97 lines
2.1 KiB
Haskell
97 lines
2.1 KiB
Haskell
{- git hooks
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-
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- Copyright 2013-2015 Joey Hess <id@joeyh.name>
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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.Hook where
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import Common
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import Git
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import Utility.Tmp
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#ifndef mingw32_HOST_OS
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import Utility.FileMode
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#endif
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data Hook = Hook
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{ hookName :: FilePath
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, hookScript :: String
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}
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deriving (Ord)
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instance Eq Hook where
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a == b = hookName a == hookName b
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hookFile :: Hook -> Repo -> FilePath
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hookFile h r = localGitDir r </> "hooks" </> hookName h
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{- Writes a hook. Returns False if the hook already exists with a different
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- content. -}
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hookWrite :: Hook -> Repo -> IO Bool
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hookWrite h r = do
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let f = hookFile h r
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ifM (doesFileExist f)
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( expectedContent h r
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, do
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viaTmp writeFile f (hookScript h)
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p <- getPermissions f
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setPermissions f $ p {executable = True}
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return True
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)
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{- Removes a hook. Returns False if the hook contained something else, and
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- could not be removed. -}
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hookUnWrite :: Hook -> Repo -> IO Bool
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hookUnWrite h r = do
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let f = hookFile h r
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ifM (doesFileExist f)
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( ifM (expectedContent h r)
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( do
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removeFile f
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return True
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, return False
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)
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, return True
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)
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expectedContent :: Hook -> Repo -> IO Bool
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expectedContent h r = do
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content <- readFile $ hookFile h r
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return $ content == hookScript h
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hookExists :: Hook -> Repo -> IO Bool
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hookExists h r = do
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let f = hookFile h r
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catchBoolIO $
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#ifndef mingw32_HOST_OS
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isExecutable . fileMode <$> getFileStatus f
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#else
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doesFileExist f
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#endif
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runHook :: Hook -> Repo -> IO Bool
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runHook h r = do
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let f = hookFile h r
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(c, ps) <- findcmd f
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boolSystem c ps
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where
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#ifndef mingw32_HOST_OS
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findcmd = defcmd
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#else
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{- Like msysgit, parse the first line of the hook file,
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- look for "#!", and dispatch the interpreter on the file. -}
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findcmd f = do
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l <- headMaybe . lines <$> catchDefaultIO "" (readFile f)
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case l of
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Just ('#':'!':rest) -> case words rest of
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[] -> defcmd f
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(c:ps) -> do
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let ps' = map Param (ps ++ [f])
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ok <- inPath c
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return (if ok then c else takeFileName c, ps')
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_ -> defcmd f
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#endif
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defcmd f = return (f, [])
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