Merge branch 'jt/avoid-lazy-fetching-upon-have-check' into master

Fetching from a lazily cloned repository resulted at the server
side in attempts to lazy fetch objects that the client side has,
many of which will not be available from the third-party anyway.

* jt/avoid-lazy-fetching-upon-have-check:
  upload-pack: do not lazy-fetch "have" objects

Author: gitster

t/t5616-partial-clone.sh

@@ -422,6 +422,44 @@ test_expect_success 'single-branch tag following respects partial clone' '
 	test_must_fail git -C single rev-parse --verify refs/tags/C
 '
 
+test_expect_success 'fetch from a partial clone, protocol v0' '
+	rm -rf server client trace &&
+
+	# Pretend that the server is a partial clone
+	git init server &&
+	git -C server remote add a_remote "file://$(pwd)/" &&
+	test_config -C server core.repositoryformatversion 1 &&
+	test_config -C server extensions.partialclone a_remote &&
+	test_config -C server protocol.version 0 &&
+	test_commit -C server foo &&
+
+	# Fetch from the server
+	git init client &&
+	test_config -C client protocol.version 0 &&
+	test_commit -C client bar &&
+	GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
+	! grep "version 2" trace
+'
+
+test_expect_success 'fetch from a partial clone, protocol v2' '
+	rm -rf server client trace &&
+
+	# Pretend that the server is a partial clone
+	git init server &&
+	git -C server remote add a_remote "file://$(pwd)/" &&
+	test_config -C server core.repositoryformatversion 1 &&
+	test_config -C server extensions.partialclone a_remote &&
+	test_config -C server protocol.version 2 &&
+	test_commit -C server foo &&
+
+	# Fetch from the server
+	git init client &&
+	test_config -C client protocol.version 2 &&
+	test_commit -C client bar &&
+	GIT_TRACE_PACKET="$(pwd)/trace" git -C client fetch "file://$(pwd)/server" &&
+	grep "version 2" trace
+'
+
 . "$TEST_DIRECTORY"/lib-httpd.sh
 start_httpd
 

upload-pack.c

@@ -482,7 +482,8 @@ static int got_oid(struct upload_pack_data *data,
 {
 	if (get_oid_hex(hex, oid))
 		die("git upload-pack: expected SHA1 object, got '%s'", hex);
-	if (!has_object_file(oid))
+	if (!has_object_file_with_flags(oid,
+					OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT))
 		return -1;
 	return do_got_oid(data, oid);
 }
@@ -1423,7 +1424,8 @@ static int process_haves(struct upload_pack_data *data, struct oid_array *common
 	for (i = 0; i < data->haves.nr; i++) {
 		const struct object_id *oid = &data->haves.oid[i];
 
-		if (!has_object_file(oid))
+		if (!has_object_file_with_flags(oid,
+						OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT))
 			continue;
 
 		oid_array_append(common, oid);