From 102c300550cab9ac14b26e79ad6a560c02781743 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Roman=20Smr=C5=BE?= <roman.smrz@seznam.cz>
Date: Wed, 4 May 2022 21:35:57 +0200
Subject: Verbose option, otherwise hide most output

---
 src/Main.hs   |  7 ++++++-
 src/Output.hs | 49 +++++++++++++++++++++++++++++++++++--------------
 2 files changed, 41 insertions(+), 15 deletions(-)

diff --git a/src/Main.hs b/src/Main.hs
index 6cf5405..1a7e286 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -50,6 +50,7 @@ data Node = Node
 data Options = Options
     { optDefaultTool :: String
     , optProcTools :: [(ProcName, String)]
+    , optVerbose :: Bool
     , optTimeout :: Scientific
     , optGDB :: Bool
     }
@@ -58,6 +59,7 @@ defaultOptions :: Options
 defaultOptions = Options
     { optDefaultTool = ""
     , optProcTools = []
+    , optVerbose = False
     , optTimeout = 1
     , optGDB = False
     }
@@ -327,6 +329,9 @@ options =
                                    (pname, (_:path)) -> opts { optProcTools = (ProcName (T.pack pname), path) : optProcTools opts }
                 ) "PATH")
         "test tool to be used"
+    , Option ['v'] ["verbose"]
+        (NoArg (\opts -> opts { optVerbose = True }))
+        "show output of processes and successful tests"
     , Option ['t'] ["timeout"]
         (ReqArg (\str opts -> case readMaybe str of
                                    Just timeout -> opts { optTimeout = timeout }
@@ -348,5 +353,5 @@ main = do
 
     optDefaultTool opts `seq` return ()
 
-    out <- startOutput
+    out <- startOutput $ optVerbose opts
     forM_ files $ mapM_ (runTest out opts) <=< parseTestFile
diff --git a/src/Output.hs b/src/Output.hs
index 2c34a7d..0bf757a 100644
--- a/src/Output.hs
+++ b/src/Output.hs
@@ -20,7 +20,14 @@ import System.IO
 
 import Test
 
-data Output = Output { outState :: MVar OutputState }
+data Output = Output
+    { outState :: MVar OutputState
+    , outConfig :: OutputConfig
+    }
+
+data OutputConfig = OutputConfig
+    { outVerbose :: Bool
+    }
 
 data OutputState = OutputState
     { outCurPrompt :: Maybe Text
@@ -40,8 +47,10 @@ class MonadIO m => MonadOutput m where
 instance MonadIO m => MonadOutput (ReaderT Output m) where
     getOutput = ask
 
-startOutput :: IO Output
-startOutput =  Output <$> newMVar OutputState { outCurPrompt = Nothing }
+startOutput :: Bool -> IO Output
+startOutput verbose = Output
+    <$> newMVar OutputState { outCurPrompt = Nothing }
+    <*> pure OutputConfig { outVerbose = verbose }
 
 outColor :: OutputType -> Text
 outColor OutputChildStdout = T.pack "0"
@@ -61,6 +70,16 @@ outSign OutputMatch = T.pack "+"
 outSign OutputMatchFail = T.pack "/"
 outSign OutputError = T.pack "!!"
 
+printWhenQuiet :: OutputType -> Bool
+printWhenQuiet = \case
+    OutputChildStdout -> False
+    OutputChildStderr -> True
+    OutputChildInfo -> False
+    OutputChildFail -> True
+    OutputMatch -> False
+    OutputMatchFail -> True
+    OutputError -> True
+
 clearPrompt :: OutputState -> IO ()
 clearPrompt OutputState { outCurPrompt = Just _ } = T.putStr $ T.pack "\ESC[2K\r"
 clearPrompt _ = return ()
@@ -73,17 +92,19 @@ ioWithOutput :: MonadOutput m => (Output -> IO a) -> m a
 ioWithOutput act = liftIO . act =<< getOutput
 
 outLine :: MonadOutput m => OutputType -> Maybe ProcName -> Text -> m ()
-outLine otype mbproc line = ioWithOutput $ \out -> withMVar (outState out) $ \st -> do
-    clearPrompt st
-    TL.putStrLn $ TL.fromChunks
-        [ T.pack "\ESC[", outColor otype, T.pack "m"
-        , maybe T.empty textProcName mbproc
-        , outSign otype
-        , T.pack "> "
-        , line
-        , T.pack "\ESC[0m"
-        ]
-    showPrompt st
+outLine otype mbproc line = ioWithOutput $ \out ->
+    when (outVerbose (outConfig out) || printWhenQuiet otype) $ do
+        withMVar (outState out) $ \st -> do
+            clearPrompt st
+            TL.putStrLn $ TL.fromChunks
+                [ T.pack "\ESC[", outColor otype, T.pack "m"
+                , maybe T.empty textProcName mbproc
+                , outSign otype
+                , T.pack "> "
+                , line
+                , T.pack "\ESC[0m"
+                ]
+            showPrompt st
 
 outPrompt :: MonadOutput m => Text -> m ()
 outPrompt p = ioWithOutput $ \out -> modifyMVar_ (outState out) $ \st -> do
-- 
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