WORM backend: Switched to include the relative path to the file inside the repository, rather than just the file's base name. Note that if you're relying on such things to keep files separate with WORM, you should really be using a better backend.

Backend/WORM.hs

@@ -12,6 +12,7 @@ import Types.Backend
 import Types.Key
 import Types.KeySource
 import Backend.Utilities
+import Git.FilePath
 
 backends :: [Backend]
 backends = [backend]
@@ -27,16 +28,13 @@ backend = Backend
 	}
 
 {- The key includes the file size, modification time, and the
- - basename of the filename.
- -
- - That allows multiple files with the same names to have different keys,
- - while also allowing a file to be moved around while retaining the
- - same key.
+ - original filename relative to the top of the git repository.
  -}
 keyValue :: KeySource -> Annex (Maybe Key)
 keyValue source = do
 	stat <- liftIO $ getFileStatus $ contentLocation source
-	n <- genKeyName $ takeFileName $ keyFilename source
+	relf <- getTopFilePath <$> inRepo (toTopFilePath $ keyFilename source)
+	n <- genKeyName relf
 	return $ Just $ stubKey
 		{ keyName = n
 		, keyBackendName = name backend

debian/changelog

@@ -16,6 +16,10 @@ git-annex (5.20140832) UNRELEASED; urgency=medium
     transfers.
   * sync: Ensure that pending changes to git-annex branch are committed
     when in direct mode. (Fixing a very minor reversion.)
+  * WORM backend: Switched to include the relative path to the file inside
+    the repository, rather than just the file's base name. Note that if you're
+    relying on such things to keep files separate with WORM, you should really
+    be using a better backend.
 
  -- Joey Hess <joeyh@debian.org>  Thu, 04 Sep 2014 16:17:22 -0400
 

doc/backends.mdwn

@@ -13,7 +13,7 @@ can use different ones for different files.
 * `SHA256` -- Does not include the file extension in the key, which can
   lead to better deduplication but can confuse some programs.
 * `WORM` ("Write Once, Read Many") This assumes that any file with
-  the same basename, size, and modification time has the same content.
+  the same filename, size, and modification time has the same content.
   This is the least expensive backend, recommended for really large
   files or slow systems.
 * `SHA512`, `SHA512E` -- Best SHA-2 hash, for the very paranoid.

doc/bugs/Possible_data-loss_if_WORM_keys_do_not_encode_relative_paths.mdwn

@@ -21,3 +21,4 @@ Instead of just using the basename, WORM keys could be kept stable by
 using the relative path and anchoring it to the root of the
 repository.
 
+> [[fixed|done]] --[[Joey]]