docker.yml

name: Docker

on:
  - push
  - pull_request

jobs:
  docker:
    name: Docker
    timeout-minutes: 10
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - if: github.event_name != 'pull_request'
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Configure
        id: configure
        run: |
          if [ "${GITHUB_EVENT_NAME}" = "push" ]; then
            case "${GITHUB_REF}" in
              refs/tags/*)
                version=$(echo "${GITHUB_REF}" | sed -e "s,^refs/tags/,,g")
                ;;
              *)
                version=latest
                ;;
            esac
            tags=ghcr.io/${GITHUB_REPOSITORY}:${version}
            push="true"
          else
            tags=""
            push="false"
          fi
          echo "::set-output name=tags::${tags}"
          echo "::set-output name=push::${push}"
      - uses: docker/setup-buildx-action@v1
      - uses: docker/build-push-action@v2
        with:
          context: .
          file: dockerfiles/ruby-3.0.dockerfile
          push: ${{ steps.configure.outputs.push }}
          tags: ${{ steps.configure.outputs.tags }}