Use release_revisions() on the the "struct rev_info" in
show_submodule_diff_summary() where we'd otherwise need to do the
equivalent of pre-initializing the "struct rev_info" with "{ 0 }" if
we were going to add it to the cleanup being performed in the "out"
part of the function, let's instead introduce an "out_no_rev" for the
reasons discussed in the preceding commit.
Doing so for the "goto" on "(!left || !right || !sub)" added in
8e6df65015f (submodule: refactor show_submodule_summary with helper
function, 2016-08-31) would have been straightforward, as in the
preceding commit.
But for the case of prepare_submodule_diff_summary() failing it's less
straightforward. Reading the pre-image we could simply retain the
"goto out" if it fails, because we can see that the first thing it
does is call repo_init_revisions().
But having a hard reliance on that would be a bit nasty, as we'd
potentially introduce a segfault if the function did some other
initialization first, and early aborted if that failed.
Let's just fold that helper function away into
show_submodule_diff_summary() itself, which was its only user. Now
following the flow of initialization is more obvious, and it's
immediately clear that the "goto out" if prepare_revision_walk()
returns non-zero is safe.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
submodule.c | 41 +++++++++++++++++------------------------
1 file changed, 17 insertions(+), 24 deletions(-)
diff --git a/submodule.c b/submodule.c
index 0510cb193b6..1dd61476307 100644
--- a/submodule.c
+++ b/submodule.c
@@ -477,28 +477,6 @@ void handle_ignore_submodules_arg(struct diff_options *diffopt,
*/
}
-static int prepare_submodule_diff_summary(struct repository *r, struct rev_info *rev,
- const char *path,
- struct commit *left, struct commit *right,
- struct commit_list *merge_bases)
-{
- struct commit_list *list;
-
- repo_init_revisions(r, rev, NULL);
- setup_revisions(0, NULL, rev, NULL);
- rev->left_right = 1;
- rev->first_parent_only = 1;
- left->object.flags |= SYMMETRIC_LEFT;
- add_pending_object(rev, &left->object, path);
- add_pending_object(rev, &right->object, path);
- for (list = merge_bases; list; list = list->next) {
- list->item->object.flags |= UNINTERESTING;
- add_pending_object(rev, &list->item->object,
- oid_to_hex(&list->item->object.oid));
- }
- return prepare_revision_walk(rev);
-}
-
static void print_submodule_diff_summary(struct repository *r, struct rev_info *rev, struct diff_options *o)
{
static const char format[] = " %m %s";
@@ -642,6 +620,7 @@ void show_submodule_diff_summary(struct diff_options *o, const char *path,
struct commit *left = NULL, *right = NULL;
struct commit_list *merge_bases = NULL;
struct repository *sub;
+ struct commit_list *list;
sub = open_submodule(path);
show_submodule_header(o, path, one, two, dirty_submodule,
@@ -653,10 +632,22 @@ void show_submodule_diff_summary(struct diff_options *o, const char *path,
* all the information the user needs.
*/
if (!left || !right || !sub)
- goto out;
+ goto out_no_rev;
+ repo_init_revisions(sub, &rev, NULL);
+ setup_revisions(0, NULL, &rev, NULL);
+ rev.left_right = 1;
+ rev.first_parent_only = 1;
+ left->object.flags |= SYMMETRIC_LEFT;
+ add_pending_object(&rev, &left->object, path);
+ add_pending_object(&rev, &right->object, path);
+ for (list = merge_bases; list; list = list->next) {
+ list->item->object.flags |= UNINTERESTING;
+ add_pending_object(&rev, &list->item->object,
+ oid_to_hex(&list->item->object.oid));
+ }
/* Treat revision walker failure the same as missing commits */
- if (prepare_submodule_diff_summary(sub, &rev, path, left, right, merge_bases)) {
+ if (prepare_revision_walk(&rev)) {
diff_emit_submodule_error(o, "(revision walker failed)\n");
goto out;
}
@@ -664,6 +655,8 @@ void show_submodule_diff_summary(struct diff_options *o, const char *path,
print_submodule_diff_summary(sub, &rev, o);
out:
+ release_revisions(&rev);
+out_no_rev:
if (merge_bases)
free_commit_list(merge_bases);
clear_commit_marks(left, ~0);
--
2.35.1.1509.ge4eeb5bd39e
