commit: add gentle reference lookup method

The lookup_commit_reference_by_name() method uses lookup_commit_reference()
without an option to use lookup_commit_reference_gently(). Create a gentle
version of the method so it can be used in locations where non-commits may
be found but error messages should be silenced.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/commit.h b/commit.h
index d62b1d93f9..0e5fce543c 100644
--- a/commit.h
+++ b/commit.h
@@ -81,6 +81,8 @@ struct commit *lookup_commit_reference_gently(struct repository *r,
 					      const struct object_id *oid,
 					      int quiet);
 struct commit *lookup_commit_reference_by_name(const char *name);
+struct commit *lookup_commit_reference_by_name_gently(const char *name,
+						      int quiet);
 
 /*
  * Look up object named by "oid", dereference tag as necessary,