 <= ver2
+versionCmp ver1 (VR_eq ver2)   = ver1 == ver2
+
+versionRange :: Versioning -> VersionRange -> Bool
+versionRange ver' (SimpleRange cmps) = and $ fmap (versionCmp ver') cmps
+versionRange ver' (OrRange cmps range) = 
+  versionRange ver' (SimpleRange cmps) || versionRange ver' range
+

stack.yaml

@@ -0,0 +1,72 @@
+resolver: lts-16.17
+
+packages:
+  - .
+
+extra-deps:
+  - 3rdparty/lzma
+  - 3rdparty/lzma-clib
+  - 3rdparty/zlib
+
+  - git: https://github.com/haskus/packages.git
+    commit: 80a1c5fc07f7226c424250ec17f674cd4d618f42
+    subdirs:
+      - haskus-utils-types
+
+  - git: https://github.com/hasufell/hpath.git
+    commit: bf6d28cf989b70286e12fecc183d5bbf5454a1a2
+    subdirs:
+      - hpath-io
+      - hpath-directory
+
+  - git: https://github.com/hasufell/text-conversions.git
+    commit: 9abf0e5e5664a3178367597c32db19880477a53c
+
+  - IfElse-0.85@sha256:6939b94acc6a55f545f63a168a349dd2fbe4b9a7cca73bf60282db5cc6aa47d2,445
+  - QuickCheck-2.14.1@sha256:01e46d7b0a8d3148288ec977625f62d5516ebb5031a50c63f0453863301b4a79,7736
+  - ascii-string-1.0.1.4@sha256:fa34f1d9ba57e8e89c0d4c9cef5e01ba32cb2d4373d13f92dcc0b531a6c6749b,2582
+  - base64-bytestring-1.1.0.0@sha256:190264fef9e65d9085f00ccda419137096d1dc94777c58272bc96821dc7f37c3,2334
+  - brick-0.55@sha256:f98736eca0cd694837062e06da4655eed969d53b789dfd919716e9b6f5b4c5ce,15858
+  - brotli-0.0.0.0@sha256:2bf383a4cd308745740986be0b18381c5a0784393fe69b91456aacb2d603de46,2964
+  - brotli-streams-0.0.0.0@sha256:1af1e22f67b8bfd6ad0d05e61825e7a178d738f689ebbb21c1aab5f1bbcae176,2331
+  - chs-cabal-0.1.1.0@sha256:20ec6a9fb5ab6991f1a4adf157c537bd5d3b98d08d3c09c387c954c7c50bd011,1153
+  - chs-deps-0.1.0.0@sha256:0cdada6d2c682c41b20331b8c63c2ecfc7e806928585195fd544c9d41f3074fd,2496
+  - composition-prelude-3.0.0.0@sha256:7407835ce8c1e0e2fd6febd25391b12989b216773e685e3cf95bd89072af0ecc,1149
+  - haskus-utils-data-1.3@sha256:f62c4e49021b463185d043f7b69c727b63af641a71d7edd582d9f4f98e80e500,1466
+  - haskus-utils-variant-3.0@sha256:8d51e45d3b664e61ccc25a58b37c0ccc4ee7537138b9fee21cd15c356906dd34,2159
+  - hpath-0.11.0@sha256:12b8405bee13d0007d644a888ef8407069ce7bbbd76970f8746b801447124ade,1440
+  - hpath-filepath-0.10.4@sha256:e9e44fb5fdbade7f30b5b5451257dbee15b6ef1aae4060034d73008bb3b5d878,1269
+  - hpath-posix-0.13.2@sha256:eec4ff2b00dc86be847aca0f409fc8f6212ffd2170ec36a17dc9a52b46562392,1615
+  - http-io-streams-0.1.4.0@sha256:9a74a059daeddf7a41d361919190b9f4d4292f05e0e4bdf156e2098a116a8145,3582
+  - libarchive-3.0.0.0@sha256:e4157b307acf16cca0ec3d398ac5093cc06f092b33a9743be559ef0f6c6ae52f,11204
+  - os-release-1.0.1@sha256:1281c62081f438fc3f0874d3bae6a4887d5964ac25261ba06e29d368ab173467,2716
+  - primitive-extras-0.8@sha256:fca0310150496867f5b9421fe1541ecda87fae17eae44885a29f9c52dd00c8ff,2963
+  - primitive-unlifted-0.1.3.0@sha256:a98f827740f5dcf097d885b3a47c32f4462204449620abc9d51b8c4f8619f9e6,1427
+  - random-1.2.0@sha256:4321209c8faedc034810ea8ed0dbc4a36f1a1df97b75af024219f2f533da57de,6094
+  - splitmix-0.1.0.1@sha256:22f9662e7e8b173421872241edd39350078a9ed4bb9e9f503948c5b483c79276,5253
+  - streamly-posix-0.1.0.1@sha256:5d89b806281035d34020387ed99dde1ddab282c7ed66df3b7cd010b38fd3517b,2138
+  - strict-base-0.4.0.0@sha256:2ff4e43cb95eedf2995558d7fc34d19362846413dd39e6aa6a5b3ea8228fef9f,1248
+  - tar-bytestring-0.6.3.2@sha256:88f29bed56b688c543a4cb3986402d64b360f76b3fd9b88ac618b8344f8da712,5715
+  - versions-4.0.1@sha256:0f644c1587d38f0eb3c3fe364bf1822424db43cbd4d618d0e21473b062c45239,1936
+  - vty-5.30@sha256:4af3938d7b9e6096e222bf52d0ea5d39873bc6fe19febd34106906306af13730,20857
+  - xor-0.0.1.0@sha256:f8362b4a68562b9afbcd727ff64c1a303970df3a032e0033d2f4c094c3501df3,2243
+
+flags:
+  http-io-streams:
+    brotli: false
+
+  libarchive:
+    system-libarchive: false
+
+  ghcup:
+    tui: true
+    internal-downloader: true
+
+system-ghc: true
+compiler: ghc-8.8.4
+compiler-check: match-exact
+
+ghc-options:
+  "$locals": -O2
+  streamly: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16
+  ghcup: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16

test/GHCup/ArbitraryTypes.hs

@@ -0,0 +1,205 @@
+{-# OPTIONS_GHC -Wno-orphans #-}
+
+{-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE TypeApplications #-}
+
+module GHCup.ArbitraryTypes where
+
+
+import           GHCup.Types
+
+import           Data.ByteString                ( ByteString )
+import           Data.Versions
+import           Data.List.NonEmpty
+import           HPath
+import           Test.QuickCheck
+import           Test.QuickCheck.Arbitrary.ADT  ( ToADTArbitrary )
+import           Test.QuickCheck.Arbitrary.Generic
+import           URI.ByteString
+
+import qualified Data.Map.Strict               as M
+import qualified Data.Text                     as T
+import qualified Data.Text.Encoding            as E
+import qualified Data.Text.Lazy                as T
+                                                ( toStrict )
+import qualified Data.Text.Lazy.Builder        as B
+import qualified Data.Text.Lazy.Builder.Int    as B
+
+
+    -----------------
+    --[ utilities ]--
+    -----------------
+
+intToText :: Integral a => a -> T.Text
+intToText = T.toStrict . B.toLazyText . B.decimal
+
+genVer :: Gen (Int, Int, Int)
+genVer =
+  (\x y z -> (getPositive x, getPositive y, getPositive z))
+    <$> arbitrary
+    <*> arbitrary
+    <*> arbitrary
+
+
+instance ToADTArbitrary GHCupInfo
+
+
+
+    ----------------------
+    --[ base arbitrary ]--
+    ----------------------
+
+instance Arbitrary T.Text where
+  arbitrary = fmap T.pack $ listOf $ elements ['a' .. 'z']
+  shrink xs = T.pack <$> shrink (T.unpack xs)
+
+instance Arbitrary (NonEmpty Word) where
+  arbitrary = fmap fromList $ listOf1 $ arbitrary
+
+-- utf8 encoded bytestring
+instance Arbitrary ByteString where
+  arbitrary = fmap (E.encodeUtf8 . T.pack) $ listOf $ elements ['a' .. 'z']
+
+
+
+    ---------------------
+    --[ uri arbitrary ]--
+    ---------------------
+
+instance Arbitrary Scheme where
+  arbitrary = oneof [ Scheme <$> pure "http", Scheme <$> pure "https" ]
+
+instance Arbitrary Host where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary Port where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary (URIRef Absolute) where
+  arbitrary =
+    URI <$> arbitrary <*> pure Nothing <*> arbitrary <*> (Query <$> pure []) <*> pure Nothing
+
+
+
+    -------------------------
+    --[ version arbitrary ]--
+    -------------------------
+
+instance Arbitrary Mess where
+  arbitrary = do
+    (x, y, z) <- genVer
+    pure
+      $ either (error . show) id
+      $ mess
+      $ (intToText x <> "." <> intToText y <> "." <> intToText z)
+
+instance Arbitrary Version where
+  arbitrary = do
+    (x, y, z) <- genVer
+    pure
+      $ either (error . show) id
+      $ version
+      $ (intToText x <> "." <> intToText y <> "." <> intToText z)
+
+instance Arbitrary SemVer where
+  arbitrary = do
+    (x, y, z) <- genVer
+    pure
+      $ either (error . show) id
+      $ semver
+      $ (intToText x <> "." <> intToText y <> "." <> intToText z)
+
+instance Arbitrary PVP where
+  arbitrary = do
+    (x, y, z) <- genVer
+    pure
+      $ either (error . show) id
+      $ pvp
+      $ (intToText x <> "." <> intToText y <> "." <> intToText z)
+
+instance Arbitrary Versioning where
+  arbitrary = Ideal <$> arbitrary
+
+
+
+    -----------------------
+    --[ ghcup arbitrary ]--
+    -----------------------
+
+instance Arbitrary Requirements where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary DownloadInfo where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary LinuxDistro where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary Platform where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary Tag where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary Architecture where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary VersionInfo where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary VersionRange where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary (NonEmpty VersionCmp) where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary VersionCmp where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary (Path Rel) where
+  arbitrary =
+    (either (error . show) id . parseRel . E.encodeUtf8 . T.pack)
+      <$> (listOf1 $ elements ['a' .. 'z'])
+
+instance Arbitrary TarDir where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary Tool where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+instance Arbitrary GHCupInfo where
+  arbitrary = genericArbitrary
+  shrink    = genericShrink
+
+
+-- our maps are nested... the default size easily blows up most ppls ram
+
+instance {-# OVERLAPS #-} Arbitrary v => Arbitrary (M.Map Tool v) where
+  arbitrary = resize 8 $ M.fromList <$> arbitrary
+
+instance {-# OVERLAPS #-} Arbitrary v => Arbitrary (M.Map (Maybe Version) v) where
+  arbitrary = resize 8 $ M.fromList <$> arbitrary
+
+instance {-# OVERLAPS #-} Arbitrary v => Arbitrary (M.Map Platform v) where
+  arbitrary = resize 8 $ M.fromList <$> arbitrary
+
+instance {-# OVERLAPS #-} Arbitrary v => Arbitrary (M.Map (Maybe Versioning) v) where
+  arbitrary = resize 8 $ M.fromList <$> arbitrary
+

test/GHCup/Types/JSONSpec.hs

@@ -0,0 +1,17 @@
+{-# LANGUAGE DeriveGeneric #-}
+{-# LANGUAGE TypeApplications #-}
+
+module GHCup.Types.JSONSpec where
+
+import           GHCup.ArbitraryTypes ()
+import           GHCup.Types
+import           GHCup.Types.JSON ()
+
+import           Test.Aeson.GenericSpecs
+import           Test.Hspec
+
+
+
+spec :: Spec
+spec = do
+  roundtripAndGoldenSpecs (Proxy @GHCupInfo)

test/Main.hs

@@ -0,0 +1,12 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+import Test.Hspec.Runner
+import Test.Hspec.Formatters
+import qualified Spec
+
+
+main :: IO ()
+main =
+  hspecWith
+    defaultConfig { configFormatter = Just progress }
+    $ Spec.spec

test/MyLibTest.hs

@@ -1,4 +0,0 @@
-module Main (main) where
-
-main :: IO ()
-main = putStrLn "Test suite not yet implemented."

test/Spec.hs

@@ -0,0 +1,2 @@
+-- file test/Spec.hs
+{-# OPTIONS_GHC -F -pgmF hspec-discover -optF --module-name=Spec #-}