Commit 477673d6f3 ("send-pack: support push negotiation", 2021-05-05)
did not test the case in which a remote advertises at least one ref. In
such a case, "remote_refs" in get_commons_through_negotiation() in
send-pack.c would also contain those refs with a zero ref->new_oid (in
addition to the refs being pushed with a nonzero ref->new_oid). Passing
them as negotiation tips to "git fetch" causes an error, so filter them
out.
(The exact error that would happen in "git fetch" in this case is a
segmentation fault, which is unwanted. This will be fixed in the
subsequent commit.)
Signed-off-by: Jonathan Tan <jonathantanmy@xxxxxxxxxx>
---
send-pack.c | 6 ++++--
t/t5516-fetch-push.sh | 5 +++++
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/send-pack.c b/send-pack.c
index 9cb9f71650..85945becf0 100644
--- a/send-pack.c
+++ b/send-pack.c
@@ -425,8 +425,10 @@ static void get_commons_through_negotiation(const char *url,
child.no_stdin = 1;
child.out = -1;
strvec_pushl(&child.args, "fetch", "--negotiate-only", NULL);
- for (ref = remote_refs; ref; ref = ref->next)
- strvec_pushf(&child.args, "--negotiation-tip=%s", oid_to_hex(&ref->new_oid));
+ for (ref = remote_refs; ref; ref = ref->next) {
+ if (!is_null_oid(&ref->new_oid))
+ strvec_pushf(&child.args, "--negotiation-tip=%s", oid_to_hex(&ref->new_oid));
+ }
strvec_push(&child.args, url);
if (start_command(&child))
diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh
index 5ce32e531a..e383ba662f 100755
--- a/t/t5516-fetch-push.sh
+++ b/t/t5516-fetch-push.sh
@@ -201,6 +201,7 @@ test_expect_success 'push with negotiation' '
# Without negotiation
mk_empty testrepo &&
git push testrepo $the_first_commit:refs/remotes/origin/first_commit &&
+ test_commit -C testrepo unrelated_commit &&
git -C testrepo config receive.hideRefs refs/remotes/origin/first_commit &&
echo now pushing without negotiation &&
GIT_TRACE2_EVENT="$(pwd)/event" git -c protocol.version=2 push testrepo refs/heads/main:refs/remotes/origin/main &&
@@ -210,6 +211,7 @@ test_expect_success 'push with negotiation' '
rm event &&
mk_empty testrepo &&
git push testrepo $the_first_commit:refs/remotes/origin/first_commit &&
+ test_commit -C testrepo unrelated_commit &&
git -C testrepo config receive.hideRefs refs/remotes/origin/first_commit &&
GIT_TRACE2_EVENT="$(pwd)/event" git -c protocol.version=2 -c push.negotiate=1 push testrepo refs/heads/main:refs/remotes/origin/main &&
grep_wrote 2 event # 1 commit, 1 tree
@@ -219,6 +221,7 @@ test_expect_success 'push with negotiation proceeds anyway even if negotiation f
rm event &&
mk_empty testrepo &&
git push testrepo $the_first_commit:refs/remotes/origin/first_commit &&
+ test_commit -C testrepo unrelated_commit &&
git -C testrepo config receive.hideRefs refs/remotes/origin/first_commit &&
GIT_TEST_PROTOCOL_VERSION=0 GIT_TRACE2_EVENT="$(pwd)/event" \
git -c push.negotiate=1 push testrepo refs/heads/main:refs/remotes/origin/main 2>err &&
@@ -1783,6 +1786,7 @@ test_expect_success 'http push with negotiation' '
# Without negotiation
test_create_repo "$SERVER" &&
test_config -C "$SERVER" http.receivepack true &&
+ test_commit -C "$SERVER" unrelated_commit &&
git -C client push "$URI" first_commit:refs/remotes/origin/first_commit &&
git -C "$SERVER" config receive.hideRefs refs/remotes/origin/first_commit &&
GIT_TRACE2_EVENT="$(pwd)/event" git -C client -c protocol.version=2 \
@@ -1794,6 +1798,7 @@ test_expect_success 'http push with negotiation' '
rm -rf "$SERVER" &&
test_create_repo "$SERVER" &&
test_config -C "$SERVER" http.receivepack true &&
+ test_commit -C "$SERVER" unrelated_commit &&
git -C client push "$URI" first_commit:refs/remotes/origin/first_commit &&
git -C "$SERVER" config receive.hideRefs refs/remotes/origin/first_commit &&
GIT_TRACE2_EVENT="$(pwd)/event" git -C client -c protocol.version=2 -c push.negotiate=1 \
--
2.32.0.288.g62a8d224e6-goog
