48 lines
1 KiB
Haskell
48 lines
1 KiB
Haskell
{- git-union-merge program
|
|
-
|
|
- Copyright 2011 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
import System.Environment
|
|
import System.FilePath
|
|
import System.Directory
|
|
import Control.Monad (when)
|
|
|
|
import qualified Git.UnionMerge
|
|
import qualified Git
|
|
|
|
header :: String
|
|
header = "Usage: git-union-merge ref ref newref"
|
|
|
|
usage :: IO a
|
|
usage = error $ "bad parameters\n\n" ++ header
|
|
|
|
tmpIndex :: Git.Repo -> FilePath
|
|
tmpIndex g = Git.gitDir g </> "index.git-union-merge"
|
|
|
|
setup :: Git.Repo -> IO ()
|
|
setup g = cleanup g -- idempotency
|
|
|
|
cleanup :: Git.Repo -> IO ()
|
|
cleanup g = do
|
|
e' <- doesFileExist (tmpIndex g)
|
|
when e' $ removeFile (tmpIndex g)
|
|
|
|
parseArgs :: IO [String]
|
|
parseArgs = do
|
|
args <- getArgs
|
|
if length args /= 3
|
|
then usage
|
|
else return args
|
|
|
|
main :: IO ()
|
|
main = do
|
|
[aref, bref, newref] <- parseArgs
|
|
g <- Git.configRead =<< Git.repoFromCwd
|
|
_ <- Git.useIndex (tmpIndex g)
|
|
setup g
|
|
Git.UnionMerge.merge g [aref, bref]
|
|
Git.commit g "union merge" newref [aref, bref]
|
|
cleanup g
|