Switch from Travis to GitHub Actions

[kring]

No description provided.

[csciguy8]

Look like equivalent changes to travis, with some improvements. I'm excited to use it.

Just some assorted questions due to my own ignorance. Looks good to go though.

[csciguy8]

One more observation. All the jobs are slower than their equivalent travis jobs. All but the macOS build are ~2x slower. Even with this, the times still seem reasonable.

[kring]

All but the macOS build are ~2x slower.

I'm guessing this is because we're building/testing the release configuration, too, now. If the extra build time is a problem, we could separate the debug and release configurations into separate jobs. Or even remove the release build entirely, to go back to the way things were on Travis.

[kring]

This is ready for another look.

[csciguy8]

All but the macOS build are ~2x slower.

I'm guessing this is because we're building/testing the release configuration, too, now. If the extra build time is a problem, we could separate the debug and release configurations into separate jobs. Or even remove the release build entirely, to go back to the way things were on Travis.

Makes sense. More work, more time needed.

I like the idea of catching release build problems, release test problems. Sounds worth it to me.

[csciguy8]

Weird, looks like the latest Linux + Clang build is failing.

I don't see any commits that could have broken it since the last good build, but I do see that the runner image version has changed (now 20230924.1.0)

[kring]

looks like the latest Linux + Clang build is failing.

Ha yeah apparently GitHub just removed Clang 12 support from their Linux runner:
actions/runner-images#8263

Should be able to switch to ubuntu-20.04. I'll try it.