name: "Pull Request Labeler"
on:
  pull_request_target:
    types: [opened, synchronize, reopened, labeled, unlabeled]
    branches: [main, next, release/**/*]

permissions:
  pull-requests: write

jobs:
  areas_label:
    runs-on: ubuntu-latest
    name: Label areas
    # Skip labeling main-next merge PRs. The area labels are noisy and distracting for main-next PRs because they can
    # contain many commits, and thus touch nearly the whole repo in a single commit. Skipping these labels makes it
    # easier to focus on the more relevant main-next labels.
    #
    # This is implemented by comparing the PR title because at creation time, the PR has no labels (and the GItHub API
    # does not have a way to set labels at creation either), so skipping based on labels does not work.
    steps:
      - uses: actions/labeler@5c7539237e04b714afd8ad9b4aed733815b9fab4 # ratchet:actions/labeler@v4.0.2
        if: "github.event.pull_request.title != 'Automation: main-next integrate'"
        with:
          configuration-path: ".github/labeler-areas.yml"
          repo-token: "${{ github.token }}"
          sync-labels: true # add/remove labels as modified paths in the PR change
  # Changes to some paths should automatically add the changeset-required label. This label is often added manually, so
  # this CI job calls the labeler action wuth sync-labels=false, so the label won't be removed automatically.
  changesets_label:
    runs-on: ubuntu-latest
    name: Label changeset-required
    steps:
      - uses: actions/labeler@5c7539237e04b714afd8ad9b4aed733815b9fab4 # ratchet:actions/labeler@v4.0.2
        with:
          configuration-path: ".github/labeler-changesets.yml"
          repo-token: "${{ github.token }}"
          sync-labels: false # The changeset-required label is often added manually, so don't remove it.
  branches_label:
    runs-on: ubuntu-latest
    name: Label base branches and external contributors
    steps:
      - uses: srvaroa/labeler@9c29ad1ef33d169f9ef33c52722faf47a566bcf3 # ratchet:srvaroa/labeler@v1
        env:
          GITHUB_TOKEN: "${{ github.token }}"