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{- git check-attr interface
-
- Copyright 2010, 2011 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Git.CheckAttr where
import System.Exit
import Common
import Git
import qualified Git.Filename
{- Efficiently looks up a gitattributes value for each file in a list. -}
lookup :: String -> [FilePath] -> Repo -> IO [(FilePath, String)]
lookup attr files repo = do
-- git check-attr needs relative filenames input; it will choke
-- on some absolute filenames. This also means it will output
-- all relative filenames.
cwd <- getCurrentDirectory
let relfiles = map (relPathDirToFile cwd . absPathFrom cwd) files
(_, fromh, toh) <- hPipeBoth "git" (toCommand params)
_ <- forkProcess $ do
hClose fromh
hPutStr toh $ join "\0" relfiles
hClose toh
exitSuccess
hClose toh
(map topair . lines) <$> hGetContents fromh
where
params = gitCommandLine
[ Param "check-attr"
, Param attr
, Params "-z --stdin"
] repo
topair l = (file, value)
where
file = Git.Filename.decode $ join sep $ take end bits
value = bits !! end
end = length bits - 1
bits = split sep l
sep = ": " ++ attr ++ ": "
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