docker.yml

name: Build Docker image

on: [push]

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

jobs:
  docker:
    runs-on: ubuntu-latest
    permissions:
      packages: write
      contents: read
    steps:
      - name: Check out the repo
        uses: actions/checkout@v4
      # Setup Docker
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v3
      - name: Log in to GitHub Docker Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      # Setup build cache
      - name: Cache Docker layers
        uses: actions/cache@v4
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-single-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-single-buildx
      - name: Ensure we are up to date on all images
        run: docker pull amazoncorretto:21-alpine
      - name: Build container image
        uses: docker/build-push-action@v6
        with:
          context: docker
          push: true
          load: false
          builder: ${{ steps.buildx.outputs.name }}
          cache-from: type=local,src=/tmp/.buildx-cache
          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
          build-args: |
            GIT_REVISION=${{ github.sha }}
          tags: |
            ghcr.io/foxbukkit/packages/server:latest
      # https://github.com/docker/build-push-action/issues/252 (prevent cache from growing indefinitely)
      - name: Move cache
        run: |
          rm -rf /tmp/.buildx-cache
          mv /tmp/.buildx-cache-new /tmp/.buildx-cache