blob: 8209e5ba0c943bf9b5cb9b49be6215b520b6dffe (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
|
{- 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 Utility.Env
import System.Environment (getExecutablePath)
{- 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.
-
- The standalone build runs git-annex via ld.so, and defeats
- getExecutablePath. It sets GIT_ANNEX_PROGRAMPATH to the correct path
- to the wrapper script to use.
-}
programPath :: IO FilePath
programPath = go =<< getEnv "GIT_ANNEX_PROGRAMPATH"
where
go (Just p) = return p
go Nothing = 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
|
