release.yml

name: "Release Workflow"
on:
  push:
    branches:
      - 'releases/v1.6'
      - 'master'

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2.4.0

      - name: read versions
        id: read-version
        run: |
          echo ::set-output name=version::$(jq -r ".version" package.json)
          echo ::set-output name=tag::v$(jq -r ".version" package.json)
          echo ::set-output name=major_tag::v$(jq -r ".version" package.json | cut -d '.' -f 1)
        
      - name: read changelog entry for version
        id: changelog_reader
        uses: mindsers/changelog-reader-action@v2
        with:
          version: "${{ steps.read-version.outputs.tag }}"
          path: ./CHANGELOG.md

      - name: check for existing release
        id: check_release
        run: |
          TAG=$(git ls-remote --tags origin | grep ${{ steps.read-version.outputs.tag }} || [[ $? == 1 ]] && echo '')
          MISSING=$([[ -z "$TAG" ]] && echo 'true' || echo 'false')
          echo ::set-output name=missing::$MISSING
        
      - name: create release
        if: ${{ steps.check_release.outputs.missing == 'true' }}
        id: create_release
        uses: actions/create-release@v1.1.4
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: "${{ steps.read-version.outputs.tag }}"
          release_name: Changelog Enforcer ${{ steps.read-version.outputs.version }}
          body: ${{ steps.changelog_reader.outputs.changes }} 
          draft: false
          prerelease: false

      - name: update major version tag
        uses: richardsimko/update-tag@v1
        with:
          tag_name: "${{ steps.read-version.outputs.major_tag }}"
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}