bdec7fed9c
Adds a dependency on filepath-bytestring, an as yet unreleased fork of filepath that operates on RawFilePath. Git.Repo also changed to use RawFilePath for the path to the repo. This does eliminate some RawFilePath -> FilePath -> RawFilePath conversions. And filepath-bytestring's </> is probably faster. But I don't expect a major performance improvement from this. This is mostly groundwork for making Annex.Location use RawFilePath, which will allow for a conversion-free pipleline.
85 lines
2.4 KiB
Haskell
85 lines
2.4 KiB
Haskell
{- The current git repository.
|
|
-
|
|
- Copyright 2012 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
module Git.CurrentRepo where
|
|
|
|
import Common
|
|
import Git.Types
|
|
import Git.Construct
|
|
import qualified Git.Config
|
|
import Utility.Env
|
|
import Utility.Env.Set
|
|
|
|
{- Gets the current git repository.
|
|
-
|
|
- Honors GIT_DIR and GIT_WORK_TREE.
|
|
- Both environment variables are unset, to avoid confusing other git
|
|
- commands that also look at them. Instead, the Git module passes
|
|
- --work-tree and --git-dir to git commands it runs.
|
|
-
|
|
- When GIT_WORK_TREE or core.worktree are set, changes the working
|
|
- directory if necessary to ensure it is within the repository's work
|
|
- tree. While not needed for git commands, this is useful for anything
|
|
- else that looks for files in the worktree.
|
|
-
|
|
- Also works around a git bug when running some hooks. It
|
|
- runs the hooks in the top of the repository, but if GIT_WORK_TREE
|
|
- was relative (but not "."), it then points to the wrong directory.
|
|
- In this situation GIT_PREFIX contains the directory that
|
|
- GIT_WORK_TREE is relative to.
|
|
-}
|
|
get :: IO Repo
|
|
get = do
|
|
gd <- getpathenv "GIT_DIR"
|
|
r <- configure gd =<< fromCwd
|
|
prefix <- getpathenv "GIT_PREFIX"
|
|
wt <- maybe (fromRawFilePath <$> worktree (location r)) Just
|
|
<$> getpathenvprefix "GIT_WORK_TREE" prefix
|
|
case wt of
|
|
Nothing -> return r
|
|
Just d -> do
|
|
curr <- getCurrentDirectory
|
|
unless (d `dirContains` curr) $
|
|
setCurrentDirectory d
|
|
return $ addworktree wt r
|
|
where
|
|
getpathenv s = do
|
|
v <- getEnv s
|
|
case v of
|
|
Just d -> do
|
|
unsetEnv s
|
|
return (Just d)
|
|
Nothing -> return Nothing
|
|
|
|
getpathenvprefix s (Just prefix) | not (null prefix) =
|
|
getpathenv s >>= \case
|
|
Nothing -> return Nothing
|
|
Just d
|
|
| d == "." -> return (Just d)
|
|
| otherwise -> Just <$> absPath (prefix </> d)
|
|
getpathenvprefix s _ = getpathenv s
|
|
|
|
configure Nothing (Just r) = Git.Config.read r
|
|
configure (Just d) _ = do
|
|
absd <- absPath d
|
|
curr <- getCurrentDirectory
|
|
r <- Git.Config.read $ newFrom $
|
|
Local
|
|
{ gitdir = toRawFilePath absd
|
|
, worktree = Just (toRawFilePath curr)
|
|
}
|
|
return $ if Git.Config.isBare r
|
|
then r { location = (location r) { worktree = Nothing } }
|
|
else r
|
|
|
|
configure Nothing Nothing = giveup "Not in a git repository."
|
|
|
|
addworktree w r = changelocation r $ Local
|
|
{ gitdir = gitdir (location r)
|
|
, worktree = fmap toRawFilePath w
|
|
}
|
|
changelocation r l = r { location = l }
|