base-legacy-image-check.yml

name: Check for newer base-legacy image every night

on:
  schedule:
    - cron: "0 0 * * *"

jobs:
  compare-base-legacy-image-tag:
    permissions: write-all
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v4

      - name: Compare base-legacy image platform and tag
        id: compare_legacy
        run: |
          # Get base-legacy SteamRT platform variant
          export STEAMRT_PLATFORM_VARIANT=$(docker compose config base-legacy | grep 'STEAMRT_PLATFORM_VARIANT' | cut -d ':' -f 2 | xargs)
          export STEAMRT_PLATFORM_VERSION=$(docker compose config base-legacy | grep 'STEAMRT_PLATFORM_VERSION' | cut -d ':' -f 2 | xargs)

          # Get image repository
          current_repository=$(eval echo $(sed -rn '/FROM /p' image/base/Dockerfile | cut -d ' ' -f 2 | cut -d ':' -f 1))

          # Use crane to list all available remote tags based on the base-legacy image tag prefix
          # https://github.com/google/go-containerregistry/tree/main/cmd/crane
          remote_tags=$(docker run --rm gcr.io/go-containerregistry/crane:v0.15.2 ls ${current_repository} | grep -v -e '[[a-z]]*')

          # Compare current tag to remote tags
          new_tag=$(python3 ./scripts/compare_tags.py "${STEAMRT_PLATFORM_VERSION}" "${remote_tags}")

          if [[ ! -z "${new_tag}" ]]; then
            echo "CI_PR_NEW_BASE_LEGACY_IMAGE_TAG=${new_tag}" >> $GITHUB_ENV
            echo "createpr_legacy=1" >> $GITHUB_OUTPUT
          else
            echo "No newer tag found."
            echo "createpr_legacy=0" >> $GITHUB_OUTPUT
          fi

      - name: Check if pull request exists for newer base-legacy image
        if: ${{ steps.compare_legacy.outputs.createpr_legacy == 1 }}
        id: checkpr_legacy
        uses: actions/github-script@v6
        with:
          script: |
            const { repo, owner } = context.repo;
            const result = await github.rest.pulls.list({
              owner,
              repo,
              head: 'actions/bump-base-legacy-image-tag',
              base: 'main',
              state: 'open'
            });

            if (result.length > 0)
            {
              return 'skip'
            }

            return 'continue'
          result-encoding: string

      - name: Set up Go
        uses: actions/setup-go@v4
        with:
          go-version: '1.21.1'

      - name: Push new branch with updated base-legacy image
        if: ${{ steps.checkpr_legacy.outputs.result == 'continue' }}
        run: |
          # Install yq
          go install github.com/mikefarah/yq/v4@latest

          # Prepare git user
          git config user.name github-actions
          git config user.email github-actions@users.noreply.github.com

          # Checkout new branch from main
          git fetch origin main
          git checkout main
          git checkout -b actions/bump-base-legacy-image-tag

          # Replace base-legacy image tag
          yq -i '.services."base-legacy".build.args.STEAMRT_PLATFORM_VERSION = strenv(CI_PR_NEW_BASE_LEGACY_IMAGE_TAG)' docker-compose.yml

          # Add, commit and push changes to the branch
          git add docker-compose.yml
          git commit -m "Bump base-legacy image tag to ${CI_PR_NEW_BASE_LEGACY_IMAGE_TAG}"
          git push origin actions/bump-base-legacy-image-tag -f

      - name: Create pull request for newer base-legacy image
        if: ${{ steps.checkpr_legacy.outputs.result == 'continue' }}
        uses: actions/github-script@v6
        with:
          script: |
            const { repo, owner } = context.repo;
            const result = await github.rest.pulls.create({
              title: `[Bump] base-legacy image tag to ${process.env.CI_PR_NEW_BASE_LEGACY_IMAGE_TAG}`,
              owner,
              repo,
              head: 'actions/bump-base-legacy-image-tag',
              base: 'main'
            });
            github.rest.issues.addLabels({
              owner,
              repo,
              issue_number: result.data.number,
              labels: ['improvement', 'bump base-legacy image tag']
            });