fetch-pack: eliminate spurious error messages

It used to be that if "--all", "--depth", and also explicit references
were sought, then the explicit references were not handled correctly
in filter_refs() because the "--all --depth" code took precedence over
the explicit reference handling, and the explicit references were
never noted as having been found.  So check for explicitly sought
references before proceeding to the "--all --depth" logic.

This fixes two test cases in t5500.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fetch-pack.c

@@ -549,9 +549,6 @@ static void filter_refs(struct ref **refs, struct string_list *sought)
 		if (!memcmp(ref->name, "refs/", 5) &&
 		    check_refname_format(ref->name + 5, 0))
 			; /* trash */
-		else if (args.fetch_all &&
-			 (!args.depth || prefixcmp(ref->name, "refs/tags/")))
-			keep = 1;
 		else {
 			while (sought_pos < sought->nr) {
 				int cmp = strcmp(ref->name, sought->items[sought_pos].string);
@@ -567,6 +564,10 @@ static void filter_refs(struct ref **refs, struct string_list *sought)
 			}
 		}
 
+		if (! keep && args.fetch_all &&
+		    (!args.depth || prefixcmp(ref->name, "refs/tags/")))
+			keep = 1;
+
 		if (keep) {
 			*newtail = ref;
 			ref->next = NULL;
@@ -576,8 +577,7 @@ static void filter_refs(struct ref **refs, struct string_list *sought)
 		}
 	}
 
-	if (!args.fetch_all)
-		filter_string_list(sought, 0, non_matching_ref, NULL);
+	filter_string_list(sought, 0, non_matching_ref, NULL);
 	*refs = newlist;
 }
 

t/t5500-fetch-pack.sh

@@ -427,14 +427,14 @@ test_expect_success 'test missing ref before existing' '
 	test_cmp expect-error error-me
 '
 
-test_expect_failure 'test --all, --depth, and explicit head' '
+test_expect_success 'test --all, --depth, and explicit head' '
 	(
 		cd client &&
 		git fetch-pack --no-progress --all --depth=1 .. refs/heads/A
 	) >out-adh 2>error-adh
 '
 
-test_expect_failure 'test --all, --depth, and explicit tag' '
+test_expect_success 'test --all, --depth, and explicit tag' '
 	git tag OLDTAG refs/heads/B~5 &&
 	(
 		cd client &&