1 files changed, 32 insertions, 0 deletions
diff --git a/Git/Version.hs b/Git/Version.hs
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index 0000000..19ff945
--- /dev/null
+++ b/Git/Version.hs
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+{- git versions
+ -
+ - Copyright 2011, 2013 Joey Hess <id@joeyh.name>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+{-# OPTIONS_GHC -fno-warn-tabs #-}
+
+module Git.Version (
+	installed,
+	older,
+	normalize,
+	GitVersion,
+) where
+
+import Common
+import Utility.DottedVersion
+
+type GitVersion = DottedVersion
+
+installed :: IO GitVersion
+installed = normalize . extract <$> readProcess "git" ["--version"]
+  where
+	extract s = case lines s of
+		[] -> ""
+		(l:_) -> unwords $ drop 2 $ words l
+
+older :: String -> IO Bool
+older n = do
+	v <- installed
+	return $ v < normalize n