Avoid using 'lstat()' to figure out directories
If we have an up-to-date index entry for a file in that directory, we can know that the directories leading up to that file must be directories. No need to do an lstat() on the directory. Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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