Add PIP_EXTRA_INDEX_URL and gh tool to build images

[divyegala]

Depends on rapidsai/gha-tools#57

This PR adds:

• PIP_EXTRA_INDEX_URL : Environment variable for RAPIDS wheels index
• gh : CLI tool to generate RAPIDS_DATE_STRING

[divyegala]

@ajschmidt8 could you re-review? I added gh tool to the images

[ajschmidt8]

Since these changes install the gh CLI via the OSes native package managers, the installed versions will likely be different.

To keep the versions consistent across our images, I think it might be better to install gh using the artifacts on their release pages: https://github.com/cli/cli/releases.

It looks like they have a tarball for each architecture (arm64 and amd64) that we can extract to get the actual gh binary.

For now we can hardcode the version to their latest release, 2.32.0.

When we move these images over to the rapidsai/ci-imgs repository, we can configure the renovate bot to open PRs to keep the version updated for us. See the references below for more about renovate:

• https://github.com/renovatebot/renovate
• Dependency Dashboard ci-imgs#14
• Update mikefarah/yq Docker tag to v4.34.2 ci-imgs#55

[vyasr]

Approving assuming AJ's request regarding gh CLI installation is addressed.

[ajschmidt8]

Based on the logs, it looks like Ubuntu installed the latest version (which is expected since you added the PPA), but CentOS actually didn't install any version at all:

• ubuntu - https://github.com/rapidsai/cibuildwheel-imgs/actions/runs/5601770001/jobs/10246122561?pr=29#step:8:1454
• centos - https://github.com/rapidsai/cibuildwheel-imgs/actions/runs/5601770001/jobs/10246121749?pr=29#step:8:316

[divyegala]

@ajschmidt8 do you know off the top of your head where should I unpack these tarballs so gh is available in PATH seamlessly?

[ajschmidt8]

@ajschmidt8 do you know off the top of your head where should I unpack these tarballs so gh is available in PATH seamlessly?

/usr/local/bin is probably a safe bet.

[ajschmidt8]

let's check the GHAs logs before merging this to make sure they look right, but this looks good to me.