@leroysheep / rag-system / commits / 75b7cb5e14

t1800: test SIGPIPE with parallel hooks

We recently fixed a bug in commit 2226ffaacd (run_processes_parallel(): fix order of sigpipe handling, 2026-04-08) where a hook that caused us to get SIGPIPE would accidentally trigger the run_processes_parallel() cleanup handler killing the child processes. For a single hook, this meant killing the already-exited hook. This case was triggered by our tests, but was only a problem on some platforms. But if you have multiple hooks running in parallel, this causes a problem everywhere, since one hook failing to read its input would take down all hooks. Now that we have parallel hook support, we can add a test for this case. It should pass already, due to the existing fix. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Jeff King committed Apr 10, 2026 at 12:06 UTC 75b7cb5e14f03965cf87a976356bcbdcfb4edbad
1 file changed +38
t/t1800-hook.sh
+38
index 41b2b2c746..0132e772e4 100755 --- a/t/t1800-hook.sh +++ b/t/t1800-hook.sh @@ -1190,4 +1190,42 @@ test_expect_success 'friendly-name matching unknown event warns' ' test_grep "same as its event" err ' +test_expect_success 'hooks in parallel that do not read input' ' + # Add this to our $PATH to avoid having to write the whole trash + # directory into our config options, which would require quoting. + mkdir bin && + PATH=$PWD/bin:$PATH && + + write_script bin/hook-fast <<-\EOF && + # This hook does not read its input, so the parent process + # may see SIGPIPE if it is not ignored. It should happen + # relatively quickly. + exit 0 + EOF + + write_script bin/hook-slow <<-\EOF && + # This hook is slow, so we expect it to still be running + # when the other hook has exited (and the parent has a pipe error + # writing to it). + # + # So we want to be slow enough that we expect this to happen, but not + # so slow that the test takes forever. 1 second is probably enough + # in practice (and if it is occasionally not on a loaded system, we + # will err on the side of having the test pass). + sleep 1 + exit 0 + EOF + + git init --bare parallel.git && + git -C parallel.git config hook.fast.command "hook-fast" && + git -C parallel.git config hook.fast.event pre-receive && + git -C parallel.git config hook.fast.parallel true && + git -C parallel.git config hook.slow.command "hook-slow" && + git -C parallel.git config hook.slow.event pre-receive && + git -C parallel.git config hook.slow.parallel true && + git -C parallel.git config hook.jobs 2 && + + git push ./parallel.git "+refs/heads/*:refs/heads/*" +' + test_done