# Workflow For Releases
#
# Automatically creates and uploads a complete release archive for the given
# release.
name: Release Workflow

# Is triggered when a new release is published or by hand
# If triggered by hand, the release tag that this should target has to be
# specified.
on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      tag:
        description: 'Release Tag'
        required: true

jobs:
  upload:
    runs-on: ubuntu-latest
    steps:
      - name: Get Version
        if: ${{ github.event.inputs.tag }} != ''
        run: |
          if [ ${{  github.event_name }} == 'workflow_dispatch' ]; then
            echo "Manual Release Triggered"
            RELEASE_TAG=${{ github.event.inputs.tag }}
          else
            echo "Automatic Release Triggered"
            RELEASE_TAG=${GITHUB_REF#refs/tags/}
          fi
          echo "Publishing Version $RELEASE_TAG"
          {
            echo "RELEASE_TAG=$RELEASE_TAG"
            echo "POLYBAR_DIR=polybar-$RELEASE_TAG"
            echo "POLYBAR_ARCHIVE=polybar-$RELEASE_TAG.tar.gz"
          } >> "$GITHUB_ENV"

      # Checks out the target tag
      - uses: actions/checkout@v2
        with:
          ref: ${{ env.RELEASE_TAG }}
          submodules: true
          path: ${{ env.POLYBAR_DIR }}

      - name: Create Release Archive
        run: |
          find "$DIR" -type d -name ".git" -exec rm -rf {} \+
          tar czf "$ARCHIVE" "$DIR"
          echo "SHA256SUM=$(sha256sum "$ARCHIVE" | cut -d ' ' -f 1)" >> "$GITHUB_ENV"
        env:
          DIR: ${{ env.POLYBAR_DIR }}
          ARCHIVE: ${{ env.POLYBAR_ARCHIVE }}

      - name: Get Upload URL
        id: get_upload_url
        uses: actions/github-script@v3
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const tag = '${{ env.RELEASE_TAG }}';
            console.log(`Getting Upload URL for '${tag}'`);
            const release = await github.repos.getReleaseByTag({
              owner: context.repo.owner,
              repo: context.repo.repo,
              tag: tag
            });
            core.exportVariable('UPLOAD_URL', release.data.upload_url);
            core.exportVariable('RELEASE_ID', release.data.id);
            core.exportVariable('RELEASE_BODY', release.data.body);

      - name: Upload Release Archive
        id: upload_archive
        uses: actions/upload-release-asset@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          upload_url: ${{ env.UPLOAD_URL }}
          asset_path: "./${{ env.POLYBAR_ARCHIVE }}"
          asset_name: ${{ env.POLYBAR_ARCHIVE }}
          asset_content_type: application/gzip

      # Adds a download section to the beginning of the release body
      - name: Update Release Body
        uses: actions/github-script@v3
        env:
          # Existing release body, fetched in the get_upload_url step.
          RELEASE_BODY: ${{ env.RELEASE_BODY }}
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fname = '${{ env.POLYBAR_ARCHIVE }}'
            const url = '${{ steps.upload_archive.outputs.browser_download_url }}'
            const hash = '${{ env.SHA256SUM }}'
            let body = "## Download:\n\n"
            body += `[${fname}](${url}) (**sha256**: \`${hash}\`)\n\n`
            body += process.env.RELEASE_BODY;

            const release = await github.repos.updateRelease({
              owner: context.repo.owner,
              repo: context.repo.repo,
              release_id: '${{ env.RELEASE_ID}}',
              body: body
            });