Feature: Auto assign, change and remove labels based on context

[yardasol]

Background and motivation

Right now, most of the label assignment is manual. It would be nice to have tag assignment (and removal/modification) be semi-automatic

Description of idea

We can use github actions to do this!

Specifically, I would like to be able to have the following processes be automatic:

• Change status label based on whether a feature/fix branch exists, as well as when issues are linked to PRs
• Change priority label based on proximity to milestone deadline
• Remove status and priority labels when issues are closed and PRs are merged.

Implementation details

We can use github actions + GitHub's REST API to do this!

Useful resources:

• https://docs.github.com/en/actions/using-workflows/triggering-a-workflow#using-event-information
• https://docs.github.com/en/rest/reference/issues
• https://docs.github.com/en/developers/webhooks-and-events/events/issue-event-types
• https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#issue_comment
• https://cli.github.com/manual/gh_issue_edit
• https://docs.github.com/en/actions/advanced-guides/using-github-cli-in-workflows

Potential snags

We may not be able to do all of the above.

[yardasol]

I've played around with the REST API a little bit trying to find a way to complete the first two items, but there doesn't see to be a good way to do them right now because there is no direct data about linked issues for PRs in the REST API.

The third third item is sufficient for our purposes anyways.

[yardasol]

Well it looks like the workflow isn't working. Looks like there are two issues:

1. Seems gh wants an exact match for the label and not a regex
2. The PR job isn't running at all.

I'm reopening this issue. I've disabled the workflow in the meanwhile