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.
60 lines
1.7 KiB
Haskell
60 lines
1.7 KiB
Haskell
{- git index file stuff
|
|
-
|
|
- Copyright 2011-2018 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU AGPL version 3 or higher.
|
|
-}
|
|
|
|
module Git.Index where
|
|
|
|
import Common
|
|
import Git
|
|
import Utility.Env
|
|
import Utility.Env.Set
|
|
|
|
indexEnv :: String
|
|
indexEnv = "GIT_INDEX_FILE"
|
|
|
|
{- Gets value to set GIT_INDEX_FILE to. Input should be absolute path,
|
|
- or relative to the CWD.
|
|
-
|
|
- When relative, GIT_INDEX_FILE is interpreted by git as being
|
|
- relative to the top of the work tree of the git repository,
|
|
- not to the CWD. Worse, other environment variables (GIT_WORK_TREE)
|
|
- or git options (--work-tree) or configuration (core.worktree)
|
|
- can change what the relative path is interpreted relative to.
|
|
-
|
|
- So, an absolute path is the only safe option for this to return.
|
|
-}
|
|
indexEnvVal :: FilePath -> IO String
|
|
indexEnvVal = absPath
|
|
|
|
{- Forces git to use the specified index file.
|
|
-
|
|
- Returns an action that will reset back to the default
|
|
- index file.
|
|
-
|
|
- Warning: Not thread safe.
|
|
-}
|
|
override :: FilePath -> Repo -> IO (IO ())
|
|
override index _r = do
|
|
res <- getEnv var
|
|
val <- indexEnvVal index
|
|
setEnv var val True
|
|
return $ reset res
|
|
where
|
|
var = "GIT_INDEX_FILE"
|
|
reset (Just v) = setEnv indexEnv v True
|
|
reset _ = unsetEnv var
|
|
|
|
{- The normal index file. Does not check GIT_INDEX_FILE. -}
|
|
indexFile :: Repo -> FilePath
|
|
indexFile r = fromRawFilePath (localGitDir r) </> "index"
|
|
|
|
{- The index file git will currently use, checking GIT_INDEX_FILE. -}
|
|
currentIndexFile :: Repo -> IO FilePath
|
|
currentIndexFile r = fromMaybe (indexFile r) <$> getEnv indexEnv
|
|
|
|
{- Git locks the index by creating this file. -}
|
|
indexFileLock :: FilePath -> FilePath
|
|
indexFileLock f = f ++ ".lock"
|