237 lines
6.4 KiB
Haskell
237 lines
6.4 KiB
Haskell
{- Construction of Git Repo objects
|
|
-
|
|
- Copyright 2010-2012 Joey Hess <id@joeyh.name>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
{-# LANGUAGE CPP #-}
|
|
|
|
module Git.Construct (
|
|
fromCwd,
|
|
fromAbsPath,
|
|
fromPath,
|
|
fromUrl,
|
|
fromUnknown,
|
|
localToUrl,
|
|
remoteNamed,
|
|
remoteNamedFromKey,
|
|
fromRemotes,
|
|
fromRemoteLocation,
|
|
repoAbsPath,
|
|
newFrom,
|
|
checkForRepo,
|
|
) where
|
|
|
|
#ifndef mingw32_HOST_OS
|
|
import System.Posix.User
|
|
#endif
|
|
import qualified Data.Map as M hiding (map, split)
|
|
import Network.URI
|
|
|
|
import Common
|
|
import Git.Types
|
|
import Git
|
|
import Git.Remote
|
|
import Git.FilePath
|
|
import qualified Git.Url as Url
|
|
import Utility.UserInfo
|
|
|
|
{- Finds the git repository used for the cwd, which may be in a parent
|
|
- directory. -}
|
|
fromCwd :: IO (Maybe Repo)
|
|
fromCwd = getCurrentDirectory >>= seekUp
|
|
where
|
|
seekUp dir = do
|
|
r <- checkForRepo dir
|
|
case r of
|
|
Nothing -> case upFrom dir of
|
|
Nothing -> return Nothing
|
|
Just d -> seekUp d
|
|
Just loc -> Just <$> newFrom loc
|
|
|
|
{- Local Repo constructor, accepts a relative or absolute path. -}
|
|
fromPath :: FilePath -> IO Repo
|
|
fromPath dir = fromAbsPath =<< absPath dir
|
|
|
|
{- Local Repo constructor, requires an absolute path to the repo be
|
|
- specified. -}
|
|
fromAbsPath :: FilePath -> IO Repo
|
|
fromAbsPath dir
|
|
| absoluteGitPath dir = ifM (doesDirectoryExist dir') ( ret dir' , hunt )
|
|
| otherwise =
|
|
error $ "internal error, " ++ dir ++ " is not absolute"
|
|
where
|
|
ret = newFrom . LocalUnknown
|
|
{- Git always looks for "dir.git" in preference to
|
|
- to "dir", even if dir ends in a "/". -}
|
|
canondir = dropTrailingPathSeparator dir
|
|
dir' = canondir ++ ".git"
|
|
{- When dir == "foo/.git", git looks for "foo/.git/.git",
|
|
- and failing that, uses "foo" as the repository. -}
|
|
hunt
|
|
| (pathSeparator:".git") `isSuffixOf` canondir =
|
|
ifM (doesDirectoryExist $ dir </> ".git")
|
|
( ret dir
|
|
, ret $ takeDirectory canondir
|
|
)
|
|
| otherwise = ret dir
|
|
|
|
{- Remote Repo constructor. Throws exception on invalid url.
|
|
-
|
|
- Git is somewhat forgiving about urls to repositories, allowing
|
|
- eg spaces that are not normally allowed unescaped in urls.
|
|
-}
|
|
fromUrl :: String -> IO Repo
|
|
fromUrl url
|
|
| not (isURI url) = fromUrlStrict $ escapeURIString isUnescapedInURI url
|
|
| otherwise = fromUrlStrict url
|
|
|
|
fromUrlStrict :: String -> IO Repo
|
|
fromUrlStrict url
|
|
| startswith "file://" url = fromAbsPath $ unEscapeString $ uriPath u
|
|
| otherwise = newFrom $ Url u
|
|
where
|
|
u = fromMaybe bad $ parseURI url
|
|
bad = error $ "bad url " ++ url
|
|
|
|
{- Creates a repo that has an unknown location. -}
|
|
fromUnknown :: IO Repo
|
|
fromUnknown = newFrom Unknown
|
|
|
|
{- Converts a local Repo into a remote repo, using the reference repo
|
|
- which is assumed to be on the same host. -}
|
|
localToUrl :: Repo -> Repo -> Repo
|
|
localToUrl reference r
|
|
| not $ repoIsUrl reference = error "internal error; reference repo not url"
|
|
| repoIsUrl r = r
|
|
| otherwise = case Url.authority reference of
|
|
Nothing -> r
|
|
Just auth ->
|
|
let absurl = concat
|
|
[ Url.scheme reference
|
|
, "//"
|
|
, auth
|
|
, repoPath r
|
|
]
|
|
in r { location = Url $ fromJust $ parseURI absurl }
|
|
|
|
{- Calculates a list of a repo's configured remotes, by parsing its config. -}
|
|
fromRemotes :: Repo -> IO [Repo]
|
|
fromRemotes repo = mapM construct remotepairs
|
|
where
|
|
filterconfig f = filter f $ M.toList $ config repo
|
|
filterkeys f = filterconfig (\(k,_) -> f k)
|
|
remotepairs = filterkeys isremote
|
|
isremote k = startswith "remote." k && endswith ".url" k
|
|
construct (k,v) = remoteNamedFromKey k $ fromRemoteLocation v repo
|
|
|
|
{- Sets the name of a remote when constructing the Repo to represent it. -}
|
|
remoteNamed :: String -> IO Repo -> IO Repo
|
|
remoteNamed n constructor = do
|
|
r <- constructor
|
|
return $ r { remoteName = Just n }
|
|
|
|
{- Sets the name of a remote based on the git config key, such as
|
|
- "remote.foo.url". -}
|
|
remoteNamedFromKey :: String -> IO Repo -> IO Repo
|
|
remoteNamedFromKey k = remoteNamed basename
|
|
where
|
|
basename = intercalate "." $
|
|
reverse $ drop 1 $ reverse $ drop 1 $ split "." k
|
|
|
|
{- Constructs a new Repo for one of a Repo's remotes using a given
|
|
- location (ie, an url). -}
|
|
fromRemoteLocation :: String -> Repo -> IO Repo
|
|
fromRemoteLocation s repo = gen $ parseRemoteLocation s repo
|
|
where
|
|
gen (RemotePath p) = fromRemotePath p repo
|
|
gen (RemoteUrl u) = fromUrl u
|
|
|
|
{- Constructs a Repo from the path specified in the git remotes of
|
|
- another Repo. -}
|
|
fromRemotePath :: FilePath -> Repo -> IO Repo
|
|
fromRemotePath dir repo = do
|
|
dir' <- expandTilde dir
|
|
fromPath $ repoPath repo </> dir'
|
|
|
|
{- Git remotes can have a directory that is specified relative
|
|
- to the user's home directory, or that contains tilde expansions.
|
|
- This converts such a directory to an absolute path.
|
|
- Note that it has to run on the system where the remote is.
|
|
-}
|
|
repoAbsPath :: FilePath -> IO FilePath
|
|
repoAbsPath d = do
|
|
d' <- expandTilde d
|
|
h <- myHomeDir
|
|
return $ h </> d'
|
|
|
|
expandTilde :: FilePath -> IO FilePath
|
|
#ifdef mingw32_HOST_OS
|
|
expandTilde = return
|
|
#else
|
|
expandTilde = expandt True
|
|
where
|
|
expandt _ [] = return ""
|
|
expandt _ ('/':cs) = do
|
|
v <- expandt True cs
|
|
return ('/':v)
|
|
expandt True ('~':'/':cs) = do
|
|
h <- myHomeDir
|
|
return $ h </> cs
|
|
expandt True ('~':cs) = do
|
|
let (name, rest) = findname "" cs
|
|
u <- getUserEntryForName name
|
|
return $ homeDirectory u </> rest
|
|
expandt _ (c:cs) = do
|
|
v <- expandt False cs
|
|
return (c:v)
|
|
findname n [] = (n, "")
|
|
findname n (c:cs)
|
|
| c == '/' = (n, cs)
|
|
| otherwise = findname (n++[c]) cs
|
|
#endif
|
|
|
|
{- Checks if a git repository exists in a directory. Does not find
|
|
- git repositories in parent directories. -}
|
|
checkForRepo :: FilePath -> IO (Maybe RepoLocation)
|
|
checkForRepo dir =
|
|
check isRepo $
|
|
check gitDirFile $
|
|
check isBareRepo $
|
|
return Nothing
|
|
where
|
|
check test cont = maybe cont (return . Just) =<< test
|
|
checkdir c = ifM c
|
|
( return $ Just $ LocalUnknown dir
|
|
, return Nothing
|
|
)
|
|
isRepo = checkdir $ gitSignature $ ".git" </> "config"
|
|
isBareRepo = checkdir $ gitSignature "config"
|
|
<&&> doesDirectoryExist (dir </> "objects")
|
|
gitDirFile = do
|
|
c <- firstLine <$>
|
|
catchDefaultIO "" (readFile $ dir </> ".git")
|
|
return $ if gitdirprefix `isPrefixOf` c
|
|
then Just $ Local
|
|
{ gitdir = absPathFrom dir $
|
|
drop (length gitdirprefix) c
|
|
, worktree = Just dir
|
|
}
|
|
else Nothing
|
|
where
|
|
gitdirprefix = "gitdir: "
|
|
gitSignature file = doesFileExist $ dir </> file
|
|
|
|
newFrom :: RepoLocation -> IO Repo
|
|
newFrom l = return Repo
|
|
{ location = l
|
|
, config = M.empty
|
|
, fullconfig = M.empty
|
|
, remotes = []
|
|
, remoteName = Nothing
|
|
, gitEnv = Nothing
|
|
, gitGlobalOpts = []
|
|
}
|
|
|
|
|