docker-branch.yml

name: Branch Test Docker Image

on:
  workflow_dispatch:
  push:
    branches:
      - "test/**"

permissions:
  contents: read
  packages: write

concurrency:
  group: docker-branch-${{ github.ref }}
  cancel-in-progress: true

jobs:
  branch-image:
    if: startsWith(github.ref_name, 'test/')
    name: Build and push branch-scoped test image
    runs-on: ubuntu-latest

    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 GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Prepare image name
        id: image
        shell: bash
        run: echo "name=ghcr.io/${GITHUB_REPOSITORY,,}" >> "$GITHUB_OUTPUT"

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v6
        with:
          images: ${{ steps.image.outputs.name }}
          flavor: latest=false
          tags: |
            type=ref,event=branch,prefix=branch-
            type=sha,prefix=sha-

      - name: Build and push branch Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max