From a4f3e112954e1b785c84c339bcbd83597a89335e Mon Sep 17 00:00:00 2001
From: Joey Hess <joeyh@debian.org>
Date: Tue, 3 Dec 2013 15:02:21 -0400
Subject: git-repair (1.20131203) unstable; urgency=low

  * Fix build deps. Closes: #731179

# imported from the archive
---
 Utility/Env.hs | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 Utility/Env.hs

(limited to 'Utility/Env.hs')

diff --git a/Utility/Env.hs b/Utility/Env.hs
new file mode 100644
index 0000000..cb73873
--- /dev/null
+++ b/Utility/Env.hs
@@ -0,0 +1,63 @@
+{- portable environment variables
+ -
+ - Copyright 2013 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+{-# LANGUAGE CPP #-}
+
+module Utility.Env where
+
+#ifdef mingw32_HOST_OS
+import Utility.Exception
+import Control.Applicative
+import Data.Maybe
+import qualified System.Environment as E
+#else
+import qualified System.Posix.Env as PE
+#endif
+
+getEnv :: String -> IO (Maybe String)
+#ifndef mingw32_HOST_OS
+getEnv = PE.getEnv
+#else
+getEnv = catchMaybeIO . E.getEnv
+#endif
+
+getEnvDefault :: String -> String -> IO String
+#ifndef mingw32_HOST_OS
+getEnvDefault = PE.getEnvDefault
+#else
+getEnvDefault var fallback = fromMaybe fallback <$> getEnv var
+#endif
+
+getEnvironment :: IO [(String, String)]
+#ifndef mingw32_HOST_OS
+getEnvironment = PE.getEnvironment
+#else
+getEnvironment = E.getEnvironment
+#endif
+
+{- Returns True if it could successfully set the environment variable.
+ -
+ - There is, apparently, no way to do this in Windows. Instead,
+ - environment varuables must be provided when running a new process. -}
+setEnv :: String -> String -> Bool -> IO Bool
+#ifndef mingw32_HOST_OS
+setEnv var val overwrite = do
+	PE.setEnv var val overwrite
+	return True
+#else
+setEnv _ _ _ = return False
+#endif
+
+{- Returns True if it could successfully unset the environment variable. -}
+unsetEnv :: String -> IO Bool
+#ifndef mingw32_HOST_OS
+unsetEnv var = do
+	PE.unsetEnv var
+	return True
+#else
+unsetEnv _ = return False
+#endif
-- 
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