Merge branch 'stack-support'

.gitlab/before_script/darwin/install_deps.sh

@@ -10,8 +10,8 @@ curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-apple-darwin-ghcup > ./gh
 chmod +x ghcup-bin
 
 ./ghcup-bin upgrade -i -f
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
+./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml set ${GHC_VERSION}
+./ghcup-bin set ${GHC_VERSION}
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
+./ghcup-bin install-cabal ${CABAL_VERSION}
 
 exit 0

.gitlab/before_script/freebsd/install_deps.sh

@@ -12,8 +12,8 @@ curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-portbld-freebsd-ghcup > .
 chmod +x ghcup-bin
 
 ./ghcup-bin upgrade -i -f
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
+./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml set ${GHC_VERSION}
+./ghcup-bin set ${GHC_VERSION}
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
+./ghcup-bin install-cabal ${CABAL_VERSION}
 
 exit 0

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

@@ -28,8 +28,8 @@ else
 fi
 chmod +x ghcup-bin
 ./ghcup-bin upgrade -i -f
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
+./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
+./ghcup-bin install-cabal ${CABAL_VERSION}
 
 # utils
 apk add --no-cache \

.gitlab/before_script/linux/install_deps.sh

@@ -13,7 +13,7 @@ curl -sSfL https://downloads.haskell.org/~ghcup/x86_64-linux-ghcup > ./ghcup-bin
 chmod +x ghcup-bin
 
 ./ghcup-bin upgrade -i -f
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install ${GHC_VERSION}
+./ghcup-bin install ${GHC_VERSION}
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml set ${GHC_VERSION}
+./ghcup-bin set ${GHC_VERSION}
-./ghcup-bin -s file://$(pwd)/ghcup-${JSON_VERSION}.yaml install-cabal ${CABAL_VERSION}
+./ghcup-bin install-cabal ${CABAL_VERSION}
 

.gitlab/script/ghcup_version.sh

@@ -96,14 +96,19 @@ eghcup set ${GHC_VERSION}
 eghcup rm 8.10.3
 [ "$(ghc --numeric-version)" = "${ghc_ver}" ]
 
-# install hls
 if [ "${OS}" = "DARWIN" ] ; then
 	eghcup install hls
 	haskell-language-server-wrapper --version
+
+	eghcup install stack
+	stack --version
 elif [ "${OS}" = "LINUX" ] ; then
 	if [ "${ARCH}" = "64" ] ; then
 		eghcup install hls
 		haskell-language-server-wrapper --version
+
+		eghcup install stack
+		stack --version
 	fi
 fi
 

CHANGELOG.md

@@ -5,6 +5,11 @@
 * Add date to GHC bindist names created by ghcup
 * Warn when /tmp doesn't have 5GB or more of disk space
 * Allow to compile GHC from git repo wrt [#126](https://gitlab.haskell.org/haskell/ghcup-hs/-/issues/126)
+* Add stack support
+
+## 0.1.14.2 -- 2021-05-12
+
+* Remove dead dependency on ascii-string
 
 ## 0.1.14.1 -- 2021-04-11
 

app/ghcup/BrickMain.hs

@@ -66,7 +66,8 @@ data BrickData = BrickData
   deriving Show
 
 data BrickSettings = BrickSettings
-  { showAll :: Bool
+  { showAllVersions :: Bool
+  , showAllTools    :: Bool
   }
   deriving Show
 
@@ -97,17 +98,22 @@ keyHandlers KeyBindings {..} =
   , (bUninstall, const "Uninstall", withIOAction del')
   , (bSet, const "Set"      , withIOAction set')
   , (bChangelog, const "ChangeLog", withIOAction changelog')
-  , ( bShowAll
+  , ( bShowAllVersions
     , \BrickSettings {..} ->
-       if showAll then "Hide old versions" else "Show all versions"
+       if showAllVersions then "Don't show all versions" else "Show all versions"
-    , hideShowHandler
+    , hideShowHandler (not . showAllVersions) showAllTools
+    )
+  , ( bShowAllTools
+    , \BrickSettings {..} ->
+       if showAllTools then "Don't show all tools" else "Show all tools"
+    , hideShowHandler showAllVersions (not . showAllTools)
     )
   , (bUp, const "Up", \BrickState {..} -> continue BrickState{ appState = moveCursor 1 appState Up, .. })
   , (bDown, const "Down", \BrickState {..} -> continue BrickState{ appState = moveCursor 1 appState Down, .. })
   ]
  where
-  hideShowHandler BrickState{..} =
+  hideShowHandler f p BrickState{..} =
-    let newAppSettings   = appSettings { showAll = not . showAll $ appSettings }
+    let newAppSettings   = appSettings { showAllVersions = f appSettings , showAllTools = p appSettings }
         newInternalState = constructList appData newAppSettings (Just appState)
     in  continue (BrickState appData newAppSettings newInternalState appKeys)
 
@@ -142,7 +148,12 @@ ui dimAttrs BrickState{ appSettings = as@BrickSettings{}, ..}
       <+> minHSize 15 (str "Version")
       <+> padLeft (Pad 1) (minHSize 25 $ str "Tags")
       <+> padLeft (Pad 5) (str "Notes")
-  renderList' = withDefAttr listAttr . drawListElements renderItem True
+  renderList' = withDefAttr listAttr . drawListElements renderItem True . filterStack
+  filterStack appState'
+    | showAllTools as = appState'
+    | let v = clr appState'
+          nv = V.filter (\ListResult{..} -> lTool /= Stack) v
+    , otherwise = BrickInternalState { clr = nv, ix = ix appState' }
   renderItem _ b listResult@ListResult{..} =
     let marks = if
           | lSet       -> (withAttr "set" $ str "✔✔")
@@ -194,6 +205,7 @@ ui dimAttrs BrickState{ appSettings = as@BrickSettings{}, ..}
   printTool GHC = str "GHC"
   printTool GHCup = str "GHCup"
   printTool HLS = str "HLS"
+  printTool Stack = str "Stack"
 
   printNotes ListResult {..} =
     (if hlsPowered then [withAttr "hls-powered" $ str "hls-powered"] else mempty
@@ -351,7 +363,7 @@ constructList :: BrickData
               -> Maybe BrickInternalState
               -> BrickInternalState
 constructList appD appSettings =
-  replaceLR (filterVisible (showAll appSettings)) (lr appD)
+  replaceLR (filterVisible (showAllVersions appSettings)) (lr appD)
 
 listSelectedElement' :: BrickInternalState -> Maybe (Int, ListResult)
 listSelectedElement' BrickInternalState{..} = fmap (ix, ) $ clr !? ix
@@ -385,8 +397,8 @@ replaceLR filterF lr s =
 
 
 filterVisible :: Bool -> ListResult -> Bool
-filterVisible showAll e | lInstalled e = True
+filterVisible showAllVersions e | lInstalled e = True
-                        | showAll      = True
+                                | showAllVersions = True
                                 | otherwise    = not (elem Old (lTag e))
 
 
@@ -432,6 +444,9 @@ install' BrickState { appData = BrickData {..} } (_, ListResult {..}) = do
         HLS   -> do
           let vi = getVersionInfo lVer HLS dls
           liftE $ installHLSBin dls lVer pfreq $> vi
+        Stack -> do
+          let vi = getVersionInfo lVer Stack dls
+          liftE $ installStackBin dls lVer pfreq $> vi
     )
     >>= \case
           VRight vi                         -> do
@@ -460,6 +475,7 @@ set' _ (_, ListResult {..}) = do
         GHC   -> liftE $ setGHC (GHCTargetVersion lCross lVer) SetGHCOnly $> ()
         Cabal -> liftE $ setCabal lVer $> ()
         HLS   -> liftE $ setHLS lVer $> ()
+        Stack -> liftE $ setStack lVer $> ()
         GHCup -> pure ()
     )
     >>= \case
@@ -481,6 +497,7 @@ del' BrickState { appData = BrickData {..} } (_, ListResult {..}) = do
         GHC   -> liftE $ rmGHCVer (GHCTargetVersion lCross lVer) $> vi
         Cabal -> liftE $ rmCabalVer lVer $> vi
         HLS   -> liftE $ rmHLSVer lVer $> vi
+        Stack -> liftE $ rmStackVer lVer $> vi
         GHCup -> pure Nothing
     )
     >>= \case
@@ -564,7 +581,7 @@ brickMain s l av pfreq' = do
 
 
 defaultAppSettings :: BrickSettings
-defaultAppSettings = BrickSettings { showAll = False }
+defaultAppSettings = BrickSettings { showAllVersions = False, showAllTools = False }
 
 
 getDownloads' :: IO (Either String GHCupDownloads)

app/ghcup/Main.hs

@@ -126,6 +126,7 @@ toSetToolVer Nothing = SetRecommended
 data InstallCommand = InstallGHC InstallOptions
                     | InstallCabal InstallOptions
                     | InstallHLS InstallOptions
+                    | InstallStack InstallOptions
 
 data InstallOptions = InstallOptions
   { instVer      :: Maybe ToolVersion
@@ -137,6 +138,7 @@ data InstallOptions = InstallOptions
 data SetCommand = SetGHC SetOptions
                 | SetCabal SetOptions
                 | SetHLS SetOptions
+                | SetStack SetOptions
 
 -- a superset of ToolVersion
 data SetToolVersion = SetToolVersion GHCTargetVersion
@@ -157,6 +159,7 @@ data ListOptions = ListOptions
 data RmCommand = RmGHC RmOptions
                | RmCabal Version
                | RmHLS Version
+               | RmStack Version
 
 data RmOptions = RmOptions
   { ghcVer :: GHCTargetVersion
@@ -432,6 +435,15 @@ installParser =
                  <> footerDoc (Just $ text installHLSFooter)
                  )
            )
+      <> command
+           "stack"
+           (   InstallStack
+           <$> info
+                 (installOpts (Just Stack) <**> helper)
+                 (  progDesc "Install stack"
+                 <> footerDoc (Just $ text installStackFooter)
+                 )
+           )
       )
     )
     <|> (Right <$> installOpts Nothing)
@@ -442,9 +454,17 @@ installParser =
   into "~/.ghcup/bin"
 
 Examples:
-  # install recommended GHC
+  # install recommended HLS
   ghcup install hls|]
 
+  installStackFooter :: String
+  installStackFooter = [s|Discussion:
+  Installs stack binaries into "~/.ghcup/bin"
+
+Examples:
+  # install recommended Stack
+  ghcup install stack|]
+
   installGHCFooter :: String
   installGHCFooter = [s|Discussion:
   Installs the specified GHC version (or a recommended default one) into
@@ -528,6 +548,15 @@ setParser =
                  <> footerDoc (Just $ text setHLSFooter)
                  )
            )
+      <> command
+           "stack"
+           (   SetStack
+           <$> info
+                 (setOpts (Just Stack) <**> helper)
+                 (  progDesc "Set stack version"
+                 <> footerDoc (Just $ text setStackFooter)
+                 )
+           )
       )
     )
     <|> (Right <$> setOpts Nothing)
@@ -542,6 +571,10 @@ setParser =
   setCabalFooter = [s|Discussion:
     Sets the the current Cabal version.|]
 
+  setStackFooter :: String
+  setStackFooter = [s|Discussion:
+    Sets the the current Stack version.|]
+
   setHLSFooter :: String
   setHLSFooter = [s|Discussion:
     Sets the the current haskell-language-server version.|]
@@ -594,6 +627,12 @@ rmParser =
            <$> info (versionParser' (Just ListInstalled) (Just HLS) <**> helper)
                     (progDesc "Remove haskell-language-server version")
            )
+      <> command
+           "stack"
+           (   RmStack
+           <$> info (versionParser' (Just ListInstalled) (Just Stack) <**> helper)
+                    (progDesc "Remove stack version")
+           )
       )
     )
     <|> (Right <$> rmOpts Nothing)
@@ -615,6 +654,7 @@ changelogP =
                 "ghc"   -> Right GHC
                 "cabal" -> Right Cabal
                 "ghcup" -> Right GHCup
+                "stack" -> Right Stack
                 e       -> Left e
               )
             )
@@ -986,7 +1026,8 @@ toSettings options = do
          , bUninstall = fromMaybe bUninstall kUninstall
          , bSet = fromMaybe bSet kSet
          , bChangelog = fromMaybe bChangelog kChangelog
-         , bShowAll = fromMaybe bShowAll kShowAll
+         , bShowAllVersions = fromMaybe bShowAllVersions kShowAll
+         , bShowAllTools = fromMaybe bShowAllTools kShowAllTools
          }
 
 
@@ -1325,6 +1366,36 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                             $(logError) [i|Also check the logs in #{logsDir}|]
                           pure $ ExitFailure 4
 
+          let installStack InstallOptions{..} =
+                (case instBindist of
+                   Nothing -> runInstTool $ do
+                     (v, vi) <- liftE $ fromVersion dls instVer Stack
+                     liftE $ installStackBin dls (_tvVersion v) (fromMaybe pfreq instPlatform)
+                     pure vi
+                   Just uri -> runInstTool' appstate{ settings = settings { noVerify = True}} $ do
+                     (v, vi) <- liftE $ fromVersion dls instVer Stack
+                     liftE $ installStackBindist
+                         (DownloadInfo uri Nothing "")
+                         (_tvVersion v)
+                         (fromMaybe pfreq instPlatform)
+                     pure vi
+                  )
+                  >>= \case
+                        VRight vi -> do
+                          runLogger $ $(logInfo) "Stack installation successful"
+                          forM_ (_viPostInstall =<< vi) $ \msg ->
+                            runLogger $ $(logInfo) msg
+                          pure ExitSuccess
+                        VLeft (V (AlreadyInstalled _ v)) -> do
+                          runLogger $ $(logWarn)
+                            [i|Stack ver #{prettyVer v} already installed; if you really want to reinstall it, you may want to run 'ghcup rm stack #{prettyVer v}' first|]
+                          pure ExitSuccess
+                        VLeft e -> do
+                          runLogger $ do
+                            $(logError) $ T.pack $ prettyShow e
+                            $(logError) [i|Also check the logs in #{logsDir}|]
+                          pure $ ExitFailure 4
+
 
           let setGHC' SetOptions{..} =
                 runSetGHC (do
@@ -1373,6 +1444,22 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                           runLogger $ $(logError) $ T.pack $ prettyShow e
                           pure $ ExitFailure 14
 
+          let setStack' SetOptions{..} =
+                runSetCabal (do
+                    v <- liftE $ fst <$> fromVersion' dls sToolVer Stack
+                    liftE $ setStack (_tvVersion v)
+                    pure v
+                  )
+                  >>= \case
+                        VRight GHCTargetVersion{..} -> do
+                          runLogger
+                            $ $(logInfo)
+                                [i|Stack #{prettyVer _tvVersion} successfully set as default version|]
+                          pure ExitSuccess
+                        VLeft  e -> do
+                          runLogger $ $(logError) $ T.pack $ prettyShow e
+                          pure $ ExitFailure 14
+
           let rmGHC' RmOptions{..} =
                 runRm (do
                     liftE $
@@ -1418,6 +1505,20 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
                           runLogger $ $(logError) $ T.pack $ prettyShow e
                           pure $ ExitFailure 15
 
+          let rmStack' tv =
+                runRm (do
+                    liftE $
+                      rmStackVer tv
+                    pure (getVersionInfo tv Stack dls)
+                  )
+                  >>= \case
+                        VRight vi -> do
+                          forM_ (_viPostRemove =<< vi) $ \msg ->
+                            runLogger $ $(logInfo) msg
+                          pure ExitSuccess
+                        VLeft  e -> do
+                          runLogger $ $(logError) $ T.pack $ prettyShow e
+                          pure $ ExitFailure 15
 
           res <- case optCommand of
 #if defined(BRICK)
@@ -1429,6 +1530,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
             Install (Left (InstallGHC iopts)) -> installGHC iopts
             Install (Left (InstallCabal iopts)) -> installCabal iopts
             Install (Left (InstallHLS iopts)) -> installHLS iopts
+            Install (Left (InstallStack iopts)) -> installStack iopts
             InstallCabalLegacy iopts -> do
               runLogger ($(logWarn) [i|This is an old-style command for installing cabal. Use 'ghcup install cabal' instead.|])
               installCabal iopts
@@ -1439,6 +1541,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
             Set (Left (SetGHC sopts)) -> setGHC' sopts
             Set (Left (SetCabal sopts)) -> setCabal' sopts
             Set (Left (SetHLS sopts)) -> setHLS' sopts
+            Set (Left (SetStack sopts)) -> setStack' sopts
 
             List ListOptions {..} ->
               runListGHC (do
@@ -1453,6 +1556,7 @@ Report bugs at <https://gitlab.haskell.org/haskell/ghcup-hs/issues>|]
             Rm (Left (RmGHC rmopts)) -> rmGHC' rmopts
             Rm (Left (RmCabal rmopts)) -> rmCabal' rmopts
             Rm (Left (RmHLS rmopts)) -> rmHLS' rmopts
+            Rm (Left (RmStack rmopts)) -> rmStack' rmopts
 
             DInfo ->
               do runDebugInfo $ liftE getDebugInfo
@@ -1654,6 +1758,16 @@ fromVersion' av SetNext tool = do
         . cycle
         . sort
         $ hlses) ?? NoToolVersionSet tool
+    Stack -> do
+      set <- stackSet !? NoToolVersionSet tool
+      stacks <- rights <$> lift getInstalledStacks
+      (fmap (GHCTargetVersion Nothing)
+        . headMay
+        . tail
+        . dropWhile (/= set)
+        . cycle
+        . sort
+        $ stacks) ?? NoToolVersionSet tool
     GHCup -> fail "GHCup cannot be set"
   let vi = getVersionInfo (_tvVersion next) tool av
   pure (next, vi)
@@ -1852,6 +1966,13 @@ checkForUpdates dls pfreq = do
         $ $(logWarn)
             [i|New HLS version available: #{prettyVer l}. To upgrade, run 'ghcup install hls #{prettyVer l}'|]
 
+  forM_ (getLatest dls Stack) $ \(l, _) -> do
+    let mstack_ver = latestInstalled Stack
+    forM mstack_ver $ \stack_ver ->
+      when (l > stack_ver)
+        $ $(logWarn)
+            [i|New Stack version available: #{prettyVer l}. To upgrade, run 'ghcup install stack #{prettyVer l}'|]
+
 
 prettyDebugInfo :: DebugInfo -> String
 prettyDebugInfo DebugInfo {..} = [i|Debug Info

config.yaml

@@ -29,6 +29,8 @@ key-bindings:
     KChar: 'c'
   show-all:
     KChar: 'a'
+  show-all-tools:
+    KChar: 't'
 
 # Where to get GHC/cabal/hls download info/versions from. For more detailed explanation
 # check the 'URLSource' type in the code.

ghcup-0.0.4.yaml

@@ -1835,3 +1835,45 @@ ghcupDownloads:
               dlHash: 4e89b192e2f49637d772e974f2c17b16da067ecd5912575eaa542551de97681b
           Linux_Alpine:
             unknown_versioning: *hls-64
+  Stack:
+    2.5.1:
+      viTags: []
+      viChangeLog: https://github.com/commercialhaskell/stack/blob/master/ChangeLog.md#v251
+      viArch:
+        A_64:
+          Linux_UnknownLinux:
+            unknown_versioning: &stack-251-64
+              dlUri: https://github.com/commercialhaskell/stack/releases/download/v2.5.1/stack-2.5.1-linux-x86_64.tar.gz
+              dlHash: c83b6c93d6541c0bce2175085a04062020f4160a86116e20f3b343b562f2d1e8
+              dlSubdir:
+                RegexDir: "stack-.*"
+          Darwin:
+            unknown_versioning:
+              dlUri: https://github.com/commercialhaskell/stack/releases/download/v2.5.1/stack-2.5.1-osx-x86_64.tar.gz
+              dlHash: f4aedfa8fbe371f77286ee97ec5c3c553842e7ae15b2952a8b8442dccba04bf0
+              dlSubdir:
+                RegexDir: "stack-.*"
+          Linux_Alpine:
+            unknown_versioning: *stack-251-64
+    2.7.1:
+      viTags:
+        - Recommended
+        - Latest
+      viChangeLog: https://github.com/commercialhaskell/stack/blob/master/ChangeLog.md#v271
+      viArch:
+        A_64:
+          Linux_UnknownLinux:
+            unknown_versioning: &stack-64
+              dlUri: https://github.com/commercialhaskell/stack/releases/download/v2.7.1/stack-2.7.1-linux-x86_64.tar.gz
+              dlHash: 2bc47749ee4be5eccb52a2d4a6a00b0f3b28b92517742b40c675836d7db2777d
+              dlSubdir:
+                RegexDir: "stack-.*"
+          Darwin:
+            unknown_versioning:
+              dlUri: https://github.com/commercialhaskell/stack/releases/download/v2.7.1/stack-2.7.1-osx-x86_64.tar.gz
+              dlHash: 4248c6fbc87e8a2c06f39e867eb5ef28eae0d99470137cb415356c631c0dcbf2
+              dlSubdir:
+                RegexDir: "stack-.*"
+          Linux_Alpine:
+            unknown_versioning: *stack-64
+

ghcup.cabal

@@ -1,6 +1,6 @@
 cabal-version:   3.0
 name:            ghcup
-version:         0.1.14.1
+version:         0.1.14.2
 license:         LGPL-3.0-only
 license-file:    LICENSE
 copyright:       Julian Ospald 2020
@@ -85,7 +85,6 @@ library
 
   build-depends:
     , aeson                 >=1.4        && <1.6
-    , ascii-string          ^>=1.0
     , async                 >=0.8        && <2.3
     , base                  >=4.13       && <5
     , base16-bytestring     >=0.1.1.6    && <1.1

lib/GHCup.hs

@@ -503,6 +503,115 @@ installHLSBin bDls ver pfreq = do
   installHLSBindist dlinfo ver pfreq
 
 
+-- | Installs stack into @~\/.ghcup\/bin/stack-\<ver\>@ and
+-- creates a default @stack -> stack-x.y.z.q@ symlink for
+-- the latest installed version.
+installStackBin :: ( MonadMask m
+                   , MonadCatch m
+                   , MonadReader AppState m
+                   , MonadLogger m
+                   , MonadResource m
+                   , MonadIO m
+                   , MonadUnliftIO m
+                   , MonadFail m
+                   )
+                => GHCupDownloads
+                -> Version
+                -> PlatformRequest
+                -> Excepts
+                     '[ AlreadyInstalled
+                      , CopyError
+                      , DigestError
+                      , DownloadFailed
+                      , NoDownload
+                      , NotInstalled
+                      , UnknownArchive
+                      , TarDirDoesNotExist
+#if !defined(TAR)
+                      , ArchiveResult
+#endif
+                      ]
+                     m
+                     ()
+installStackBin bDls ver pfreq = do
+  dlinfo <- lE $ getDownloadInfo Stack ver pfreq bDls
+  installStackBindist dlinfo ver pfreq
+
+
+-- | Like 'installStackBin', except takes the 'DownloadInfo' as
+-- argument instead of looking it up from 'GHCupDownloads'.
+installStackBindist :: ( MonadMask m
+                       , MonadCatch m
+                       , MonadReader AppState m
+                       , MonadLogger m
+                       , MonadResource m
+                       , MonadIO m
+                       , MonadUnliftIO m
+                       , MonadFail m
+                       )
+                    => DownloadInfo
+                    -> Version
+                    -> PlatformRequest
+                    -> Excepts
+                         '[ AlreadyInstalled
+                          , CopyError
+                          , DigestError
+                          , DownloadFailed
+                          , NoDownload
+                          , NotInstalled
+                          , UnknownArchive
+                          , TarDirDoesNotExist
+#if !defined(TAR)
+                          , ArchiveResult
+#endif
+                          ]
+                         m
+                         ()
+installStackBindist dlinfo ver PlatformRequest {..} = do
+  lift $ $(logDebug) [i|Requested to install stack version #{ver}|]
+
+  AppState {dirs = Dirs {..}} <- lift ask
+
+  whenM (lift (hlsInstalled ver))
+    (throwE $ AlreadyInstalled Stack ver)
+
+  -- download (or use cached version)
+  dl                           <- liftE $ downloadCached dlinfo Nothing
+
+  -- unpack
+  tmpUnpack                    <- lift withGHCupTmpDir
+  liftE $ unpackToDir tmpUnpack dl
+  void $ liftIO $ darwinNotarization _rPlatform tmpUnpack
+
+  -- the subdir of the archive where we do the work
+  workdir <- maybe (pure tmpUnpack) (liftE . intoSubdir tmpUnpack) (view dlSubdir dlinfo)
+
+  liftE $ installStack' workdir binDir
+
+  -- create symlink if this is the latest version
+  sVers <- lift $ fmap rights getInstalledStacks
+  let lInstStack = headMay . reverse . sort $ sVers
+  when (maybe True (ver >=) lInstStack) $ liftE $ setStack ver
+
+ where
+  -- | Install an unpacked stack distribution.
+  installStack' :: (MonadLogger m, MonadCatch m, MonadIO m)
+                => Path Abs      -- ^ Path to the unpacked stack bindist (where the executable resides)
+                -> Path Abs      -- ^ Path to install to
+                -> Excepts '[CopyError] m ()
+  installStack' path inst = do
+    lift $ $(logInfo) "Installing stack"
+    let stackFile = [rel|stack|]
+    liftIO $ createDirRecursive' inst
+    destFileName <- lift $ parseRel (toFilePath stackFile <> "-" <> verToBS ver)
+    let destPath = inst </> destFileName
+    handleIO (throwE . CopyError . show) $ liftIO $ copyFile
+      (path </> stackFile)
+      destPath
+      Overwrite
+    lift $ chmod_755 destPath
+
+
 
 
     ---------------------
@@ -681,6 +790,35 @@ setHLS ver = do
   pure ()
 
 
+-- | Set the @~\/.ghcup\/bin\/stack@ symlink.
+setStack :: (MonadReader AppState m, MonadLogger m, MonadThrow m, MonadFail m, MonadIO m)
+         => Version
+         -> Excepts '[NotInstalled] m ()
+setStack ver = do
+  let verBS = verToBS ver
+  targetFile <- parseRel ("stack-" <> verBS)
+
+  -- symlink destination
+  AppState {dirs = Dirs {..}} <- lift ask
+  liftIO $ createDirRecursive' binDir
+
+  whenM (liftIO $ not <$> doesFileExist (binDir </> targetFile))
+    $ throwE
+    $ NotInstalled Stack (GHCTargetVersion Nothing ver)
+
+  let stackbin = binDir </> [rel|stack|]
+
+  -- delete old file (may be binary or symlink)
+  lift $ $(logDebug) [i|rm -f #{toFilePath stackbin}|]
+  liftIO $ hideError doesNotExistErrorType $ deleteFile
+    stackbin
+
+  -- create symlink
+  let destL = toFilePath targetFile
+  lift $ $(logDebug) [i|ln -s #{destL} #{toFilePath stackbin}|]
+  liftIO $ createSymlink stackbin destL
+
+  pure ()
 
 
 
@@ -738,15 +876,17 @@ listVersions av lt' criteria pfreq = do
   cabals <- getInstalledCabals' cSet
   hlsSet' <- hlsSet
   hlses <- getInstalledHLSs
+  sSet <- stackSet
+  stacks <- getInstalledStacks
 
-  go lt' cSet cabals hlsSet' hlses
+  go lt' cSet cabals hlsSet' hlses sSet stacks
  where
-  go lt cSet cabals hlsSet' hlses = do
+  go lt cSet cabals hlsSet' hlses sSet stacks = do
     case lt of
       Just t -> do
         -- get versions from GHCupDownloads
         let avTools = availableToolVersions av t
-        lr <- filter' <$> forM (Map.toList avTools) (toListResult t cSet cabals hlsSet' hlses)
+        lr <- filter' <$> forM (Map.toList avTools) (toListResult t cSet cabals hlsSet' hlses sSet stacks)
 
         case t of
           GHC -> do
@@ -758,13 +898,17 @@ listVersions av lt' criteria pfreq = do
           HLS -> do
             slr <- strayHLS avTools
             pure (sort (slr ++ lr))
+          Stack -> do
+            slr <- strayStacks avTools
+            pure (sort (slr ++ lr))
           GHCup -> pure lr
       Nothing -> do
-        ghcvers   <- go (Just GHC) cSet cabals hlsSet' hlses
+        ghcvers   <- go (Just GHC) cSet cabals hlsSet' hlses sSet stacks
-        cabalvers <- go (Just Cabal) cSet cabals hlsSet' hlses
+        cabalvers <- go (Just Cabal) cSet cabals hlsSet' hlses sSet stacks
-        hlsvers   <- go (Just HLS) cSet cabals hlsSet' hlses
+        hlsvers   <- go (Just HLS) cSet cabals hlsSet' hlses sSet stacks
-        ghcupvers <- go (Just GHCup) cSet cabals hlsSet' hlses
+        ghcupvers <- go (Just GHCup) cSet cabals hlsSet' hlses sSet stacks
-        pure (ghcvers <> cabalvers <> hlsvers <> ghcupvers)
+        stackvers <- go (Just Stack) cSet cabals hlsSet' hlses sSet stacks
+        pure (ghcvers <> cabalvers <> hlsvers <> stackvers <> ghcupvers)
   strayGHCs :: (MonadCatch m, MonadReader AppState m, MonadThrow m, MonadLogger m, MonadIO m)
             => Map.Map Version [Tag]
             -> m [ListResult]
@@ -864,6 +1008,34 @@ listVersions av lt' criteria pfreq = do
           [i|Could not parse version of stray directory #{toFilePath e}|]
         pure Nothing
 
+  strayStacks :: (MonadReader AppState m, MonadCatch m, MonadThrow m, MonadLogger m, MonadIO m)
+              => Map.Map Version [Tag]
+              -> m [ListResult]
+  strayStacks avTools = do
+    stacks <- getInstalledStacks
+    fmap catMaybes $ forM stacks $ \case
+      Right ver ->
+        case Map.lookup ver avTools of
+          Just _  -> pure Nothing
+          Nothing -> do
+            lSet    <- fmap (== Just ver) hlsSet
+            pure $ Just $ ListResult
+              { lTool      = Stack
+              , lVer       = ver
+              , lCross     = Nothing
+              , lTag       = []
+              , lInstalled = True
+              , lStray     = isNothing (Map.lookup ver avTools)
+              , lNoBindist = False
+              , fromSrc    = False -- actually, we don't know :>
+              , hlsPowered = False
+              , ..
+              }
+      Left e -> do
+        $(logWarn)
+          [i|Could not parse version of stray directory #{toFilePath e}|]
+        pure Nothing
+
   -- NOTE: this are not cross ones, because no bindists
   toListResult :: (MonadLogger m, MonadReader AppState m, MonadIO m, MonadCatch m)
                => Tool
@@ -871,9 +1043,11 @@ listVersions av lt' criteria pfreq = do
                -> [Either (Path Rel) Version]
                -> Maybe Version
                -> [Either (Path Rel) Version]
+               -> Maybe Version
+               -> [Either (Path Rel) Version]
                -> (Version, [Tag])
                -> m ListResult
-  toListResult t cSet cabals hlsSet' hlses (v, tags) = case t of
+  toListResult t cSet cabals hlsSet' hlses stackSet' stacks (v, tags) = case t of
     GHC -> do
       let lNoBindist = isLeft $ getDownloadInfo GHC v pfreq av
       let tver = mkTVer v
@@ -921,6 +1095,19 @@ listVersions av lt' criteria pfreq = do
                       , hlsPowered = False
                       , ..
                       }
+    Stack -> do
+      let lNoBindist = isLeft $ getDownloadInfo Stack v pfreq av
+      let lSet = stackSet' == Just v
+      let lInstalled = elem v $ rights stacks
+      pure ListResult { lVer    = v
+                      , lCross  = Nothing
+                      , lTag    = tags
+                      , lTool   = t
+                      , fromSrc = False
+                      , lStray  = False
+                      , hlsPowered = False
+                      , ..
+                      }
 
 
   filter' :: [ListResult] -> [ListResult]
@@ -1038,6 +1225,28 @@ rmHLSVer ver = do
       Nothing        -> pure ()
 
 
+-- | Delete a stack version. Will try to fix the @stack@ symlink
+-- after removal (e.g. setting it to an older version).
+rmStackVer :: (MonadReader AppState m, MonadThrow m, MonadLogger m, MonadIO m, MonadFail m, MonadCatch m)
+           => Version
+           -> Excepts '[NotInstalled] m ()
+rmStackVer ver = do
+  whenM (lift $ fmap not $ stackInstalled ver) $ throwE (NotInstalled Stack (GHCTargetVersion Nothing ver))
+
+  sSet      <- lift stackSet
+
+  AppState {dirs = Dirs {..}} <- lift ask
+
+  stackFile <- lift $ parseRel ("stack-" <> verToBS ver)
+  liftIO $ hideError doesNotExistErrorType $ deleteFile (binDir </> stackFile)
+
+  when (Just ver == sSet) $ do
+    sVers <- lift $ fmap rights getInstalledStacks
+    case headMay . reverse . sort $ sVers of
+      Just latestver -> setStack latestver
+      Nothing        -> liftIO $ hideError doesNotExistErrorType $ deleteFile
+        (binDir </> [rel|stack|])
+
 
 
     ------------------

lib/GHCup/Types.hs

@@ -85,6 +85,7 @@ data Tool = GHC
           | Cabal
           | GHCup
           | HLS
+          | Stack
   deriving (Eq, GHC.Generic, Ord, Show, Enum, Bounded)
 
 
@@ -257,6 +258,7 @@ data UserKeyBindings = UserKeyBindings
   , kSet       :: Maybe Vty.Key
   , kChangelog :: Maybe Vty.Key
   , kShowAll   :: Maybe Vty.Key
+  , kShowAllTools :: Maybe Vty.Key
   }
   deriving (Show, GHC.Generic)
 
@@ -268,7 +270,8 @@ data KeyBindings = KeyBindings
   , bUninstall :: Vty.Key
   , bSet       :: Vty.Key
   , bChangelog :: Vty.Key
-  , bShowAll   :: Vty.Key
+  , bShowAllVersions :: Vty.Key
+  , bShowAllTools :: Vty.Key
   }
   deriving (Show, GHC.Generic)
 
@@ -281,7 +284,8 @@ defaultKeyBindings = KeyBindings
   , bUninstall = Vty.KChar 'u'
   , bSet = Vty.KChar 's'
   , bChangelog = Vty.KChar 'c'
-  , bShowAll = Vty.KChar 'a'
+  , bShowAllVersions = Vty.KChar 'a'
+  , bShowAllTools = Vty.KChar 't'
   }
 
 data AppState = AppState

lib/GHCup/Utils.hs

@@ -359,6 +359,54 @@ getInstalledHLSs = do
         Just (Left  _) -> pure $ Left f
         Nothing        -> pure $ Left f
 
+-- | Get all installed stacks, by matching on
+-- @~\/.ghcup\/bin/stack-<\stackver\>@.
+getInstalledStacks :: (MonadReader AppState m, MonadIO m, MonadCatch m)
+                   => m [Either (Path Rel) Version]
+getInstalledStacks = do
+  AppState { dirs = Dirs {..} } <- ask
+  bins                          <- liftIO $ handleIO (\_ -> pure []) $ findFiles
+    binDir
+    (makeRegexOpts compExtended
+                   execBlank
+                   ([s|^stack-.*$|] :: ByteString)
+    )
+  forM bins $ \f ->
+    case
+          fmap (version . decUTF8Safe) . B.stripPrefix "stack-" . toFilePath $ f
+      of
+        Just (Right r) -> pure $ Right r
+        Just (Left  _) -> pure $ Left f
+        Nothing        -> pure $ Left f
+
+-- Return the currently set stack version, if any.
+-- TODO: there's a lot of code duplication here :>
+stackSet :: (MonadReader AppState m, MonadIO m, MonadThrow m, MonadCatch m) => m (Maybe Version)
+stackSet = do
+  AppState {dirs = Dirs {..}} <- ask
+  let stackBin = binDir </> [rel|stack|]
+
+  liftIO $ handleIO' NoSuchThing (\_ -> pure Nothing) $ do
+    broken <- isBrokenSymlink stackBin
+    if broken
+      then pure Nothing
+      else do
+        link <- readSymbolicLink $ toFilePath stackBin
+        Just <$> linkVersion link
+ where
+  linkVersion :: MonadThrow m => ByteString -> m Version
+  linkVersion bs = do
+    t <- throwEither $ E.decodeUtf8' bs
+    throwEither $ MP.parse parser "" t
+   where
+    parser =
+      MP.chunk "stack-" *> version'
+
+-- | Whether the given Stack version is installed.
+stackInstalled :: (MonadIO m, MonadReader AppState m, MonadCatch m) => Version -> m Bool
+stackInstalled ver = do
+  vers <- fmap rights getInstalledStacks
+  pure $ elem ver vers
 
 -- | Whether the given HLS version is installed.
 hlsInstalled :: (MonadIO m, MonadReader AppState m, MonadCatch m) => Version -> m Bool