73 lines
1.9 KiB
Haskell
73 lines
1.9 KiB
Haskell
{- git FilePath library
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-
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- Different git commands use different types of FilePaths to refer to
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- files in the repository. Some commands use paths relative to the
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- top of the repository even when run in a subdirectory. Adding some
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- types helps keep that straight.
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-
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- Copyright 2012-2013 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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{-# LANGUAGE CPP #-}
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module Git.FilePath (
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TopFilePath,
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fromTopFilePath,
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getTopFilePath,
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toTopFilePath,
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asTopFilePath,
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InternalGitPath,
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toInternalGitPath,
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fromInternalGitPath
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) where
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import Common
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import Git
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{- A FilePath, relative to the top of the git repository. -}
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newtype TopFilePath = TopFilePath { getTopFilePath :: FilePath }
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deriving (Show)
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{- Returns an absolute FilePath. -}
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fromTopFilePath :: TopFilePath -> Git.Repo -> FilePath
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fromTopFilePath p repo = absPathFrom (repoPath repo) (getTopFilePath p)
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{- The input FilePath can be absolute, or relative to the CWD. -}
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toTopFilePath :: FilePath -> Git.Repo -> IO TopFilePath
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toTopFilePath file repo = TopFilePath <$>
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relPathDirToFile (repoPath repo) <$> absPath file
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{- The input FilePath must already be relative to the top of the git
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- repository -}
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asTopFilePath :: FilePath -> TopFilePath
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asTopFilePath file = TopFilePath file
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{- Git may use a different representation of a path when storing
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- it internally.
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-
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- On Windows, git uses '/' to separate paths stored in the repository,
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- despite Windows using '\'. Also, git on windows dislikes paths starting
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- with "./" or ".\".
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-
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-}
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type InternalGitPath = String
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toInternalGitPath :: FilePath -> InternalGitPath
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#ifndef mingw32_HOST_OS
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toInternalGitPath = id
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#else
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toInternalGitPath p =
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let p' = replace "\\" "/" p
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in if "./" `isPrefixOf` p'
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then dropWhile (== '/') (drop 1 p')
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else p'
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#endif
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fromInternalGitPath :: InternalGitPath -> FilePath
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#ifndef mingw32_HOST_OS
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fromInternalGitPath = id
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#else
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fromInternalGitPath = replace "/" "\\"
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#endif
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