hapistrano/.github/workflows/reusable-docker.yml

---
name: Docker

on:
  workflow_call:
    inputs:
      push:
        type: boolean
        required: true

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      packages: write

    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Cache Docker layers
        uses: actions/cache@v3
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: ${{ runner.os }}-buildx-
      - name: Login to ghcr.io
        if: ${{ inputs.push }}
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: ghcr.io/${{ github.repository }}
      - name: Build and/or push Docker image
        uses: docker/build-push-action@v3
        with:
          context: .
          load: ${{ !inputs.push }}
          push: ${{ inputs.push }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max
      - name: Smoke test
        if: ${{ !inputs.push }}
        run: docker run ghcr.io/${{ github.repository }} --version
      - name: Move cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache