Build for linux in ubuntu 20.04 container #2152
Merged
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Resolves #952.
We need to continue to build for linux on Ubuntu 20.04, but the ubuntu-20.04 runners have been EOL'ed. When researching the linked issue, I found that using an ubuntu:20.04 container was widely regarded as the easiest solution. Accordingly, this PR updates to use an ubuntu:20.04 container for the linux build.
I think ideally we'd maintain a docker image that has the build dependencies (
build-essential ca-certificates openssl git zstd
) pre-installed, instead of pulling the image and apt-get installing the small handful of deps we need. This would allow us to skip the extra install steps on each build. Plus, we currently can't run the container as the runner user because we aren't allowed to apt-get install as the runner user -- but if the dependencies were pre-installed in the image, we could run the container as the runner user and thereby avoid theIgnore dubious ownership
workaround I had to add. However, I think the implementation in this PR is okay for the time being.