name: Docker publish rootless ARM

on:
  schedule:
    - cron: '00 0 * * *'
  push:
    branches: [ "main" ]
    paths:
      - 'backend/**'
      - 'frontend/**'
      - 'Dockerfile'
      - 'Dockerfile.rootless'
      - '.dockerignore'
      - '.github/workflows'
    # Publish semver tags as releases.
    tags: [ 'v*.*.*' ]
  pull_request:
    branches: [ "main" ]
    paths:
      - 'backend/**'
      - 'frontend/**'
      - 'Dockerfile'
      - 'Dockerfile.rootless'
      - '.dockerignore'
      - '.github/workflows'

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-rootless:

    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      # Step 1: Checkout repository
      - name: Checkout repository
        uses: actions/checkout@v4

      # Step 2: Set up Buildx without specifying driver
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3.0.0
        with:
          install: true  # Ensure Buildx is installed and set up properly
          use: true      # Use Buildx instance directly for this job

      # Step 3: Login to Docker registry except on PR
      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3.0.0
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Step 4: Extract metadata for Docker images
      - name: Extract Docker metadata
        id: metadata
        uses: docker/metadata-action@v5.0.0
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=schedule,pattern=nightly
          flavor: |
            suffix=-rootless-arm,onlatest=true

      # Step 5: Build and push the Docker image
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v5.0.0
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.metadata.outputs.tags }}
          labels: ${{ steps.metadata.outputs.labels }}
          platforms: linux/arm64,linux/arm/v7
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            VERSION=${{ github.ref_name }}
            COMMIT=${{ github.sha }}

      # Step 6: Attest built image to prove build provenance
      - name: Attest
        uses: actions/attest-build-provenance@v1
        id: attest
        if: ${{ github.event_name != 'pull_request' }}
        with:
          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          subject-digest: ${{ steps.build-and-push.outputs.digest }}
          push-to-registry: true