Self-hosted ARC for GitHub Copilot prefers NBGV_GitEngine=Disabled

[Cjewett]

Similar to the Dependabot issues the self-hosted GitHub Copilot flow has gaps in functionality at the organization and enterprise management level to set environment variables. As a result it would be ideal of Nerdbank.GitVersioning was smart enough to detect if it is running in a GitHub Copilot context and disable itself.

Some environment variables that our team members have found:
GITHUB_WORKFLOW=Copilot
GITHUB_ACTOR=copilot-swe-agent[bot]
GITHUB_JOB=copilot

There are workarounds such as setting the NBGV_GitEngine variable to Disabled in our different k8s runner scale sets, removing the package from GlobalPackageReference if env var exists, or updating settings per repository.

Thoughts on this one?

[AArnott]

How about the Github Copilot workaround I document here. Would that work for you?

[Cjewett]

@AArnott Yeah those instructions definitely work. The complaint we received is it can't be managed at an enterprise or organization level, so the maintenance continues to increase as the number of repositories grow. The hope is to land on something with less overhead. If we could manage it at an organization level then I don't think folks would complain since the number of organizations doesn't increase constantly. Our number of repositories is constantly increasing though (probably a separate issue...)

[AArnott]

Ok, let's do something like #1284, looking for GITHUB_ACTOR=copilot-swe-agent[bot] as an environment variable.

[Cjewett]

That looks good, tyvm! Once that's released we'll test it out.

[AArnott]

Watch for https://github.com/dotnet/Nerdbank.GitVersioning/releases/tag/v3.9.37-alpha on nuget.org in a few minutes.

[Cjewett]

Confirmed this resolved our issue. Thank you! The team is wondering what the official release cadence is. Any timeline on that @AArnott?

[AArnott]

Well, you needn't hesitate to use the prerelease.
But it looks like we've got a good amount of new functionality in 3.9, so I'll plan on releasing it in the next day or two.