reinject: When the provided file doesn't match, leave it where it is, rather than moving to .git/annex/bad/

Command/Reinject.hs

@@ -35,8 +35,14 @@ start _ = error "specify a src file and a dest file"
 
 perform :: FilePath -> FilePath -> (Key, Backend) -> CommandPerform
 perform src _dest (key, backend) = do
-	unlessM move $ error "mv failed!"
-	next $ cleanup key backend
+	{- Check the content before accepting it. -}
+	ifM (Command.Fsck.checkKeySizeOr reject key src
+		<&&> Command.Fsck.checkBackendOr reject backend key src)
+		( do
+			unlessM move $ error "mv failed!"
+			next $ cleanup key
+		, error "not reinjecting"
+		)
 	where
 		-- the file might be on a different filesystem,
 		-- so mv is used rather than simply calling
@@ -44,13 +50,9 @@ perform src _dest (key, backend) = do
 		-- checked this way.
 		move = getViaTmp key $ \tmp ->
 			liftIO $ boolSystem "mv" [File src, File tmp]
+		reject = const $ return "wrong file?"
 
-cleanup :: Key -> Backend -> CommandCleanup
-cleanup key backend = do
+cleanup :: Key -> CommandCleanup
+cleanup key = do
 	logStatus key InfoPresent
-
-	-- fsck the new content
-	size_ok <- Command.Fsck.checkKeySize key
-	backend_ok <- Command.Fsck.checkBackend backend key
-
-	return $ size_ok && backend_ok
+	return True