name: release-rules
on:
  push: 
    tags:
    - "rules-[0-9]+.[0-9]+.[0-9]+"
jobs:
  create-release:
    name: create-release
    runs-on: ubuntu-latest
    outputs:
      upload_url: ${{ steps.release.outputs.upload_url }}
      rules_version: ${{ env.RULES_VERSION }}
    steps:
      - name: Get the release version from the tag
        shell: bash
        if: env.RULES_VERSION == ''
        run: |
          echo "RULES_VERSION=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
          echo "version is: ${{ env.RULES_VERSION }}"
      - name: Create GitHub release
        id: release
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          tag_name: ${{ env.RULES_VERSION }}
          release_name: ${{ env.RULES_VERSION }}

  build-release:
    name: build-release
    needs: ['create-release']
    runs-on: ubuntu-latest
    steps:
    - name: Checkout repository
      uses: actions/checkout@v2
      with:
        fetch-depth: 1
    - name: Build release asset
      shell: bash
      run: |
        staging="bazel_ci_${{ needs.create-release.outputs.rules_version }}"
        cp -r rules "$staging"
        tar czf "$staging.tar.gz" "$staging"
        echo "ASSET=$staging.tar.gz" >> $GITHUB_ENV
    - name: Upload release asset
      uses: actions/upload-release-asset@v1.0.1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        upload_url: ${{ needs.create-release.outputs.upload_url }}
        asset_path: ${{ env.ASSET }}
        asset_name: ${{ env.ASSET }}
        asset_content_type: application/octet-stream