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rev-list: introduce --count option

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Add a --count option that, instead of actually listing the commits,
merely counts them.

This is mostly geared towards script use, and to this end it acts
specially when used with --left-right: it outputs the left and right
counts separately.  Previously, scripts would have to run a shell loop
or small inline script over to achieve the same.  (Without
--left-right, a simple |wc -l does the job.)

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Thomas Rast
2010-06-10 13:47:23 +02:00
committed by Junio C Hamano
parent 3499cb1ae7
commit f69c501832
5 changed files with 61 additions and 0 deletions
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16
builtin/rev-list.c
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@ -50,6 +50,15 @@ static void show_commit(struct commit *commit, void *data)
graph_show_commit(revs->graph);
if (revs->count) {
if (commit->object.flags & SYMMETRIC_LEFT)
revs->count_left++;
else
revs->count_right++;
finish_commit(commit, data);
return;
}
if (info->show_timestamp)
printf("%lu ", commit->date);
if (info->header_prefix)
@ -400,5 +409,12 @@ int cmd_rev_list(int argc, const char **argv, const char *prefix)
quiet ? finish_object : show_object,
&info);
if (revs.count) {
if (revs.left_right)
printf("%d\t%d\n", revs.count_left, revs.count_right);
else
printf("%d\n", revs.count_left + revs.count_right);
}
return 0;
}