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path: root/Build/DesktopFile.hs
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{- Generating and installing a desktop menu entry file and icon,
 - and a desktop autostart file. (And OSX equivilants.)
 -
 - Copyright 2012 Joey Hess <id@joeyh.name>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

{-# LANGUAGE CPP #-}
{-# OPTIONS_GHC -fno-warn-tabs #-}

module Build.DesktopFile where

import Utility.Exception
import Utility.FreeDesktop
import Utility.Path
import Utility.Monad
import Utility.Directory
import Config.Files
import Utility.OSX
import Assistant.Install.AutoStart
import Assistant.Install.Menu

import System.Environment
import System.PosixCompat.User
import Data.Maybe
import Control.Applicative
import Prelude

systemwideInstall :: IO Bool
#ifndef mingw32_HOST_OS 
systemwideInstall = isroot <||> destdirset
  where
	isroot = do
		uid <- fromIntegral <$> getRealUserID
		return $ uid == (0 :: Int)
	destdirset = isJust <$> catchMaybeIO (getEnv "DESTDIR")
#else
systemwideInstall = return False
#endif

inDestDir :: FilePath -> IO FilePath
inDestDir f = do
	destdir <- catchDefaultIO "" (getEnv "DESTDIR")
	return $ destdir ++ "/" ++ f

writeFDODesktop :: FilePath -> IO ()
writeFDODesktop command = do
	systemwide <- systemwideInstall

	datadir <- if systemwide then return systemDataDir else userDataDir
	menufile <- inDestDir (desktopMenuFilePath "git-annex" datadir)
	icondir <- inDestDir (iconDir datadir)
	installMenu command menufile "doc" icondir

	configdir <- if systemwide then return systemConfigDir else userConfigDir
	installAutoStart command 
		=<< inDestDir (autoStartPath "git-annex" configdir)

writeOSXDesktop :: FilePath -> IO ()
writeOSXDesktop command = do
	installAutoStart command =<< inDestDir =<< ifM systemwideInstall
		( return $ systemAutoStart osxAutoStartLabel
		, userAutoStart osxAutoStartLabel
		)

install :: FilePath -> IO ()
install command = do
#ifdef darwin_HOST_OS
	writeOSXDesktop command
#else
	writeFDODesktop command
#endif
	ifM systemwideInstall
		( return ()
		, do
			programfile <- inDestDir =<< programFile
			createDirectoryIfMissing True (parentDir programfile)
			writeFile programfile command
		)

installUser :: FilePath -> IO ()
installUser command = ifM systemwideInstall
	( return ()
	, install command
	)