build: add manually-dispatched stress-test workflow

[joyeecheung]

Add a GitHub action workflow that can be manually dispatched to stress-run tests on a PR/branch to verify flakiness.

[nodejs-github-bot]

Review requested:

• @nodejs/actions

[panva]

How would I trigger this on a PR created from the contributor's fork?

[joyeecheung]

How would I trigger this on a PR created from the contributor's fork?

This version only allows triggering from a branch in the repo the workflow file is in - you could still do it from a PR, just that PR must come from a branch here (which also means you need to have write access here). If someone wants to make it work for a fork I think that can be a follow up, but be aware that allowing runs from forks can carry security risks, and to make this action useful there's an argument that allows arbitrary arguments to test.py.

I think for the best balance between usefulness v.s. safety it's better to only allow people with write access in this repo to test from a branch in this repo. If they want to run it from a fork, just use an action from that fork, but not from this repo. So to your question - pull that contributor's branch to your fork, and run that action from your fork.

[panva]

Add a GitHub action workflow that can be manually dispatched to stress-run tests on a PR/branch to verify flakiness.

I only asked because of the description that specifically mentions PRs. I'm fine with the scope-as is.

[joyeecheung]

PRs are still possible, just that the PRs need to come from a branch in repo, not from a fork e.g. the PR must be nodejs:test -> nodejs:main, not someone:test -> nodejs:main (that means the author needs to have write access to this repo to create nodejs:test).

[joyeecheung]

Fixed the linter complaints. Can you take a look again? Thanks! @panva @Renegade334

[Renegade334]

Don't think that there's any need to cache locally on the runner if there's only one build per workflow run?

Suggested change

	CC: ${{ startsWith(inputs.os, 'ubuntu') && 'sccache clang-19' || 'sccache gcc' }}
	CXX: ${{ startsWith(inputs.os, 'ubuntu') && 'sccache clang++-19' || 'sccache g++' }}
	CC: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} ${{ startsWith(inputs.os, 'ubuntu') && 'clang-19' || 'gcc' }}
	CXX: ${{ (github.base_ref == 'main' || github.ref_name == 'main') && 'sccache' || '' }} ${{ startsWith(inputs.os, 'ubuntu') && 'clang++-19' || 'g++' }}

[Renegade334]

Suggested change

	- name: Set up sccache
	- name: Set up sccache
	if: github.base_ref == 'main' || github.ref_name == 'main'