deal with Cygwin rsync paths issue

2 files changed, 36 insertions, 3 deletions

diff --git a/Utility/Path.hs b/Utility/Path.hs
index 2c2fc35ff..09cf739dc 100644
--- a/Utility/Path.hs
+++ b/Utility/Path.hs
@@ -17,6 +17,11 @@ import Data.List
 import Data.Maybe
 import Control.Applicative
 
+#ifdef __WINDOWS__
+import Data.Char
+import System.FilePath.Posix as Posix
+#endif
+
 import Utility.Monad
 import Utility.UserInfo
 
@@ -185,3 +190,22 @@ dotfile file
 	| otherwise = "." `isPrefixOf` f || dotfile (takeDirectory file)
   where
 	f = takeFileName file
+
+{- Converts a DOS style path to a Cygwin style path. Only on Windows.
+ - Any trailing '\' is preserved as a trailing '/' -}
+toCygPath :: FilePath -> FilePath
+#ifndef __WINDOWS__
+toCygPath = id
+#else
+toCygPath p
+	| null drive = recombine parts
+	| otherwise = recombine $ "/cygdrive" : driveletter drive : parts
+  where
+  	(drive, p') = splitDrive p
+	parts = splitDirectories p'
+  	driveletter = map toLower . takeWhile (/= ':')
+	recombine = fixtrailing . Posix.joinPath
+  	fixtrailing s
+		| hasTrailingPathSeparator p = Posix.addTrailingPathSeparator s
+		| otherwise = s
+#endif
diff --git a/Utility/Rsync.hs b/Utility/Rsync.hs
index 652da8b20..5f322a0cb 100644
--- a/Utility/Rsync.hs
+++ b/Utility/Rsync.hs
@@ -1,6 +1,6 @@
 {- various rsync stuff
  -
- - Copyright 2010-2012 Joey Hess <joey@kitenet.net>
+ - Copyright 2010-2013 Joey Hess <joey@kitenet.net>
  -
  - Licensed under the GNU GPL version 3 or higher.
  -}
@@ -49,7 +49,16 @@ rsyncUseDestinationPermissions :: CommandParam
 rsyncUseDestinationPermissions = Param "--chmod=ugo=rwX"
 
 rsync :: [CommandParam] -> IO Bool
-rsync = boolSystem "rsync"
+rsync = boolSystem "rsync" . rsyncParamsFixup
+
+{- On Windows, rsync is from Cygwin, and expects to get Cygwin formatted
+ - paths to files. (It thinks that C:foo refers to a host named "C").
+ - Fix up all Files in the Params appropriately. -}
+rsyncParamsFixup :: [CommandParam] -> [CommandParam]
+rsyncParamsFixup = map fixup
+  where
+  	fixup (File f) = File (toCygPath f)
+	fixup p = p
 
 {- Runs rsync, but intercepts its progress output and updates a meter.
  - The progress output is also output to stdout. 
@@ -65,7 +74,7 @@ rsyncProgress meterupdate params = do
 	reapZombies
 	return r
   where
-	p = proc "rsync" (toCommand params)
+	p = proc "rsync" (toCommand $ rsyncParamsFixup params)
 	feedprogress prev buf h = do
 		s <- hGetSomeString h 80
 		if null s