release.yml

name: Release

on:
  push:
    branches:
      - main

jobs:
  publish-github:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Extract version
        id: version
        run: |
          OLD_VERSION=$(git describe --tags --abbrev=0)
          NEW_VERSION_NUMBER_ONLY=$(node -p 'require("./package.json").version')
          NEW_VERSION=v${NEW_VERSION_NUMBER_ONLY}
          echo "OLD_VERSION=$OLD_VERSION" >> $GITHUB_ENV
          echo "NEW_VERSION=$NEW_VERSION" >> $GITHUB_ENV
          if [ "$NEW_VERSION" != "$OLD_VERSION" ]; then
            echo "New version $NEW_VERSION detected"
            echo "version=$NEW_VERSION" >> $GITHUB_OUTPUT
            git log "$OLD_VERSION"..HEAD --pretty=format:"* %s" --invert-grep --grep="$NEW_VERSION_NUMBER_ONLY" > CHANGELOG.md
          else
            echo "Version $OLD_VERSION hasn't changed, skipping the release"
          fi

      - name: Create a git tag
        if: env.NEW_VERSION != env.OLD_VERSION
        run: git tag $NEW_VERSION && git push --tags

      - name: GitHub release
        if: env.NEW_VERSION != env.OLD_VERSION
        uses: actions/create-release@v1
        id: create_release
        with:
          draft: false
          prerelease: false
          release_name: ${{ env.NEW_VERSION }}
          tag_name: ${{ env.NEW_VERSION }}
          body_path: CHANGELOG.md
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}