urk, forgot to check this in yesterday!

Command/VFilter.hs

@@ -0,0 +1,30 @@
+{- git-annex command
+ -
+ - Copyright 2014 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Command.VFilter where
+
+import Common.Annex
+import Command
+import Annex.View
+import Command.View (paramView, parseViewParam, checkoutViewBranch)
+
+def :: [Command]
+def = [notBareRepo $ notDirect $
+	command "vfilter" paramView seek SectionMetaData "filter current view"]
+
+seek :: CommandSeek
+seek = withWords start
+
+start :: [String] -> CommandStart
+start params = do
+	showStart "vfilter" ""
+	withCurrentView $ \view -> do
+		let view' = filterView view $
+			map parseViewParam $ reverse params
+		next $ next $ if visibleViewSize view' > visibleViewSize view
+			then error "That would add an additional level of directory structure to the view, rather than filtering it. If you want to do that, use vadd instead of vfilter."
+			else checkoutViewBranch view' narrowView