58 lines
1.7 KiB
Haskell
58 lines
1.7 KiB
Haskell
{- The current git repository.
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-
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- Copyright 2012 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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module Git.CurrentRepo where
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import System.Posix.Directory (changeWorkingDirectory)
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import System.Posix.Env (getEnv, unsetEnv)
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import Common
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import Git.Types
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import Git.Construct
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import qualified Git.Config
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{- Gets the current git repository.
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-
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- Honors GIT_DIR and GIT_WORK_TREE.
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- Both environment variables are unset, to avoid confusing other git
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- commands that also look at them. Instead, the Git module passes
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- --work-tree and --git-dir to git commands it runs.
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-
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- When GIT_WORK_TREE or core.worktree are set, changes the working
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- directory if necessary to ensure it is within the repository's work
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- tree. While not needed for git commands, this is useful for anything
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- else that looks for files in the worktree.
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-}
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get :: IO Repo
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get = do
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gd <- pathenv "GIT_DIR"
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r <- configure gd =<< maybe fromCwd fromPath gd
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wt <- maybe (Git.Config.workTree r) Just <$> pathenv "GIT_WORK_TREE"
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case wt of
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Nothing -> return r
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Just d -> do
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cwd <- getCurrentDirectory
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unless (d `dirContains` cwd) $
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changeWorkingDirectory d
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return $ addworktree wt r
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where
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pathenv s = do
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v <- getEnv s
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case v of
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Just d -> do
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unsetEnv s
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Just <$> absPath d
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Nothing -> return Nothing
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configure Nothing r = Git.Config.read r
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configure (Just d) r = do
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r' <- Git.Config.read r
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-- Let GIT_DIR override the default gitdir.
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return $ changelocation r' $
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Local { gitdir = d, worktree = worktree (location r') }
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addworktree w r = changelocation r $
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Local { gitdir = gitdir (location r), worktree = w }
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changelocation r l = r { location = l }
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