Move split source into src/ and lib/

1 files changed, 44 insertions, 0 deletions

diff --git a/src/CabalHelper/Compiletime/Log.hs b/src/CabalHelper/Compiletime/Log.hs
new file mode 100644
index 0000000..a75f8b7
--- /dev/null
+++ b/src/CabalHelper/Compiletime/Log.hs
@@ -0,0 +1,44 @@
+-- Copyright (C) 2017  Daniel Gröber <dxld ÄT darkboxed DOT org>
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU Affero General Public License for more details.
+--
+-- You should have received a copy of the GNU Affero General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+{-# LANGUAGE ScopedTypeVariables #-}
+
+{-|
+Module      : CabalHelper.Compiletime.Log
+Description : Basic logging facilities
+License     : AGPL-3
+-}
+
+module CabalHelper.Compiletime.Log where
+
+import Control.Monad
+import Control.Monad.IO.Class
+import Control.Exception as E
+import Data.String
+import System.IO
+import Prelude
+
+import CabalHelper.Compiletime.Types
+
+vLog :: MonadIO m => Options -> String -> m ()
+vLog Options { verbose = True } msg =
+    liftIO $ hPutStrLn stderr msg
+vLog _ _ = return ()
+
+logIOError :: Options -> String -> IO (Maybe a) -> IO (Maybe a)
+logIOError opts label a = do
+  a `E.catch` \(ex :: IOError) -> do
+      vLog opts $ label ++ ": " ++ show ex
+      return Nothing