fetch_latest_release_info.yml

name: Fetch Latest GitHub Release Info
on:
  repository_dispatch:
  push:
    branches:
      - 'master'
    paths:
      - '.github/workflows/fetch_latest_release_info.yml'
  pull_request:
    branches:
      - 'master'
    paths:
      - '.github/workflows/fetch_latest_release_info.yml'

jobs:
  build:
    concurrency: fetch-latest-release-info
    name: 'Fetch Latest GitHub Release Info'
    runs-on: ubuntu-latest
    if: (github.event_name == 'repository_dispatch' && github.event.action == 'github_release_update') || github.event_name != 'repository_dispatch'
    steps:
      - uses: actions/checkout@v4
        with:
          ref: master
          persist-credentials: false
      - name: Download latest GitHub Release info
        uses: past-due/fetch-release-info@master
        with:
          github_repo: 'Warzone2100/warzone2100'
          github_token: '${{ secrets.GITHUB_TOKEN }}'
          calculate_asset_info: true
          output_directory: 'data/github_releases_info'
          cache_directory: '_tmp_cache_data/github_releases_info'
      - name: Install mktorrent
        run: |
          sudo apt-get update -y
          sudo apt-get install -y mktorrent
      - name: Generate .torrent files for latest release assets
        id: generate-torrent
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          tmp_dl_path="${HOME}/release_assets"
          if [ ! -d "${tmp_dl_path}" ]; then
            mkdir -p "${tmp_dl_path}"
          fi
        
          tag_name="$(cat "data/github_releases_info/latest.json" | jq -r '.tag_name')"
          torrent_output_dir="static/download/wz"

          if [ ! -d "${torrent_output_dir}" ]; then
            mkdir -p "${torrent_output_dir}"
          fi

          cat "data/github_releases_info/latest.json" | jq -r '.assets[] | [.name, .url, .browser_download_url] | @tsv' |
          while IFS=$'\t' read -r github_release_asset_name github_release_asset_url github_release_asset_browser_download_url; do

            echo "********************************************"
            echo "* [${github_release_asset_name}]"
            echo "********************************************"

            # Explicitly ignore release assets with "DEBUGSYMBOLS" in name
            if [[ "${github_release_asset_name}" == *DEBUGSYMBOLS* ]]; then
              echo "Skipping .torrent generation for release asset: ${github_release_asset_name} (reason: DEBUGSYMBOLS)"
              continue
            fi
            
            asset_dl_path="${tmp_dl_path}/${github_release_asset_name}"

            # Download release asset from GitHub
            curl -H "Accept: application/octet-stream" -H "Authorization: token ${GITHUB_TOKEN}" -Lf -o "${asset_dl_path}" "${github_release_asset_url}"
            CURL_RETURN_CODE=$?
            if [ "${CURL_RETURN_CODE}" -ne 0 ]; then
              echo "curl failed for: ${github_release_asset_name}"
              continue
            fi

            # Get filesize in kb
            filesize_in_kb=$(du -k "${asset_dl_path}" | cut -f1)
            if [ "${filesize_in_kb}" -lt 25000 ]; then
              # Ignore smaller release assets
              echo "Skipping .torrent generation for release asset: ${github_release_asset_name} (reason: too small)"
              rm "${asset_dl_path}"
              continue
            fi
  
            # Calculate SourceForge alternative download URL
            sf_webseed_url="https://downloads.sourceforge.net/project/warzone2100/releases/${tag_name}/${github_release_asset_name}"
            echo "sf_webseed_url=${sf_webseed_url}"

            # Generate torrent name
            prefix="warzone2100_"
            torrent_name=${github_release_asset_name#"$prefix"}
            torrent_name="${prefix}${tag_name}_${torrent_name}"
            echo "torrent_name=${torrent_name}"
            torrent_output_file="${torrent_output_dir}/${github_release_asset_name}.torrent"
  
            # Clear any old .torrent file by this name
            if [ -f "${torrent_output_file}" ]; then
              rm "${torrent_output_file}"
            fi
  
            # Generate .torrent file
            env -u GITHUB_TOKEN mktorrent -v -a http://tracker.opentrackr.org:1337/announce -c "${github_release_asset_name} (${tag_name})" -n "${torrent_name}" --no-date -w "${github_release_asset_browser_download_url}" -w "${sf_webseed_url}" -o "${torrent_output_file}" "${asset_dl_path}"

            # Remove the downloaded asset
            rm "${asset_dl_path}"
          done
      - name: Commit any changes to data files
        if: github.event_name == 'repository_dispatch' || (github.event_name == 'push' && (github.ref == 'refs/heads/master'))
        env:
          PUSH_PAT: ${{ secrets.WZ2100_PUSH_SECRET_TOKEN }} # use a PAT so that subsequent workflows are triggered on push
        run: |
          git config user.name "wzdev-ci"
          git config user.email "61424532+wzdev-ci@users.noreply.github.com"
          git add -A
          timestamp=$(date -u)
          git commit -m "Automated update of GitHub Releases data: ${timestamp}" || exit 0
          git pull --rebase
          git push "https://${PUSH_PAT}@github.com/Warzone2100/wz2100.net.git" master:master