83 lines
2.8 KiB
Haskell
83 lines
2.8 KiB
Haskell
{- running git commands
|
|
-
|
|
- Copyright 2010, 2011 Joey Hess <joey@kitenet.net>
|
|
-
|
|
- Licensed under the GNU GPL version 3 or higher.
|
|
-}
|
|
|
|
module Git.Command where
|
|
|
|
import qualified Data.Text.Lazy as L
|
|
import qualified Data.Text.Lazy.IO as L
|
|
import Control.Concurrent
|
|
import Control.Exception (finally)
|
|
|
|
import Common
|
|
import Git
|
|
import Git.Types
|
|
|
|
{- Constructs a git command line operating on the specified repo. -}
|
|
gitCommandLine :: [CommandParam] -> Repo -> [CommandParam]
|
|
gitCommandLine params repo@(Repo { location = Dir _ } ) =
|
|
-- force use of specified repo via --git-dir and --work-tree
|
|
[ Param ("--git-dir=" ++ gitDir repo)
|
|
, Param ("--work-tree=" ++ workTree repo)
|
|
] ++ params
|
|
gitCommandLine _ repo = assertLocal repo $ error "internal"
|
|
|
|
{- Runs git in the specified repo. -}
|
|
runBool :: String -> [CommandParam] -> Repo -> IO Bool
|
|
runBool subcommand params repo = assertLocal repo $
|
|
boolSystem "git" $ gitCommandLine (Param subcommand : params) repo
|
|
|
|
{- Runs git in the specified repo, throwing an error if it fails. -}
|
|
run :: String -> [CommandParam] -> Repo -> IO ()
|
|
run subcommand params repo = assertLocal repo $
|
|
unlessM (runBool subcommand params repo) $
|
|
error $ "git " ++ subcommand ++ " " ++ show params ++ " failed"
|
|
|
|
{- Runs a git subcommand and returns its output, lazily.
|
|
-
|
|
- Note that this leaves the git process running, and so zombies will
|
|
- result unless reap is called.
|
|
-}
|
|
pipeRead :: [CommandParam] -> Repo -> IO String
|
|
pipeRead params repo = assertLocal repo $ do
|
|
(_, h) <- hPipeFrom "git" $ toCommand $ gitCommandLine params repo
|
|
fileEncoding h
|
|
hGetContents h
|
|
|
|
{- Runs a git subcommand, feeding it input.
|
|
- You should call either getProcessStatus or forceSuccess on the PipeHandle. -}
|
|
pipeWrite :: [CommandParam] -> L.Text -> Repo -> IO PipeHandle
|
|
pipeWrite params s repo = assertLocal repo $ do
|
|
(p, h) <- hPipeTo "git" (toCommand $ gitCommandLine params repo)
|
|
L.hPutStr h s
|
|
hClose h
|
|
return p
|
|
|
|
{- Runs a git subcommand, feeding it input, and returning its output.
|
|
- You should call either getProcessStatus or forceSuccess on the PipeHandle. -}
|
|
pipeWriteRead :: [CommandParam] -> String -> Repo -> IO (PipeHandle, String)
|
|
pipeWriteRead params s repo = assertLocal repo $ do
|
|
(p, from, to) <- hPipeBoth "git" (toCommand $ gitCommandLine params repo)
|
|
fileEncoding to
|
|
fileEncoding from
|
|
_ <- forkIO $ finally (hPutStr to s) (hClose to)
|
|
c <- hGetContents from
|
|
return (p, c)
|
|
|
|
{- Reads null terminated output of a git command (as enabled by the -z
|
|
- parameter), and splits it. -}
|
|
pipeNullSplit :: [CommandParam] -> Repo -> IO [String]
|
|
pipeNullSplit params repo =
|
|
filter (not . null) . split sep <$> pipeRead params repo
|
|
where
|
|
sep = "\0"
|
|
|
|
{- Reaps any zombie git processes. -}
|
|
reap :: IO ()
|
|
reap = do
|
|
-- throws an exception when there are no child processes
|
|
r <- catchDefaultIO (getAnyProcessStatus False True) Nothing
|
|
maybe (return ()) (const reap) r
|