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Test if the images built with Buildah and run using Podman have good GPU support. In other words, can they be used on the GPU machines are the LPC?

Just like docker-in-docker, can a podman container be run inside of another podman container? Can one mix and match docker, podman, and singularity? What are the limitations?

@kpedro88

Fix failing pylint tests (i.e. https://github.com/FNALLPC/lpc-scripts/actions/runs/2553874182).

This issue is related to files which will be added with #18.

The version of Buildah on cmslpcheavy-sl7 right now is 1.11.6, but the latest version is 1.21.0. The later versions have a feature that allow the use of ARG commands within a COPY commands parameters (i.e. chown) inside of a Dockerfile. This would allow us to remove the hard coded cmsusr username in https://github.com/FNALLPC/lpc-scripts/pull/18/files#diff-64e49c956c3cc82ad01ae4cc0497f5ee63343fa4b61c8c7733199205ca5bd187R47. That line would change to be something like:

ARG USERNAME_BUILD=cmsusr
ARG USERNAME=cmsusr
COPY --from=builder --chown=${USERNAME}:${USERNAME} /home/${USERNAME_BUILD}/${CMSSW_VERSION} /home/${USERNAME}/${CMSSW_VERSION}

Create GitHub Action to lint the python files and make sure they are python3 compatible. Could use pylint, flake8, etc.

With the addition of #25 we can now see that there are a lot of linting issues, both with the python and with the shell codes. We need new PRs to fix these issues.