Pull Request Labeler

Pull request labeler triages PRs based on the paths that are modified in the PR.

To use, create a .github/labeler.yml file with a list of labels and minimatch globs to match to apply the label.

Example:

label1:
- example1/**/*

label2: example2/*

label3:
- example3/*
- example3/**/*.yml

Then create a workflow utilizing the labeler action, granting access to the GITHUB_TOKEN so the action can make calls to GitHub's rest API:

name: "Pull Request Labeler"
on: 
- pull_request

jobs:
  triage:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/labeler@v2
      with:
        repo-token: "${{ secrets.GITHUB_TOKEN }}"