Merge branch 'jt/transfer-fsck-across-packs-fix'

The code to fsck objects received across multiple packs during a
single git fetch session has been broken when the packfile URI
feature was in use.  A workaround has been added by disabling the
codepath to avoid keeping a packfile that is too small.

* jt/transfer-fsck-across-packs-fix:
  fetch-pack: do not mix --pack_header and packfile uri

fetch-pack.c

@@ -846,7 +846,7 @@ static int get_pack(struct fetch_pack_args *args,
 	else
 		demux.out = xd[0];
 
-	if (!args->keep_pack && unpack_limit) {
+	if (!args->keep_pack && unpack_limit && !index_pack_args) {
 
 		if (read_pack_header(demux.out, &header))
 			die(_("protocol error: bad pack header"));
@@ -879,7 +879,7 @@ static int get_pack(struct fetch_pack_args *args,
 			strvec_push(&cmd.args, "-v");
 		if (args->use_thin_pack)
 			strvec_push(&cmd.args, "--fix-thin");
-		if (do_keep && (args->lock_pack || unpack_limit)) {
+		if ((do_keep || index_pack_args) && (args->lock_pack || unpack_limit)) {
 			char hostname[HOST_NAME_MAX + 1];
 			if (xgethostname(hostname, sizeof(hostname)))
 				xsnprintf(hostname, sizeof(hostname), "localhost");

t/t5702-protocol-v2.sh

@@ -881,6 +881,27 @@ test_expect_success 'part of packfile response provided as URI' '
 	test_line_count = 6 filelist
 '
 
+test_expect_success 'packfile URIs with fetch instead of clone' '
+	P="$HTTPD_DOCUMENT_ROOT_PATH/http_parent" &&
+	rm -rf "$P" http_child log &&
+
+	git init "$P" &&
+	git -C "$P" config "uploadpack.allowsidebandall" "true" &&
+
+	echo my-blob >"$P/my-blob" &&
+	git -C "$P" add my-blob &&
+	git -C "$P" commit -m x &&
+
+	configure_exclusion "$P" my-blob >h &&
+
+	git init http_child &&
+
+	GIT_TEST_SIDEBAND_ALL=1 \
+	git -C http_child -c protocol.version=2 \
+		-c fetch.uriprotocols=http,https \
+		fetch "$HTTPD_URL/smart/http_parent"
+'
+
 test_expect_success 'fetching with valid packfile URI but invalid hash fails' '
 	P="$HTTPD_DOCUMENT_ROOT_PATH/http_parent" &&
 	rm -rf "$P" http_child log &&