Aligns error reporting with the GNU standard

lambda-buffers-codegen/app/LambdaBuffers/Codegen/Cli/Gen.hs

@@ -42,11 +42,13 @@ data GenOpts = GenOpts
 
 makeLenses ''GenOpts
 
-logInfo :: String -> IO ()
-logInfo msg = putStrLn $ "[lbg][INFO] " <> msg <> "."
+logInfo :: FilePath -> String -> IO ()
+logInfo "" msg = putStrLn $ msg <> " [INFO]"
+logInfo fp msg = putStrLn $ fp <> ": " <> msg <> " [INFO]"
 
-logError :: String -> IO ()
-logError msg = putStrLn $ "[lbg][ERROR] " <> msg <> "."
+logError :: FilePath -> String -> IO ()
+logError "" msg = putStrLn $ msg <> " [ERROR]"
+logError fp msg = putStrLn $ fp <> ": " <> msg <> " [ERROR]"
 
 data Generated = Generated
   { _generatedFilePath :: FilePath
@@ -61,8 +63,8 @@ type Handler = (PC.CodegenInput -> Map (PC.InfoLess PC.ModuleName) (Either P.Err
 
 gen :: GenOpts -> Handler -> IO ()
 gen opts cont = do
-  logInfo $ "Codegen Input at " <> opts ^. inputFile
-  when (opts ^. debug) $ logInfo $ "Options received: " <> show opts
+  logInfo "" $ "Reading Codegen Input at " <> opts ^. inputFile
+  when (opts ^. debug) $ logInfo "" $ "Options received: " <> show opts
   ci <- readCodegenInput (opts ^. inputFile)
   ci' <- runFromProto (opts ^. outputFile) ci
   ci'' <- filterToRequestedClasses' opts ci'
@@ -73,11 +75,11 @@ gen opts cont = do
     then do
       writeCodegenResult (opts ^. outputFile)
       writePackageDeps (opts ^. genDir </> "build.json") allDeps
-      logInfo "Code generation successful"
+      logInfo (opts ^. inputFile) "Code generation successful"
     else do
       writeCodegenError (opts ^. outputFile) allErrors
-      logError "Code generation reported errors"
-  logInfo $ "Codegen Output at " <> opts ^. outputFile
+      logError (opts ^. inputFile) "Code generation failed"
+  logInfo "" $ "Writing Codegen Output at " <> opts ^. outputFile
 
 instance MonadFail (Either String) where
   fail = Left
@@ -90,7 +92,7 @@ filterToRequestedClasses' opts ci = do
       ( \cl -> do
           case Config.qClassNameFromText . Text.pack $ cl of
             Left err -> do
-              logError err
+              logError "" err
               exitFailure
             Right qcn -> return qcn
       )
@@ -104,10 +106,10 @@ filterToRequestedClasses reqCls ci =
     requestedClasses' = PC.classClosure ciClassRels reqCls
    in
     do
-      logInfo $ "Computed class closure: " <> unwords (Text.unpack . Config.qClassNameToText <$> toList reqCls)
+      logInfo "" $ "Computed class closure: " <> unwords (Text.unpack . Config.qClassNameToText <$> toList reqCls)
       unless (null (reqCls `Set.difference` ciQClassNames)) $ do
-        logError $
-          "Requested to print classes that are not available in the provided context."
+        logError "" $
+          "Requested to print implementations for classes that are not available in the provided context (HINT: Import the module where the type class is defined)."
             <> "\nClasses requested: "
             <> unwords (Text.unpack . Config.qClassNameToText <$> toList reqCls)
             <> "\nClasses available: "
@@ -130,13 +132,13 @@ collectErrorsAndDeps opts res = do
     ( \(mn, errOrPrint) (errs, deps) -> do
         case errOrPrint of
           Left err -> do
-            logInfo $
+            logInfo (opts ^. inputFile) $
               "Code generation failed for module "
                 <> PC.withInfoLess mn (show . PC.prettyModuleName)
             return (err : errs, deps)
           Right gend -> do
             writeFileAndCreate (opts ^. genDir </> (gend ^. generatedFilePath)) (gend ^. generatedCode)
-            logInfo $
+            logInfo (opts ^. inputFile) $
               "Code generation succeeded for module "
                 <> PC.withInfoLess mn (show . PC.prettyModuleName)
                 <> " at file path "
@@ -150,7 +152,7 @@ runFromProto :: FilePath -> P.Input -> IO PC.CodegenInput
 runFromProto ofp ci = case PC.codegenInputFromProto ci of
   Left err -> do
     writeCodegenError ofp [err]
-    logError $ "Code generation failed due to problems with the input file, inspect the error in " <> ofp <> " to find out the details"
+    logError "" $ "Code generation failed due to problems with the input file, inspect the error in " <> ofp <> " to find out the details"
     exitFailure
   Right ci' -> return ci'
 
@@ -177,7 +179,7 @@ readCodegenInput fp = do
       content <- LText.readFile fp
       return $ PbText.readMessageOrDie content
     _ -> do
-      logError $ "Unknown Codegen Input format (wanted .pb or .textproto) " <> ext
+      logError "" $ "Unknown Codegen Input format, wanted .pb or .textproto but got " <> ext <> " (" <> fp <> ")"
       exitFailure
 
 writeCodegenError :: FilePath -> [P.Error] -> IO ()
@@ -193,7 +195,7 @@ writeCodegenOutput fp cr = do
     ".pb" -> BS.writeFile fp (Pb.encodeMessage cr)
     ".textproto" -> Text.writeFile fp (Text.pack . show $ PbText.pprintMessage cr)
     _ -> do
-      logError $ "Unknown Codegen Output format (wanted .pb or .textproto) " <> ext
+      logError "" $ "Unknown Codegen Output format, wanted .pb or .textproto but got " <> ext <> " (" <> fp <> ")"
       exitFailure
 
 writePackageDeps :: FilePath -> Set Text -> IO ()

lambda-buffers-codegen/app/LambdaBuffers/Codegen/Cli/GenHaskell.hs

@@ -38,12 +38,12 @@ readHaskellConfig f = do
   unless
     fExists
     ( do
-        logError $ "Provided Haskell Codegen configuration file doesn't exists: " <> f
+        logError "" $ "Provided Haskell Codegen configuration file doesn't exists: " <> f
         exitFailure
     )
   mayCfg <- decodeFileStrict' f
   case mayCfg of
     Nothing -> do
-      logError $ "Invalid Haskell configuration file " <> f
+      logError "" $ "Invalid Haskell configuration file " <> f
       exitFailure
     Just cfg -> return cfg

lambda-buffers-codegen/app/LambdaBuffers/Codegen/Cli/GenPlutarch.hs

@@ -21,7 +21,7 @@ gen :: GenOpts -> IO ()
 gen opts = do
   cfg <- case opts ^. config of
     [] -> do
-      logError "No Plutarch configuration file given"
+      logError "" "No Plutarch configuration file given"
       exitFailure
     fps -> do
       cfgs <- traverse readPlutarchConfig fps
@@ -37,12 +37,12 @@ readPlutarchConfig f = do
   unless
     fExists
     ( do
-        logError $ "Provided Plutarch Codegen configuration file doesn't exists: " <> f
+        logError "" $ "Provided Plutarch Codegen configuration file doesn't exists: " <> f
         exitFailure
     )
   mayCfg <- decodeFileStrict' f
   case mayCfg of
     Nothing -> do
-      logError $ "Invalid Plutarch configuration file " <> f
+      logError "" $ "Invalid Plutarch configuration file " <> f
       exitFailure
     Just cfg -> return cfg

lambda-buffers-codegen/app/LambdaBuffers/Codegen/Cli/GenPurescript.hs

@@ -38,12 +38,12 @@ readPurescriptConfig f = do
   unless
     fExists
     ( do
-        logError $ "Provided Purescript Codegen configuration file doesn't exists: " <> f
+        logError "" $ "Provided Purescript Codegen configuration file doesn't exists: " <> f
         exitFailure
     )
   mayCfg <- decodeFileStrict f
   case mayCfg of
     Nothing -> do
-      logError $ "Invalid Purescript configuration file " <> f
+      logError "" $ "Invalid Purescript configuration file " <> f
       exitFailure
     Just cfg -> return cfg

lambda-buffers-compiler/app/LambdaBuffers/Compiler/Cli/Compile.hs

@@ -20,24 +20,26 @@ data CompileOpts = CompileOpts
 
 makeLenses ''CompileOpts
 
-logInfo :: String -> IO ()
-logInfo msg = putStrLn $ "[lbc][INFO] " <> msg
+logInfo :: FilePath -> String -> IO ()
+logInfo "" msg = putStrLn $ msg <> " [INFO]"
+logInfo fp msg = putStrLn $ fp <> ": " <> msg <> " [INFO]"
 
-logError :: String -> IO ()
-logError msg = putStrLn $ "[lbc][ERROR] " <> msg
+logError :: FilePath -> String -> IO ()
+logError "" msg = putStrLn $ msg <> " [ERROR]"
+logError fp msg = putStrLn $ fp <> ": " <> msg <> " [ERROR]"
 
 -- | Compile LambdaBuffers modules
 compile :: CompileOpts -> IO ()
 compile opts = do
-  logInfo $ "Compiler input at " <> opts ^. input
+  logInfo "" $ "Reading Compiler Input from " <> (opts ^. input)
   compInp <- readCompilerInput (opts ^. input)
   let compOut = runCompiler compInp
   case compOut ^. maybe'error of
     Nothing -> do
-      logInfo "Compilation succeeded"
+      logInfo (opts ^. input) "Compilation succeeded"
     Just _ -> do
-      logError "Compilation failed"
-  logInfo $ "Compiler output at " <> opts ^. output
+      logError (opts ^. input) "Compilation failed"
+  logInfo "" $ "Writing Compiler Output at " <> (opts ^. output)
   writeCompilerOutput (opts ^. output) compOut
 
 readCompilerInput :: FilePath -> IO Input
@@ -51,7 +53,7 @@ readCompilerInput fp = do
       content <- Text.readFile fp
       return $ PbText.readMessageOrDie content
     _ -> do
-      logError $ "Unknown Compiler Input format (wanted .pb or .textproto) " <> ext
+      logError "" $ "Unknown Compiler Input format, wanted .pb or .textproto but got " <> ext <> " (" <> fp <> ")"
       exitFailure
 
 writeCompilerOutput :: FilePath -> Output -> IO ()
@@ -61,5 +63,5 @@ writeCompilerOutput fp cr = do
     ".pb" -> BS.writeFile fp (Pb.encodeMessage cr)
     ".textproto" -> Text.writeFile fp (Text.pack . show $ PbText.pprintMessage cr)
     _ -> do
-      logError $ "Unknown Codegen Output format (wanted .pb or .textproto) " <> ext
+      logError "" $ "Unknown Codegen Input format, wanted .pb or .textproto but got " <> ext <> " (" <> fp <> ")"
       exitFailure

lambda-buffers-frontend/app/LambdaBuffers/Frontend/Cli/Build.hs

@@ -65,7 +65,7 @@ build opts = do
       mods <-
         either
           ( \e -> do
-              logError $ "Failed building Proto API modules: " <> show e
+              logError "" $ "Failed building Proto API modules: " <> show e
               exitFailure
           )
           return
@@ -75,9 +75,9 @@ build opts = do
         ( \tempDir -> do
             workDir <- getWorkDir opts tempDir
             _compRes <- callCompiler opts workDir (defMessage & Compiler.modules .~ mods)
-            logInfo "Compilation OK"
+            logInfo "" "Compilation OK"
             _cdgRes <- callCodegen opts workDir (Frontend.fres'requested res) (defMessage & Codegen.modules .~ mods)
-            logInfo "Codegen OK"
+            logInfo "" "Codegen OK"
         )
 
 getWorkDir :: BuildOpts -> FilePath -> IO FilePath
@@ -87,7 +87,7 @@ getWorkDir opts tempDir = do
   unless
     exists
     ( do
-        logError $ "Provided working directory " <> workDir <> " doesn't exist (did you forget to create it first?)"
+        logError "" $ "Provided working directory " <> workDir <> " doesn't exist (did you forget to create it first?)"
         exitFailure
     )
   return workDir
@@ -112,7 +112,7 @@ callCompiler opts workDir compInp = do
     then return $ compOut ^. Compiler.result
     else do
       let serrs = CompilerErrors.showErrors (compOut ^. Compiler.error)
-      for_ serrs logCompilerError
+      for_ serrs (logCompilerError lbcFp)
       exitFailure
 
 writeCompilerInput :: FilePath -> Compiler.Input -> IO ()
@@ -122,7 +122,7 @@ writeCompilerInput fp compInp = do
     ".pb" -> BS.writeFile fp (Pb.encodeMessage compInp)
     ".textproto" -> Text.writeFile fp (Text.pack . show $ PbText.pprintMessage compInp)
     _ -> do
-      logError $ "Unknown Compiler Input format (wanted .pb or .textproto) " <> ext
+      logError fp $ "Unknown Compiler Input format (wanted .pb or .textproto) " <> ext
       exitFailure
 
 readCompilerOutput :: FilePath -> IO Compiler.Output
@@ -133,30 +133,30 @@ readCompilerOutput fp = do
       content <- BS.readFile fp
       case Pb.decodeMessage content of
         Left err -> do
-          logError $ "Failed decoding the Compiler Output\n" <> err
+          logError fp $ "Failed decoding the Compiler Output\n" <> err
           exitFailure
         Right res -> return res
     ".textproto" -> do
       content <- LText.readFile fp
       return $ PbText.readMessageOrDie content
     _ -> do
-      logError $ "Unknown Compiler Output format (wanted .pb or .textproto) " <> ext
+      logError fp $ "Unknown Compiler Output format (wanted .pb or .textproto) " <> ext
       exitFailure
 
 call :: Bool -> FilePath -> [String] -> IO ()
 call dbg cliFp cliArgs = do
-  when dbg $ logInfo $ "Calling: " <> showCommandForUser cliFp cliArgs
+  when dbg $ logInfo "" $ "Calling: " <> showCommandForUser cliFp cliArgs
   (exitCode, stdOut, stdErr) <- readProcessWithExitCode cliFp cliArgs ""
   case exitCode of
     (ExitFailure _) -> do
-      logError $ "Error from:" <> showCommandForUser cliFp cliArgs
-      logError stdErr
-      logError stdOut
+      logError cliFp stdErr
+      logError cliFp stdOut
+      logError "" $ "Error from:" <> showCommandForUser cliFp cliArgs
       exitFailure
     _ -> do
-      when dbg $ logInfo stdOut
-      when dbg $ logInfo stdErr
-      logInfo $ "Success from: " <> showCommandForUser cliFp cliArgs
+      when (dbg && stdOut /= "") $ logInfo cliFp stdOut
+      when (dbg && stdErr /= "") $ logInfo cliFp stdErr
+      logInfo "" $ "Success from: " <> showCommandForUser cliFp cliArgs
       return ()
 
 callCodegen :: BuildOpts -> FilePath -> [Frontend.ModuleName ()] -> Codegen.Input -> IO Codegen.Result
@@ -184,7 +184,7 @@ callCodegen opts workDir requestedModules compInp = do
     then return $ compOut ^. Codegen.result
     else do
       let serrs = CodegenErrors.showErrors (compOut ^. Codegen.error)
-      for_ serrs logCodegenError
+      for_ serrs (logCodegenError lbgFp)
       exitFailure
 
 writeCodegenInput :: FilePath -> Codegen.Input -> IO ()
@@ -194,7 +194,7 @@ writeCodegenInput fp compInp = do
     ".pb" -> BS.writeFile fp (Pb.encodeMessage compInp)
     ".textproto" -> Text.writeFile fp (Text.pack . show $ PbText.pprintMessage compInp)
     _ -> do
-      logError $ "Unknown Codegen Input format (wanted .pb or .textproto) " <> ext
+      logError fp $ "Unknown Codegen Input format (wanted .pb or .textproto) " <> ext
       exitFailure
 
 readCodegenOutput :: FilePath -> IO Codegen.Output
@@ -205,12 +205,12 @@ readCodegenOutput fp = do
       content <- BS.readFile fp
       case Pb.decodeMessage content of
         Left err -> do
-          logError $ "Failed decoding the Codegen Output\n" <> err
+          logError fp $ "Failed decoding the Codegen Output\n" <> err
           exitFailure
         Right res -> return res
     ".textproto" -> do
       content <- LText.readFile fp
       return $ PbText.readMessageOrDie content
     _ -> do
-      logError $ "Unknown Codegen Output format (wanted .pb or .textproto) " <> ext
+      logError fp $ "Unknown Codegen Output format (wanted .pb or .textproto) " <> ext
       exitFailure

lambda-buffers-frontend/app/LambdaBuffers/Frontend/Cli/Env.hs

@@ -15,7 +15,7 @@ getLbcFromEnvironment = do
   mayLbc <- lookupEnv lbcVar
   maybe
     ( do
-        logError $ lbcVar <> " environment variable is missing"
+        logError "" $ lbcVar <> " environment variable is missing"
         exitFailure
     )
     return
@@ -26,7 +26,7 @@ getLbgFromEnvironment = do
   mayLbg <- lookupEnv lbgVar
   maybe
     ( do
-        logError $ lbgVar <> " environment variable is missing"
+        logError "" $ lbgVar <> " environment variable is missing"
         exitFailure
     )
     return