681313dfd4
This fixes the bug. Note, it's only done when GIT_DIR is set. When it's not set, Git.Construct already handled it. This is why it was only noticed with this git submodule command. This commit was sponsored by Brett Eisenberg on Patreon.
84 lines
2.4 KiB
Haskell
84 lines
2.4 KiB
Haskell
{- The current git repository.
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-
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- Copyright 2012 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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module Git.CurrentRepo where
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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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import Utility.Env
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import Utility.Env.Set
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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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- Also works around a git bug when running some hooks. It
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- runs the hooks in the top of the repository, but if GIT_WORK_TREE
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- was relative (but not "."), it then points to the wrong directory.
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- In this situation GIT_PREFIX contains the directory that
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- GIT_WORK_TREE is relative to.
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-}
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get :: IO Repo
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get = do
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gd <- getpathenv "GIT_DIR"
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r <- configure gd =<< fromCwd
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prefix <- getpathenv "GIT_PREFIX"
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wt <- maybe (fromRawFilePath <$> worktree (location r)) Just
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<$> getpathenvprefix "GIT_WORK_TREE" prefix
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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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curr <- getCurrentDirectory
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unless (d `dirContains` curr) $
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setCurrentDirectory d
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return $ addworktree wt r
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where
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getpathenv 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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return (Just d)
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Nothing -> return Nothing
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getpathenvprefix s (Just prefix) | not (null prefix) =
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getpathenv s >>= \case
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Nothing -> return Nothing
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Just d
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| d == "." -> return (Just d)
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| otherwise -> Just <$> absPath (prefix </> d)
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getpathenvprefix s _ = getpathenv s
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configure Nothing (Just r) = Git.Config.read r
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configure (Just d) _ = do
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absd <- absPath d
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curr <- getCurrentDirectory
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loc <- adjustGitDirFile $ Local
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{ gitdir = toRawFilePath absd
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, worktree = Just (toRawFilePath curr)
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}
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r <- Git.Config.read $ newFrom loc
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return $ if Git.Config.isBare r
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then r { location = (location r) { worktree = Nothing } }
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else r
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configure Nothing Nothing = giveup "Not in a git repository."
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addworktree w r = changelocation r $ Local
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{ gitdir = gitdir (location r)
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, worktree = fmap toRawFilePath w
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}
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changelocation r l = r { location = l }
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