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{- git-annex program path
-
- Copyright 2013 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
{-# LANGUAGE CPP #-}
module Annex.Path where
import Common
import Config.Files
import System.Environment
{- A fully qualified path to the currently running git-annex program.
-
- getExecutablePath is available since ghc 7.4.2. On OSs it supports
- well, it returns the complete path to the program. But, on other OSs,
- it might return just the basename. Fall back to reading the programFile,
- or searching for the command name in PATH.
-}
programPath :: IO FilePath
programPath = do
#if MIN_VERSION_base(4,6,0)
exe <- getExecutablePath
p <- if isAbsolute exe
then return exe
else readProgramFile
#else
p <- readProgramFile
#endif
maybe cannotFindProgram return =<< searchPath p
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