autorelease.yml

# Automatically Create a Release when PR is merged to main with one of the following
# labels: "patch", "minor", "major", "alpha", "beta", "rc".

name: Auto Release

# Controls when the action will run.
on:
  # Triggers the workflow only when merging pull request to the main branch.
  pull_request:
    types: [closed]
    branches: [ main ]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

jobs:
  # This workflow contains a single job called "build"
  build:
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Only run on merged PRs with an appropriate label.
    if: |
      github.event.pull_request.merged &&
      (
        contains(github.event.pull_request.labels.*.name, 'patch') ||
        contains(github.event.pull_request.labels.*.name, 'minor') ||
        contains(github.event.pull_request.labels.*.name, 'major') ||
        contains(github.event.pull_request.labels.*.name, 'alpha') ||
        contains(github.event.pull_request.labels.*.name, 'beta') ||
        contains(github.event.pull_request.labels.*.name, 'rc')
      )

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2
        with:
          ref: ${{ github.base_ref }}
          fetch-depth: 0

      - name: Setup node
        uses: actions/setup-node@v2
        with:
          node-version-file: '.nvmrc'

      # Uses 'npm ci' instead of 'npm install'. See https://docs.npmjs.com/cli/v7/commands/npm-ci
      - name: Install dependencies
        run: npm ci

      - name: Set Git user
        run: |
          git config --global user.email "action@github.com"
          git config --global user.name "Github Action"

      # Increment version based on label
      - name: Patch Release tag
        if: ${{ contains( github.event.pull_request.labels.*.name, 'patch') }}
        run: npm version patch

      - name: Minor Release tag
        if: ${{ contains( github.event.pull_request.labels.*.name, 'minor') }}
        run: npm version minor

      - name: Major Release tag
        if: ${{ contains( github.event.pull_request.labels.*.name, 'major') }}
        run: npm version major

      - name: Alpha Release tag
        if: ${{ contains( github.event.pull_request.labels.*.name, 'alpha') }}
        run: |
          npm version prerelease --preid alpha
          echo "PRERELEASE=true" >> $GITHUB_ENV

      - name: Beta Release tag
        if: ${{ contains( github.event.pull_request.labels.*.name, 'beta') }}
        run: |
          npm version prerelease --preid beta
          echo "PRERELEASE=true" >> $GITHUB_ENV

      - name: RC Release tag
        if: ${{ contains( github.event.pull_request.labels.*.name, 'rc') }}
        run: |
          npm version prerelease --preid rc
          echo "PRERELEASE=true" >> $GITHUB_ENV

      # Push commits back to origin repo.
      - name: Push Changes
        uses: ad-m/github-push-action@master
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          branch: ${{ github.base_ref }}
          tags: true

      - name: Set enviroment variables for release notes.
        run: |
          echo "RELEASE_TAG=$(git tag --sort=-taggerdate | head -1)" >> $GITHUB_ENV
          echo "PREVIOUS_TAG=$(git tag --sort=-taggerdate | sed -n '2 p')" >> $GITHUB_ENV

      - name: Create Release Notes
        id: release_notes
        run: |
          # Scrape release notes for this release from the full changelog.
          release_notes=$(./node_modules/.bin/auto-changelog --stdout | awk "/\[$RELEASE_TAG\]/{flag=1; next} /\[$PREVIOUS_TAG\]/{flag=0} flag")
          # Escape whitespace characters to ensure that multiline content outputs correctly.
          release_notes="${release_notes//'%'/'%25'}"
          release_notes="${release_notes//$'\n'/'%0A'}"
          releast_notes="${release_notes//$'\r'/'%0D'}"
          # Expose the release notes as an output variable.
          echo "::set-output name=release_notes::$release_notes"

      - name: Update Github Release with changelog notes.
        uses: meeDamian/github-release@2.0
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          tag: ${{ env.RELEASE_TAG }}
          body: ${{steps.release_notes.outputs.release_notes}}
          allow_override: true
          prerelease: ${{ env.PRERELEASE }}

      # Publish updated package to NPM.
      - name: Publish to NPM
        uses: JS-DevTools/npm-publish@v1
        with:
          token: ${{ secrets.NPM_TOKEN }}
          access: "public"