Function get_expanded_map

remote.c:1997–2030

* Create and return a list of (struct ref) consisting of copies of * each remote_ref that matches refspec. refspec must be a pattern. * Fill in the copies' peer_ref to describe the local tracking refs to * which they map. Omit any references that would map to an existing * local symbolic ref. */

 * local symbolic ref.
 */
static struct ref *get_expanded_map(const struct ref *remote_refs,
				    const struct refspec_item *refspec)
{
	struct strbuf scratch = STRBUF_INIT;
	const struct ref *ref;
	struct ref *ret = NULL;
	struct ref **tail = &ret;

	for (ref = remote_refs; ref; ref = ref->next) {
		char *expn_name = NULL;

		strbuf_reset(&scratch);

		if (strchr(ref->name, '^'))
			continue; /* a dereference item */
		if (match_refname_with_pattern(refspec->src, ref->name,
					    refspec->dst, &expn_name) &&
		    !ignore_symref_update(expn_name, &scratch)) {
			struct ref *cpy = copy_ref(ref);

			if (cpy->peer_ref)
				free_one_ref(cpy->peer_ref);
			cpy->peer_ref = alloc_ref(expn_name);
			if (refspec->force)
				cpy->peer_ref->force = 1;
			*tail = cpy;
			tail = &cpy->next;
		}
		free(expn_name);
	}

	strbuf_release(&scratch);
	return ret;
}

static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
{