30 lines
545 B
Haskell
30 lines
545 B
Haskell
{- git versions
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-
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- Copyright 2011, 2013 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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module Git.Version (
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installed,
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older,
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normalize,
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GitVersion,
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) where
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import Common
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import Utility.DottedVersion
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type GitVersion = DottedVersion
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installed :: IO GitVersion
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installed = normalize . extract <$> readProcess "git" ["--version"]
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where
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extract s = case lines s of
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[] -> ""
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(l:_) -> unwords $ drop 2 $ words l
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older :: String -> IO Bool
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older n = do
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v <- installed
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return $ v < normalize n
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