commit-reach: avoid is_descendant_of() shim

d91d6fbf26 (commit-reach: create repo_is_descendant_of(), 2020-06-17)
adds a repository aware version of is_descendant_of() and a backward
compatibility shim that is barely used.

Update all callers to directly use the new repo_is_descendant_of()
function instead; making the codebase simpler and pushing more
the_repository references higher up the stack.

Helped-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/pull.c

@@ -1025,7 +1025,8 @@ int cmd_pull(int argc, const char **argv, const char *prefix)
 			commit_list_insert(head, &list);
 			merge_head = lookup_commit_reference(the_repository,
 							     &merge_heads.oid[0]);
-			if (is_descendant_of(merge_head, list)) {
+			if (repo_is_descendant_of(the_repository,
+						  merge_head, list)) {
 				/* we can fast-forward this without invoking rebase */
 				opt_ff = "--ff-only";
 				ran_ff = 1;

commit-reach.c

@@ -283,9 +283,9 @@ struct commit_list *repo_get_merge_bases(struct repository *r,
 /*
  * Is "commit" a descendant of one of the elements on the "with_commit" list?
  */
-static int repo_is_descendant_of(struct repository *r,
-				 struct commit *commit,
-				 struct commit_list *with_commit)
+int repo_is_descendant_of(struct repository *r,
+			  struct commit *commit,
+			  struct commit_list *with_commit)
 {
 	if (!with_commit)
 		return 1;
@@ -310,11 +310,6 @@ static int repo_is_descendant_of(struct repository *r,
 	}
 }
 
-int is_descendant_of(struct commit *commit, struct commit_list *with_commit)
-{
-	return repo_is_descendant_of(the_repository, commit, with_commit);
-}
-
 /*
  * Is "commit" an ancestor of one of the "references"?
  */
@@ -432,7 +427,8 @@ int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid)
 		return 0;
 
 	commit_list_insert(old_commit, &old_commit_list);
-	return is_descendant_of(new_commit, old_commit_list);
+	return repo_is_descendant_of(the_repository,
+				    new_commit, old_commit_list);
 }
 
 /*
@@ -551,7 +547,7 @@ int commit_contains(struct ref_filter *filter, struct commit *commit,
 {
 	if (filter->with_commit_tag_algo)
 		return contains_tag_algo(commit, list, cache) == CONTAINS_YES;
-	return is_descendant_of(commit, list);
+	return repo_is_descendant_of(the_repository, commit, list);
 }
 
 static int compare_commits_by_gen(const void *_a, const void *_b)

commit-reach.h

@@ -27,7 +27,9 @@ struct commit_list *repo_get_merge_bases_many_dirty(struct repository *r,
 
 struct commit_list *get_octopus_merge_bases(struct commit_list *in);
 
-int is_descendant_of(struct commit *commit, struct commit_list *with_commit);
+int repo_is_descendant_of(struct repository *r,
+			  struct commit *commit,
+			  struct commit_list *with_commit);
 int repo_in_merge_bases(struct repository *r,
 			struct commit *commit,
 			struct commit *reference);

t/helper/test-reach.c

@@ -108,7 +108,7 @@ int cmd__reach(int ac, const char **av)
 	else if (!strcmp(av[1], "in_merge_bases"))
 		printf("%s(A,B):%d\n", av[1], in_merge_bases(A, B));
 	else if (!strcmp(av[1], "is_descendant_of"))
-		printf("%s(A,X):%d\n", av[1], is_descendant_of(A, X));
+		printf("%s(A,X):%d\n", av[1], repo_is_descendant_of(r, A, X));
 	else if (!strcmp(av[1], "get_merge_bases_many")) {
 		struct commit_list *list = get_merge_bases_many(A, X_nr, X_array);
 		printf("%s(A,X):\n", av[1]);