From e2f41a0a5aaa0116c9f1463fd779ce832eb773cc Mon Sep 17 00:00:00 2001 From: Jonathan Tan Date: Thu, 17 Jan 2019 15:33:05 -0800 Subject: [PATCH] ls-refs: filter refs using namespace-stripped name If a user fetches refs/heads/master from a repo with namespace "ns", the remote is expected to (1) not send the real refs/heads/master, and (2) send refs/namespaces/ns/refs/heads/master with the name refs/heads/master. (1) indeed happens now, but not (2) - Git only sends refs that have the user-given prefix, but it checks them against the full name of the ref (the one starting with refs/namespaces), and not the namespace-stripped one. This is demonstrated by the patch in the test. Currently, it results in "fatal: couldn't find remote ref refs/heads/master" despite both unnamespaced and namespaced master being present. With the code change, it produces the expected result. Check the ref prefixes against the namespace-stripped name. This bug was discovered through applying patches [1] that override protocol.version to 2 in repositories when running tests, allowing us to notice differences in behavior across different protocol versions. [1] https://public-inbox.org/git/cover.1547677183.git.jonathantanmy@google.com/ Signed-off-by: Jonathan Tan Signed-off-by: Junio C Hamano --- ls-refs.c | 2 +- t/t5702-protocol-v2.sh | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/ls-refs.c b/ls-refs.c index a06f12eca8..7782bb054b 100644 --- a/ls-refs.c +++ b/ls-refs.c @@ -40,7 +40,7 @@ static int send_ref(const char *refname, const struct object_id *oid, const char *refname_nons = strip_namespace(refname); struct strbuf refline = STRBUF_INIT; - if (!ref_match(&data->prefixes, refname)) + if (!ref_match(&data->prefixes, refname_nons)) return 0; strbuf_addf(&refline, "%s %s", oid_to_hex(oid), refname_nons); diff --git a/t/t5702-protocol-v2.sh b/t/t5702-protocol-v2.sh index 0f2b09ebb8..3d802aa587 100755 --- a/t/t5702-protocol-v2.sh +++ b/t/t5702-protocol-v2.sh @@ -514,6 +514,27 @@ test_expect_success 'fetch with http:// using protocol v2' ' grep "git< version 2" log ' +test_expect_success 'fetch from namespaced repo respects namespaces' ' + test_when_finished "rm -f log" && + + git init "$HTTPD_DOCUMENT_ROOT_PATH/nsrepo" && + test_commit -C "$HTTPD_DOCUMENT_ROOT_PATH/nsrepo" one && + test_commit -C "$HTTPD_DOCUMENT_ROOT_PATH/nsrepo" two && + git -C "$HTTPD_DOCUMENT_ROOT_PATH/nsrepo" \ + update-ref refs/namespaces/ns/refs/heads/master one && + + GIT_TRACE_PACKET="$(pwd)/log" git -C http_child -c protocol.version=2 \ + fetch "$HTTPD_URL/smart_namespace/nsrepo" \ + refs/heads/master:refs/heads/theirs && + + # Server responded using protocol v2 + grep "fetch< version 2" log && + + git -C "$HTTPD_DOCUMENT_ROOT_PATH/nsrepo" rev-parse one >expect && + git -C http_child rev-parse theirs >actual && + test_cmp expect actual +' + test_expect_success 'push with http:// and a config of v2 does not request v2' ' test_when_finished "rm -f log" && # Till v2 for push is designed, make sure that if a client has