name: CI image

# Builds the Arch image that ci.yml runs in, with the build dependencies preinstalled.
# Rebuilt weekly to pick up Arch updates.
on:
  push:
    branches: [main]
    paths: ['.gitea/ci-image/**', '.gitea/workflows/ci-image.yml']
  schedule:
    - cron: '0 3 * * 1'
  workflow_dispatch:

jobs:
  image:
    # The build runs on the runner's own Docker daemon, so the amd64 runner has the new
    # image locally right away. It does not re-pull tags it already has.
    runs-on: amd64
    env:
      IMAGE: git.trivk.dev/tri/qtpotato-ci:latest
    steps:
      - uses: actions/checkout@v4
      - name: Build
        run: docker build --pull -t "$IMAGE" .gitea/ci-image
      - name: Push
        # Gitea's Actions token cannot push to the container registry, so this uses an
        # access token with the write:package scope.
        env:
          TOKEN: ${{ secrets.PACKAGES_TOKEN }}
        run: |
          echo "$TOKEN" | docker login git.trivk.dev -u "${{ github.repository_owner }}" --password-stdin
          docker push "$IMAGE"