Proposal: Move all Circle CI configuration to run on GitHub Actions instead

[flimzy]

Proposal: Move all Circle CI configuration to run on GitHub Actions instead

[flimzy]

• Does GitHub actions provide us enough open source credits to run our relatively expensive test suite?

Good question. I don't know the answer.

• Do they provide Windows and Mac machines?

Yes. See https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners#supported-runners-and-hardware-resources

• How does performance compare?

Also don't know.

[nevkontakte]

I agree with the general sentiment. I think the only feature github actions doesn't support (and why I didn't actively attempt to move off circleci so far) is automated test splitting. CircleCI can use test timing information from previous runs to evenly distribute them into 4 parallel shards, which we use to run standard library tests. I'm not sure what's the best way to substitute this on GHA would be.

Other than that, a few potential considerations come to mind:

• Does GitHub actions provide us enough open source credits to run our relatively expensive test suite?
• Do they provide Windows and Mac machines?
• How does performance compare?