label.yml

name: 🏷️ Label

on:
  pull_request:
    types: [opened, edited, reopened]

permissions:
  contents: read

concurrency:
  group: label-${{ github.event.pull_request.number }}
  cancel-in-progress: true

jobs:
  label:
    name: 🏷️ Sort by type
    runs-on: ubuntu-latest
    if: >-
      github.event.pull_request.head.repo.full_name == github.repository
      && github.actor != 'dependabot[bot]'
    permissions:
      pull-requests: write
    steps:
      - name: Take the label off the conventional commit type
        env:
          GH_TOKEN: ${{ github.token }}
          GH_REPO: ${{ github.repository }}
          NUMBER: ${{ github.event.pull_request.number }}
          TITLE: ${{ github.event.pull_request.title }}
        run: |
          prefix=${TITLE%%:*}
          type=${prefix%%(*}
          case "${type%!}" in
            feat) wanted=enhancement ;;
            fix)  wanted=bug ;;
            docs) wanted=documentation ;;
            *)    wanted= ;;
          esac
          case "$prefix" in
            *'!') wanted="${wanted:+$wanted,}breaking-change" ;;
          esac
          for label in enhancement bug documentation breaking-change; do
            case ",$wanted," in
              *",$label,"*) ;;
              *) stale="${stale:+$stale,}$label" ;;
            esac
          done
          args=(--remove-label "$stale")
          if [ -n "$wanted" ]; then
            args+=(--add-label "$wanted")
          fi
          gh pr edit "$NUMBER" "${args[@]}"
          echo "### ${wanted:-no type label}" >> "$GITHUB_STEP_SUMMARY"