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by arclight_ 390 days ago
It's important to note that this tool does not use the same container images or runtime environment that GitHub Actions actually runs. It's an approximation.

For simple use cases that won't matter, but if you have complex GitHub Actions you're bound to find varying behavior. That can lead to frustration when you're debugging bizarre CI failures.
2 comments
globular-toast 390 days ago
Yeah, this is lame. With Gitlab you can choose the exact image that runs and provide your own. So you can easily run the exact same code in the exact same environment locally.

I guess it would be nice to have a tool to convert a Gitlab YAML to Docker incantations, but I've never needed to do it that often for it to be a problem.

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plumeria 390 days ago
AWS Lambda publishes Docker images (e.g. public.ecr.aws/lambda/python:3.12-arm64), does Github Actions have something similar?
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esafak 390 days ago
https://github.com/actions/runner-images
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mdaniel 390 days ago
In case anyone else is similarly curious, I managed to get the ubuntu images to build .qcow2 images with some lightweight patches to the packer files and the interior .sh provisioning scripts. I have intention of setting up (heh) GHA to build them on the regular but it has not yet risen to be the highest priority weekend project

If you may say "but, why?!" it's because I really wanted to know what versions of everything I could expect in GHA, and I detest "git commit -amdummy && git push" stupidity so I guess the answer is "because I'm wired that way"

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