Merge branch 'CIi'

.gitlab/script/ghcup_version.sh

@@ -217,6 +217,8 @@ if [ "${OS}" = "LINUX" ] ; then
 	fi
 fi
 
+eghcup gc -c
+
 sha_sum() {
 	if [ "${OS}" = "FREEBSD" ] ; then
 		sha256 "$@"

app/ghcup/GHCup/OptParse/Compile.hs

@@ -99,7 +99,7 @@ data HLSCompileOptions = HLSCompileOptions
     --[ Parsers ]--
     ---------------
 
-          
+
 compileP :: Parser CompileCommand
 compileP = subparser
   (  command
@@ -541,11 +541,11 @@ compile compileCommand settings Dirs{..} runAppState runLogger = do
                 pure ExitSuccess
               VLeft (V (AlreadyInstalled _ v)) -> do
                 runLogger $ logWarn $
-                  "GHC ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install ghc --force " <> prettyVer v <> "'"
+                  "GHC ver " <> prettyVer v <> " already installed, remove it first to reinstall"
                 pure ExitSuccess
               VLeft (V (DirNotEmpty fp)) -> do
-                runLogger $ logWarn $
-                  "Install directory " <> T.pack fp <> " is not empty. Use 'ghcup install ghc --isolate " <> T.pack fp <> " --force ..." <> "' to install regardless."
+                runLogger $ logError $
+                  "Install directory " <> T.pack fp <> " is not empty."
                 pure $ ExitFailure 3
               VLeft err@(V (BuildFailed tmpdir _)) -> do
                 case keepDirs settings of

app/ghcup/GHCup/OptParse/Install.hs

@@ -210,7 +210,7 @@ installOpts tool =
            )
           )
     <*> switch
-          (short 'f' <> long "force" <> help "Force install")
+          (short 'f' <> long "force" <> help "Force install (THIS IS UNSAFE, only use it in Dockerfiles or CI)")
  where
   setDefault = case tool of
     Nothing  -> False
@@ -421,20 +421,20 @@ install installCommand settings getAppState' runLogger = case installCommand of
 
               VLeft (V (AlreadyInstalled _ v, ())) -> do
                 runLogger $ logWarn $
-                  "GHC ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install ghc --force " <> prettyVer v <> "'"
+                  "GHC ver " <> prettyVer v <> " already installed, remove it first to reinstall"
                 pure ExitSuccess
               VLeft (V (AlreadyInstalled _ v)) -> do
                 runLogger $ logWarn $
-                  "GHC ver " <> prettyVer v <> " already installed; if you really want to reinstall it, you may want to run 'ghcup install ghc --force " <> prettyVer v <> "'"
+                  "GHC ver " <> prettyVer v <> " already installed, remove it first to reinstall"
                 pure ExitSuccess
 
               VLeft (V (DirNotEmpty fp)) -> do
-                runLogger $ logWarn $
-                  "Install directory " <> T.pack fp <> " is not empty. Use 'ghcup install ghc --isolate " <> T.pack fp <> " --force ..." <> "' to install regardless."
+                runLogger $ logError $
+                  "Install directory " <> T.pack fp <> " is not empty."
                 pure $ ExitFailure 3
               VLeft (V (DirNotEmpty fp, ())) -> do
-                runLogger $ logWarn $
-                  "Install directory " <> T.pack fp <> " is not empty. Use 'ghcup install ghc --isolate " <> T.pack fp <> " --force ..." <> "' to install regardless."
+                runLogger $ logError $
+                  "Install directory " <> T.pack fp <> " is not empty."
                 pure $ ExitFailure 3
 
               VLeft err@(V (BuildFailed tmpdir _)) -> do