ref-filter: allow NULL filter pattern

When setting up `struct ref_filter` for filter_refs(), the `name_patterns` field must point to an array of pattern strings even if no patterns are required. To improve this interface, treat a NULL `name_patterns` field the same as when it points to an empty array. Signed-off-by: Justin Tobler <jltobler@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Justin Tobler committed Oct 21, 2025 at 13:25 UTC eafc03dbe316478acff5eef3b70c037de4758f08
1 file changed +2 -2
ref-filter.c
+2 -2
@@ -2664,7 +2664,7 @@ static int match_name_as_path(const char **pattern, const char *refname,
2664 /* Return 1 if the refname matches one of the patterns, otherwise 0. */
2665 static int filter_pattern_match(struct ref_filter *filter, const char *refname)
2666 {
2667 - if (!*filter->name_patterns)
2667 + if (!filter->name_patterns || !*filter->name_patterns)
2668 return 1; /* No pattern always matches */
2669 if (filter->match_as_path)
2670 return match_name_as_path(filter->name_patterns, refname,
@@ -2751,7 +2751,7 @@ static int for_each_fullref_in_pattern(struct ref_filter *filter,
2751 return for_each_fullref_with_seek(filter, cb, cb_data, 0);
2752 }
2753
2754 - if (!filter->name_patterns[0]) {
2754 + if (!filter->name_patterns || !filter->name_patterns[0]) {
2755 /* no patterns; we have to look at everything */
2756 return for_each_fullref_with_seek(filter, cb, cb_data, 0);
2757 }