name: Publish draft release

on:
  push:
    tags:
      - v**.**.**

jobs:
  get-rust-versions:
    runs-on: ubuntu-latest
    container:
      image: paritytech/ci-linux:production
    outputs:
      rustc-stable: ${{ steps.get-rust-versions.outputs.stable }}
      rustc-nightly: ${{ steps.get-rust-versions.outputs.nightly }}
    steps:
      - id: get-rust-versions
        run: |
          echo "::set-output name=stable::$(rustc +stable --version)"
          echo "::set-output name=nightly::$(rustc +nightly --version)"

  publish-draft-release:
    runs-on: ubuntu-latest
    needs: get-rust-versions
    outputs:
      release_url: ${{ steps.create-release.outputs.html_url }}
    steps:
    - uses: actions/checkout@v2
      with:
        fetch-depth: 0
        path: polkadot
    - name: Set up Ruby 2.7
      uses: actions/setup-ruby@v1
      with:
        ruby-version: 2.7
    - name: Generate release text
      env:
        RUSTC_STABLE: ${{ needs.get-rust-versions.outputs.rustc-stable }}
        RUSTC_NIGHTLY: ${{ needs.get-rust-versions.outputs.rustc-nightly }}
      run: |
        gem install changelogerator git toml
        ruby $GITHUB_WORKSPACE/polkadot/scripts/github/generate_release_text.rb > release_text.md
    - uses: actions/upload-artifact@v2
      with:
        name: release_text
        path: release_text.md
    - name: Create draft release
      id: create-release
      uses: actions/create-release@v1
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        tag_name: ${{ github.ref }}
        release_name: Polkadot ${{ github.ref }}
        body_path: ./release_text.md
        draft: true

  post_to_matrix:
    runs-on: ubuntu-latest
    needs: publish-draft-release
    steps:
      - name: Internal polkadot channel
        uses: s3krit/matrix-message-action@v0.0.2
        with:
          room_id: ${{ secrets.INTERNAL_POLKADOT_MATRIX_ROOM_ID }}
          access_token: ${{ secrets.MATRIX_ACCESS_TOKEN }}
          message: "**New version of polkadot tagged**: ${{ github.ref }}<br/>Gav: Draft release created: ${{ needs.publish-draft-release.outputs.release_url }}"
          server: "matrix.parity.io"