docker.yml

name: docker
on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
    paths:
      - Dockerfile
      - .github/workflows/docker.yml
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: docker/setup-buildx-action@v2
      - if: github.ref == 'refs/heads/main'
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_TOKEN }}
      - name: determine tags
        id: tags
        run: |
          DOCKER_IMAGE=lyft/clutch
          VERSION=latest
          TAGS="${DOCKER_IMAGE}:${VERSION}"
          TAGS="$TAGS,${DOCKER_IMAGE}:sha-${GITHUB_SHA::7}"
          echo "tags=${TAGS}" >>${GITHUB_OUTPUT}
      - name: build and push
        if: github.ref == 'refs/heads/main'
        uses: docker/build-push-action@v4.1.1
        with:
          tags: ${{ steps.tags.outputs.tags }}
          push: true
          cache-from: type=registry,ref=lyft/clutch:latest
      - name: build
        if: github.ref != 'refs/heads/main'
        uses: docker/build-push-action@v4.1.1
        with:
          tags: ${{ steps.tags.outputs.tags }}
          push: false
          cache-from: type=registry,ref=lyft/clutch:latest