Merge branch 'mf/submodule-summary-with-correct-repository'

"git diff/show" on a change that involves a submodule used to read
the information on commits in the submodule from a wrong repository
and gave a wrong information when the commit-graph is involved.

* mf/submodule-summary-with-correct-repository:
  submodule: use submodule repository when preparing summary
  revision: use repository from rev_info when parsing commits

Author: gitster

commit.h

@@ -95,7 +95,6 @@ static inline int parse_commit_no_graph(struct commit *commit)
 
 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
 #define parse_commit_internal(item, quiet, use) repo_parse_commit_internal(the_repository, item, quiet, use)
-#define parse_commit_gently(item, quiet) repo_parse_commit_gently(the_repository, item, quiet)
 #define parse_commit(item) repo_parse_commit(the_repository, item)
 #endif
 

revision.c

@@ -440,7 +440,7 @@ static struct commit *handle_commit(struct rev_info *revs,
 	if (object->type == OBJ_COMMIT) {
 		struct commit *commit = (struct commit *)object;
 
-		if (parse_commit(commit) < 0)
+		if (repo_parse_commit(revs->repo, commit) < 0)
 			die("unable to parse commit %s", name);
 		if (flags & UNINTERESTING) {
 			mark_parents_uninteresting(commit);
@@ -1013,7 +1013,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
 					ts->treesame[0] = 1;
 			}
 		}
-		if (parse_commit(p) < 0)
+		if (repo_parse_commit(revs->repo, p) < 0)
 			die("cannot simplify commit %s (because of %s)",
 			    oid_to_hex(&commit->object.oid),
 			    oid_to_hex(&p->object.oid));
@@ -1058,7 +1058,7 @@ static void try_to_simplify_commit(struct rev_info *revs, struct commit *commit)
 				 * IOW, we pretend this parent is a
 				 * "root" commit.
 				 */
-				if (parse_commit(p) < 0)
+				if (repo_parse_commit(revs->repo, p) < 0)
 					die("cannot simplify commit %s (invalid %s)",
 					    oid_to_hex(&commit->object.oid),
 					    oid_to_hex(&p->object.oid));
@@ -1126,7 +1126,7 @@ static int process_parents(struct rev_info *revs, struct commit *commit,
 			parent = parent->next;
 			if (p)
 				p->object.flags |= UNINTERESTING;
-			if (parse_commit_gently(p, 1) < 0)
+			if (repo_parse_commit_gently(revs->repo, p, 1) < 0)
 				continue;
 			if (p->parents)
 				mark_parents_uninteresting(p);
@@ -1157,7 +1157,7 @@ static int process_parents(struct rev_info *revs, struct commit *commit,
 		struct commit *p = parent->item;
 		int gently = revs->ignore_missing_links ||
 			     revs->exclude_promisor_objects;
-		if (parse_commit_gently(p, gently) < 0) {
+		if (repo_parse_commit_gently(revs->repo, p, gently) < 0) {
 			if (revs->exclude_promisor_objects &&
 			    is_promisor_object(&p->object.oid)) {
 				if (revs->first_parent_only)
@@ -3337,7 +3337,7 @@ static void explore_walk_step(struct rev_info *revs)
 	if (!c)
 		return;
 
-	if (parse_commit_gently(c, 1) < 0)
+	if (repo_parse_commit_gently(revs->repo, c, 1) < 0)
 		return;
 
 	if (revs->sort_order == REV_SORT_BY_AUTHOR_DATE)
@@ -3375,7 +3375,7 @@ static void indegree_walk_step(struct rev_info *revs)
 	if (!c)
 		return;
 
-	if (parse_commit_gently(c, 1) < 0)
+	if (repo_parse_commit_gently(revs->repo, c, 1) < 0)
 		return;
 
 	explore_to_depth(revs, commit_graph_generation(c));
@@ -3457,7 +3457,7 @@ static void init_topo_walk(struct rev_info *revs)
 		struct commit *c = list->item;
 		uint32_t generation;
 
-		if (parse_commit_gently(c, 1))
+		if (repo_parse_commit_gently(revs->repo, c, 1))
 			continue;
 
 		test_flag_and_insert(&info->explore_queue, c, TOPO_WALK_EXPLORED);
@@ -3521,7 +3521,7 @@ static void expand_topo_walk(struct rev_info *revs, struct commit *commit)
 		if (parent->object.flags & UNINTERESTING)
 			continue;
 
-		if (parse_commit_gently(parent, 1) < 0)
+		if (repo_parse_commit_gently(revs->repo, parent, 1) < 0)
 			continue;
 
 		generation = commit_graph_generation(parent);

submodule.c

@@ -438,13 +438,14 @@ void handle_ignore_submodules_arg(struct diff_options *diffopt,
 	 */
 }
 
-static int prepare_submodule_diff_summary(struct rev_info *rev, const char *path,
-		struct commit *left, struct commit *right,
-		struct commit_list *merge_bases)
+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(the_repository, rev, NULL);
+	repo_init_revisions(r, rev, NULL);
 	setup_revisions(0, NULL, rev, NULL);
 	rev->left_right = 1;
 	rev->first_parent_only = 1;
@@ -632,7 +633,7 @@ void show_submodule_diff_summary(struct diff_options *o, const char *path,
 		goto out;
 
 	/* Treat revision walker failure the same as missing commits */
-	if (prepare_submodule_diff_summary(&rev, path, left, right, merge_bases)) {
+	if (prepare_submodule_diff_summary(sub, &rev, path, left, right, merge_bases)) {
 		diff_emit_submodule_error(o, "(revision walker failed)\n");
 		goto out;
 	}