Fix a crash when merging files in the git-annex branch that contain invalid utf8.

The crash actually occurred when writing out the file, which was done to a
handle that had not had fileSystemEncoding applied to it.

Git/Command.hs

@@ -73,7 +73,7 @@ pipeReadStrict params repo = assertLocal repo $
 pipeWriteRead :: [CommandParam] -> String -> Repo -> IO String
 pipeWriteRead params s repo = assertLocal repo $
 	writeReadProcessEnv "git" (toCommand $ gitCommandLine params repo) 
-		(gitEnv repo) s
+		(gitEnv repo) s (Just fileEncoding)
 
 {- Runs a git subcommand, feeding it input on a handle with an action. -}
 pipeWrite :: [CommandParam] -> Repo -> (Handle -> IO ()) -> IO ()

Utility/Process.hs

@@ -64,17 +64,24 @@ readProcessEnv cmd args environ =
 			, env = environ
 			}
 
-{- Writes stdout to a process, returns its output, and also allows specifying
- - the environment. -}
+{- Writes a string to a process on its stdout, 
+ - returns its output, and also allows specifying the environment.
+ -
+ -
+ -}
 writeReadProcessEnv
 	:: FilePath
 	-> [String]
 	-> Maybe [(String, String)]
 	-> String
+	-> (Maybe (Handle -> IO ()))
 	-> IO String
-writeReadProcessEnv cmd args environ input = do
+writeReadProcessEnv cmd args environ input adjusthandle = do
 	(Just inh, Just outh, _, pid) <- createProcess p
 
+	maybe (return ()) (\a -> a inh) adjusthandle
+	maybe (return ()) (\a -> a outh) adjusthandle
+
 	-- fork off a thread to start consuming the output
 	output  <- hGetContents outh
 	outMVar <- newEmptyMVar

debian/changelog

@@ -13,6 +13,8 @@ git-annex (3.20121010) UNRELEASED; urgency=low
     their group, or even to disable syncing to them.
   * git config remote.name.annex-sync can be used to control whether
     a remote gets synced.
+  * Fix a crash when merging files in the git-annex branch that contain
+    invalid utf8.
 
  -- Joey Hess <joeyh@debian.org>  Wed, 10 Oct 2012 12:59:25 -0400
 

doc/bugs/error_when_using_repositories_with_non-ASCII_characters.mdwn

@@ -57,3 +57,6 @@ Using Ubuntu's original version (3.20120406) the error message is a bit differen
 > try to look at it again soon; the last 2 times I looked at that code
 > I could not see an easy way to make it allow invalid utf-8 encoded data.
 > --[[Joey]] 
+
+>> [[done]], although I am no longer so sure this was the last utf-8
+>> encoding bug.. --[[Joey]]