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rev-list: fix --reverse interaction with --parents

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--reverse did not interact well with --parents, as the included test
case shows: in a history like

  A--B.
   \   \
    `C--M--D

the command

  git rev-list --reverse --parents --full-history HEAD

erroneously lists D as having no parents at all.  (Without --reverse,
it correctly lists M.)

This is caused by the machinery driving --reverse: it first grabs all
commits through the normal routines, then runs them through the same
routines again, effectively simplifying them twice.

Fix this by moving the --reverse one level up, into get_revision().
This way we can cleanly grab all commits via the normal calls, then
just pop them off the list one by one without interfering with
get_revision_internal().

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
2008-08-29 21:18:38 +02:00
committed by Junio C Hamano
parent 6534703059
commit 498bcd3159
3 changed files with 60 additions and 21 deletions
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38
revision.c
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@ -1786,26 +1786,6 @@ static struct commit *get_revision_internal(struct rev_info *revs)
return c;
}
if (revs->reverse) {
int limit = -1;
if (0 <= revs->max_count) {
limit = revs->max_count;
if (0 < revs->skip_count)
limit += revs->skip_count;
}
l = NULL;
while ((c = get_revision_1(revs))) {
commit_list_insert(c, &l);
if ((0 < limit) && !--limit)
break;
}
revs->commits = l;
revs->reverse = 0;
revs->max_count = -1;
c = NULL;
}
/*
* Now pick up what they want to give us
*/
@ -1878,7 +1858,23 @@ static struct commit *get_revision_internal(struct rev_info *revs)
struct commit *get_revision(struct rev_info *revs)
{
struct commit *c = get_revision_internal(revs);
struct commit *c;
struct commit_list *reversed;
if (revs->reverse) {
reversed = NULL;
while ((c = get_revision_internal(revs))) {
commit_list_insert(c, &reversed);
}
revs->commits = reversed;
revs->reverse = 0;
revs->reverse_output_stage = 1;
}
if (revs->reverse_output_stage)
return pop_commit(&revs->commits);
c = get_revision_internal(revs);
if (c && revs->graph)
graph_update(revs->graph, c);
return c;