pr-workflow.yml

name: PR workflow

on:
  pull_request:
    types:
      - opened
      - synchronize
  push:
    branches:
      - main

jobs:
  semver-check:
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-latest
    outputs:
      version: ${{ steps.get-version.outputs.version }}
    steps:
      - name: Reattach HEAD
        uses: actions/checkout@v2
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          fetch-depth: 0

      - name: Merge main branch to PR branch
        uses: pr-mpt/actions-merge-branch@v2
        with:
          from: "origin/main"

      - name: Get current prefix
        id: branch-prefix
        run: echo "::set-output name=prefix::$(echo ${{ github.head_ref }} | cut -d '/' -f 1)"

      - name: Check if branch prefix is valid (major, minor, patch)
        run: |
          echo "Checking branch prefix..."
          echo "branch prefix: ${{ steps.branch-prefix.outputs.prefix }}"
          if [[ ${{ steps.branch-prefix.outputs.prefix }} != "major" && ${{ steps.branch-prefix.outputs.prefix }} != "minor" && ${{ steps.branch-prefix.outputs.prefix }} != "patch" && ${{ steps.branch-prefix.outputs.prefix }} != "dependabot" ]]; then
            echo "Branch prefix is not valid, exiting... allowed prefixes are major, minor, patch, dependabot"
            exit 1
          fi
          echo "Branch prefix is valid"

      - name: Set next version number based on prefix
        run: |
          echo "Getting next version number..."
          if [ "${{ steps.branch-prefix.outputs.prefix }}" == "major" ]; then
            echo "Bumping major version..."
            npm --no-git-tag-version version major
          elif [ "${{ steps.branch-prefix.outputs.prefix }}" == "minor" ]; then
            echo "Bumping minor version..."
            npm --no-git-tag-version version minor
          elif [ "${{ steps.branch-prefix.outputs.prefix }}" == "patch" ] || [ "${{ steps.branch-prefix.outputs.prefix }}" == "dependabot" ]; then
            echo "Bumping patch version..."
            npm --no-git-tag-version version patch
          else
            echo "Error: working branch prefix not found"
            exit 1
          fi
      
      - name: Get version number
        id: get-version
        run: echo "::set-output name=version::$(git describe --tags --abbrev=0)"

      - name: Setup git
        run: |
          echo "Setting up git..."
          git config --global user.email "${{ secrets.MY_EMAIL }}"
          git config --global user.name "${{ secrets.MY_USERNAME }}"

      - name: Commit and push changes to working branch
        run: |
          echo "Committing changes..."
          git add .
          git commit -am "chore(release): Bump ${{ steps.branch-prefix.outputs.prefix }} version"
          git push origin HEAD

  check-naming:
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
    - name: Checkout code
      uses: actions/checkout@v2

    - name: Check PR name
      run: |
        pr_name=$(jq -r .pull_request.title $GITHUB_EVENT_PATH)
        if [[ ! $pr_name =~ ^(feat|fix|chore|docs|misc)(\([a-zA-Z]+\))?!?:\ .*$ ]]; then
          echo "error: Pull request title must start with feat/fix/chore/docs/misc, followed by optional ! for breaking changes, followed by an optional scope in parentheses, followed by a colon, followed by a space, followed by a description."
          exit 1
        fi
  
  gh-release:
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    needs:
      - semver-check
    steps:
      - name: Create release
        uses: softprops/action-gh-release@v1
        with:
          name: "New release ${{ needs.semver-check.outputs.version }}"
          tag_name: ${{ needs.semver-check.outputs.version }}
          generate_release_notes: true
          draft: false
          prerelease: false
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

  publish-npm:
    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
    runs-on: ubuntu-latest
    needs:
      - semver-check
      - gh-release
    steps:
      - name: Set up Node.js
        uses: actions/setup-node@v2
        with:
          node-version: '18'

      - name: Install dependencies
        run: npm install

      - name: Publish to NPM
        run: npm publish
        env:
          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}