unannex improvements

Added files don't have to be committed before they can be unannexed.

unannex no longer commits existing staged changes

unannex of the last file in a directory now works, before it failed because
git rm deleted the directory out from under it,

Command/Unannex.hs

@@ -23,17 +23,8 @@ def = [command "unannex" paramPaths seek "undo accidential add command"]
 seek :: [CommandSeek]
 seek = [withFilesInGit $ whenAnnexed start]
 
-{- The unannex subcommand undoes an add. -}
 start :: FilePath -> (Key, Backend Annex) -> CommandStart
 start file (key, _) = stopUnless (inAnnex key) $ do
-	force <- Annex.getState Annex.force
-	unless force $ do
-		top <- fromRepo Git.workTree
-		staged <- inRepo $ LsFiles.staged [top]
-		unless (null staged) $
-			error "This command cannot be run when there are already files staged for commit."
-		Annex.changeState $ \s -> s { Annex.force = True }
-
 	showStart "unannex" file
 	next $ perform file key
 
@@ -43,9 +34,17 @@ perform file key = next $ cleanup file key
 cleanup :: FilePath -> Key -> CommandCleanup
 cleanup file key = do
 	liftIO $ removeFile file
-	inRepo $ Git.run "rm" [Params "--quiet --", File file]
-	-- git rm deletes empty directories; put them back
-	liftIO $ createDirectoryIfMissing True (parentDir file)
+	-- git rm deletes empty directory without --cached
+	inRepo $ Git.run "rm" [Params "--cached --quiet --", File file]
+	
+	-- If the file was already committed, it is now staged for removal.
+	-- Commit that removal now, to avoid later confusing the
+	-- pre-commit hook if this file is later added back to
+	-- git as a normal, non-annexed file.
+	whenM (not . null <$> inRepo (LsFiles.staged [file])) $ do
+		inRepo $ Git.run "commit" [
+			Param "-m", Param "content removed from git annex",
+			Param "--", File file]
 
 	fast <- Annex.getState Annex.fast
 	if fast
@@ -58,10 +57,5 @@ cleanup file key = do
 		else do
 			fromAnnex key file
 			logStatus key InfoMissing
-	
-	-- Commit staged changes at end to avoid confusing the
-	-- pre-commit hook if this file is later added back to
-	-- git as a normal, non-annexed file.
-	Annex.Queue.add "commit" [Param "-m", Param "content removed from git annex"] []
-	
+
 	return True

debian/changelog

@@ -7,6 +7,8 @@ git-annex (3.20111204) UNRELEASED; urgency=low
     yet added to git. Running the add again will now clean up this situtation.
   * Fix caching of decrypted ciphers, which failed when drop had to check
     multiple different encrypted special remotes.
+  * unannex: Can be run on files that have been added to the annex, but not
+    yet committed.
 
  -- Joey Hess <joeyh@debian.org>  Sun, 04 Dec 2011 12:22:37 -0400