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|
{-# LANGUAGE FlexibleContexts #-}
-----------------------------------------------------------------------------
-- |
-- Module : Xmobar.Main
-- Copyright : (c) Andrea Rossato
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Jose A. Ortega Ruiz <jao@gnu.org>
-- Stability : unstable
-- Portability : unportable
--
-- The main module of Xmobar, a text based status bar
--
-----------------------------------------------------------------------------
module Main (main) where
import Data.List (intercalate)
import System.Environment (getArgs)
import Control.Monad (unless)
import System.Posix.Files (fileExist)
import Xmobar
import Xmobar.App.Main
import Xmobar.App.Opts
-- $main
-- | The main entry point
main :: IO ()
main = do
(o,file) <- getArgs >>= getOpts
(c,defaultings) <- case file of
[cfgfile] -> config cfgfile usage
_ -> defConfig usage
unless (null defaultings || notElem Debug o) $ putStrLn $
"Fields missing from config defaulted: " ++ intercalate "," defaultings
doOpts c o >>= xmobar
-- | Read default configuration file or load the default config
defConfig :: String -> IO (Config,[String])
defConfig msg = do
xdgConfigFile <- xmobarConfigFile
xdgConfigFileExists <- fileExist xdgConfigFile
if xdgConfigFileExists
then config xdgConfigFile msg
else return (defaultConfig,[])
config :: FilePath -> String -> IO (Config,[String])
config f msg = do
let err m = error $ f ++ ": " ++ m
file <- fileExist f
r <- if file
then readConfig defaultConfig f
else err $ "file not found" ++ "\n" ++ msg
case r of
Left e -> err (show e)
Right res -> return res
|
