name: Build and push to registry

on:
  push:
    tags:
      - '*'

jobs:
  push_to_registry:
    name: Push Docker image to Docker Hub
    if: startsWith(github.ref, 'refs/tags/v')
    runs-on: ubuntu-latest
    steps:
      - name: Check out the repo
        uses: actions/checkout@v2

      - name: Get the version
        id: get_version
        run: echo ::set-output name=VERSION::${GITHUB_REF#refs/tags/v}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Cache Docker layers
        uses: actions/cache@v2
        with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.REGISTRY_LOGIN }}
          password: ${{ secrets.REGISTRY_PASSWORD }}

      - name: Push to Docker Hub
        uses: docker/build-push-action@v2
        with:
          context: .
          build-args: |
            VERSION=${{ steps.get_version.outputs.VERSION }}
          tags: |
            ${{ secrets.REGISTRY_NAME }}/twhelp-dcbot:latest
            ${{ secrets.REGISTRY_NAME }}/twhelp-dcbot:${{ steps.get_version.outputs.VERSION }}
          file: ./Dockerfile
          push: true