support pointer files

Backend.lookupFile is changed to always fall back to catKey when
operating on a file that's not a symlink.

catKey is changed to understand pointer files, as well as annex symlinks.

Before, catKey needed a file mode witness, to be sure it was looking at a
symlink. That was complicated stuff. Now, it doesn't actually care if a
file in git is a symlink or not; in either case asking git for the content
of the file will get the pointer to the key.

This does mean that git-annex will treat a link
foo -> WORM--bar as a git-annex file, and also treats
a regular file containing annex/objects/WORM--bar as a git-annex file.

Calling catKey could make git-annex commands need to do more work than
before. This would especially be the case if a repo contained many regular
files, and only a few annexed files, as now git-annex will need to ask
git about the contents of the regular files.

1 files changed, 1 insertions, 1 deletions

diff --git a/Command/Indirect.hs b/Command/Indirect.hs
index c12c91a48..f5234b4dc 100644
--- a/Command/Indirect.hs
+++ b/Command/Indirect.hs
@@ -76,7 +76,7 @@ perform = do
 						return Nothing
 				| otherwise -> 
 					maybe noop (fromdirect f)
-						=<< catKey sha mode
+						=<< catKey sha
 			_ -> noop
 	go _ = noop