4e0be2792b
Removed instance, got it all to build using fromRef. (With a few things that really need to show something using a ref for debugging stubbed out.) Then added back Read instance, and made Logs.View use it for serialization. This changes the view log format.
141 lines
3.9 KiB
Haskell
141 lines
3.9 KiB
Haskell
{- git repository handling
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-
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- This is written to be completely independant of git-annex and should be
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- suitable for other uses.
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-
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- Copyright 2010-2012 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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{-# LANGUAGE CPP #-}
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module Git (
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Repo(..),
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Ref(..),
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fromRef,
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Branch,
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Sha,
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Tag,
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repoIsUrl,
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repoIsSsh,
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repoIsHttp,
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repoIsLocal,
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repoIsLocalBare,
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repoIsLocalUnknown,
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repoDescribe,
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repoLocation,
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repoPath,
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localGitDir,
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attributes,
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hookPath,
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assertLocal,
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) where
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import Network.URI (uriPath, uriScheme, unEscapeString)
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#ifndef mingw32_HOST_OS
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import System.Posix.Files
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#endif
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import Common
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import Git.Types
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#ifndef mingw32_HOST_OS
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import Utility.FileMode
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#endif
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{- User-visible description of a git repo. -}
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repoDescribe :: Repo -> String
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repoDescribe Repo { remoteName = Just name } = name
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repoDescribe Repo { location = Url url } = show url
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repoDescribe Repo { location = Local { worktree = Just dir } } = dir
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repoDescribe Repo { location = Local { gitdir = dir } } = dir
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repoDescribe Repo { location = LocalUnknown dir } = dir
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repoDescribe Repo { location = Unknown } = "UNKNOWN"
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{- Location of the repo, either as a path or url. -}
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repoLocation :: Repo -> String
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repoLocation Repo { location = Url url } = show url
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repoLocation Repo { location = Local { worktree = Just dir } } = dir
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repoLocation Repo { location = Local { gitdir = dir } } = dir
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repoLocation Repo { location = LocalUnknown dir } = dir
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repoLocation Repo { location = Unknown } = undefined
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{- Path to a repository. For non-bare, this is the worktree, for bare,
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- it's the gitdir, and for URL repositories, is the path on the remote
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- host. -}
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repoPath :: Repo -> FilePath
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repoPath Repo { location = Url u } = unEscapeString $ uriPath u
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repoPath Repo { location = Local { worktree = Just d } } = d
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repoPath Repo { location = Local { gitdir = d } } = d
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repoPath Repo { location = LocalUnknown dir } = dir
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repoPath Repo { location = Unknown } = undefined
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{- Path to a local repository's .git directory. -}
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localGitDir :: Repo -> FilePath
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localGitDir Repo { location = Local { gitdir = d } } = d
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localGitDir _ = undefined
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{- Some code needs to vary between URL and normal repos,
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- or bare and non-bare, these functions help with that. -}
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repoIsUrl :: Repo -> Bool
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repoIsUrl Repo { location = Url _ } = True
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repoIsUrl _ = False
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repoIsSsh :: Repo -> Bool
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repoIsSsh Repo { location = Url url }
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| scheme == "ssh:" = True
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-- git treats these the same as ssh
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| scheme == "git+ssh:" = True
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| scheme == "ssh+git:" = True
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| otherwise = False
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where
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scheme = uriScheme url
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repoIsSsh _ = False
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repoIsHttp :: Repo -> Bool
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repoIsHttp Repo { location = Url url }
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| uriScheme url == "http:" = True
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| uriScheme url == "https:" = True
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| otherwise = False
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repoIsHttp _ = False
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repoIsLocal :: Repo -> Bool
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repoIsLocal Repo { location = Local { } } = True
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repoIsLocal _ = False
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repoIsLocalBare :: Repo -> Bool
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repoIsLocalBare Repo { location = Local { worktree = Nothing } } = True
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repoIsLocalBare _ = False
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repoIsLocalUnknown :: Repo -> Bool
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repoIsLocalUnknown Repo { location = LocalUnknown { } } = True
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repoIsLocalUnknown _ = False
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assertLocal :: Repo -> a -> a
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assertLocal repo action
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| repoIsUrl repo = error $ unwords
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[ "acting on non-local git repo"
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, repoDescribe repo
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, "not supported"
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]
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| otherwise = action
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{- Path to a repository's gitattributes file. -}
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attributes :: Repo -> FilePath
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attributes repo
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| repoIsLocalBare repo = repoPath repo ++ "/info/.gitattributes"
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| otherwise = repoPath repo ++ "/.gitattributes"
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{- Path to a given hook script in a repository, only if the hook exists
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- and is executable. -}
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hookPath :: String -> Repo -> IO (Maybe FilePath)
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hookPath script repo = do
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let hook = localGitDir repo </> "hooks" </> script
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ifM (catchBoolIO $ isexecutable hook)
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( return $ Just hook , return Nothing )
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where
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#if mingw32_HOST_OS
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isexecutable f = doesFileExist f
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#else
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isexecutable f = isExecutable . fileMode <$> getFileStatus f
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#endif
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