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bisect: check ancestors without forking a "git rev-list" process

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We must save the pending commits that will be used during revision
walking and unparse them after, because we want to leave a clean
state for the next revision walking that will try to find the best
bisection point.

As we don't fork a process anymore to call "git rev-list", we need
to remove the use of GIT_TRACE to check how "git rev-list" is
called from the t6030 test that uses it.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Christian Couder
2009-05-17 17:36:46 +02:00
committed by Junio C Hamano
parent 836a3fd5b0
commit 2d938fc7bc
2 changed files with 23 additions and 44 deletions
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54
bisect.c
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@ -750,42 +750,31 @@ static void check_merge_bases(void)
free_commit_list(result);
}
/*
* This function runs the command "git rev-list $_good ^$_bad"
* and returns 1 if it produces some output, 0 otherwise.
*/
static int check_ancestors(void)
static int check_ancestors(const char *prefix)
{
struct argv_array rev_argv = { NULL, 0, 0 };
struct strbuf str = STRBUF_INIT;
int i, result = 0;
struct child_process rls;
FILE *rls_fout;
struct rev_info revs;
struct object_array pending_copy;
int i, res;
argv_array_push(&rev_argv, xstrdup("rev-list"));
argv_array_push_sha1(&rev_argv, current_bad_sha1, "^%s");
for (i = 0; i < good_revs.sha1_nr; i++)
argv_array_push_sha1(&rev_argv, good_revs.sha1[i], "%s");
argv_array_push(&rev_argv, NULL);
bisect_rev_setup(&revs, prefix, "^%s", "%s", 0);
memset(&rls, 0, sizeof(rls));
rls.argv = rev_argv.argv;
rls.out = -1;
rls.git_cmd = 1;
if (start_command(&rls))
die("Could not launch 'git rev-list' command.");
rls_fout = fdopen(rls.out, "r");
while (strbuf_getline(&str, rls_fout, '\n') != EOF) {
strbuf_trim(&str);
if (*str.buf) {
result = 1;
break;
}
/* Save pending objects, so they can be cleaned up later. */
memset(&pending_copy, 0, sizeof(pending_copy));
for (i = 0; i < revs.pending.nr; i++)
add_object_array(revs.pending.objects[i].item,
revs.pending.objects[i].name,
&pending_copy);
bisect_common(&revs);
res = (revs.commits != NULL);
/* Clean up objects used, as they will be reused. */
for (i = 0; i < pending_copy.nr; i++) {
struct object *o = pending_copy.objects[i].item;
unparse_commit((struct commit *)o);
}
fclose(rls_fout);
finish_command(&rls);
return result;
return res;
}
/*
@ -813,7 +802,8 @@ static void check_good_are_ancestors_of_bad(const char *prefix)
if (good_revs.sha1_nr == 0)
return;
if (check_ancestors())
/* Check if all good revs are ancestor of the bad rev. */
if (check_ancestors(prefix))
check_merge_bases();
/* Create file BISECT_ANCESTORS_OK. */