Merge branch 'ds/for-each-ref-is-base'

'git for-each-ref' learned a new "--format" atom to find the branch
that the history leading to a given commit "%(is-base:<commit>)" is
likely based on.

* ds/for-each-ref-is-base:
  p1500: add is-base performance tests
  for-each-ref: add 'is-base' token
  commit: add gentle reference lookup method
  commit-reach: add get_branch_base_for_tip

1 files changed, 7 insertions, 1 deletions

diff --git a/commit.c b/commit.c
index 24ab5c1b50..3238772f52 100644
--- a/commit.c
+++ b/commit.c
@@ -85,12 +85,18 @@ struct commit *lookup_commit(struct repository *r, const struct object_id *oid)
 
 struct commit *lookup_commit_reference_by_name(const char *name)
 {
+	return lookup_commit_reference_by_name_gently(name, 0);
+}
+
+struct commit *lookup_commit_reference_by_name_gently(const char *name,
+						      int quiet)
+{
 	struct object_id oid;
 	struct commit *commit;
 
 	if (repo_get_oid_committish(the_repository, name, &oid))
 		return NULL;
-	commit = lookup_commit_reference(the_repository, &oid);
+	commit = lookup_commit_reference_gently(the_repository, &oid, quiet);
 	if (repo_parse_commit(the_repository, commit))
 		return NULL;
 	return commit;