version.yaml

on:
  pull_request:
    types:
      - closed
    branches:
      - main

name: Update versions and create release PR

jobs:
  is_merged:
    name: Check that PR was merged and not closed
    if: >
      github.event.pull_request.merged == true
      && ( contains(github.event.pull_request.labels.*.name, 'major')
        || contains(github.event.pull_request.labels.*.name, 'minor')
        || contains(github.event.pull_request.labels.*.name, 'patch')
      )
    runs-on: ubuntu-latest
    steps:
      - run: |
          echo "This is a canonical hack to run GitHub Actions on merged PRs"
          echo "See: https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#running-your-pull_request-workflow-when-a-pull-request-merges"

  release:
    name: Bump version and create PR
    needs: is_merged
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Bump version
        id: bump_version
        env:
          is_major: ${{ contains(github.event.pull_request.labels.*.name, 'major') }}
          is_minor: ${{ contains(github.event.pull_request.labels.*.name, 'minor') }}
          is_patch: ${{ contains(github.event.pull_request.labels.*.name, 'patch') }}
        run: |
          sudo apt-get install jq
          echo "old_version=$(jq '.version' package.json | tr -d '"')" >> "$GITHUB_OUTPUT"
          if [[ "$is_major" == "true" ]]; then
            npm version major --no-git-tag-version
          elif [[ "$is_minor" == "true" ]]; then
            npm version minor --no-git-tag-version
          elif [[ "$is_patch" == "true" ]]; then
            npm version patch --no-git-tag-version
          fi
          echo "new_version=$(jq '.version' package.json | tr -d '"')" >> "$GITHUB_OUTPUT"

      - name: Create release PR
        id: release_pr
        uses: peter-evans/create-pull-request@v5
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          branch: release/${{ steps.bump_version.outputs.new_version }}
          delete-branch: true
          base: main
          title: Release version ${{ steps.bump_version.outputs.new_version }}
          body: |
            Update version to ${{ steps.bump_version.outputs.new_version }}.
            Merge this PR to build and publish a new release.
          labels: release

      - name: Comment on PR with link to release PR
        uses: peter-evans/create-or-update-comment@v2
        with:
          issue-number: ${{ github.event.pull_request.number }}
          body: |
            A [PR][pr] to release these changes has been created, bumping the version from ${{ steps.bump_version.outputs.old_version }} to ${{ steps.bump_version.outputs.new_version }}.

            [pr]: ${{ steps.release_pr.outputs.pull-request-url }}