60 lines
1.5 KiB
Haskell
60 lines
1.5 KiB
Haskell
{- git ls-tree interface
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-
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- Copyright 2011 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.LsTree (
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TreeItem(..),
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lsTree,
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lsTreeFiles,
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parseLsTree
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) where
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import Numeric
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import Control.Applicative
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import System.Posix.Types
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import Common
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import Git
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import Git.Command
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import Git.Sha
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import qualified Git.Filename
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data TreeItem = TreeItem
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{ mode :: FileMode
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, typeobj :: String
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, sha :: String
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, file :: FilePath
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} deriving Show
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{- Lists the complete contents of a tree, with lazy output. -}
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lsTree :: Ref -> Repo -> IO [TreeItem]
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lsTree t repo = map parseLsTree <$> pipeNullSplitZombie ps repo
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where
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ps = [Params "ls-tree --full-tree -z -r --", File $ show t]
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{- Lists specified files in a tree. -}
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lsTreeFiles :: Ref -> [FilePath] -> Repo -> IO [TreeItem]
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lsTreeFiles t fs repo = map parseLsTree <$> pipeNullSplitStrict ps repo
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where
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ps = [Params "ls-tree -z --", File $ show t] ++ map File fs
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{- Parses a line of ls-tree output.
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- (The --long format is not currently supported.) -}
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parseLsTree :: String -> TreeItem
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parseLsTree l = TreeItem
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{ mode = fst $ Prelude.head $ readOct m
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, typeobj = t
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, sha = s
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, file = Git.Filename.decode f
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}
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where
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-- l = <mode> SP <type> SP <sha> TAB <file>
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-- All fields are fixed, so we can pull them out of
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-- specific positions in the line.
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(m, past_m) = splitAt 7 l
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(t, past_t) = splitAt 4 past_m
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(s, past_s) = splitAt shaSize $ Prelude.tail past_t
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f = Prelude.tail past_s
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