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|
{- git hooks
-
- Copyright 2013 Joey Hess <joey@kitenet.net>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Git.Hook where
import Common
import Git
import Utility.Tmp
data Hook = Hook
{ hookName :: FilePath
, hookScript :: String
}
deriving (Ord)
instance Eq Hook where
a == b = hookName a == hookName b
hookFile :: Hook -> Repo -> FilePath
hookFile h r = localGitDir r </> "hooks" </> hookName h
{- Writes a hook. Returns False if the hook already exists with a different
- content. -}
hookWrite :: Hook -> Repo -> IO Bool
hookWrite h r = do
let f = hookFile h r
ifM (doesFileExist f)
( expectedContent h r
, do
viaTmp writeFile f (hookScript h)
p <- getPermissions f
setPermissions f $ p {executable = True}
return True
)
{- Removes a hook. Returns False if the hook contained something else, and
- could not be removed. -}
hookUnWrite :: Hook -> Repo -> IO Bool
hookUnWrite h r = do
let f = hookFile h r
ifM (doesFileExist f)
( ifM (expectedContent h r)
( do
removeFile f
return True
, return False
)
, return True
)
expectedContent :: Hook -> Repo -> IO Bool
expectedContent h r = do
content <- readFile $ hookFile h r
return $ content == hookScript h
|
