ref-filter: populate symref from iterator

With a previous commit, the reference the symbolic ref points to is saved
in the ref iterator records. Instead of making a separate call to
resolve_refdup() each time, we can just populate the ref_array_item with
the value from the iterator.

Signed-off-by: John Cai <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: john-cai

ref-filter.c

@@ -2343,6 +2343,12 @@ static int populate_value(struct ref_array_item *ref, struct strbuf *err)
 
 	CALLOC_ARRAY(ref->value, used_atom_cnt);
 
+	/**
+	 * NEEDSWORK: The following code might be unncessary if all codepaths
+	 * that call populate_value() populates the symref member of ref_array_item
+	 * like in apply_ref_filter(). Currently pretty_print_ref() is the only codepath
+	 * that calls populate_value() without first populating symref.
+	 */
 	if (need_symref && (ref->flag & REF_ISSYMREF) && !ref->symref) {
 		ref->symref = refs_resolve_refdup(get_main_ref_store(the_repository),
 						  ref->refname,
@@ -2783,7 +2789,7 @@ static int filter_ref_kind(struct ref_filter *filter, const char *refname)
 	return ref_kind_from_refname(refname);
 }
 
-static struct ref_array_item *apply_ref_filter(const char *refname, const struct object_id *oid,
+static struct ref_array_item *apply_ref_filter(const char *refname, const char *referent, const struct object_id *oid,
 			    int flag, struct ref_filter *filter)
 {
 	struct ref_array_item *ref;
@@ -2852,6 +2858,7 @@ static struct ref_array_item *apply_ref_filter(const char *refname, const struct
 	ref->commit = commit;
 	ref->flag = flag;
 	ref->kind = kind;
+	ref->symref = xstrdup_or_null(referent);
 
 	return ref;
 }
@@ -2865,12 +2872,12 @@ struct ref_filter_cbdata {
  * A call-back given to for_each_ref().  Filter refs and keep them for
  * later object processing.
  */
-static int filter_one(const char *refname, const char *referent UNUSED, const struct object_id *oid, int flag, void *cb_data)
+static int filter_one(const char *refname, const char *referent, const struct object_id *oid, int flag, void *cb_data)
 {
 	struct ref_filter_cbdata *ref_cbdata = cb_data;
 	struct ref_array_item *ref;
 
-	ref = apply_ref_filter(refname, oid, flag, ref_cbdata->filter);
+	ref = apply_ref_filter(refname, referent, oid, flag, ref_cbdata->filter);
 	if (ref)
 		ref_array_append(ref_cbdata->array, ref);
 
@@ -2900,13 +2907,13 @@ struct ref_filter_and_format_cbdata {
 	} internal;
 };
 
-static int filter_and_format_one(const char *refname, const char *referent UNUSED, const struct object_id *oid, int flag, void *cb_data)
+static int filter_and_format_one(const char *refname, const char *referent, const struct object_id *oid, int flag, void *cb_data)
 {
 	struct ref_filter_and_format_cbdata *ref_cbdata = cb_data;
 	struct ref_array_item *ref;
 	struct strbuf output = STRBUF_INIT, err = STRBUF_INIT;
 
-	ref = apply_ref_filter(refname, oid, flag, ref_cbdata->filter);
+	ref = apply_ref_filter(refname, referent, oid, flag, ref_cbdata->filter);
 	if (!ref)
 		return 0;