name: Build Branch Image

on:
  push:
    branches:
      - dev
      - staging
      - unstable

# Cancel an in-flight build for a branch if a new push arrives before it finishes — avoids wasting runner minutes racing two builds of the same branch.
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read
  packages: write

env:
  IMAGE_NAME: ghcr.io/${{ github.repository }}

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    timeout-minutes: 60
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=${{ github.ref_name == 'dev' && 'latest' || github.ref_name }}
            type=sha,format=short,prefix=${{ github.ref_name == 'dev' && 'latest' || github.ref_name }}-

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          platforms: linux/amd64,linux/arm64
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha,scope=${{ github.ref_name }}
          cache-to: type=gha,mode=max,scope=${{ github.ref_name }}
          sbom: true
          provenance: true