Clarify stack postinstall message wrt #153

ghcup-0.0.5.yaml

@@ -2120,8 +2120,17 @@ ghcupDownloads:
         - old
       viChangeLog: https://github.com/commercialhaskell/stack/blob/master/ChangeLog.md#v251
       viPostInstall: &stack-post |
-        Stack manages GHC versions internally by default. In order to make it use ghcup installed GHC versions have a look at the options 'system-ghc', 'compiler-check' and 'compiler': https://docs.haskellstack.org/en/stable/yaml_configuration/#system-ghc
-        Additionally, you should upgrade stack only through ghcup.
+        Stack manages GHC versions internally by default. In order to make it use ghcup installed
+        GHC versions you can run the following commands:
+          stack config set install-ghc false --global
+          stack config set system-ghc  true  --global
+        
+        On windows, you may find the following config options useful too:
+          skip-msys, extra-path, extra-include-dirs, extra-lib-dirs
+
+        Also check out: https://docs.haskellstack.org/en/stable/yaml_configuration
+
+        !!! Additionally, you should upgrade stack only through ghcup and not use 'stack upgrade' !!!
       viArch:
         A_64:
           Linux_UnknownLinux:

lib/GHCup/Utils/Logger.hs

@@ -20,6 +20,7 @@ import           GHCup.Utils.String.QQ
 import           Control.Monad
 import           Control.Monad.IO.Class
 import           Control.Monad.Logger
+import           Data.Char               ( ord )
 import           Prelude                 hiding ( appendFile )
 import           System.Console.Pretty
 import           System.FilePath
@@ -43,20 +44,33 @@ myLoggerT LoggerConfig {..} loggingt = runLoggingT loggingt mylogger
   mylogger :: Loc -> LogSource -> LogLevel -> LogStr -> IO ()
   mylogger _ _ level str' = do
     -- color output
+    let style' = case level of
+          LevelDebug   -> style Bold . color Blue
+          LevelInfo    -> style Bold . color Green
+          LevelWarn    -> style Bold . color Yellow
+          LevelError   -> style Bold . color Red
+          LevelOther _ -> id
     let l = case level of
-          LevelDebug   -> toLogStr (style Bold $ color Blue "[ Debug ]")
-          LevelInfo    -> toLogStr (style Bold $ color Green "[ Info  ]")
-          LevelWarn    -> toLogStr (style Bold $ color Yellow "[ Warn  ]")
-          LevelError   -> toLogStr (style Bold $ color Red "[ Error ]")
+          LevelDebug   -> toLogStr (style' "[ Debug ]")
+          LevelInfo    -> toLogStr (style' "[ Info  ]")
+          LevelWarn    -> toLogStr (style' "[ Warn  ]")
+          LevelError   -> toLogStr (style' "[ Error ]")
           LevelOther t -> toLogStr "[ " <> toLogStr t <> toLogStr " ]"
-    let out = fromLogStr (l <> toLogStr " " <> str' <> toLogStr "\n")
+    let strs = fmap toLogStr . B.split (fromIntegral $ ord '\n') . fromLogStr $ str'
+    let out = case strs of
+                [] -> B.empty
+                (x:xs) -> fromLogStr
+                  . foldr (\a b -> a <> toLogStr "\n" <> b) mempty
+                  . ((l <> toLogStr " " <> x) :)
+                  . fmap (\line' -> toLogStr (style' "[ ...   ] ") <> line' )
+                  $ xs
 
     when (lcPrintDebug || (not lcPrintDebug && (level /= LevelDebug)))
       $ colorOutter out
 
     -- raw output
     let lr = case level of
-          LevelDebug   -> toLogStr "Debug: "
+          LevelDebug   -> toLogStr "Debug:"
           LevelInfo    -> toLogStr "Info:"
           LevelWarn    -> toLogStr "Warn:"
           LevelError   -> toLogStr "Error:"