87 lines
1.9 KiB
Haskell
87 lines
1.9 KiB
Haskell
{- git ls-tree interface
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-
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- Copyright 2011-2016 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 BangPatterns #-}
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module Git.LsTree (
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TreeItem(..),
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lsTree,
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lsTree',
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lsTreeParams,
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lsTreeFiles,
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parseLsTree,
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) where
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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 Git.FilePath
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import qualified Git.Filename
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import Numeric
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import Data.Char
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import System.Posix.Types
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data TreeItem = TreeItem
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{ mode :: FileMode
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, typeobj :: String
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, sha :: Ref
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, file :: TopFilePath
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} deriving Show
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{- Lists the complete contents of a tree, recursing into sub-trees,
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- with lazy output. -}
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lsTree :: Ref -> Repo -> IO ([TreeItem], IO Bool)
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lsTree = lsTree' []
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lsTree' :: [CommandParam] -> Ref -> Repo -> IO ([TreeItem], IO Bool)
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lsTree' ps t repo = do
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(l, cleanup) <- pipeNullSplit (lsTreeParams t ps) repo
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return (map parseLsTree l, cleanup)
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lsTreeParams :: Ref -> [CommandParam] -> [CommandParam]
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lsTreeParams r ps =
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[ Param "ls-tree"
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, Param "--full-tree"
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, Param "-z"
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, Param "-r"
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] ++ ps ++
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[ Param "--"
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, File $ fromRef r
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]
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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 =
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[ Param "ls-tree"
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, Param "--full-tree"
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, Param "-z"
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, Param "--"
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, File $ fromRef t
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] ++ map File fs
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{- Parses a line of ls-tree output, in format:
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- mode SP type SP sha TAB file
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-
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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 = smode
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, typeobj = t
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, sha = Ref s
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, file = sfile
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}
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where
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(m, past_m) = splitAt 7 l -- mode is 6 bytes
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(!t, past_t) = separate isSpace past_m
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(!s, past_s) = splitAt shaSize past_t
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!f = drop 1 past_s
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!smode = fst $ Prelude.head $ readOct m
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!sfile = asTopFilePath $ Git.Filename.decode f
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