name: CI

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

env:
  CARGO_TERM_COLOR: always
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
  UBUNTU_DOCKERFILE: .github/workflows/ubuntu.dockerfile

permissions:
  contents: read
  packages: read

jobs:
  check-should-build-container:
    runs-on: ubuntu-latest
    permissions:
      pull-requests: read
      contents: read
    steps:
      - if: ${{ github.event_name == 'push' }}
        uses: actions/checkout@v4
        with:
          fetch-depth: 2
          sparse-checkout: .github
      - id: changed
        uses: tj-actions/changed-files@v45
        with:
          files: ${{ env.UBUNTU_DOCKERFILE }}
      - id: name
        run: echo "container_path=${{ env.REGISTRY }}/${GITHUB_REPOSITORY@L}" >> "$GITHUB_OUTPUT"
    outputs:
      should-build: ${{ steps.changed.outputs.any_changed }}
      container-path: ${{ steps.name.outputs.container_path }}

  ubuntu-build:
    runs-on: ubuntu-latest
    needs: check-should-build-container
    if: ${{ needs.check-should-build-container.outputs.should-build == 'true' }}
    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
      - uses: docker/setup-buildx-action@v3
      - uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - uses: docker/build-push-action@v6
        with:
          file: ${{ env.UBUNTU_DOCKERFILE }}
          push: true
          tags: ${{ needs.check-should-build-container.outputs.container-path }}-ubuntu:latest
          labels: org.opencontainers.image.source=${{ github.server_url }}/${{ github.repository }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

  build:
    needs: [ubuntu-build, check-should-build-container]
    if: ${{ always() && (needs.ubuntu-build.result == 'success' || needs.ubuntu-build.result == 'skipped') }}
    runs-on: ubuntu-latest
    container:
      image: ${{ needs.check-should-build-container.outputs.container-path }}-ubuntu:latest
      credentials:
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}
    steps:
    - uses: actions/checkout@v4
    - name: Build
      run: cargo build --release --verbose
    - name: Run tests
      run: cargo test --verbose
    - name: Format check
      run: cargo fmt --check
    - name: Clippy
      run: cargo clippy