Github action workflow to manage versioning upon pull request to a branch

version-release.yml

# This is a workflow to update version of of an application
name: Version-release

on:
  # Run this workflow only if PR to master branch is closed
  pull_request:
    types: [closed]
    branches:
      - master
  # Also enable manual trigger workflow run
  workflow_dispatch:

jobs:
  # Job for updating version
  update-version:
    # Run this job if the PR has been merged & closed not only closed
    if: github.event.pull_request.merged == true
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    steps:
      # Associate each release label with semver
      - name: Set major release
        if: contains(github.event.pull_request.labels.*.name, 'release-major')
        run: echo "RELEASE=major" >> $GITHUB_ENV
      - name: Set minor release
        if: contains(github.event.pull_request.labels.*.name, 'release-minor')
        run: echo "RELEASE=minor" >> $GITHUB_ENV
      - name: Set patch release
        if: contains(github.event.pull_request.labels.*.name, 'release-patch')
        run: echo "RELEASE=patch" >> $GITHUB_ENV
      # Check here if release label is not set on pull request
      - name: Check release env
        # Use pipe symbol | to do multiline commands
        run: |
          if [[ -z "${{ env.RELEASE }}" ]];
          then
            echo "Release label is not set on this PR. You need to set release label on PRs in order to continue."
            exit 1
          else
            exit 0
          fi
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2
        with:
          ref: master
      # Install semver tool
      - name: Install semver-tool
        run: |
          export DIR=$(mktemp -d)
          cd $DIR
          curl https://github.com/fsaintjacques/semver-tool/archive/3.2.0.tar.gz -L -o semver.tar.gz
          tar -xvf semver.tar.gz
          sudo cp semver-tool-3.2.0/src/semver /usr/local/bin
      # Install jq
      - name: Install jq
        run: |
          sudo apt-get update
          sudo apt-get install jq
      # Get CURRENT from __version file then increment new version
      - name: Bump version
        run: |
          export CURRENT=$(head -1 __version | xargs  )
          export NEW_VERSION=$(semver bump ${{ env.RELEASE }} $CURRENT)
          echo "VERSION=$NEW_VERSION" >> $GITHUB_ENV
      # Update __version
      - name: Prepare __version
        run: |
          echo "${{ env.VERSION }}" > "__version"
      # Use jq to update manifest.json
      - name: Prepare manifest
        run: |
          jq '.version="${{ env.VERSION }}"' public/manifest.json > manifest.json.tmp
          mv manifest.json.tmp public/manifest.json
      # Update CHANGELOG with pull request contents
      - name: Prepare CHANGELOG
        run: |
          echo "${{ github.event.pull_request.body }}" | csplit -s - "/##/"
          echo "# Changelog

          ## ${{ env.VERSION }}
          " >> CHANGELOG.tmp
          grep "-" xx01 >> CHANGELOG.tmp
          grep -v "^# " CHANGELOG.md >> CHANGELOG.tmp
          cp CHANGELOG.tmp CHANGELOG.md
      # Upload artifacts to be used in 'build'
      - run: echo "🥇 Update version is finished with artifacts."
      - uses: actions/upload-artifact@v2
        with:
          name: version_file
          path: __version
      - uses: actions/upload-artifact@v2
        with:
          name: changelog_file
          path: CHANGELOG.md
      - uses: actions/upload-artifact@v2
        with:
          name: manifest_file
          path: public/manifest.json

  # Job to build application and push to default branch
  build:
    # This job will only run if job 'update-version' is completed
    needs: update-version
    runs-on: ubuntu-latest

    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2
        with:
          ref: master
      - name: Using Node.js ${{ matrix.node-version }}
        uses: actions/setup-node@v2
        with:
          node-version: ${{ matrix.node-version }}
      - name: Run install
        run: npm install
      - name: Run build
        run: npm run build
      - run: echo "🍏 Build has finished"
      # Download artifacts created in 'update-version'
      - uses: actions/download-artifact@v2
        with:
          name: version_file
      - uses: actions/download-artifact@v2
        with:
          name: changelog_file
      - uses: actions/download-artifact@v2
        with:
          name: manifest_file
          path: public
      # Git commit and push
      - name: Git commit build
        run: |
          export VERSION=$(head -1 __version | xargs)
          git config --local user.email <YOUR_EMAIL_HERE>
          git config --local user.name "github-actions[bot]"
          git add .
          git commit -m "[Build] Creating build files for $VERSION"
          git tag $VERSION
      # Push to protected branch
      - name: Push Changes
        uses: CasperWA/push-protected@v2
        with:
          # For protected branch needs to use Personal Access Token
          token: ${{ secrets.TOKEN }}
          tags: True
          branch: master