Update travis

2020-06-14 12:36:13 +02:00
47 changed files with 5400 additions and 3541 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,15 +1,4 @@
-.ghci
-.vim
-codex.tags
 dist-newstyle/
 cabal.project.local
 .stack-work/
 bin/
-/*.prof
-/*.ps
-/*.hp
-tags
-TAGS
-/tmp/
-.entangled
-release/
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ variables:
  GIT_SSL_NO_VERIFY: "1"

  # Commit of ghc/ci-images repository from which to pull Docker images
-  DOCKER_REV: 1ac7f435c9312f10422a82d304194778378e2a1a
+  DOCKER_REV: cefaee3c742af193e0f7783f87edb0d35374515c

 ############################################################
 # CI Step
@@ -14,7 +14,6 @@ variables:
    - x86_64-linux
  variables:
    OS: "LINUX"
-    BIT: "64"

 .alpine:64bit:
  image: "alpine:edge"
@@ -37,14 +36,12 @@ variables:
    - x86_64-darwin
  variables:
    OS: "DARWIN"
-    BIT: "64"

 .freebsd:
  tags:
    - x86_64-freebsd
  variables:
    OS: "FREEBSD"
-    BIT: "64"

 .root_cleanup:
  after_script:
@@ -69,13 +66,6 @@ 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
@@ -107,36 +97,29 @@ variables:
 test:linux:recommended:
  extends: .test_ghcup_version:linux
  variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.8.3"
    CABAL_VERSION: "3.2.0.0"

 test:linux:latest:
  extends: .test_ghcup_version:linux
  variables:
-    GHC_VERSION: "8.10.2"
+    GHC_VERSION: "8.10.1"
    CABAL_VERSION: "3.2.0.0"
  allow_failure: true

-######## linux 32bit test ########
-
-test:linux:recommended:32bit:
-  extends: .test_ghcup_version:linux32
-  variables:
-    GHC_VERSION: "8.8.4"
-    CABAL_VERSION: "3.2.0.0"

 ######## darwin test ########

 test:mac:recommended:
  extends: .test_ghcup_version:darwin
  variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.8.3"
    CABAL_VERSION: "3.2.0.0"

 test:mac:latest:
  extends: .test_ghcup_version:darwin
  variables:
-    GHC_VERSION: "8.10.2"
+    GHC_VERSION: "8.10.1"
    CABAL_VERSION: "3.2.0.0"
  allow_failure: true

@@ -146,13 +129,13 @@ test:mac:latest:
 test:freebsd:recommended:
  extends: .test_ghcup_version:freebsd
  variables:
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.8.3"
    CABAL_VERSION: "3.2.0.0"

 test:freebsd:latest:
  extends: .test_ghcup_version:freebsd
  variables:
-    GHC_VERSION: "8.10.2"
+    GHC_VERSION: "8.10.1"
    CABAL_VERSION: "3.2.0.0"
  allow_failure: true

@@ -167,7 +150,7 @@ release:linux:64bit:
    - ./.gitlab/before_script/linux/alpine/install_deps.sh
  variables:
    ARTIFACT: "x86_64-linux-ghcup"
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.8.3"
    CABAL_VERSION: "3.2.0.0"


@@ -179,7 +162,7 @@ release:linux:32bit:
    - ./.gitlab/before_script/linux/alpine/install_deps.sh
  variables:
    ARTIFACT: "i386-linux-ghcup"
-    GHC_VERSION: "8.8.4"
+    GHC_VERSION: "8.8.3"
    CABAL_VERSION: "3.2.0.0"


@@ -211,5 +194,4 @@ release:freebsd:
  variables:
    ARTIFACT: "x86_64-portbld-freebsd-ghcup"
    GHC_VERSION: "8.8.3"
-    CABAL_VERSION: "3.2.0.0"

--- a/.gitlab/before_script/freebsd/install_deps.sh
+++ b/.gitlab/before_script/freebsd/install_deps.sh
@@ -12,7 +12,7 @@ curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-portbld-freebsd-ghcup > .
 chmod +x ghcup-bin

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

 exit 0
--- a/.gitlab/before_script/linux/alpine/install_deps.sh
+++ b/.gitlab/before_script/linux/alpine/install_deps.sh
@@ -18,14 +18,29 @@ apk add --no-cache \
 	tar \
 	perl

+ln -s libncurses.so /usr/lib/libtinfo.so
+ln -s libncursesw.so.6 /usr/lib/libtinfow.so.6
 if [ "${BIT}" = "32" ] ; then
-	curl -sSfL https://downloads.haskell.org/ghcup/i386-linux-ghcup > ./ghcup-bin
+	curl -sSfL https://downloads.haskell.org/~ghcup/0.1.4/i386-linux-ghcup-0.1.4 > ./ghcup-bin
 else
-	curl -sSfL https://downloads.haskell.org/ghcup/x86_64-linux-ghcup > ./ghcup-bin
+	curl -sSfL https://downloads.haskell.org/~ghcup/0.1.4/x86_64-linux-ghcup-0.1.4 > ./ghcup-bin
 fi
 chmod +x ghcup-bin
+./ghcup-bin upgrade
 ./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin install-cabal ${CABAL_VERSION}
+# ./ghcup-bin install-cabal ${CABAL_VERSION}
+# install cabal-3.2.0.0
+if [ "${BIT}" = "32" ] ; then
+	curl -sSfL -o cabal-install-3.2.0.0-i386-alpine-linux-musl.tar.xz 'https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-i386-alpine-linux-musl.tar.xz&dl=1'
+	tar xf cabal-install-3.2.0.0-i386-alpine-linux-musl.tar.xz
+	cp cabal-install-3.2.0.0-i386-alpine-linux-musl "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
+else
+	curl -sSfL -o cabal-install-3.2.0.0-x86_64-alpine-linux-musl.tar.xz 'https://hasufell.de/d/d3e215db133e4fcaa61e/files/?p=/cabal-install-3.2.0.0-x86_64-alpine-linux-musl.tar.xz&dl=1'
+	tar xf cabal-install-3.2.0.0-x86_64-alpine-linux-musl.tar.xz
+	cp cabal-install-3.2.0.0-x86_64-alpine-linux-musl "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
+fi
+chmod +x "${GHCUP_INSTALL_BASE_PREFIX}/.ghcup/bin/cabal"
+

 # utils
 apk add --no-cache \
@@ -42,6 +57,7 @@ apk add --no-cache \
 	openssl-dev \
 	openssl-libs-static \
 	xz \
-	xz-dev \
-	ncurses-static
+	xz-dev
+
+

--- a/.gitlab/script/ghcup_release.sh
+++ b/.gitlab/script/ghcup_release.sh
@@ -16,24 +16,16 @@ git describe
 ecabal update

 if [ "${OS}" = "LINUX" ] ; then
-	if [ "${BIT}" = "32" ] ; then
-		ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections -optl-static' -ftui -ftar
-	else
-		ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections -optl-static' -ftui
-	fi
+	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections -optl-static'
 elif [ "${OS}" = "FREEBSD" ] ; then
-	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections' --constraint="zlib static" -ftui
+	ecabal build -w ghc-${GHC_VERSION} --ghc-options='-split-sections' --constraint="zlib static"
 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"
 fi

 mkdir out
 cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --verbose=0 --offline sh -- -c 'command -v ghcup')" .
 ver=$(./ghcup --numeric-version)
-if [ "${OS}" = "DARWIN" ] ; then
-	strip ./ghcup
-else
-	strip -s ./ghcup
-fi
+strip -s ./ghcup
 cp ghcup out/${ARTIFACT}-${ver}

--- a/.gitlab/script/ghcup_version.sh
+++ b/.gitlab/script/ghcup_version.sh
@@ -11,7 +11,7 @@ ecabal() {
 }

 eghcup() {
-	ghcup -v -c -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml "$@"
+	ghcup -v -c -s file://$(pwd)/ghcup-${JSON_VERSION}.json "$@"
 }

 git describe --always
@@ -21,21 +21,13 @@ git describe --always
 ecabal update

 if [ "${OS}" = "DARWIN" ] ; then
-	ecabal build -w ghc-${GHC_VERSION} -ftui
-elif [ "${OS}" = "LINUX" ] ; then
-	if [ "${BIT}" = "32" ] ; then
-		ecabal build -w ghc-${GHC_VERSION} -finternal-downloader -ftui -ftar
-	else
-		ecabal build -w ghc-${GHC_VERSION} -finternal-downloader -ftui
-	fi
+	ecabal build -w ghc-${GHC_VERSION}
 else
-	ecabal build -w ghc-${GHC_VERSION} -finternal-downloader -ftui
+	ecabal build -w ghc-${GHC_VERSION} -finternal-downloader
 fi

-ecabal haddock -w ghc-${GHC_VERSION} -ftar
-
-cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --enable-tests --verbose=0 --offline sh -- -c 'command -v ghcup')" .
-cp "$(ecabal new-exec -w ghc-${GHC_VERSION} --enable-tests --verbose=0 --offline sh -- -c 'command -v ghcup-gen')" .
+cp "$(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 ./ghcup "$CI_PROJECT_DIR"/.local/bin/ghcup
 cp ./ghcup-gen "$CI_PROJECT_DIR"/.local/bin/ghcup-gen
@@ -48,10 +40,16 @@ rm -rf "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup
 ### manual cli based testing


-ghcup-gen check -f ghcup-${JSON_VERSION}.yaml
+ghcup-gen check -f ghcup-${JSON_VERSION}.json

 eghcup --numeric-version

+# TODO: rm once we have tarballs
+if [ "${OS}"  = "FREEBSD" ] ; then
+	GHC_VERSION=8.6.3
+	CABAL_VERSION=2.4.1.0
+fi
+
 eghcup install ${GHC_VERSION}
 eghcup set ${GHC_VERSION}
 eghcup install-cabal ${CABAL_VERSION}
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,5 @@
 jobs:
  include:
-    - os: osx
-      osx_image: xcode8
-      language: generic
-      env: ARTIFACT=x86_64-apple-darwin-10.11-ghcup
-
    - os: osx
      osx_image: xcode10.1
      language: generic
@@ -15,13 +10,6 @@ jobs:
      language: generic
      env: ARTIFACT=x86_64-apple-darwin-10.14-ghcup

-  allow_failures:
-    - os: osx
-      osx_image: xcode8
-      language: generic
-      env: ARTIFACT=x86_64-apple-darwin-10.11-ghcup
-
-
 script: ".travis/build.sh"

 deploy:
--- a/.travis/build.sh
+++ b/.travis/build.sh
@@ -18,7 +18,7 @@ ghcup set 8.8.3
 ## install ghcup

 cabal update
-cabal build --constraint="zlib static" --constraint="lzma static" -ftui
+cabal build --constraint="zlib static" --constraint="lzma static"
 cp "$(cabal new-exec --verbose=0 --offline sh -- -c 'command -v ghcup')" .
-strip ./ghcup
+strip -s ghcup
 cp ghcup "./${ARTIFACT}"
--- a/3rdparty/lzma/lzma.cabal
+++ b/3rdparty/lzma/lzma.cabal
@@ -86,7 +86,7 @@ test-suite lzma-tests
  -- additional dependencies that require version bounds
  build-depends:       HUnit                      >= 1.2      && <1.7
                     , QuickCheck                 >= 2.8      && <2.14
-                     , tasty                      >= 0.10     && <1.4
+                     , tasty                      >= 0.10     && <1.3
                     , tasty-hunit                >= 0.9      && <0.11
                     , tasty-quickcheck           >= 0.8.3.2  && <0.11

--- a/3rdparty/zlib/zlib.cabal
+++ b/3rdparty/zlib/zlib.cabal
@@ -110,7 +110,7 @@ test-suite tests
  default-language: Haskell2010
  build-depends:   base, bytestring, zlib,
                   QuickCheck       == 2.*,
-                   tasty            >= 0.8 && < 1.4,
+                   tasty            >= 0.8 && < 1.3,
                   tasty-quickcheck >= 0.8 && < 0.11,
                   tasty-hunit      >= 0.8 && < 0.11
  ghc-options:     -Wall
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,47 +1,5 @@
 # Revision history for ghcup

-## 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
-* Allow to install from arbitrary bindists: `ghcup -n install ghc -u '{"dlHash": "", "dlSubdir": "ghc-8.10.1", "dlUri": "https://github.com/commercialhaskell/ghc/releases/download/ghc-8.10.1-release/ghc-8.10.1-x86_64-deb9-linux.tar.xz"}' 8.10.1`
-
-## 0.1.7 -- 2020-07-20
-
-* Fix a bug in libarchive not unpacking some uncleanly packed bindists
-* Improved fish support in bootstrap-haskell
-* Only check for upgrades when not upgrading
-* Fix platform detection for i386 docker images
-* Improve alpine support
-  - more/proper bindists
-  - don't fall back to glibc based bindists
-  - install bindists with `--disable-ld-override` to avoid ld.gold bugs
-
-## 0.1.6 -- 2020-07-13
-
-* Create a new curses (brick) based TUI, accessible via `ghcup tui` #24
-* Support multiple installed versions of cabal #23
-* Improvements to `ghcup list` (show unavailable bindists for platform)
-* Fix redhat downloads #29
-* Support for hadrian bindists (fixes alpine-8.10.1) #31
-* Add FreeBSD bindists 8.6.5 and 8.8.3
-* Fix memory leak during unpack
-
 ## 0.1.5 -- 2020-04-30

 * Fix errors when PATH variable contains path components that are actually files
--- a/README.md
+++ b/README.md
@@ -13,7 +13,6 @@ Similar in scope to [rustup](https://github.com/rust-lang-nursery/rustup.rs), [p
     * [Manpages](#manpages)
     * [Shell-completion](#shell-completion)
     * [Cross support](#cross-support)
-     * [XDG support](#xdg-support)
   * [Design goals](#design-goals)
   * [How](#how)
   * [Known users](#known-users)
@@ -41,13 +40,7 @@ export PATH="$HOME/.cabal/bin:$HOME/.ghcup/bin:$PATH"

 See `ghcup --help`.

-For the simple interactive TUI, run:
-
-```sh
-ghcup tui
-```
-
-For the full functionality via cli:
+Common use cases are:

 ```sh
 # list available ghc/cabal versions
@@ -97,16 +90,6 @@ 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
-* `XDG_CACHE_HOME`: logs and download files will be stored in `ghcup` subdir
-* `XDG_BIN_HOME`: binaries end up here (default: `~/.local/bin`)
-
 ## Design goals

 1. simplicity
--- a/RELEASING.md
+++ b/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 YAML representation of it. The version of the YAML 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 JSON representation of it. The version of the json represents the change increments. `ghcUpVer` is the current application version.

 2. Update version in ghcup.cabal

 3. Add ChangeLog entry

-4. Add/fix downloads in `ghcup-<ver>.yaml`, then verify with `ghcup-gen check -f ghcup-<ver>.yaml`
+4. Add/fix downloads to `GHCupDownloads` module, then run `ghcup-gen gen` to generate the new json and validate it via `ghcup-gen check`.

 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 yaml file (see point 4.)
+7. Add release artifacts to GHCupDownloads (see point 4.)

-8. Upload the final `ghcup-<ver>.yaml` to `webhost.haskell.org/ghcup/data/`.
+8. Upload the final `ghcup-<ver>.json` to `webhost.haskell.org/ghcup/data/`.

 9. Update bootstrap-haskell and symlinks on `downloads.haskell.org/ghcup`
--- a/app/ghcup-gen/Main.hs
+++ b/app/ghcup-gen/Main.hs
@@ -10,10 +10,13 @@

 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
 #if !MIN_VERSION_base(4,13,0)
 import           Data.Semigroup                 ( (<>) )
 #endif
@@ -24,15 +27,48 @@ import           System.IO                      ( stdout )
 import           Validate

 import qualified Data.ByteString               as B
-import qualified Data.Yaml                     as Y
+import qualified Data.ByteString.Lazy          as L


 data Options = Options
  { optCommand :: Command
  }

-data Command = ValidateYAML ValidateYAMLOpts
-             | ValidateTarballs ValidateYAMLOpts
+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 Input
@@ -56,12 +92,12 @@ stdInput = flag'
 inputP :: Parser Input
 inputP = fileInput <|> stdInput

-data ValidateYAMLOpts = ValidateYAMLOpts
-  { vInput :: Maybe Input
+data ValidateJSONOpts = ValidateJSONOpts
+  { input :: Maybe Input
  }

-validateYAMLOpts :: Parser ValidateYAMLOpts
-validateYAMLOpts = ValidateYAMLOpts <$> optional inputP
+validateJSONOpts :: Parser ValidateJSONOpts
+validateJSONOpts = ValidateJSONOpts <$> optional inputP

 opts :: Parser Options
 opts = Options <$> com
@@ -69,10 +105,18 @@ opts = Options <$> com
 com :: Parser Command
 com = subparser
  (  (command
+       "gen"
+       (   GenJSON
+       <$> (info (genJSONOpts <**> helper)
+                 (progDesc "Generate the json downloads file")
+           )
+       )
+     )
+  <> (command
       "check"
-       (   ValidateYAML
-       <$> (info (validateYAMLOpts <**> helper)
-                 (progDesc "Validate the YAML")
+       (   ValidateJSON
+       <$> (info (validateJSONOpts <**> helper)
+                 (progDesc "Validate the JSON")
           )
       )
     )
@@ -80,7 +124,7 @@ com = subparser
       "check-tarballs"
       (   ValidateTarballs
       <$> (info
-             (validateYAMLOpts <**> helper)
+             (validateJSONOpts <**> helper)
             (progDesc "Validate all tarballs (download and checksum)")
           )
       )
@@ -91,27 +135,38 @@ com = subparser

 main :: IO ()
 main = do
-  _ <- customExecParser (prefs showHelpOnError) (info (opts <**> helper) idm)
+  customExecParser (prefs showHelpOnError) (info (opts <**> helper) idm)
    >>= \Options {..} -> case optCommand of
-          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
+          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
-            ValidateYAMLOpts { vInput = Nothing } ->
-              B.getContents >>= valAndExit validateTarballs
-            ValidateYAMLOpts { vInput = Just StdInput } ->
-              B.getContents >>= valAndExit validateTarballs
-            ValidateYAMLOpts { vInput = Just (FileInput file) } ->
-              B.readFile file >>= valAndExit validateTarballs
+            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
  pure ()

 where
  valAndExit f contents = do
-    (GHCupInfo _ av) <- case Y.decodeEither' contents of
+    (GHCupInfo _ av) <- case eitherDecode contents of
      Right r -> pure r
      Left  e -> die (color Red $ show e)
    myLoggerT (LoggerConfig True (B.hPut stdout) (\_ -> pure ())) (f av)
--- a/app/ghcup-gen/Validate.hs
+++ b/app/ghcup-gen/Validate.hs
@@ -7,10 +7,7 @@ module Validate where
 import           GHCup
 import           GHCup.Download
 import           GHCup.Types
-import           GHCup.Utils.Dirs
-import           GHCup.Utils.File
 import           GHCup.Utils.Logger
-import           GHCup.Utils.Version.QQ

 import           Control.Exception.Safe
 import           Control.Monad
@@ -91,15 +88,6 @@ 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 =
@@ -123,7 +111,6 @@ validate dls = do
   where
    isUniqueTag Latest         = True
    isUniqueTag Recommended    = True
-    isUniqueTag Prerelease     = False
    isUniqueTag (Base       _) = False
    isUniqueTag (UnknownTag _) = False

@@ -192,8 +179,7 @@ validateTarballs dls = do

 where
  downloadAll dli = do
-    dirs <- liftIO getDirs
-    let settings = Settings True False Never Curl False dirs defExecCb
+    let settings = Settings True False Never Curl
    let runLogger = myLoggerT LoggerConfig { lcPrintDebug = True
                                           , colorOutter  = B.hPut stderr
                                           , rawOutter    = (\_ -> pure ())
--- a/app/ghcup/BrickMain.hs
+++ b/app/ghcup/BrickMain.hs
@@ -1,433 +0,0 @@
-{-# LANGUAGE CPP               #-}
-{-# LANGUAGE DataKinds         #-}
-{-# LANGUAGE QuasiQuotes       #-}
-{-# LANGUAGE TypeApplications  #-}
-{-# LANGUAGE TemplateHaskell   #-}
-{-# LANGUAGE OverloadedStrings #-}
-
-module BrickMain where
-
-import           GHCup
-import           GHCup.Download
-import           GHCup.Errors
-import           GHCup.Types
-import           GHCup.Utils
-import           GHCup.Utils.File
-import           GHCup.Utils.Logger
-import           GHCup.Utils.Prelude
-
-import           Brick
-import           Brick.BChan
-import           Brick.Widgets.Border
-import           Brick.Widgets.Border.Style
-import           Brick.Widgets.Center
-import           Brick.Widgets.List
-#if !defined(TAR)
-import           Codec.Archive
-#endif
-import           Control.Concurrent
-import           Control.Concurrent.MVar
-import           Control.Exception.Safe
-import           Control.Monad.Logger
-import           Control.Monad.Reader
-import           Control.Monad.Trans.Resource
-import           Data.Bool
-import           Data.ByteString                ( ByteString )
-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.Versions           hiding ( str )
-import           Haskus.Utils.Variant.Excepts
-import           HPath
-import           HPath.IO                hiding ( hideError )
-import           Prelude                 hiding ( abs, appendFile, writeFile )
-import           System.Exit
-import           System.IO.Unsafe
-import           System.Posix.Types
-import           URI.ByteString
-
-import qualified Data.Text                     as T
-import qualified Graphics.Vty                  as Vty
-import qualified Data.Vector                   as V
-import qualified "unix-bytestring" System.Posix.IO.ByteString
-                                               as SPIB
-
-data SubProcess = SubProcess {
-    procName :: String
-  , exited   :: Maybe (Either ProcessError ())
-  , procId   :: Maybe ProcessID
-  , logLine  :: Maybe ByteString
-}
-
-data AppState = AppState {
-    lr    :: LR
-  , dls   :: GHCupDownloads
-  , pfreq :: PlatformRequest
-
-  , mproc :: Maybe SubProcess
-}
-
-data MyAppEvent = LogLine ByteString
-                | StartProc String
-                | GotProcId ProcessID
-                | EndProc (Either ProcessError ())
-
-type LR = GenericList String Vector ListResult
-
-
-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')
-  ]
-
-
-ui :: AppState -> Widget String
-ui AppState {..} =
-  case mproc of
-    Just _ -> logDialog
-    Nothing ->
-              ( padBottom Max
-                $ ( withBorderStyle unicode
-                  $ borderWithLabel (str "GHCup")
-                  $ (center $ renderList renderItem True lr)
-                  )
-                )
-                <=> ( withAttr "help"
-                    . txtWrap
-                    . T.pack
-                    . foldr1 (\x y -> x <> "  " <> y)
-                    . (++ ["↑↓:Navigation"])
-                    $ (fmap (\(c, s, _) -> (c : ':' : s)) keyHandlers)
-                    )
-
- where
-  logDialog = case mproc of
-    Nothing -> emptyWidget
-    Just (SubProcess name Nothing _ (Just logLine)) -> centerLayer . txtWrap . decUTF8Safe $ logLine
-    Just (SubProcess name Nothing _ (Just logLine)) -> centerLayer . txtWrap $ ""
-  renderItem b ListResult {..} =
-    let marks = if
-          | lSet       -> (withAttr "set" $ str "✔✔")
-          | lInstalled -> (withAttr "installed" $ str "✓ ")
-          | otherwise  -> (withAttr "not-installed" $ str "✗ ")
-        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
-          (   marks
-          <+> ( padLeft (Pad 2)
-              $ minHSize 20
-              $ ((if b then withAttr "active" else id)
-                  (str $ (fmap toLower . show $ lTool) <> " " <> ver)
-                )
-              )
-          <+> (padLeft (Pad 1) $ if null lTag
-                then emptyWidget
-                else
-                  foldr1 (\x y -> x <+> str "," <+> y)
-                    $ (fmap printTag $ sort lTag)
-              )
-          )
-
-  printTag Recommended        = withAttr "recommended" $ str "recommended"
-  printTag Latest             = withAttr "latest" $ str "latest"
-  printTag Prerelease         = withAttr "prerelease" $ str "prerelease"
-  printTag (Base       pvp'') = str ("base-" ++ T.unpack (prettyPVP pvp''))
-  printTag (UnknownTag t    ) = str t
-
-
-minHSize :: Int -> Widget n -> Widget n
-minHSize s' = hLimit s' . vLimit 1 . (<+> fill ' ')
-
-
-app :: App AppState MyAppEvent String
-app = App { appDraw         = \st -> [ui st]
-          , appHandleEvent  = eventHandler
-          , appStartEvent   = return
-          , appAttrMap      = const defaultAttributes
-          , appChooseCursor = neverShowCursor
-          }
-
-defaultAttributes :: AttrMap
-defaultAttributes = 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)
-  , ("prerelease"   , Vty.defAttr `Vty.withForeColor` Vty.red)
-  , ("help"         , Vty.defAttr `Vty.withStyle` Vty.italic)
-  ]
-
-
-dimAttributes :: AttrMap
-dimAttributes = attrMap
-  (Vty.defAttr `Vty.withStyle` Vty.dim)
-  [ ("active"    , Vty.defAttr `Vty.withBackColor` Vty.blue)
-  , ("no-bindist", Vty.defAttr `Vty.withStyle` Vty.dim)
-  ]
-
-
-
-eventHandler :: AppState -> BrickEvent n MyAppEvent -> 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 mproc)
-eventHandler AppState {..} (VtyEvent (Vty.EvKey (Vty.KDown) _)) =
-  continue (AppState (listMoveDown lr) dls pfreq mproc)
-eventHandler as (VtyEvent (Vty.EvKey (Vty.KChar c) _)) =
-  case find (\(c', _, _) -> c' == c) keyHandlers of
-    Nothing              -> continue as
-    Just (_, _, handler) -> handler as
-eventHandler st (AppEvent (StartProc str')) = continue st
-  { mproc = Just SubProcess { procName = str'
-                            , exited   = Nothing
-                            , procId   = Nothing
-                            , logLine  = Nothing
-                            }
-  }
-eventHandler st@AppState { mproc = Just sp } (AppEvent (GotProcId pid)) =
-  continue st { mproc = Just sp { procId = Just pid } }
-eventHandler st@AppState { mproc = Just sp } (AppEvent (EndProc exited)) =
-  continue st { mproc = Just sp { exited = Just exited, procId = Nothing } }
-eventHandler st@AppState { mproc = Just sp } (AppEvent (LogLine bs)) =
-  continue st { mproc = Just sp { logLine = Just bs } }
-eventHandler st (AppEvent _) = error "noes" -- TODO
-eventHandler st _             = continue st
-
-
-- | 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
-  Nothing      -> continue as
-  Just (ix, e) -> do
-    liftIO $ forkIO $ void $ action as (ix, e)
-    continue as
-    -- 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
-
-
-install' :: AppState -> (Int, ListResult) -> IO (Either String ())
-install' AppState {..} (_, ListResult {..}) = do
-  settings <- readIORef settings'
-  l        <- readIORef logger'
-  let runLogger = myLoggerT l
-
-  let
-    run =
-      runLogger
-        . flip runReaderT settings
-        . runResourceT
-        . runE
-          @'[AlreadyInstalled
-            , UnknownArchive
-#if !defined(TAR)
-            , ArchiveResult
-#endif
-            , 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 $> ()
-    )
-    >>= \case
-          VRight _                          -> pure $ Right ()
-          VLeft  (V (AlreadyInstalled _ _)) -> pure $ Right ()
-          VLeft (V (BuildFailed _ e)) ->
-            pure $ Left [i|Build failed with #{e}|]
-          VLeft (V NoDownload) ->
-            pure $ Left [i|No available version for #{prettyVer lVer}|]
-          VLeft (V NoUpdate) -> pure $ Right ()
-          VLeft e -> pure $ Left [i|#{e}
-Also check the logs in ~/.ghcup/logs|]
-
-
-set' :: AppState -> (Int, ListResult) -> IO (Either String ())
-set' _ (_, ListResult {..}) = do
-  settings <- readIORef settings'
-  l        <- readIORef logger'
-  let runLogger = myLoggerT l
-
-  let run =
-        runLogger
-          . flip runReaderT settings
-          . runE @'[FileDoesNotExistError, NotInstalled, TagNotFound]
-
-  (run $ do
-      case lTool of
-        GHC   -> liftE $ setGHC (GHCTargetVersion lCross lVer) SetGHCOnly $> ()
-        Cabal -> liftE $ setCabal lVer $> ()
-        GHCup -> pure ()
-    )
-    >>= \case
-          VRight _ -> pure $ Right ()
-          VLeft  e -> pure $ Left [i|#{e}|]
-
-
-del' :: AppState -> (Int, ListResult) -> IO (Either String ())
-del' _ (_, ListResult {..}) = do
-  settings <- readIORef settings'
-  l        <- readIORef logger'
-  let runLogger = myLoggerT l
-
-  let run = runLogger . flip runReaderT settings . runE @'[NotInstalled]
-
-  (run $ do
-      case lTool of
-        GHC   -> liftE $ rmGHCVer (GHCTargetVersion lCross lVer) $> ()
-        Cabal -> liftE $ rmCabalVer lVer $> ()
-        GHCup -> pure ()
-    )
-    >>= \case
-          VRight _ -> pure $ Right ()
-          VLeft  e -> pure $ Left [i|#{e}|]
-
-
-changelog' :: AppState -> (Int, ListResult) -> IO (Either String ())
-changelog' AppState {..} (_, 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"
-      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
-{-# NOINLINE settings' #-}
-settings' = unsafePerformIO $ do
-  dirs <- getDirs
-  newIORef Settings { cache      = True
-                    , noVerify   = False
-                    , keepDirs   = Never
-                    , downloader = Curl
-                    , verbose    = False
-                    , execCb     = (\_ _ _ _ _ -> liftIO $ writeFile [abs|/home/jule/git/ghcup-hs/cb.log|] Nothing "settings'")
-                    , ..
-                    }
-
-
-logger' :: IORef LoggerConfig
-{-# NOINLINE logger' #-}
-logger' = unsafePerformIO
-  (newIORef $ LoggerConfig { lcPrintDebug = False
-                           , colorOutter  = \_ -> pure ()
-                           , rawOutter    = \_ -> pure ()
-                           }
-  )
-
-
-brickMain :: Settings -> Maybe URI -> LoggerConfig -> GHCupDownloads -> PlatformRequest -> IO ()
-brickMain _ muri _ av pfreq' = do
-  writeIORef uri'      muri
-  s <- readIORef settings'
-  -- logger interpreter
-  -- writeIORef logger'   l
-  l <- readIORef logger'
-  let runLogger = myLoggerT l
-
-  eApps <- getAppState (Just av) pfreq'
-  case eApps of
-    Right as -> do
-      eventChan <- newBChan 1000
-      let builder = Vty.mkVty Vty.defaultConfig
-      initialVty <- builder
-      writeIORef settings' s{ execCb = brickExecCb eventChan }
-      customMain initialVty builder (Just eventChan) app (selectLatest as) $> ()
-    Left  e  -> do
-      runLogger ($(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'
-  settings <- readIORef settings'
-  l        <- readIORef logger'
-  let runLogger = myLoggerT l
-
-  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' Nothing)
-
-  case r of
-    VRight a -> pure $ Right a
-    VLeft  e -> pure $ Left [i|#{e}|]
-
-
-brickExecCb :: BChan MyAppEvent -> ExecCb
-brickExecCb chan _ fileFd stdoutRead pState lfile = do
-  liftIO $ writeFile [abs|/home/jule/git/ghcup-hs/cb.log|] Nothing "brickExecCb"
-  writeBChan chan (StartProc . T.unpack . decUTF8Safe $ lfile)
-  readLineTilEOF lineAction stdoutRead
-  takeMVar pState >>= \case
-    PExited e@(Left _) -> writeBChan chan (EndProc e)
-    _ -> error "no"
- where
-   lineAction bs = do
-     void $ SPIB.fdWrite fileFd (bs <> "\n")
-     error "blah"
-     writeBChan chan (LogLine bs)
-
-
--- a/app/ghcup/Main.hs
+++ b/app/ghcup/Main.hs
@@ -1,7 +1,6 @@
 {-# LANGUAGE CPP               #-}
 {-# LANGUAGE DataKinds         #-}
 {-# LANGUAGE TypeApplications  #-}
-{-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TemplateHaskell   #-}
 {-# LANGUAGE QuasiQuotes       #-}
@@ -11,10 +10,6 @@

 module Main where

-#if defined(BRICK)
-import           BrickMain                    ( brickMain )
-#endif
-
 import           GHCup
 import           GHCup.Download
 import           GHCup.Errors
@@ -26,12 +21,8 @@ import           GHCup.Utils.File
 import           GHCup.Utils.Logger
 import           GHCup.Utils.MegaParsec
 import           GHCup.Utils.Prelude
-import           GHCup.Utils.String.QQ
 import           GHCup.Version

-#if !defined(TAR)
-import           Codec.Archive
-#endif
 import           Control.Exception.Safe
 #if !MIN_VERSION_base(4,13,0)
 import           Control.Monad.Fail             ( MonadFail )
@@ -39,7 +30,6 @@ import           Control.Monad.Fail             ( MonadFail )
 import           Control.Monad.Logger
 import           Control.Monad.Reader
 import           Control.Monad.Trans.Resource
-import           Data.Aeson                     ( eitherDecode )
 import           Data.Bifunctor
 import           Data.Char
 import           Data.Either
@@ -70,7 +60,6 @@ import           URI.ByteString

 import qualified Data.ByteString               as B
 import qualified Data.ByteString.UTF8          as UTF8
-import qualified Data.ByteString.Lazy.UTF8     as BLU
 import qualified Data.Text                     as T
 import qualified Data.Text.IO                  as T
 import qualified Data.Text.Encoding            as E
@@ -104,9 +93,6 @@ data Command
  | Upgrade UpgradeOpts Bool
  | ToolRequirements
  | ChangeLog ChangeLogOptions
-#if defined(BRICK)
-  | Interactive
-#endif

 data ToolVersion = ToolVersion GHCTargetVersion -- target is ignored for cabal
                 | ToolTag Tag
@@ -122,7 +108,6 @@ data InstallCommand = InstallGHC InstallOptions
 data InstallOptions = InstallOptions
  { instVer      :: Maybe ToolVersion
  , instPlatform :: Maybe PlatformRequest
-  , instBindist  :: Maybe DownloadInfo
  }

 data SetCommand = SetGHC SetOptions
@@ -236,20 +221,7 @@ opts =
 com :: Parser Command
 com =
  subparser
-#if defined(BRICK)
      (  command
-          "tui"
-          (   (\_ -> Interactive)
-          <$> (info
-                helper
-                (  progDesc "Start the interactive GHCup UI"
-                )
-              )
-          )
-      <>  command
-#else
-      (  command
-#endif
          "install"
          (   Install
          <$> (info
@@ -340,32 +312,32 @@ com =
          )
 where
  installToolFooter :: String
-  installToolFooter = [s|Discussion:
+  installToolFooter = [i|Discussion:
  Installs GHC or cabal. When no command is given, installs GHC
  with the specified version/tag.
  It is recommended to always specify a subcommand ('ghc' or 'cabal').|]

  setFooter :: String
-  setFooter = [s|Discussion:
+  setFooter = [i|Discussion:
  Sets the currently active GHC or cabal version. When no command is given,
  defaults to setting GHC with the specified version/tag (if no tag
  is given, sets GHC to 'recommended' version).
  It is recommended to always specify a subcommand ('ghc' or 'cabal').|]

  rmFooter :: String
-  rmFooter = [s|Discussion:
+  rmFooter = [i|Discussion:
  Remove the given GHC or cabal version. When no command is given,
  defaults to removing GHC with the specified version.
  It is recommended to always specify a subcommand ('ghc' or 'cabal').|]

  changeLogFooter :: String
-  changeLogFooter = [s|Discussion:
+  changeLogFooter = [i|Discussion:
  By default returns the URI of the ChangeLog of the latest GHC release.
  Pass '-o' to automatically open via xdg-open.|]


 installCabalFooter :: String
-installCabalFooter = [s|Discussion:
+installCabalFooter = [i|Discussion:
  Installs the specified cabal-install version (or a recommended default one)
  into "~/.ghcup/bin", so it can be overwritten by later
  "cabal install cabal-install", which installs into "~/.cabal/bin" by
@@ -401,19 +373,15 @@ installParser =
    <|> (Right <$> installOpts)
 where
  installGHCFooter :: String
-  installGHCFooter = [s|Discussion:
+  installGHCFooter = [i|Discussion:
  Installs the specified GHC version (or a recommended default one) into
  a self-contained "~/.ghcup/ghc/<ghcver>" directory
-  and symlinks the ghc binaries to "~/.ghcup/bin/<binary>-<ghcver>".
-
-Examples:
-  # install 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|]
+  and symlinks the ghc binaries to "~/.ghcup/bin/<binary>-<ghcver>".|]


 installOpts :: Parser InstallOptions
 installOpts =
-  (\p u v -> InstallOptions v p u)
+  (flip InstallOptions)
    <$> (optional
          (option
            (eitherReader platformParser)
@@ -425,17 +393,6 @@ installOpts =
            )
          )
        )
-    <*> (optional
-          (option
-            (eitherReader bindistParser)
-            (  short 'u'
-            <> long "url"
-            <> metavar "BINDIST_URL"
-            <> help
-                 "Provide DownloadInfo as json string, e.g.: '{ \"dlHash\": \"<sha256 hash>\", \"dlSubdir\": { \"RegexDir\": \"ghc-.*\"}, \"dlUri\": \"<uri>\" }'"
-            )
-          )
-        )
    <*> optional toolVersionArgument


@@ -467,13 +424,13 @@ setParser =
    <|> (Right <$> setOpts)
 where
  setGHCFooter :: String
-  setGHCFooter = [s|Discussion:
+  setGHCFooter = [i|Discussion:
    Sets the the current GHC version by creating non-versioned
    symlinks for all ghc binaries of the specified version in
    "~/.ghcup/bin/<binary>".|]

  setCabalFooter :: String
-  setCabalFooter = [s|Discussion:
+  setCabalFooter = [i|Discussion:
    Sets the the current Cabal version.|]


@@ -573,7 +530,7 @@ compileP = subparser
       )
  )
 where
-  compileFooter = [s|Discussion:
+  compileFooter = [i|Discussion:
  Compiles and installs the specified GHC version into
  a self-contained "~/.ghcup/ghc/<ghcver>" directory
  and symlinks the ghc binaries to "~/.ghcup/bin/<binary>-<ghcver>".
@@ -819,19 +776,15 @@ platformParser s' = case MP.parse (platformP <* MP.eof) "" (T.pack s') of
        pure v


-bindistParser :: String -> Either String DownloadInfo
-bindistParser = eitherDecode . BLU.fromString


-toSettings :: Options -> IO Settings
-toSettings Options {..} = do
+toSettings :: Options -> Settings
+toSettings Options {..} =
  let cache      = optCache
      noVerify   = optNoVerify
      keepDirs   = optKeepDirs
      downloader = optsDownloader
-      verbose    = optVerbose
-  dirs <- getDirs
-  pure $ Settings { execCb     = (\_ _ _ _ _ -> liftIO $ HPath.IO.writeFile [HPath.abs|/home/jule/git/ghcup-hs/cb.log|] Nothing "toSettings"), ..}
+  in  Settings { .. }


 upgradeOptsP :: Parser UpgradeOpts
@@ -890,7 +843,7 @@ main = do
        <> internal
        )

-  let main_footer = [s|Discussion:
+  let main_footer = [i|Discussion:
  ghcup installs the Glasgow Haskell Compiler from the official
  release channels, enabling you to easily switch between different
  versions. It maintains a self-contained ~/.ghcup directory.
@@ -907,19 +860,19 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
            (footerDoc (Just $ text main_footer))
      )
    >>= \opt@Options {..} -> do
-          settings@Settings{dirs = Dirs{..}, ..} <- toSettings opt
+          let settings@Settings{..} = toSettings opt

          -- create ~/.ghcup dir
-          createDirRecursive newDirPerms baseDir
+          ghcdir <- ghcupBaseDir
+          createDirIfMissing newDirPerms ghcdir

          -- logger interpreter
-          logfile <- flip runReaderT settings $ initGHCupFileLogging [rel|ghcup.log|]
-          let loggerConfig = LoggerConfig
+          logfile <- initGHCupFileLogging [rel|ghcup.log|]
+          let runLogger = myLoggerT LoggerConfig
                { lcPrintDebug = optVerbose
                , colorOutter  = B.hPut stderr
                , rawOutter    = appendFile logfile
                }
-          let runLogger = myLoggerT loggerConfig


          -------------------------
@@ -933,18 +886,17 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                  . runE
                    @'[ AlreadyInstalled
                      , UnknownArchive
-#if !defined(TAR)
-                      , ArchiveResult
-#endif
+                      , DistroNotFound
                      , FileDoesNotExistError
                      , CopyError
+                      , NoCompatibleArch
                      , NoDownload
                      , NotInstalled
+                      , NoCompatiblePlatform
                      , BuildFailed
                      , TagNotFound
                      , DigestError
                      , DownloadFailed
-                      , TarDirDoesNotExist
                      ]

          let
@@ -955,20 +907,20 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                  @'[ FileDoesNotExistError
                    , NotInstalled
                    , TagNotFound
+                    , TagNotFound
                    ]

          let
            runSetCabal =
              runLogger
-                . flip runReaderT settings
                . runE
                  @'[ NotInstalled
                    , TagNotFound
                    ]

-          let runListGHC = runLogger . flip runReaderT settings
+          let runListGHC = runLogger . runE @'[NoCompatiblePlatform, NoCompatibleArch, DistroNotFound]

-          let runRm =
+          let runRmGHC =
                runLogger . flip runReaderT settings . runE @'[NotInstalled]

          let runDebugInfo =
@@ -985,16 +937,15 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                    @'[ AlreadyInstalled
                      , BuildFailed
                      , DigestError
+                      , DistroNotFound
                      , DownloadFailed
                      , GHCupSetError
+                      , NoCompatibleArch
+                      , NoCompatiblePlatform
                      , NoDownload
                      , NotFoundInPATH
                      , PatchFailed
                      , UnknownArchive
-                      , TarDirDoesNotExist
-#if !defined(TAR)
-                      , ArchiveResult
-#endif
                      ]

          let runCompileCabal =
@@ -1006,15 +957,14 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                      , BuildFailed
                      , CopyError
                      , DigestError
+                      , DistroNotFound
                      , DownloadFailed
+                      , NoCompatibleArch
+                      , NoCompatiblePlatform
                      , NoDownload
                      , NotInstalled
                      , PatchFailed
                      , UnknownArchive
-                      , TarDirDoesNotExist
-#if !defined(TAR)
-                      , ArchiveResult
-#endif
                      ]

          let runUpgrade =
@@ -1023,6 +973,9 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                  . runResourceT
                  . runE
                    @'[ DigestError
+                      , DistroNotFound
+                      , NoCompatiblePlatform
+                      , NoCompatibleArch
                      , NoDownload
                      , NoUpdate
                      , FileDoesNotExistError
@@ -1031,19 +984,9 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                      ]


-          ----------------------------------------
-          -- Getting download and platform info --
-          ----------------------------------------
-
-          pfreq <- (
-            runLogger . runE @'[NoCompatiblePlatform, NoCompatibleArch, DistroNotFound] . liftE $ platformRequest
-            ) >>= \case
-                    VRight r -> pure r
-                    VLeft e -> do
-                      runLogger
-                        ($(logError) [i|Error determining Platform: #{e}|])
-                      exitWith (ExitFailure 2)
-
+          ---------------------------
+          -- Getting download info --
+          ---------------------------

          (GHCupInfo treq dls) <-
            ( runLogger
@@ -1058,11 +1001,14 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                      runLogger
                        ($(logError) [i|Error fetching download info: #{e}|])
                      exitWith (ExitFailure 2)
-
-          case optCommand of
-            Upgrade _ _ -> pure ()
-            _ -> runLogger $ flip runReaderT settings $ checkForUpdates dls pfreq
-
+          (runLogger
+              . runE @'[NoCompatiblePlatform, NoCompatibleArch, DistroNotFound] $ checkForUpdates dls
+              )
+              >>= \case
+                    VRight _ -> pure ()
+                    VLeft  e -> do
+                      runLogger
+                        ($(logError) [i|Error checking for upgrades: #{e}|])


          -----------------------
@@ -1072,9 +1018,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
          let installGHC InstallOptions{..} =
                  (runInstTool $ do
                      v <- liftE $ fromVersion dls instVer GHC
-                      case instBindist of
-                        Nothing -> liftE $ installGHCBin dls (_tvVersion v) (fromMaybe pfreq instPlatform)
-                        Just uri -> liftE $ installGHCBindist uri (_tvVersion v) (fromMaybe pfreq instPlatform)
+                      liftE $ installGHCBin dls (_tvVersion v) instPlatform -- FIXME: ugly sharing of tool version
                    )
                    >>= \case
                          VRight _ -> do
@@ -1088,7 +1032,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                            case keepDirs of
                              Never -> runLogger ($(logError) [i|Build failed with #{e}|])
                              _ -> runLogger ($(logError) [i|Build failed with #{e}
-    Check the logs at #{logsDir} and the build directory #{tmpdir} for more clues.
+    Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.
    Make sure to clean up #{tmpdir} afterwards.|])
                            pure $ ExitFailure 3
                          VLeft (V NoDownload) -> do
@@ -1101,16 +1045,14 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                          VLeft e -> do
                            runLogger $ do
                              $(logError) [i|#{e}|]
-                              $(logError) [i|Also check the logs in #{logsDir}|]
+                              $(logError) [i|Also check the logs in ~/.ghcup/logs|]
                            pure $ ExitFailure 3


          let installCabal InstallOptions{..} =
                (runInstTool $ do
                    v <- liftE $ fromVersion dls instVer Cabal
-                    case instBindist of
-                      Nothing -> liftE $ installCabalBin dls (_tvVersion v) (fromMaybe pfreq instPlatform)
-                      Just uri -> liftE $ installCabalBindist uri (_tvVersion v) (fromMaybe pfreq instPlatform)
+                    liftE $ installCabalBin dls (_tvVersion v) instPlatform -- FIXME: ugly sharing of tool version
                  )
                  >>= \case
                        VRight _ -> do
@@ -1130,7 +1072,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                        VLeft e -> do
                          runLogger $ do
                            $(logError) [i|#{e}|]
-                            $(logError) [i|Also check the logs in #{logsDir}|]
+                            $(logError) [i|Also check the logs in ~/.ghcup/logs|]
                          pure $ ExitFailure 4

          let setGHC' SetOptions{..} =
@@ -1160,7 +1102,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                          pure $ ExitFailure 14

          let rmGHC' RmOptions{..} =
-                (runRm $ do
+                (runRmGHC $ do
                    liftE $ rmGHCVer ghcVer
                  )
                  >>= \case
@@ -1170,7 +1112,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                          pure $ ExitFailure 7

          let rmCabal' tv =
-                (runRm $ do
+                (runSetCabal $ do
                    liftE $ rmCabalVer tv
                  )
                  >>= \case
@@ -1182,9 +1124,6 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]


          res <- case optCommand of
-#if defined(BRICK)
-            Interactive -> liftIO $ brickMain settings optUrlSource loggerConfig dls pfreq >> pure ExitSuccess
-#endif
            Install (Right iopts) -> do
              runLogger ($(logWarn) [i|This is an old-style command for installing GHC. Use 'ghcup install ghc' instead.|])
              installGHC iopts
@@ -1202,10 +1141,16 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]

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

            Rm (Right rmopts) -> do
              runLogger ($(logWarn) [i|This is an old-style command for removing GHC. Use 'ghcup rm ghc' instead.|])
@@ -1232,7 +1177,6 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                                                  buildConfig
                                                  patchDir
                                                  addConfArgs
-                                                  pfreq
                )
                >>= \case
                      VRight _ -> do
@@ -1246,9 +1190,9 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                      VLeft (V (BuildFailed tmpdir e)) -> do
                        case keepDirs of
                          Never -> runLogger ($(logError) [i|Build failed with #{e}
-Check the logs at #{logsDir}|])
+Check the logs at ~/.ghcup/logs|])
                          _ -> runLogger ($(logError) [i|Build failed with #{e}
-Check the logs at #{logsDir} and the build directory #{tmpdir} for more clues.
+Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.
 Make sure to clean up #{tmpdir} afterwards.|])
                        pure $ ExitFailure 9
                      VLeft e -> do
@@ -1257,7 +1201,7 @@ Make sure to clean up #{tmpdir} afterwards.|])

            Compile (CompileCabal CabalCompileOptions {..}) ->
              (runCompileCabal $ do
-                  liftE $ compileCabal dls targetVer bootstrapGhc jobs patchDir pfreq
+                  liftE $ compileCabal dls targetVer bootstrapGhc jobs patchDir
                )
                >>= \case
                      VRight _ -> do
@@ -1270,7 +1214,7 @@ Make sure to clean up #{tmpdir} afterwards.|])
                        case keepDirs of
                          Never -> runLogger ($(logError) [i|Build failed with #{e}|])
                          _ -> runLogger ($(logError) [i|Build failed with #{e}
-Check the logs at #{logsDir} and the build directory #{tmpdir} for more clues.
+Check the logs at ~/.ghcup/logs and the build directory #{tmpdir} for more clues.
 Make sure to clean up #{tmpdir} afterwards.|])
                        pure $ ExitFailure 10
                      VLeft e -> do
@@ -1284,9 +1228,11 @@ Make sure to clean up #{tmpdir} afterwards.|])
                  p   <- parseAbs . E.encodeUtf8 . T.pack $ efp
                  pure $ Just p
                (UpgradeAt p)   -> pure $ Just p
-                UpgradeGHCupDir -> pure (Just (binDir </> [rel|ghcup|]))
+                UpgradeGHCupDir -> do
+                  bdir <- liftIO $ ghcupBinDir
+                  pure (Just (bdir </> [rel|ghcup|]))

-              (runUpgrade $ (liftE $ upgradeGHCup dls target force pfreq)) >>= \case
+              (runUpgrade $ (liftE $ upgradeGHCup dls target force)) >>= \case
                VRight v' -> do
                  let pretty_v = prettyVer v'
                  runLogger $ $(logInfo)
@@ -1338,14 +1284,9 @@ Make sure to clean up #{tmpdir} afterwards.|])
                  pure ExitSuccess
                Just uri -> do
                  let uri' = T.unpack . decUTF8Safe . serializeURIRef' $ uri
-                      cmd = case _rPlatform pfreq of
-                              Darwin  -> "open"
-                              Linux _ -> "xdg-open"
-                              FreeBSD -> "xdg-open"
-
                  if clOpen
                    then
-                      exec cmd
+                      exec "xdg-open"
                           True
                           [serializeURIRef' uri]
                           Nothing
@@ -1429,41 +1370,45 @@ printListResult raw lr = do
 where
  printTag Recommended        = color' Green "recommended"
  printTag Latest             = color' Yellow "latest"
-  printTag Prerelease         = color' Red "prerelease"
  printTag (Base pvp'') = "base-" ++ T.unpack (prettyPVP pvp'')
  printTag (UnknownTag t    ) = t
  color' = case raw of
    True  -> flip const
    False -> color

-checkForUpdates :: (MonadReader Settings m, MonadCatch m, MonadLogger m, MonadThrow m, MonadIO m, MonadFail m, MonadLogger m)
+checkForUpdates :: (MonadCatch m, MonadLogger m, MonadThrow m, MonadIO m, MonadFail m, MonadLogger m)
                => GHCupDownloads
-                -> PlatformRequest
-                -> m ()
-checkForUpdates dls pfreq = do
+                -> Excepts
+                     '[ NoCompatiblePlatform
+                      , NoCompatibleArch
+                      , DistroNotFound
+                      ]
+                     m
+                     ()
+checkForUpdates dls = do
  forM_ (getLatest dls GHCup) $ \l -> do
    (Right ghc_ver) <- pure $ version $ prettyPVP ghcUpVer
    when (l > ghc_ver)
-      $ $(logWarn)
+      $ lift $ $(logWarn)
          [i|New GHCup version available: #{prettyVer l}. To upgrade, run 'ghcup upgrade'|]

  forM_ (getLatest dls GHC) $ \l -> do
    mghc_ver <- latestInstalled GHC
    forM mghc_ver $ \ghc_ver ->
      when (l > ghc_ver)
-        $ $(logWarn)
+        $ lift $ $(logWarn)
            [i|New GHC version available: #{prettyVer l}. To upgrade, run 'ghcup install ghc #{prettyVer l}'|]

  forM_ (getLatest dls Cabal) $ \l -> do
    mcabal_ver <- latestInstalled Cabal
    forM mcabal_ver $ \cabal_ver ->
      when (l > cabal_ver)
-        $ $(logWarn)
+        $ lift $ $(logWarn)
            [i|New Cabal version available: #{prettyVer l}. To upgrade, run 'ghcup install cabal #{prettyVer l}'|]

 where
  latestInstalled tool = (fmap lVer . lastMay)
-    <$> (listVersions dls (Just tool) (Just ListInstalled) pfreq)
+    <$> (listVersions dls (Just tool) (Just ListInstalled))


 prettyDebugInfo :: DebugInfo -> String
@@ -1480,13 +1425,6 @@ Version: #{describe_result}|]
  prettyArch :: Architecture -> String
  prettyArch A_64 = "amd64"
  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 = "ARM64"
-
  prettyPlatform :: PlatformResult -> String
  prettyPlatform PlatformResult { _platform = plat, _distroVersion = Just v' }
    = show plat <> ", " <> show v'
--- a/130
+++ b/130
@@ -4,17 +4,6 @@
 (

 : "${GHCUP_INSTALL_BASE_PREFIX:=$HOME}"
-
-export GHCUP_USE_XDG_DIRS
-
-if [ -n "${GHCUP_USE_XDG_DIRS}" ] ; then
-	GHCUP_DIR=${XDG_DATA_HOME:=$HOME/.local}/ghcup
-	GHCUP_BIN=${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}"

@@ -29,55 +18,26 @@ edo()
 }

 eghcup() {
-	edo _eghcup "$@"
-}
-
-_eghcup() {
    if [ -z "${BOOTSTRAP_HASKELL_VERBOSE}" ] ; then
-        ghcup "$@"
+        edo ghcup "$@"
    else
-        ghcup --verbose "$@"
+        edo ghcup --verbose "$@"
    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="0.1.10"
-	_base_url="https://downloads.haskell.org/~ghcup"
+	_ghver="0.1.5"

    case "${_plat}" in
        "linux"|"Linux")
 			case "${_arch}" in
 				x86_64|amd64)
-					# we could be in a 32bit docker container, in which
-					# case uname doesn't give us what we want
-					if [ "$(getconf LONG_BIT)" = "32" ] ; then
-						_url=${_base_url}/${_ghver}/i386-linux-ghcup-${_ghver}
-					elif [ "$(getconf LONG_BIT)" = "64" ] ; then
-						_url=${_base_url}/${_ghver}/x86_64-linux-ghcup-${_ghver}
-					else
-						die "Unknown long bit size: $(getconf LONG_BIT)"
-					fi
+					_url=https://downloads.haskell.org/~ghcup/${_ghver}/x86_64-linux-ghcup-${_ghver}
 					;;
 				i*86)
-					_url=${_base_url}/${_ghver}/i386-linux-ghcup-${_ghver}
+					_url=https://downloads.haskell.org/~ghcup/${_ghver}/i386-linux-ghcup-${_ghver}
 					;;
 				*) die "Unknown architecture: ${_arch}"
 					;;
@@ -93,7 +53,7 @@ download_ghcup() {
 				*) die "Unknown architecture: ${_arch}"
 					;;
 			esac
-			_url=${_base_url}/${_ghver}/x86_64-portbld-freebsd-ghcup-${_ghver}
+			_url=https://downloads.haskell.org/~ghcup/${_ghver}/x86_64-portbld-freebsd-ghcup-${_ghver}
            ;;
        "Darwin"|"darwin")
 			case "${_arch}" in
@@ -105,23 +65,14 @@ download_ghcup() {
 				*) die "Unknown architecture: ${_arch}"
 					;;
 			esac
-			_url=${_base_url}/${_ghver}/x86_64-apple-darwin-ghcup-${_ghver} ;;
+			_url=https://downloads.haskell.org/~ghcup/0.1.5/x86_64-apple-darwin-ghcup-0.1.5-p2 ;;
        *) die "Unknown platform: ${_plat}"
 			;;
    esac

-	edo curl -Lf "${_url}" > "${GHCUP_BIN}"/ghcup
+	edo curl -Lf "${_url}" > "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/ghcup

-    edo chmod +x "${GHCUP_BIN}"/ghcup
-
-	cat <<-EOF > "${GHCUP_DIR}"/env || die "Failed to create env file"
-		export PATH="\$HOME/.cabal/bin:${GHCUP_BIN}:\$PATH"
-		EOF
-	# shellcheck disable=SC1090
-    edo . "${GHCUP_DIR}"/env
-    eghcup upgrade
-
-	unset _plat _arch _url _ghver _base_url
+	unset _plat _arch _url _ghver
 }


@@ -129,19 +80,12 @@ echo
 echo "Welcome to Haskell!"
 echo
 echo "This script will download and install the following binaries:"
-echo "  * ghcup - The Haskell toolchain installer"
-echo "            (for managing GHC/cabal versions)"
+echo "  * ghcup - The Haskell toolchain installer (for managing GHC/cabal versions)"
 echo "  * ghc   - The Glasgow Haskell Compiler"
 echo "  * cabal - The Cabal build tool"
 echo
-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 "ghcup installs only into the following directory, which can be removed anytime:"
+echo "  $GHCUP_INSTALL_BASE_PREFIX/.ghcup"
 echo

 if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
@@ -153,14 +97,22 @@ if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
    read -r answer </dev/tty
 fi

-edo mkdir -p "${GHCUP_BIN}"
+edo mkdir -p "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin

 if command -V "ghcup" >/dev/null 2>&1 ; then
    if [ -z "${BOOTSTRAP_HASKELL_NO_UPGRADE}" ] ; then
-        _eghcup upgrade || download_ghcup
+        eghcup upgrade
    fi
 else
 	download_ghcup
+    edo chmod +x "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/bin/ghcup
+
+	cat <<-EOF > "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/env || die "Failed to create env file"
+		export PATH="\$HOME/.cabal/bin:\${GHCUP_INSTALL_BASE_PREFIX:=\$HOME}/.ghcup/bin:\$PATH"
+		EOF
+	# shellcheck disable=SC1090
+    edo . "${GHCUP_INSTALL_BASE_PREFIX}"/.ghcup/env
+    eghcup upgrade
 fi

 echo
@@ -177,10 +129,10 @@ if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
    read -r answer </dev/tty
 fi

-eghcup --cache install ghc "${BOOTSTRAP_HASKELL_GHC_VERSION}"
+eghcup --cache install "${BOOTSTRAP_HASKELL_GHC_VERSION}"

-eghcup set ghc "${BOOTSTRAP_HASKELL_GHC_VERSION}"
-eghcup --cache install cabal "${BOOTSTRAP_HASKELL_CABAL_VERSION}"
+eghcup set "${BOOTSTRAP_HASKELL_GHC_VERSION}"
+eghcup --cache install-cabal "${BOOTSTRAP_HASKELL_CABAL_VERSION}"

 edo cabal new-update

@@ -190,7 +142,7 @@ printf "\\033[0;35m%s\\033[0m\\n" ""

 if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
    echo "In order to run ghc and cabal, you need to adjust your PATH variable."
-    echo "You may want to source '$GHCUP_DIR/env' in your shell"
+    echo "You may want to source '$GHCUP_INSTALL_BASE_PREFIX/.ghcup/env' in your shell"
    echo "configuration to do so (e.g. ~/.bashrc)."

 	case $SHELL in
@@ -208,13 +160,10 @@ if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then
 				GHCUP_PROFILE_FILE="$HOME/.zshrc"
 				MY_SHELL="zsh"
 			else
-			    _done
+				exit 0
 			fi
 			;;
-		*/fish) # login shell is fish
-			GHCUP_PROFILE_FILE="$HOME/.config/fish/config.fish"
-			MY_SHELL="fish" ;;
-		*) _done ;;
+		*) exit 0 ;;
 	esac


@@ -229,27 +178,12 @@ if [ -z "${BOOTSTRAP_HASKELL_NONINTERACTIVE}" ] ; then

        case $next_answer in
            [Yy]*)
-				case $MY_SHELL in
-					"") break ;;
-					fish)
-						if ! grep -q "ghcup-env" "${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 $GHCUP_BIN/bin \$PATH" >> "${GHCUP_PROFILE_FILE}"
-						fi
-						break ;;
-					*)
-						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
+                echo "[ -f \"\${GHCUP_INSTALL_BASE_PREFIX:=\$HOME}/.ghcup/env\" ] && source \"\${GHCUP_INSTALL_BASE_PREFIX:=\$HOME}/.ghcup/env\"" >> "${GHCUP_PROFILE_FILE}"
                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_DIR}/env\" to apply them in your current terminal session."
-				_done
-                ;;
+                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;;
            [Nn]*)
-                _done ;;
+                exit 0;;
            *)
                echo "Please type YES or NO and press enter.";;
        esac
--- a/cabal.project
+++ b/cabal.project
@@ -2,12 +2,6 @@ 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
-
 optimization: 2

 package streamly
@@ -16,9 +10,9 @@ package streamly
 package ghcup
    ghc-options: -O2 -fspec-constr-recursive=16 -fmax-worker-args=16

+package tar-bytestring
+    ghc-options: -O2
+
 constraints: http-io-streams -brotli

-package libarchive
-  flags: +static
-
-allow-newer: base, ghc-prim, template-haskell
+allow-newer: base
--- a/ghcup-0.0.2.json
+++ b/ghcup-0.0.2.json
--- a/ghcup-0.0.2.yaml
+++ b/ghcup-0.0.2.yaml
--- a/ghcup.cabal
+++ b/ghcup.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               ghcup
-version:            0.1.10
+version:            0.1.5
 synopsis:           ghc toolchain installer as an exe/library
 description:
  A rewrite of the shell script ghcup, for providing
@@ -21,21 +21,11 @@ source-repository head
  type:     git
  location: https://gitlab.haskell.org/haskell/ghcup-hs.git

-flag tui
-  description: Build the brick powered tui (ghcup tui)
-  default:     False
-  manual:      True
-
 flag internal-downloader
  description: Compile the internal downloader, which links against OpenSSL
  default:     False
  manual:      True

-flag tar
-  description: Use tar-bytestring instead of libarchive
-  default:     False
-  manual:      True
-
 common HsOpenSSL
  build-depends: HsOpenSSL >=0.11.4.18

@@ -60,9 +50,6 @@ common base16-bytestring
 common binary
  build-depends: binary >=0.8.6.0

-common brick
-  build-depends: brick >=0.54
-
 common bytestring
  build-depends: bytestring >=0.10

@@ -94,13 +81,13 @@ common hpath
  build-depends: hpath >=0.11

 common hpath-directory
-  build-depends: hpath-directory >=0.14
+  build-depends: hpath-directory >=0.13.3

 common hpath-filepath
  build-depends: hpath-filepath >=0.10.3

 common hpath-io
-  build-depends: hpath-io >=0.14
+  build-depends: hpath-io >=0.13.1

 common hpath-posix
  build-depends: hpath-posix >=0.13.2
@@ -111,8 +98,8 @@ common http-io-streams
 common io-streams
  build-depends: io-streams >=1.5

-common libarchive
-  build-depends: libarchive >= 2.2.5.0
+common language-bash
+  build-depends: language-bash >=0.9

 common lzma
  build-depends: lzma >=0.0.0.3
@@ -153,9 +140,6 @@ 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

@@ -174,17 +158,17 @@ common string-interpolate
 common table-layout
  build-depends: table-layout >=0.8

-common template-haskell
-  build-depends: template-haskell >=2.7
-
 common tar-bytestring
  build-depends: tar-bytestring >=0.6.3.1

+common template-haskell
+  build-depends: template-haskell >=2.7
+
 common terminal-progress-bar
  build-depends: terminal-progress-bar >=0.4.1

 common text
-  build-depends: text >=1.2.4.0
+  build-depends: text >=1.2

 common time
  build-depends: time >=1.9.3
@@ -192,18 +176,12 @@ common time
 common transformers
  build-depends: transformers >=0.5

-common os-release
-  build-depends: os-release >=1.0.0
-
 common unix
  build-depends: unix >=2.7

 common unix-bytestring
  build-depends: unix-bytestring >=0.3

-common unordered-containers
-  build-depends: unordered-containers >= 0.2.10.0
-
 common uri-bytestring
  build-depends: uri-bytestring >=0.3.2.2

@@ -216,15 +194,12 @@ common vector
 common versions
  build-depends: versions >=3.5

-common vty
-  build-depends: vty >=5.28.2
+common waargonaut
+  build-depends: waargonaut >=0.8

 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

@@ -267,6 +242,7 @@ library
    , hpath-filepath
    , hpath-io
    , hpath-posix
+    , language-bash
    , lzma
    , megaparsec
    , monad-logger
@@ -279,30 +255,30 @@ library
    , resourcet
    , safe
    , safe-exceptions
-    , split
    , streamly
    , streamly-posix
    , streamly-bytestring
    , strict-base
    , string-interpolate
+    , tar-bytestring
    , template-haskell
    , text
    , time
    , transformers
-    , os-release
    , unix
    , unix-bytestring
-    , unordered-containers
    , uri-bytestring
    , utf8-string
    , vector
    , versions
    , word8
-    , yaml
    , zlib

  exposed-modules:
    GHCup
+    GHCup.Data.GHCupDownloads
+    GHCup.Data.GHCupInfo
+    GHCup.Data.ToolRequirements
    GHCup.Download
    GHCup.Download.Utils
    GHCup.Errors
@@ -312,6 +288,7 @@ library
    GHCup.Types.JSON
    GHCup.Types.Optics
    GHCup.Utils
+    GHCup.Utils.Bash
    GHCup.Utils.Dirs
    GHCup.Utils.File
    GHCup.Utils.Logger
@@ -327,26 +304,17 @@ library

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

-  if flag(tar)
-    import:
-        tar-bytestring
-    cpp-options:     -DTAR
-  else
-    import:
-        libarchive
-
 executable ghcup
  import:
    config
    , base
-    , aeson
    , bytestring
    , containers
    , haskus-utils-variant
@@ -364,7 +332,6 @@ executable ghcup
    , table-layout
    , template-haskell
    , text
-    , unix-bytestring
    , uri-bytestring
    , utf8-string
    , versions
@@ -381,19 +348,6 @@ executable ghcup
  if flag(internal-downloader)
    cpp-options:     -DINTERNAL_DOWNLOADER

-  if flag(tui)
-    import:
-      brick
-      , vector
-      , vty
-    other-modules: BrickMain
-    cpp-options:     -DBRICK
-
-  if flag(tar)
-    cpp-options:     -DTAR
-  else
-    import:
-        libarchive

 executable ghcup-gen
  import:
@@ -419,7 +373,6 @@ executable ghcup-gen
    , uri-bytestring
    , utf8-string
    , versions
-    , yaml

  --
  main-is:          Main.hs
--- a/hie.yaml
+++ b/hie.yaml
@@ -1,4 +0,0 @@
-cradle:
-  cabal:
-    - path: "."
-      component: "ghcup:lib:ghcup"
--- a/lib/GHCup.hs
+++ b/lib/GHCup.hs
--- a/lib/GHCup/Data/GHCupDownloads.hs
+++ b/lib/GHCup/Data/GHCupDownloads.hs
--- a/lib/GHCup/Data/GHCupInfo.hs
+++ b/lib/GHCup/Data/GHCupInfo.hs
@@ -0,0 +1,11 @@
+module GHCup.Data.GHCupInfo where
+
+import           GHCup.Data.GHCupDownloads
+import           GHCup.Data.ToolRequirements
+import           GHCup.Types
+
+
+ghcupInfo :: GHCupInfo
+ghcupInfo = GHCupInfo { _toolRequirements = toolRequirements
+                      , _ghcupDownloads   = ghcupDownloads
+                      }
--- a/lib/GHCup/Data/ToolRequirements.hs
+++ b/lib/GHCup/Data/ToolRequirements.hs
@@ -0,0 +1,147 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE QuasiQuotes       #-}
+
+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"
+                  ]
+                  ""
+                )
+              ]
+            )
+          ]
+        )
+      ]
+    )
+  ]
--- a/lib/GHCup/Download.hs
+++ b/lib/GHCup/Download.hs
@@ -9,23 +9,6 @@
 {-# LANGUAGE TypeFamilies          #-}


-{-|
-Module      : GHCup.Download
-Description : Downloading
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-
-Module for handling all download related functions.
-
-Generally we support downloading via:
-
-  - curl (default)
-  - wget
-  - internal downloader (only when compiled)
-}
 module GHCup.Download where

 #if defined(INTERNAL_DOWNLOADER)
@@ -52,7 +35,6 @@ 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 )
@@ -68,7 +50,7 @@ import           Data.Versions
 import           Data.Word8
 import           GHC.IO.Exception
 import           HPath
-import           HPath.IO                     as HIO hiding ( hideError )
+import           HPath.IO                      as HIO
 import           Haskus.Utils.Variant.Excepts
 import           Optics
 import           Prelude                 hiding ( abs
@@ -89,7 +71,6 @@ 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
@@ -105,7 +86,7 @@ import qualified System.Posix.RawFilePath.Directory


 -- | Like 'getDownloads', but tries to fall back to
-- cached ~/.ghcup/cache/ghcup-<format-ver>.yaml
+-- cached ~/.ghcup/cache/ghcup-<format-ver>.json
 getDownloadsF :: ( FromJSONKey Tool
                 , FromJSONKey Version
                 , FromJSON VersionInfo
@@ -133,17 +114,17 @@ getDownloadsF urlSource = do
    (OwnSpec   _) -> liftE $ getDownloads urlSource
 where
  readFromCache = do
-    Settings {dirs = Dirs {..}} <- lift ask
    lift $ $(logWarn)
      [i|Could not get download info, trying cached version (this may not be recent!)|]
    let path = view pathL' ghcupURL
-    yaml_file <- (cacheDir </>) <$> urlBaseName path
+    cacheDir  <- liftIO $ ghcupCacheDir
+    json_file <- (cacheDir </>) <$> urlBaseName path
    bs        <-
      handleIO' NoSuchThing
-                (\_ -> throwE $ FileDoesNotExistError (toFilePath yaml_file))
+                (\_ -> throwE $ FileDoesNotExistError (toFilePath json_file))
      $ liftIO
-      $ readFile yaml_file
-    lE' JSONDecodeError $ bimap show id $ Y.decodeEither' (L.toStrict bs)
+      $ readFile json_file
+    lE' JSONDecodeError $ eitherDecode' bs


 -- | Downloads the download information! But only if we need to ;P
@@ -164,10 +145,10 @@ getDownloads urlSource = do
  case urlSource of
    GHCupURL -> do
      bs <- reThrowAll DownloadFailed $ smartDl ghcupURL
-      lE' JSONDecodeError $ bimap show id $ Y.decodeEither' (L.toStrict bs)
+      lE' JSONDecodeError $ eitherDecode' bs
    (OwnSource url) -> do
      bs <- reThrowAll DownloadFailed $ downloadBS url
-      lE' JSONDecodeError $ bimap show id $ Y.decodeEither' (L.toStrict bs)
+      lE' JSONDecodeError $ eitherDecode' bs
    (OwnSpec av) -> pure $ av

 where
@@ -200,8 +181,8 @@ getDownloads urlSource = do
               m1
               L.ByteString
  smartDl uri' = do
-    Settings {dirs = Dirs {..}} <- lift ask
    let path = view pathL' uri'
+    cacheDir  <- liftIO $ ghcupCacheDir
    json_file <- (cacheDir </>) <$> urlBaseName path
    e         <- liftIO $ doesFileExist json_file
    if e
@@ -226,7 +207,7 @@ getDownloads urlSource = do
          else -- access in less than 5 minutes, re-use file
               liftIO $ readFile json_file
      else do
-        liftIO $ createDirRecursive newDirPerms cacheDir
+        liftIO $ createDirIfMissing newDirPerms cacheDir
        getModTime >>= \case
          Just modTime -> dlWithMod modTime json_file
          Nothing -> do
@@ -289,10 +270,7 @@ getDownloadInfo :: Tool
 getDownloadInfo t v (PlatformRequest a p mv) dls = maybe
  (Left NoDownload)
  Right
-  (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
@@ -392,15 +370,15 @@ downloadCached dli mfn = do
  cache <- lift getCache
  case cache of
    True -> do
-      Settings {dirs = Dirs {..}} <- lift ask
+      cachedir <- liftIO $ ghcupCacheDir
      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
--- a/lib/GHCup/Download/IOStreams.hs
+++ b/lib/GHCup/Download/IOStreams.hs
@@ -13,7 +13,6 @@ module GHCup.Download.IOStreams where

 import           GHCup.Download.Utils
 import           GHCup.Errors
-import           GHCup.Types
 import           GHCup.Types.Optics
 import           GHCup.Types.JSON               ( )
 import           GHCup.Utils.File
--- a/lib/GHCup/Errors.hs
+++ b/lib/GHCup/Errors.hs
@@ -3,15 +3,6 @@
 {-# LANGUAGE StandaloneDeriving #-}
 {-# LANGUAGE DataKinds #-}

-{-|
-Module      : GHCup.Errors
-Description : GHCup error types
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Errors where

 import           GHCup.Types
@@ -89,9 +80,6 @@ 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
--- a/lib/GHCup/Platform.hs
+++ b/lib/GHCup/Platform.hs
@@ -6,21 +6,13 @@
 {-# LANGUAGE TemplateHaskell       #-}


-{-|
-Module      : GHCup.Plaform
-Description : Retrieving platform information
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Platform where


 import           GHCup.Errors
 import           GHCup.Types
 import           GHCup.Types.JSON               ( )
+import           GHCup.Utils.Bash
 import           GHCup.Utils.File
 import           GHCup.Utils.Prelude
 import           GHCup.Utils.String.QQ
@@ -44,7 +36,6 @@ import           Prelude                 hiding ( abs
                                                , writeFile
                                                )
 import           System.Info
-import           System.OsRelease
 import           Text.Regex.Posix

 import qualified Data.Text                     as T
@@ -57,7 +48,10 @@ import qualified Data.Text                     as T
 -- | Get the full platform request, consisting of architecture, distro, ...
 platformRequest :: (MonadLogger m, MonadCatch m, MonadIO m)
                => Excepts
-                     '[NoCompatiblePlatform, NoCompatibleArch, DistroNotFound]
+                     '[ NoCompatiblePlatform
+                      , NoCompatibleArch
+                      , DistroNotFound
+                      ]
                     m
                     PlatformRequest
 platformRequest = do
@@ -68,21 +62,15 @@ platformRequest = do

 getArchitecture :: Either NoCompatibleArch Architecture
 getArchitecture = case arch of
-  "x86_64"      -> Right A_64
-  "i386"        -> Right A_32
-  "powerpc"     -> Right A_PowerPC
-  "powerpc64"   -> Right A_PowerPC64
-  "powerpc64le" -> Right A_PowerPC64
-  "sparc"       -> Right A_Sparc
-  "sparc64"     -> Right A_Sparc64
-  "arm"         -> Right A_ARM
-  "aarch64"     -> Right A_ARM64
-  what          -> Left (NoCompatibleArch what)
+  "x86_64" -> Right A_64
+  "i386"   -> Right A_32
+  what     -> Left (NoCompatibleArch what)
+


 getPlatform :: (MonadLogger m, MonadCatch m, MonadIO m)
            => Excepts
-                 '[NoCompatiblePlatform, DistroNotFound]
+                 '[NoCompatiblePlatform , DistroNotFound]
                 m
                 PlatformResult
 getPlatform = do
@@ -94,7 +82,6 @@ getPlatform = do
      ver <-
        ( either (const Nothing) Just
          . versioning
-          -- TODO: maybe do this somewhere else
          . getMajorVersion
          . decUTF8Safe
          )
@@ -124,6 +111,7 @@ getLinuxDistro = do
  (name, ver) <- handleIO (\_ -> throwE DistroNotFound) $ liftIO $ asum
    [ try_os_release
    , try_lsb_release_cmd
+    , try_lsb_release
    , try_redhat_release
    , try_debian_version
    ]
@@ -148,6 +136,10 @@ getLinuxDistro = do
   where
    regex x = makeRegexOpts compIgnoreCase execBlank ([s|\<|] ++ x ++ [s|\>|])

+  os_release :: Path Abs
+  os_release = [abs|/etc/os-release|]
+  lsb_release :: Path Abs
+  lsb_release = [abs|/etc/lsb-release|]
  lsb_release_cmd :: Path Rel
  lsb_release_cmd = [rel|lsb-release|]
  redhat_release :: Path Abs
@@ -157,9 +149,9 @@ getLinuxDistro = do

  try_os_release :: IO (Text, Maybe Text)
  try_os_release = do
-    Just (OsRelease { name = name, version_id = version_id }) <-
-      fmap osRelease <$> parseOsRelease
-    pure (T.pack name, fmap T.pack version_id)
+    (Just name) <- getAssignmentValueFor os_release "NAME"
+    ver         <- getAssignmentValueFor os_release "VERSION_ID"
+    pure (T.pack name, fmap T.pack ver)

  try_lsb_release_cmd :: IO (Text, Maybe Text)
  try_lsb_release_cmd = do
@@ -168,6 +160,12 @@ getLinuxDistro = do
    ver      <- fmap _stdOut $ executeOut lsb_release_cmd ["-sr"] Nothing
    pure (decUTF8Safe name, Just $ decUTF8Safe ver)

+  try_lsb_release :: IO (Text, Maybe Text)
+  try_lsb_release = do
+    (Just name) <- getAssignmentValueFor lsb_release "DISTRIB_ID"
+    ver         <- getAssignmentValueFor lsb_release "DISTRIB_RELEASE"
+    pure (T.pack name, fmap T.pack ver)
+
  try_redhat_release :: IO (Text, Maybe Text)
  try_redhat_release = do
    t <- fmap decUTF8Safe' $ readFile redhat_release
--- a/lib/GHCup/Requirements.hs
+++ b/lib/GHCup/Requirements.hs
@@ -1,14 +1,5 @@
 {-# LANGUAGE OverloadedStrings #-}

-{-|
-Module      : GHCup.Requirements
-Description : Requirements utilities
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Requirements where

 import           GHCup.Types
--- a/lib/GHCup/Types.hs
+++ b/lib/GHCup/Types.hs
@@ -1,30 +1,14 @@
-{-# OPTIONS_GHC -Wno-orphans #-}
-
 {-# LANGUAGE CPP               #-}
 {-# LANGUAGE DeriveGeneric     #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE TypeSynonymInstances #-}
-{-# LANGUAGE FlexibleInstances #-}

-{-|
-Module      : GHCup.Types
-Description : GHCup types
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Types where

-import           Control.Concurrent.MVar
-import           Data.ByteString                ( ByteString )
 import           Data.Map.Strict                ( Map )
 import           Data.Text                      ( Text )
 import           Data.Versions
 import           HPath
 import           URI.ByteString
-import           System.Posix.Types

 import qualified GHC.Generics                  as GHC

@@ -99,7 +83,6 @@ data VersionInfo = VersionInfo
 -- | A tag. These are currently attached to a version of a tool.
 data Tag = Latest
         | Recommended
-         | Prerelease
         | Base PVP
         | UnknownTag String  -- ^ used for upwardscompat
         deriving (Ord, Eq, Show) -- FIXME: manual JSON instance
@@ -107,12 +90,6 @@ data Tag = Latest

 data Architecture = A_64
                  | A_32
-                  | A_PowerPC
-                  | A_PowerPC64
-                  | A_Sparc
-                  | A_Sparc64
-                  | A_ARM
-                  | A_ARM64
  deriving (Eq, GHC.Generic, Ord, Show)


@@ -144,7 +121,7 @@ data LinuxDistro = Debian
 -- to download, extract and install a tool.
 data DownloadInfo = DownloadInfo
  { _dlUri    :: URI
-  , _dlSubdir :: Maybe TarDir
+  , _dlSubdir :: Maybe (Path Rel)
  , _dlHash   :: Text
  }
  deriving (Eq, Show)
@@ -157,12 +134,6 @@ 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, Show)
-
-
 -- | Where to fetch GHCupDownloads from.
 data URLSource = GHCupURL
               | OwnSource URI
@@ -170,48 +141,14 @@ data URLSource = GHCupURL
               deriving Show


-data ProcessError = NonZeroExit Int ByteString [ByteString]
-                  | PTerminated ByteString [ByteString]
-                  | PStopped ByteString [ByteString]
-                  | NoSuchPid ByteString [ByteString]
-                  deriving (Eq, Show)
-
-data ProcState = PRunning ProcessID
-               | PExited (Either ProcessError ())
-  deriving Eq
-
-type ExecCb =    Bool       -- verbose
-              -> Fd         -- log file fd
-              -> Fd         -- input fd to read from
-              -> MVar ProcState  -- state of the producing process
-              -> ByteString -- log filename
-              -> IO ()
-
-instance Show ExecCb where
-  show _ = "**ExecCb**"
-
-
 data Settings = Settings
-  { -- set by user
-    cache      :: Bool
+  { cache      :: Bool
  , noVerify   :: Bool
  , keepDirs   :: KeepDirs
  , downloader :: Downloader
-  , verbose    :: Bool
-
-    -- set on app start
-  , dirs       :: Dirs
-  , execCb     :: ExecCb
  }
  deriving Show

-data Dirs = Dirs
-  { baseDir  :: Path Abs
-  , binDir   :: Path Abs
-  , cacheDir :: Path Abs
-  , logsDir  :: Path Abs
-  }
-  deriving Show

 data KeepDirs = Always
              | Errors
--- a/lib/GHCup/Types/JSON.hs
+++ b/lib/GHCup/Types/JSON.hs
@@ -10,21 +10,11 @@
 {-# LANGUAGE TemplateHaskell       #-}
 {-# LANGUAGE TypeFamilies          #-}

-{-|
-Module      : GHCup.Types.JSON
-Description : GHCup JSON types/instances
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Types.JSON where

 import           GHCup.Types
 import           GHCup.Utils.Prelude

-import           Control.Applicative            ( (<|>) )
 import           Data.Aeson
 import           Data.Aeson.TH
 import           Data.Aeson.Types
@@ -54,7 +44,6 @@ deriveJSON defaultOptions { fieldLabelModifier = removeLensFieldLabel } ''Requir
 instance ToJSON Tag where
  toJSON Latest             = String "Latest"
  toJSON Recommended        = String "Recommended"
-  toJSON Prerelease         = String "Prerelease"
  toJSON (Base       pvp'') = String ("base-" <> prettyPVP pvp'')
  toJSON (UnknownTag x    ) = String (T.pack x)

@@ -62,7 +51,6 @@ instance FromJSON Tag where
  parseJSON = withText "Tag" $ \t -> case T.unpack t of
    "Latest"                             -> pure Latest
    "Recommended"                        -> pure Recommended
-    "Prerelease"                         -> pure Prerelease
    ('b' : 'a' : 's' : 'e' : '-' : ver') -> case pvp (T.pack ver') of
      Right x -> pure $ Base x
      Left  e -> fail . show $ e
@@ -194,18 +182,3 @@ 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
--- a/lib/GHCup/Types/Optics.hs
+++ b/lib/GHCup/Types/Optics.hs
@@ -1,14 +1,5 @@
 {-# LANGUAGE TemplateHaskell #-}

-{-|
-Module      : GHCup.Types.Optics
-Description : GHCup optics
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Types.Optics where

 import           GHCup.Types
--- a/lib/GHCup/Utils.hs
+++ b/lib/GHCup/Utils.hs
@@ -6,18 +6,7 @@
 {-# LANGUAGE TemplateHaskell       #-}
 {-# LANGUAGE ViewPatterns          #-}

-{-|
-Module      : GHCup.Utils
-Description : GHCup domain specific utilities
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX

-This module contains GHCup helpers specific to
-installation and introspection of files/versions etc.
-}
 module GHCup.Utils
  ( module GHCup.Utils.Dirs
  , module GHCup.Utils
@@ -35,9 +24,6 @@ import           GHCup.Utils.MegaParsec
 import           GHCup.Utils.Prelude
 import           GHCup.Utils.String.QQ

-#if !defined(TAR)
-import           Codec.Archive
-#endif
 import           Control.Applicative
 import           Control.Exception.Safe
 import           Control.Monad
@@ -48,9 +34,7 @@ import           Control.Monad.Logger
 import           Control.Monad.Reader
 import           Data.ByteString                ( ByteString )
 import           Data.Either
-import           Data.Foldable
 import           Data.List
-import           Data.List.Split
 import           Data.Maybe
 import           Data.String.Interpolate
 import           Data.Text                      ( Text )
@@ -58,7 +42,7 @@ import           Data.Versions
 import           Data.Word8
 import           GHC.IO.Exception
 import           HPath
-import           HPath.IO                hiding ( hideError )
+import           HPath.IO
 import           Haskus.Utils.Variant.Excepts
 import           Optics
 import           Prelude                 hiding ( abs
@@ -74,18 +58,12 @@ import           System.Posix.Files.ByteString  ( readSymbolicLink )
 import           Text.Regex.Posix
 import           URI.ByteString

-#if defined(TAR)
 import qualified Codec.Archive.Tar             as Tar
-#endif
 import qualified Codec.Compression.BZip        as BZip
 import qualified Codec.Compression.GZip        as GZip
 import qualified Codec.Compression.Lzma        as Lzma
 import qualified Data.ByteString               as B
-import qualified Data.ByteString.Lazy          as BL
 import qualified Data.Map.Strict               as Map
-#if !defined(TAR)
-import qualified Data.Text                     as T
-#endif
 import qualified Data.Text.Encoding            as E
 import qualified Text.Megaparsec               as MP

@@ -99,24 +77,20 @@ import qualified Text.Megaparsec               as MP


 -- | The symlink destination of a ghc tool.
-ghcLinkDestination :: (MonadReader Settings m, MonadThrow m, MonadIO m)
-                   => ByteString -- ^ the tool, such as 'ghc', 'haddock' etc.
+ghcLinkDestination :: ByteString -- ^ the tool, such as 'ghc', 'haddock' etc.
                   -> GHCTargetVersion
-                   -> m ByteString
-ghcLinkDestination tool ver = do
-  Settings {dirs = Dirs {..}} <- ask
-  t <- parseRel tool
-  ghcd <- ghcupGHCDir ver
-  pure (relativeSymlink binDir (ghcd </> [rel|bin|] </> t))
+                   -> ByteString
+ghcLinkDestination tool ver =
+  "../ghc/" <> E.encodeUtf8 (prettyTVer ver) <> "/bin/" <> tool


-- | Removes the minor GHC symlinks, e.g. ghc-8.6.5.
-rmMinorSymlinks :: (MonadReader Settings m, MonadIO m, MonadLogger m) => GHCTargetVersion -> m ()
+-- e.g. ghc-8.6.5
+rmMinorSymlinks :: (MonadIO m, MonadLogger m) => GHCTargetVersion -> m ()
 rmMinorSymlinks GHCTargetVersion {..} = do
-  Settings {dirs = Dirs {..}} <- ask
+  bindir <- liftIO $ ghcupBinDir

  files  <- liftIO $ findFiles'
-    binDir
+    bindir
    (  maybe mempty (\x -> MP.chunk (x <> "-")) _tvTarget
    *> parseUntil1 (MP.chunk $ prettyVer _tvVersion)
    *> (MP.chunk $ prettyVer _tvVersion)
@@ -124,41 +98,42 @@ rmMinorSymlinks GHCTargetVersion {..} = do
    )

  forM_ files $ \f -> do
-    let fullF = (binDir </> f)
+    let fullF = (bindir </> f)
    $(logDebug) [i|rm -f #{toFilePath fullF}|]
    liftIO $ hideError doesNotExistErrorType $ deleteFile fullF


-- | Removes the set ghc version for the given target, if any.
-rmPlain :: (MonadReader Settings m, MonadLogger m, MonadThrow m, MonadFail m, MonadIO m)
+-- Removes the set ghc version for the given target, if any.
+rmPlain :: (MonadLogger m, MonadThrow m, MonadFail m, MonadIO m)
  => Maybe Text -- ^ target
        -> Excepts '[NotInstalled] m ()
 rmPlain target = do
-  Settings {dirs = Dirs {..}} <- lift ask
-  mtv <- lift $ ghcSet target
+  mtv <- ghcSet target
  forM_ mtv $ \tv -> do
    files  <- liftE $ ghcToolFiles tv
+    bindir <- liftIO $ ghcupBinDir
    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 :: (MonadReader Settings m, MonadThrow m, MonadLogger m, MonadIO m)
+-- e.g. ghc-8.6
+rmMajorSymlinks :: (MonadThrow m, MonadLogger m, MonadIO m)
                => GHCTargetVersion
                -> m ()
 rmMajorSymlinks GHCTargetVersion {..} = do
-  Settings {dirs = Dirs {..}} <- ask
  (mj, mi) <- getMajorMinorV _tvVersion
  let v' = intToText mj <> "." <> intToText mi

+  bindir <- liftIO ghcupBinDir
+
  files  <- liftIO $ findFiles'
-    binDir
+    bindir
    (  maybe mempty (\x -> MP.chunk (x <> "-")) _tvTarget
    *> parseUntil1 (MP.chunk v')
    *> MP.chunk v'
@@ -166,7 +141,7 @@ rmMajorSymlinks GHCTargetVersion {..} = do
    )

  forM_ files $ \f -> do
-    let fullF = (binDir </> f)
+    let fullF = (bindir </> f)
    $(logDebug) [i|rm -f #{toFilePath fullF}|]
    liftIO $ hideError doesNotExistErrorType $ deleteFile fullF

@@ -178,128 +153,98 @@ rmMajorSymlinks GHCTargetVersion {..} = do
    -----------------------------------


-- | Whethe the given GHC versin is installed.
-ghcInstalled :: (MonadIO m, MonadReader Settings m, MonadThrow m) => GHCTargetVersion -> m Bool
+ghcInstalled :: GHCTargetVersion -> IO Bool
 ghcInstalled ver = do
  ghcdir <- ghcupGHCDir ver
-  liftIO $ doesDirectoryExist ghcdir
+  doesDirectoryExist ghcdir


-- | Whether the given GHC version is installed from source.
-ghcSrcInstalled :: (MonadIO m, MonadReader Settings m, MonadThrow m) => GHCTargetVersion -> m Bool
+ghcSrcInstalled :: GHCTargetVersion -> IO Bool
 ghcSrcInstalled ver = do
  ghcdir <- ghcupGHCDir ver
-  liftIO $ doesFileExist (ghcdir </> ghcUpSrcBuiltFile)
+  doesFileExist (ghcdir </> ghcUpSrcBuiltFile)


-- | Whether the given GHC version is set as the current.
-ghcSet :: (MonadReader Settings m, MonadThrow m, MonadIO m)
+ghcSet :: (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
-  Settings {dirs = Dirs {..}} <- ask
  ghc    <- parseRel $ E.encodeUtf8 (maybe "ghc" (<> "-ghc") mtarget)
-  let ghcBin = binDir </> ghc
+  ghcBin <- (</> ghc) <$> liftIO ghcupBinDir

  -- 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
-  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
+  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


 -- | Get all installed GHCs by reading ~/.ghcup/ghc/<dir>.
 -- If a dir cannot be parsed, returns left.
-getInstalledGHCs :: (MonadReader Settings m, MonadIO m) => m [Either (Path Rel) GHCTargetVersion]
+getInstalledGHCs :: MonadIO m => m [Either (Path Rel) GHCTargetVersion]
 getInstalledGHCs = do
-  ghcdir <- ghcupGHCBaseDir
+  ghcdir <- liftIO $ ghcupGHCBaseDir
  fs     <- liftIO $ hideErrorDef [NoSuchThing] [] $ getDirsFiles' ghcdir
  forM fs $ \f -> case parseGHCupGHCDir f of
    Right r -> pure $ Right r
    Left  _ -> pure $ Left f


-- | Get all installed cabals, by matching on @~\/.ghcup\/bin/cabal-*@.
-getInstalledCabals :: (MonadReader Settings m, MonadIO m, MonadCatch m)
-                   => m [Either (Path Rel) Version]
+getInstalledCabals :: IO [Either (Path Rel) Version]
 getInstalledCabals = do
-  Settings {dirs = Dirs {..}} <- ask
+  bindir <- liftIO $ ghcupBinDir
  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 -> nub $ Right x:vs) cs
+  pure $ maybe vs (\x -> Right x:vs) cs


-- | Whether the given cabal version is installed.
-cabalInstalled :: (MonadIO m, MonadReader Settings m, MonadCatch m) => Version -> m Bool
+cabalInstalled :: Version -> IO Bool
 cabalInstalled ver = do
  vers <- fmap rights $ getInstalledCabals
  pure $ elem ver $ vers


-- Return the currently set cabal version, if any.
-cabalSet :: (MonadReader Settings m, MonadIO m, MonadThrow m, MonadCatch m) => m (Maybe Version)
+cabalSet :: (MonadIO m, MonadThrow m) => m (Maybe Version)
 cabalSet = do
-  Settings {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'
-
-
+  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



@@ -308,7 +253,6 @@ 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)
@@ -323,7 +267,7 @@ matchMajor v' major' minor' = case getMajorMinorV v' of

 -- | Get the latest installed full GHC version that satisfies X.Y.
 -- This reads `ghcupGHCBaseDir`.
-getGHCForMajor :: (MonadReader Settings m, MonadIO m, MonadThrow m)
+getGHCForMajor :: (MonadIO m, MonadThrow m)
               => Int        -- ^ major version component
               -> Int        -- ^ minor version component
               -> Maybe Text -- ^ the target triple
@@ -366,67 +310,28 @@ getLatestGHCFor major' minor' dls = do
 unpackToDir :: (MonadLogger m, MonadIO m, MonadThrow m)
            => Path Abs       -- ^ destination dir
            -> Path Abs       -- ^ archive path
-            -> Excepts '[UnknownArchive
-#if !defined(TAR)
-                        , ArchiveResult
-#endif
-                        ] m ()
+            -> Excepts '[UnknownArchive] m ()
 unpackToDir dest av = do
  fp <- (decUTF8Safe . toFilePath) <$> basename av
  let dfp = decUTF8Safe . toFilePath $ dest
  lift $ $(logInfo) [i|Unpacking: #{fp} to #{dfp}|]
  fn <- toFilePath <$> basename av
-
-#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)
-
-      rf :: MonadIO m => Path Abs -> Excepts '[ArchiveResult] m BL.ByteString
-      rf = liftIO . readFile
-#endif
+  let untar = Tar.unpack (toFilePath dest) . Tar.read

  -- extract, depending on file extension
  if
-    | ".tar.gz" `B.isSuffixOf` fn -> liftE
-      (untar . GZip.decompress =<< rf av)
+    | ".tar.gz" `B.isSuffixOf` fn -> liftIO
+      (untar . GZip.decompress =<< readFile av)
    | ".tar.xz" `B.isSuffixOf` fn -> do
-      filecontents <- liftE $ rf av
+      filecontents <- liftIO $ readFile av
      let decompressed = Lzma.decompress filecontents
-      liftE $ untar decompressed
-    | ".tar.bz2" `B.isSuffixOf` fn ->
-      liftE (untar . BZip.decompress =<< rf av)
-    | ".tar" `B.isSuffixOf` fn -> liftE (untar =<< rf av)
+      liftIO $ untar decompressed
+    | ".tar.bz2" `B.isSuffixOf` fn -> liftIO
+      (untar . BZip.decompress =<< readFile av)
+    | ".tar" `B.isSuffixOf` fn -> liftIO (untar =<< readFile av)
    | 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
-
-


    ------------
@@ -483,17 +388,16 @@ urlBaseName :: MonadThrow m
 urlBaseName = parseRel . snd . B.breakEnd (== _slash) . urlDecode False


-- | Get tool files from @~\/.ghcup\/bin\/ghc\/\<ver\>\/bin\/\*@
-- while ignoring @*-\<ver\>@ symlinks and accounting for cross triple prefix.
+-- Get tool files from '~/.ghcup/bin/ghc/<ver>/bin/*'
+-- while ignoring *-<ver> symlinks and accounting for cross triple prefix.
 --
 -- Returns unversioned relative files, e.g.:
--
--   - @["hsc2hs","haddock","hpc","runhaskell","ghc","ghc-pkg","ghci","runghc","hp2ps"]@
-ghcToolFiles :: (MonadReader Settings m, MonadThrow m, MonadFail m, MonadIO m)
+--   ["hsc2hs","haddock","hpc","runhaskell","ghc","ghc-pkg","ghci","runghc","hp2ps"]
+ghcToolFiles :: (MonadThrow m, MonadFail m, MonadIO m)
             => GHCTargetVersion
             -> Excepts '[NotInstalled] m [Path Rel]
 ghcToolFiles ver = do
-  ghcdir <- lift $ ghcupGHCDir ver
+  ghcdir <- liftIO $ ghcupGHCDir ver
  let bindir = ghcdir </> [rel|bin|]

  -- fail if ghc is not installed
@@ -513,44 +417,28 @@ ghcToolFiles ver = do
                   ([s|^([a-zA-Z0-9_-]*[a-zA-Z0-9_]-)?ghc$|] :: ByteString)
    )

-  let ghcbinPath = bindir </> ghcbin
-  ghcIsHadrian    <- liftIO $ isHadrian ghcbinPath
-  onlyUnversioned <- if ghcIsHadrian
-    then pure id
-    else do
-      (Just symver) <-
-        (B.stripPrefix (toFilePath ghcbin <> "-") . takeFileName)
-          <$> (liftIO $ readSymbolicLink $ toFilePath ghcbinPath)
-      when (B.null symver)
-           (throwIO $ userError $ "Fatal: ghc symlink target is broken")
-      pure $ filter (\x -> not $ symver `B.isSuffixOf` toFilePath x)
+  (Just symver) <-
+    (B.stripPrefix (toFilePath ghcbin <> "-") . takeFileName)
+      <$> (liftIO $ readSymbolicLink $ toFilePath (bindir </> ghcbin))
+  when (B.null symver)
+       (throwIO $ userError $ "Fatal: ghc symlink target is broken")

-  pure $ onlyUnversioned files
- where
-    -- GHC is moving some builds to Hadrian for bindists,
-    -- which doesn't create versioned binaries.
-    -- https://gitlab.haskell.org/haskell/ghcup-hs/issues/31
-  isHadrian :: Path Abs -- ^ ghcbin path
-            -> IO Bool
-  isHadrian = fmap (/= SymbolicLink) . getFileType
+  pure . filter (\x -> not $ symver `B.isSuffixOf` toFilePath x) $ files


-- | This file, when residing in @~\/.ghcup\/ghc\/\<ver\>\/@ signals that
+-- | This file, when residing in ~/.ghcup/ghc/<ver>/ signals that
 -- this GHC was built from source. It contains the build config.
 ghcUpSrcBuiltFile :: Path Rel
 ghcUpSrcBuiltFile = [rel|.ghcup_src_built|]


 -- | Calls gmake if it exists in PATH, otherwise make.
-make :: (MonadThrow m, MonadIO m, MonadReader Settings m)
-     => [ByteString]
-     -> Maybe (Path Abs)
-     -> m (Either ProcessError ())
+make :: [ByteString] -> Maybe (Path Abs) -> IO (Either ProcessError ())
 make args workdir = do
-  spaths    <- catMaybes . fmap parseAbs <$> (liftIO getSearchPath)
-  has_gmake <- isJust <$> (liftIO $ searchPath spaths [rel|gmake|])
+  spaths    <- catMaybes . fmap parseAbs <$> getSearchPath
+  has_gmake <- isJust <$> searchPath spaths [rel|gmake|]
  let mymake = if has_gmake then "gmake" else "make"
-  execLogged mymake True args workdir Nothing
+  execLogged mymake True args [rel|ghc-make|] workdir Nothing


 -- | Try to apply patches in order. Fails with 'PatchFailed'
@@ -573,7 +461,6 @@ applyPatches pdir ddir = do
      !? PatchFailed


-- | https://gitlab.haskell.org/ghc/ghc/-/issues/17353
 darwinNotarization :: Platform -> Path Abs -> IO (Either ProcessError ())
 darwinNotarization Darwin path = exec
  "xattr"
@@ -602,18 +489,24 @@ runBuildAction :: (Show (V e), MonadReader Settings m, MonadIO m, MonadMask m)
               -> Excepts '[BuildFailed] m a
 runBuildAction bdir instdir action = do
  Settings {..} <- lift ask
-  let exAction = do
+  v <- flip
+      onException
+      (do
        forM_ instdir $ \dir ->
          liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive dir
        when (keepDirs == Never)
          $ liftIO
          $ hideError doesNotExistErrorType
          $ deleteDirRecursive bdir
-  v <-
-    flip onException exAction
+      )
    $ catchAllE
        (\es -> do
-          exAction
+          forM_ instdir $ \dir ->
+            liftIO $ hideError doesNotExistErrorType $ deleteDirRecursive dir
+          when (keepDirs == Never)
+            $ liftIO
+            $ hideError doesNotExistErrorType
+            $ deleteDirRecursive bdir
          throwE (BuildFailed bdir es)
        )
    $ action
--- a/lib/GHCup/Utils/Bash.hs
+++ b/lib/GHCup/Utils/Bash.hs
@@ -0,0 +1,69 @@
+module GHCup.Utils.Bash
+  ( findAssignment
+  , equalsAssignmentWith
+  , getRValue
+  , getAssignmentValueFor
+  )
+where
+
+import           Control.Monad
+import           Data.ByteString.UTF8           ( toString )
+import           Data.List
+import           Data.Maybe
+import           HPath
+import           HPath.IO
+import           Language.Bash.Parse
+import           Language.Bash.Syntax
+import           Language.Bash.Word
+import           Prelude                 hiding ( readFile )
+
+import qualified Data.ByteString.Lazy.UTF8     as UTF8
+
+
+extractAssignments :: List -> [Assign]
+extractAssignments (List stms) = join $ fmap getAssign $ getCommands stms
+ where
+  getCommands :: [Statement] -> [Command]
+  getCommands = join . fmap commands . catMaybes . fmap findPipes
+   where
+    findPipes (Statement (Last p@(Pipeline{})) Sequential) = Just p
+    findPipes _ = Nothing
+
+  getAssign :: Command -> [Assign]
+  getAssign (Command (SimpleCommand ass _) _) = ass
+  getAssign _ = []
+
+
+-- | Find an assignment matching the predicate in the given file.
+findAssignment :: Path b -> (Assign -> Bool) -> IO (Maybe Assign)
+findAssignment p predicate = do
+  fileContents <- readFile p
+  -- TODO: this should accept bytestring:
+  --       https://github.com/knrafto/language-bash/issues/37
+  case parse (toString . toFilePath $ p) (UTF8.toString fileContents) of
+    Left  e -> fail $ show e
+    Right l -> pure $ find predicate (extractAssignments $ l)
+
+
+-- | Check that the assignment is of the form Foo= ignoring the
+-- right hand-side.
+equalsAssignmentWith :: String -> Assign -> Bool
+equalsAssignmentWith n ass = case ass of
+  (Assign (Parameter name' Nothing) Equals _) -> n == name'
+  _ -> False
+
+
+-- | This pretty-prints the right hand of an Equals assignment, removing
+-- quotations. No evaluation is performed.
+getRValue :: Assign -> Maybe String
+getRValue ass = case ass of
+  (Assign (Parameter _ _) Equals (RValue w)) -> Just $ unquote w
+  _ -> Nothing
+
+
+-- | Given a bash assignment such as Foo="Bar" in the given file,
+-- will return "Bar" (without quotations).
+getAssignmentValueFor :: Path b -> String -> IO (Maybe String)
+getAssignmentValueFor p n = do
+  mass <- findAssignment p (equalsAssignmentWith n)
+  pure (mass >>= getRValue)
--- a/lib/GHCup/Utils/Dirs.hs
+++ b/lib/GHCup/Utils/Dirs.hs
@@ -1,27 +1,8 @@
 {-# LANGUAGE OverloadedStrings     #-}
-{-# LANGUAGE FlexibleContexts      #-}
 {-# LANGUAGE QuasiQuotes           #-}
 {-# LANGUAGE ViewPatterns          #-}

-{-|
-Module      : GHCup.Utils.Dirs
-Description : Definition of GHCup directories
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
-module GHCup.Utils.Dirs
-  ( getDirs
-  , ghcupGHCBaseDir
-  , ghcupGHCDir
-  , parseGHCupGHCDir
-  , mkGhcupTmpDir
-  , withGHCupTmpDir
-  , relativeSymlink
-  )
-where
+module GHCup.Utils.Dirs where


 import           GHCup.Types
@@ -34,7 +15,6 @@ import           Control.Exception.Safe
 import           Control.Monad
 import           Control.Monad.Reader
 import           Control.Monad.Trans.Resource
-import           Data.ByteString                ( ByteString )
 import           Data.Maybe
 import           HPath
 import           HPath.IO
@@ -46,7 +26,6 @@ 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.UTF8          as UTF8
@@ -57,117 +36,33 @@ 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|])
-
-
-- | 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
-  pure Dirs { .. }
-
-
-
    -------------------------
    --[ 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 :: (MonadReader Settings m) => m (Path Abs)
-ghcupGHCBaseDir = do
-  Settings {..} <- ask
-  pure (baseDir dirs </> [rel|ghc|])
+ghcupGHCBaseDir :: IO (Path Abs)
+ghcupGHCBaseDir = ghcupBaseDir <&> (</> [rel|ghc|])


 -- | Gets '~/.ghcup/ghc/<ghcupGHCDir>'.
 -- The dir may be of the form
 --   * armv7-unknown-linux-gnueabihf-8.8.3
 --   * 8.8.4
-ghcupGHCDir :: (MonadReader Settings m, MonadThrow m)
-            => GHCTargetVersion
-            -> m (Path Abs)
+ghcupGHCDir :: GHCTargetVersion -> IO (Path Abs)
 ghcupGHCDir ver = do
-  ghcbasedir    <- ghcupGHCBaseDir
-  verdir        <- parseRel $ E.encodeUtf8 (prettyTVer ver)
+  ghcbasedir <- ghcupGHCBaseDir
+  verdir     <- parseRel $ E.encodeUtf8 (prettyTVer ver)
  pure (ghcbasedir </> verdir)


@@ -178,6 +73,16 @@ 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"
@@ -189,8 +94,6 @@ withGHCupTmpDir :: (MonadResource m, MonadThrow m, MonadIO m) => m (Path Abs)
 withGHCupTmpDir = snd <$> allocate mkGhcupTmpDir deleteDirRecursive


-
-
    --------------
    --[ Others ]--
    --------------
@@ -204,23 +107,3 @@ 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))
-
-
-
-
--- a/lib/GHCup/Utils/File.hs
+++ b/lib/GHCup/Utils/File.hs
@@ -1,55 +1,41 @@
 {-# LANGUAGE QuasiQuotes       #-}
 {-# LANGUAGE OverloadedStrings #-}
-{-# LANGUAGE FlexibleContexts  #-}
 {-# LANGUAGE TemplateHaskell   #-}
-{-# LANGUAGE ViewPatterns      #-}

-{-|
-Module      : GHCup.Utils.File
-Description : File and unix APIs
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-
-This module handles file and executable handling.
-Some of these functions use sophisticated logging.
-}
 module GHCup.Utils.File where

+import           GHCup.Utils.Dirs
 import           GHCup.Utils.Prelude
-import           GHCup.Types

 import           Control.Concurrent
-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 )
+import           Data.ByteString.Unsafe         ( unsafeUseAsCStringLen )
+import           Data.Char
 import           Data.Foldable
 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
+import           GHC.Foreign                    ( peekCStringLen )
+import           GHC.IO.Encoding                ( getLocaleEncoding )
 import           GHC.IO.Exception
 import           HPath
-import           HPath.IO                hiding ( hideError )
-import           Optics                  hiding ((<|), (|>))
+import           HPath.IO
+import           Optics
+import           Streamly
+import           Streamly.External.ByteString
+import           Streamly.External.ByteString.Lazy
 import           System.Console.Pretty
 import           System.Console.Regions
+import           System.IO
 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 )
@@ -59,19 +45,38 @@ import           Text.Regex.Posix


 import qualified Control.Exception             as EX
-import qualified Data.Sequence                 as Sq
 import qualified Data.Text                     as T
 import qualified Data.Text.Encoding            as E
 import qualified System.Posix.Process.ByteString
                                               as SPPB
 import           Streamly.External.Posix.DirStream
+import qualified Streamly.Internal.Memory.ArrayStream
+                                               as AS
+import qualified Streamly.FileSystem.Handle    as FH
+import qualified Streamly.Internal.Data.Unfold as SU
 import qualified Streamly.Prelude              as S
 import qualified Text.Megaparsec               as MP
 import qualified Data.ByteString               as BS
+import qualified Data.ByteString.Lazy          as L
 import qualified "unix-bytestring" System.Posix.IO.ByteString
                                               as SPIB


+
+-- | Bool signals whether the regions should be cleaned.
+data StopThread = StopThread Bool
+  deriving Show
+
+instance Exception StopThread
+
+
+data ProcessError = NonZeroExit Int ByteString [ByteString]
+                  | PTerminated ByteString [ByteString]
+                  | PStopped ByteString [ByteString]
+                  | NoSuchPid ByteString [ByteString]
+                  deriving Show
+
+
 data CapturedProcess = CapturedProcess
  { _exitCode :: ExitCode
  , _stdOut   :: ByteString
@@ -82,6 +87,25 @@ data CapturedProcess = CapturedProcess
 makeLenses ''CapturedProcess


+readFd :: Fd -> IO L.ByteString
+readFd fd = do
+  handle' <- fdToHandle fd
+  fromChunksIO $ (S.unfold (SU.finallyIO hClose FH.readChunks) handle')
+
+
+-- | Read the lines of a file into a stream. The stream holds
+-- a file handle as a resource and will close it once the stream
+-- terminates (either through exception or because it's drained).
+readFileLines :: Path b -> IO (SerialT IO ByteString)
+readFileLines p = do
+  stream <- readFileStream p
+  pure
+    . (fmap fromArray)
+    . AS.splitOn (fromIntegral $ ord '\n')
+    . (fmap toArray)
+    $ stream
+
+
 -- | Find the given executable by searching all *absolute* PATH components.
 -- Relative paths in PATH are ignored.
 --
@@ -109,98 +133,110 @@ executeOut path args chdir = captureOutStreams $ do
  SPPB.executeFile (toFilePath path) True args Nothing


-execLogged :: (MonadReader Settings m, MonadIO m, MonadThrow m)
-           => ByteString       -- ^ thing to execute
+execLogged :: ByteString       -- ^ thing to execute
           -> Bool             -- ^ whether to search PATH for the thing
           -> [ByteString]     -- ^ args for the thing
+           -> Path Rel         -- ^ log filename
           -> Maybe (Path Abs) -- ^ optionally chdir into this
           -> Maybe [(ByteString, ByteString)] -- ^ optional environment
-           -> m (Either ProcessError ())
-execLogged exe spath args chdir env = do
-  Settings {dirs = Dirs {..}, ..} <- ask
-  logfile       <- (logsDir </>) <$> parseRel (lfile <> ".log")
-  liftIO $ bracket (createFile (toFilePath logfile) newFilePerms)
-                   closeFd
-                   (action verbose execCb)
+           -> IO (Either ProcessError ())
+execLogged exe spath args lfile chdir env = do
+  ldir    <- ghcupLogsDir
+  logfile <- (ldir </>) <$> parseRel (toFilePath lfile <> ".log")
+  bracket (createFile (toFilePath logfile) newFilePerms) closeFd action
 where
-  lfile = fromMaybe exe $ BS.stripPrefix "./" exe
-
-  action verbose cb fd = do
+  action fd = do
    actionWithPipes $ \(stdoutRead, stdoutWrite) -> do
-      -- start the thread that logs to stdout
-      pState  <- newEmptyMVar
-      done    <- newEmptyMVar
-      liftIO $ HPath.IO.writeFile [HPath.abs|/home/jule/git/ghcup-hs/cb.log|] Nothing "execLogged1"
-      void
-        $ forkIO
+      -- start the thread that logs to stdout in a region
+      done <- newEmptyMVar
+      tid  <-
+        forkIO
+        $ EX.handle (\(_ :: StopThread) -> pure ())
        $ EX.handle (\(_ :: IOException) -> pure ())
-        $ flip EX.finally (putMVar done ())
-        $ (do
-            liftIO $ HPath.IO.writeFile [HPath.abs|/home/jule/git/ghcup-hs/cb.log|] Nothing "execLogged"
-            cb verbose fd stdoutRead pState lfile)
+        $ flip finally (putMVar done ())
+        $ printToRegion fd stdoutRead 6

-      -- fork the subprocess
+      -- fork our subprocess
      pid <- SPPB.forkProcess $ do
        void $ dupTo stdoutWrite stdOutput
        void $ dupTo stdoutWrite stdError
-        closeFd stdoutRead
        closeFd stdoutWrite
+        closeFd stdoutRead

        -- execute the action
        maybe (pure ()) (changeWorkingDirectory . toFilePath) chdir
-        void $ SPPB.executeFile exe spath args env
-
-      putMVar pState (PRunning pid)
+        SPPB.executeFile exe spath args env

      closeFd stdoutWrite

      -- wait for the subprocess to finish
-      e <- toProcessError exe args <$!> SPPB.getProcessStatus True True pid
-      void $ swapMVar pState (PExited e)
+      e <- SPPB.getProcessStatus True True pid >>= \case
+        i@(Just (SPPB.Exited _)) -> pure $ toProcessError exe args i
+        i                        -> pure $ toProcessError exe args i
+
+      -- make sure the logging thread stops
+      case e of
+        Left  _ -> EX.throwTo tid (StopThread False)
+        Right _ -> EX.throwTo tid (StopThread True)
+      takeMVar done

-      void $ race (takeMVar done) (threadDelay (1000000 * 3))
      closeFd stdoutRead
-
      pure e

+  -- Reads fdIn and logs the output in a continous scrolling area
+  -- of 'size' terminal lines. Also writes to a log file.
+  printToRegion fileFd fdIn size = do
+    ref <- newIORef ([] :: [ByteString])
+    displayConsoleRegions $ do
+      rs <- sequence . replicate size . openConsoleRegion $ Linear
+      flip finally (readTilEOF (lineAction ref rs) fdIn) -- make sure the last few lines don't get cut off
+        $ handle
+            (\(StopThread b) -> do
+              when b (forM_ rs closeConsoleRegion)
+              EX.throw (StopThread b)
+            )
+        $ do
+            hideError eofErrorType $ readTilEOF (lineAction ref rs) fdIn
+            -- wait for explicit stop from the parent to signal what cleanup to run
+            forever (threadDelay 5000)

-readLineTilEOF :: MonadIO m => (ByteString -> m a) -> Fd -> m ()
-readLineTilEOF ~action' fd' = go mempty
- where
-  go bs' = do
-    (bs, rest, eof) <- readLine fd' bs'
-    if eof
-       then liftIO $ ioError (mkIOError eofErrorType "" Nothing Nothing)
-       else (void $ action' bs) >> go rest
+   where
+    -- action to perform line by line
+    lineAction ref rs bs' = do
+      modifyIORef' ref (swapRegs bs')
+      regs <- readIORef ref
+      void $ SPIB.fdWrite fileFd (bs' <> "\n")
+      forM (zip regs rs) $ \(bs, r) -> do
+        setConsoleRegion r $ do
+          w <- consoleWidth
+          return
+            . T.pack
+            . color Blue
+            . T.unpack
+            . decUTF8Safe
+            . trim w
+            . (\b -> "[ " <> toFilePath lfile <> " ] " <> b)
+            $ bs

+    swapRegs bs regs | length regs < size = regs ++ [bs]
+                     | otherwise          = tail regs ++ [bs]

-- Consecutively read from Fd in 512 chunks until we hit
-- newline or EOF.
-readLine :: MonadIO m
-         => Fd          -- ^ input file descriptor
-         -> ByteString  -- ^ rest buffer (read across newline)
-         -> m (ByteString, ByteString, Bool) -- ^ (full line, rest, eof)
-readLine fd = \inBs -> go inBs
- where
-  go inBs = do
-    -- if buffer is not empty, process it first
-    mbs <- if BS.length inBs == 0
-             -- otherwise attempt read
-             then liftIO
-                  $ handleIO (\e -> if isEOFError e then pure Nothing else ioError e)
-                  $ fmap Just
-                  $ SPIB.fdRead fd 512
-             else pure $ Just inBs
-    case mbs of
-      Nothing -> pure ("", "", True)
-      Just bs -> do
-        -- split on newline
-        let (line, rest) = BS.span (/= _lf) bs
-        if
-          | BS.length rest /= 0 -> pure (line, BS.tail rest, False)
-          -- if rest is empty, then there was no newline, process further
-          | otherwise           -> (\(l, r, b) -> (line <> l, r, b)) <$!> go mempty
+    -- trim output line to terminal width
+    trim w bs | BS.length bs > w && w > 5 = BS.take (w - 4) bs <> "..."
+              | otherwise                 = bs

+    -- read an entire line from the file descriptor (removes the newline char)
+    readLine fd' = do
+      bs <- SPIB.fdRead fd' 1
+      if
+        | bs == "\n" -> pure ""
+        | bs == ""   -> pure ""
+        | otherwise  -> fmap (bs <>) $ readLine fd'
+
+    readTilEOF action' fd' = do
+      bs <- readLine fd'
+      void $ action' bs
+      readTilEOF action' fd'


 -- | Capture the stdout and stderr of the given action, which
@@ -237,12 +273,13 @@ captureOutStreams action = do
      done   <- newEmptyMVar
      _      <-
        forkIO
+        $ EX.handle (\(_ :: StopThread) -> pure ())
        $ EX.handle (\(_ :: IOException) -> pure ())
-        $ flip EX.finally (putMVar done ())
+        $ flip finally (putMVar done ())
        $ writeStds parentStdoutRead parentStderrRead refOut refErr

      status <- SPPB.getProcessStatus True True pid
-      void $ race (takeMVar done) (threadDelay (1000000 * 3))
+      takeMVar done

      case status of
        -- readFd will take care of closing the fd
@@ -262,13 +299,13 @@ captureOutStreams action = do
    void
      $ forkIO
      $ hideError eofErrorType
-      $ flip EX.finally (putMVar doneOut ())
+      $ flip finally (putMVar doneOut ())
      $ readTilEOF (\x -> modifyIORef' rout (<> x)) pout
    doneErr <- newEmptyMVar
    void
      $ forkIO
      $ hideError eofErrorType
-      $ flip EX.finally (putMVar doneErr ())
+      $ flip finally (putMVar doneErr ())
      $ readTilEOF (\x -> modifyIORef' rerr (<> x)) perr
    takeMVar doneOut
    takeMVar doneErr
@@ -314,13 +351,21 @@ toProcessError :: ByteString
               -> Maybe ProcessStatus
               -> Either ProcessError ()
 toProcessError exe args mps = case mps of
-  Just (SPPB.Exited (ExitFailure xi)) -> Left $ NonZeroExit xi exe args
+  Just (SPPB.Exited (ExitFailure i)) -> Left $ NonZeroExit i exe args
  Just (SPPB.Exited ExitSuccess    ) -> Right ()
  Just (Terminated _ _             ) -> Left $ PTerminated exe args
  Just (Stopped _                  ) -> Left $ PStopped exe args
  Nothing                            -> Left $ NoSuchPid exe args


+-- | Convert the String to a ByteString with the current
+-- system encoding.
+unsafePathToString :: Path b -> IO FilePath
+unsafePathToString p = do
+  enc <- getLocaleEncoding
+  unsafeUseAsCStringLen (toFilePath p) (peekCStringLen enc)
+
+
 -- | Search for a file in the search paths.
 --
 -- Catches `PermissionDenied` and `NoSuchThing` and returns `Nothing`.
@@ -364,97 +409,3 @@ 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_777 :: (MonadLogger m, MonadIO m) => Path a -> m ()
-chmod_777 (toFilePath -> fp) = do
-  let exe_mode =
-          newFilePerms
-            `unionFileModes` ownerExecuteMode
-            `unionFileModes` groupExecuteMode
-            `unionFileModes` otherExecuteMode
-  $(logDebug) [i|chmod 777 #{fp}|]
-  liftIO $ setFileMode fp exe_mode
-
-
-- | The default callback for logging/printing on 'execLogged'.
-defExecCb :: ExecCb
-defExecCb verbose fd stdoutRead pState lfile = if verbose
-      then tee fd stdoutRead
-      else printToRegion fd stdoutRead 6
- where
-  tee :: Fd -> Fd -> IO ()
-  tee fileFd fdIn = readLineTilEOF lineAction fdIn
-
-   where
-    lineAction :: ByteString -> IO ()
-    lineAction bs' = do
-      void $ SPIB.fdWrite fileFd (bs' <> "\n")
-      void $ SPIB.fdWrite stdOutput (bs' <> "\n")
-
-  -- Reads fdIn and logs the output in a continous scrolling area
-  -- of 'size' terminal lines. Also writes to a log file.
-  printToRegion :: Fd -> Fd -> Int -> IO ()
-  printToRegion fileFd fdIn size = do
-    void $ displayConsoleRegions $ do
-      rs <-
-        liftIO
-        . fmap Sq.fromList
-        . sequence
-        . replicate size
-        . openConsoleRegion
-        $ Linear
-      flip runStateT mempty
-        $ handle
-            (\(ex :: SomeException) -> do
-              let closeEventually = readMVar pState >>= \case
-                    PExited (Right _) -> forM_ rs (liftIO . closeConsoleRegion)
-                    _ -> threadDelay 500 >> closeEventually
-              void $ liftIO $ race closeEventually (threadDelay (1000000 * 3))
-              throw ex
-            )
-        $ readLineTilEOF (lineAction rs) fdIn
-
-   where
-    -- action to perform line by line
-    -- TODO: do this with vty for efficiency
-    lineAction :: (MonadMask m, MonadIO m)
-               => Seq ConsoleRegion
-               -> ByteString
-               -> StateT (Seq ByteString) m ()
-    lineAction rs = \bs' -> do
-      void $ liftIO $ SPIB.fdWrite fileFd (bs' <> "\n")
-      modify (swapRegs bs')
-      regs <- get
-      liftIO $ forM_ (Sq.zip regs rs) $ \(bs, r) -> setConsoleRegion r $ do
-        w <- consoleWidth
-        return
-          . T.pack
-          . color Blue
-          . T.unpack
-          . decUTF8Safe
-          . trim w
-          . (\b -> "[ " <> lfile <> " ] " <> b)
-          $ bs
-
-    swapRegs :: a -> Seq a -> Seq a
-    swapRegs bs = \regs -> if
-      | Sq.length regs < size -> regs |> bs
-      | otherwise             -> Sq.drop 1 regs |> bs
-
-    -- trim output line to terminal width
-    trim :: Int -> ByteString -> ByteString
-    trim w = \bs -> if
-      | BS.length bs > w && w > 5 -> BS.take (w - 4) bs <> "..."
-      | otherwise                 -> bs
-
-
--- a/lib/GHCup/Utils/Logger.hs
+++ b/lib/GHCup/Utils/Logger.hs
@@ -1,24 +1,10 @@
 {-# LANGUAGE QuasiQuotes           #-}
-{-# LANGUAGE FlexibleContexts      #-}

-{-|
-Module      : GHCup.Utils.Logger
-Description : logger definition
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-
-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
@@ -64,12 +50,11 @@ myLoggerT LoggerConfig {..} loggingt = runLoggingT loggingt mylogger
    rawOutter outr


-initGHCupFileLogging :: (MonadIO m, MonadReader Settings m) => Path Rel -> m (Path Abs)
+initGHCupFileLogging :: Path Rel -> IO (Path Abs)
 initGHCupFileLogging context = do
-  Settings {dirs = Dirs {..}} <- ask
-  let logfile = logsDir </> context
-  liftIO $ do
-    createDirRecursive newDirPerms logsDir
-    hideError doesNotExistErrorType $ deleteFile logfile
-    createRegularFile newFilePerms logfile
-    pure logfile
+  logs <- ghcupLogsDir
+  let logfile = logs </> context
+  createDirIfMissing newDirPerms logs
+  hideError doesNotExistErrorType $ deleteFile logfile
+  createRegularFile newFilePerms logfile
+  pure logfile
--- a/lib/GHCup/Utils/MegaParsec.hs
+++ b/lib/GHCup/Utils/MegaParsec.hs
@@ -1,15 +1,6 @@
 {-# LANGUAGE CPP                  #-}
 {-# LANGUAGE OverloadedStrings    #-}

-{-|
-Module      : GHCup.Utils.MegaParsec
-Description : MegaParsec utilities
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Utils.MegaParsec where

 import           GHCup.Types
--- a/lib/GHCup/Utils/Prelude.hs
+++ b/lib/GHCup/Utils/Prelude.hs
@@ -8,17 +8,6 @@
 {-# LANGUAGE TypeFamilies        #-}
 {-# LANGUAGE TypeOperators       #-}

-{-|
-Module      : GHCup.Utils.Prelude
-Description : MegaParsec utilities
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-
-GHCup specific prelude. Lots of Excepts functionality.
-}
 module GHCup.Utils.Prelude where

 import           Control.Applicative
@@ -176,11 +165,6 @@ liftIOException errType ex =
    . lift


-- | Uses safe-exceptions.
-hideError :: (MonadIO m, MonadCatch m) => IOErrorType -> m () -> m ()
-hideError err = handleIO (\e -> if err == ioeGetErrorType e then pure () else liftIO . ioError $ e)
-
-
 hideErrorDef :: [IOErrorType] -> a -> IO a -> IO a
 hideErrorDef errs def =
  handleIO (\e -> if ioeGetErrorType e `elem` errs then pure def else ioError e)
--- a/lib/GHCup/Utils/String/QQ.hs
+++ b/lib/GHCup/Utils/String/QQ.hs
@@ -1,35 +1,25 @@
 {-# LANGUAGE TemplateHaskell #-}

-{-|
-Module      : GHCup.Utils.String.QQ
-Description : String quasi quoters
-Copyright   : (c) Audrey Tang <audreyt@audreyt.org> 2019, Julian Ospald <hasufell@posteo.de> 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-
-QuasiQuoter for non-interpolated strings, texts and bytestrings.
-
-The "s" quoter contains a multi-line string with no interpolation at all,
-except that the leading newline is trimmed and carriage returns stripped.
-
-@
-{-\# LANGUAGE QuasiQuotes #-}
-import Data.Text (Text)
-import Data.String.QQ
-foo :: Text -- "String", "ByteString" etc also works
-foo = [s|
-Well here is a
-    multi-line string!
-|]
-@
-
-Any instance of the IsString type is permitted.
-
-(For GHC versions 6, write "[$s||]" instead of "[s||]".)
-
-}
+-- | QuasiQuoter for non-interpolated strings, texts and bytestrings.
+--
+-- The "s" quoter contains a multi-line string with no interpolation at all,
+-- except that the leading newline is trimmed and carriage returns stripped.
+--
+-- @
+-- {-\# LANGUAGE QuasiQuotes #-}
+-- import Data.Text (Text)
+-- import Data.String.QQ
+-- foo :: Text -- "String", "ByteString" etc also works
+-- foo = [s|
+-- Well here is a
+--     multi-line string!
+-- |]
+-- @
+--
+-- Any instance of the IsString type is permitted.
+--
+-- (For GHC versions 6, write "[$s||]" instead of "[s||]".)
+--
 module GHCup.Utils.String.QQ
  ( s
  )
--- a/lib/GHCup/Utils/Version/QQ.hs
+++ b/lib/GHCup/Utils/Version/QQ.hs
@@ -7,15 +7,6 @@
 {-# LANGUAGE TemplateHaskell    #-}


-{-|
-Module      : GHCup.Utils.Version.QQ
-Description : Version quasi-quoters
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Utils.Version.QQ where

 import           Data.Data
@@ -51,6 +42,7 @@ deriving instance Data VUnit

 #if !MIN_VERSION_base(4,13,0)
 deriving instance Lift (NonEmpty Word)
+instance Lift Text
 #endif

 qq :: (Text -> Q Exp) -> QuasiQuoter
--- a/lib/GHCup/Version.hs
+++ b/lib/GHCup/Version.hs
@@ -1,15 +1,6 @@
 {-# LANGUAGE QuasiQuotes       #-}


-{-|
-Module      : GHCup.Version
-Description : Static version information
-Copyright   : (c) Julian Ospald, 2020
-License     : LGPL-3.0
-Maintainer  : hasufell@hasufell.de
-Stability   : experimental
-Portability : POSIX
-}
 module GHCup.Version where

 import           GHCup.Utils.Version.QQ
@@ -20,14 +11,12 @@ import           URI.ByteString.QQ

 import qualified Data.Text                     as T

-- | This reflects the API version of the YAML.
+-- | This reflects the API version of the JSON.
 ghcupURL :: URI
-ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.2.yaml|]
+ghcupURL = [uri|https://www.haskell.org/ghcup/data/ghcup-0.0.2.json|]

-- | The current ghcup version.
 ghcUpVer :: PVP
-ghcUpVer = [pver|0.1.10|]
+ghcUpVer = [pver|0.1.5|]

-- | ghcup version as numeric string.
 numericVer :: String
 numericVer = T.unpack . prettyPVP $ ghcUpVer
--- a/www/ghcup.css
+++ b/www/ghcup.css
@@ -101,7 +101,6 @@ body#idx p.other-help {

 .instructions div.command-button {
 	display: flex;
-	align-items: center;
 }

 .instructions div.command-button button {
@@ -112,7 +111,7 @@ body#idx p.other-help {
 	border-style: solid;
 	border-radius: 3px;

-    margin-left: 0.5rem;
+    margin-left: 1rem;
    margin-right: auto;
 	margin-top: 25px;
 	margin-bottom: 25px;
@@ -135,21 +134,20 @@ hr {
 #platform-instructions-linux > div > pre,
 #platform-instructions-mac > div > pre,
 #platform-instructions-freebsd > div > pre,
-#platform-instructions-win32 > div > pre,
-#platform-instructions-win64 > div > pre,
+#platform-instructions-win32 > pre,
+#platform-instructions-win64 > pre,
 #platform-instructions-default > div > div > pre,
 #platform-instructions-unknown > div > div > pre {
    background-color: #515151;
    color: white;
    margin-left: auto;
+    margin-right: auto;
    padding-top: 1rem;
    padding-bottom: 1rem;
    padding-right: 1rem;
    text-align: center;
    border-radius: 3px;
    box-shadow: inset 0px 0px 20px 0px #333333;
-	font-size: 0.6em;
-	width: 40rem;
 }

 #platform-instructions-win32 a.windows-download,
--- a/www/index.html
+++ b/www/index.html
@@ -46,9 +46,6 @@
        <p>
          To install Haskell, follow the instructions on
          <a class="windows-download" href="https://www.haskell.org/platform/#windows">Haskell Platform</a>
-		<p>If you're a Windows Subsystem for Linux user run the following in your terminal, then follow the onscreen instructions to install Haskell.
-		</p>
-		<div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
        </p>
        <p class="other-help">You appear to be running Windows 32-bit. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
      </div>
@@ -58,9 +55,6 @@
          To install Haskell, follow the instructions on
          <a class="windows-download" href="https://www.haskell.org/platform/#windows">Haskell Platform</a>
        </p>
-		<p>If you're a Windows Subsystem for Linux user run the following in your terminal, then follow the onscreen instructions to install Haskell.
-		</p>
-		<div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
        <p class="other-help">You appear to be running Windows 64-bit. If not, <a class="default-platform-button" href="#">display all supported installers</a>.</p>
      </div>

@@ -83,7 +77,7 @@

        <!-- duplicate the default cross-platform instructions -->
        <div>
-          <p>If you are running Linux, macOS, FreeBSD or Windows Subsystem for Linux, run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
+          <p>If you are running Linux, macOS or FreeBSD,<br/>run the following in your terminal (as a user other than root), then follow the onscreen instructions.</p>
 		  <div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
          <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.</p>
        </div>
@@ -101,7 +95,7 @@

      <div id="platform-instructions-default" class="instructions">
        <div>
-          <p>To install Haskell, if you are running Linux, macOS, FreeBSD or Windows Subsystem for Linux, run the following
+          <p>To install Haskell, if you are running Linux, macOS or FreeBSD,<br/>run the following
          in your terminal (as a user other than root), then follow the onscreen instructions.</p>
 		  <div class="command-button"><pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre><button class="tooltip" onclick="copyToClipboard()"><img src="copy.svg" alt="" /><span class="tooltiptext">Copy to clipboard</span></button></div>
          <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.</p>
@@ -146,7 +140,7 @@

      <div id="platform-instructions-default" class="instructions">
        <div>
-          <p>To install Haskell, if you are running Linux, macOS, FreeBSD or Windows Subsystem for Linux, run the following
+          <p>To install Haskell, if you are running Linux, macOS or FreeBSD,<br/>run the following
          in your terminal (as a user other than root), then follow the onscreen instructions.</p>
 		  <pre><span class='ghcup-command'>curl --proto '=https' --tlsv1.2 -sSf https://get-ghcup.haskell.org | sh</span></pre>
          <p class="other-help">If you don't like curl | sh, see <a href="https://gitlab.haskell.org/haskell/ghcup-hs#manual-install">other installation methods</a>.</p>