Tolerate no trailing .git when determining SHORTNAME

[foolip]

No description provided.

[foolip]

Yes, this is an hilarious amount of escaping!

[annevk]

Why is this needed?

I'm wondering if it would be better to hardcode the couple of exceptions we have here with respect to shortname in factory.json and propagate it as input parameter.

[foolip]

This is because Travis clones repos with a trailing .git and GitHub Actions has not trailing .git.

I tested the before/after on GitHub Actions here:
https://github.com/whatwg/whatwg.org/runs/765365436?check_suite_focus=true
https://github.com/whatwg/whatwg.org/runs/765546248?check_suite_focus=true

This could also be done using the GITHUB_REPOSITORY environment variable, but we'd still need something for local deployment. Or we could just use the directory name for local deployment, right?

[annevk]

Sorry, I was thinking about the wrong thing. We should probably indicate we can clean this up post-transition.

[annevk]

But consider adding a comment to remind us to simplify once Travis isn't a dependency anymore.

[foolip]

I'll send a follow-up that does something much simpler for GitHub Actions. The other path will then be for local, where it actually makes sense to handle both cases, and will continue to work on Travis.

[foolip]

Sent #326.