91c4dcfc69
Fuzz tests have shown that git cat-file --batch sometimes stops running. It's not yet known why (no error message; repo seems ok). But this is something we can deal with in the CoProcess framework, since all 3 types of long-running git processes should be restartable if they fail. Note that, as implemented, only IO errors are caught. So an error thrown by the reveiver, when it sees something that is not valid output from git cat-file (etc) will not cause a restart. I don't want it to retry if git commands change their output or are just outputting garbage. This does mean that if the command did a partial output and crashed in the middle, it would still not be restarted. There is currently no guard against restarting a command repeatedly, if, for example, it crashes repeatedly on startup.
42 lines
1.1 KiB
Haskell
42 lines
1.1 KiB
Haskell
{- git hash-object interface
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-
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- Copyright 2011-2012 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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module Git.HashObject where
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import Common
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import Git
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import Git.Sha
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import Git.Command
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import Git.Types
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import qualified Utility.CoProcess as CoProcess
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type HashObjectHandle = CoProcess.CoProcessHandle
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hashObjectStart :: Repo -> IO HashObjectHandle
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hashObjectStart = CoProcess.rawMode <=< gitCoProcessStart True
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[ Param "hash-object"
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, Param "-w"
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, Param "--stdin-paths"
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]
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hashObjectStop :: HashObjectHandle -> IO ()
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hashObjectStop = CoProcess.stop
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{- Injects a file into git, returning the Sha of the object. -}
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hashFile :: HashObjectHandle -> FilePath -> IO Sha
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hashFile h file = CoProcess.query h send receive
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where
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send to = hPutStrLn to file
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receive from = getSha "hash-object" $ hGetLine from
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{- Injects some content into git, returning its Sha. -}
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hashObject :: ObjectType -> String -> Repo -> IO Sha
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hashObject objtype content repo = getSha subcmd $
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pipeWriteRead (map Param params) content repo
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where
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subcmd = "hash-object"
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params = [subcmd, "-t", show objtype, "-w", "--stdin"]
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