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sha1_name: avoid unnecessary sha1 lookup in find_unique_abbrev

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An example where this happens is when doing an ls-tree on a tree that
contains a commit link. In that case, find_unique_abbrev is called
to get a non-abbreviated hex sha1, but still, a lookup is done as
to whether the sha1 is in the repository (which ends up looking for
a loose object in .git/objects), while the result of that lookup is
not used when returning a non-abbreviated hex sha1.

Signed-off-by: Mike Hommey <mh@glandium.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Mike Hommey 2014-11-26 19:12:47 +09:00 committed by Junio C Hamano
parent 2f93541d88
commit 61e704e38a
1 changed files with 1 additions and 1 deletions
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sha1_name.c
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@ -373,10 +373,10 @@ const char *find_unique_abbrev(const unsigned char *sha1, int len)
int status, exists;
static char hex[41];
exists = has_sha1_file(sha1);
memcpy(hex, sha1_to_hex(sha1), 40);
if (len == 40 || !len)
return hex;
exists = has_sha1_file(sha1);
while (len < 40) {
unsigned char sha1_ret[20];
status = get_short_sha1(hex, len, sha1_ret, GET_SHA1_QUIETLY);