Make git-reset delete empty directories

When git-reset --hard is used and a subdirectory becomes
empty (as it contains no tracked files in the target tree)
the empty subdirectory should be removed.  This matches
the behavior of git-checkout-index and git-read-tree -m
which would not have created the subdirectory or would
have deleted it when updating the working directory.

Subdirectories which are not empty will be left behind.
This may happen if the subdirectory still contains object
files from the user's build process (for example).

[jc: simplified the logic a bit, while keeping the test script.]

1 files changed, 3 insertions, 0 deletions

diff --git a/git-reset.sh b/git-reset.sh
index fe53fc8065..6cb073cb16 100755
--- a/git-reset.sh
+++ b/git-reset.sh
@@ -88,6 +88,9 @@ case "$reset_type" in
 				# it is ok if this fails -- it may already
 				# have been culled by checkout-index.
 				unlink $_;
+				while (s|/[^/]*$||) {
+					rmdir($_) or last;
+				}
 			}
 		}
 	' $tmp-exists