1ae780ee79
Note that GIT_WORK_TREE cannot influence GIT_DIR; that is necessary for git-fake-bare and vcsh type things to work.
48 lines
1.1 KiB
Haskell
48 lines
1.1 KiB
Haskell
{- git-union-merge program
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-
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- Copyright 2011 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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import System.Environment
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import Common
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import qualified Git.UnionMerge
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import qualified Git.Config
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import qualified Git.Construct
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import qualified Git.Branch
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import qualified Git.Index
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import qualified Git
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header :: String
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header = "Usage: git-union-merge ref ref newref"
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usage :: IO a
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usage = error $ "bad parameters\n\n" ++ header
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tmpIndex :: Git.Repo -> FilePath
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tmpIndex g = Git.gitDir g </> "index.git-union-merge"
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setup :: Git.Repo -> IO ()
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setup = cleanup -- idempotency
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cleanup :: Git.Repo -> IO ()
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cleanup g = whenM (doesFileExist $ tmpIndex g) $ removeFile $ tmpIndex g
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parseArgs :: IO [String]
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parseArgs = do
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args <- getArgs
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if length args /= 3
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then usage
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else return args
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main :: IO ()
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main = do
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[aref, bref, newref] <- map Git.Ref <$> parseArgs
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g <- Git.Config.read =<< Git.Construct.fromCurrent
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_ <- Git.Index.override $ tmpIndex g
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setup g
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Git.UnionMerge.merge aref bref g
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_ <- Git.Branch.commit "union merge" newref [aref, bref] g
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cleanup g
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