name: Build and Publish Docker Image

on:
  push:
    branches:
      - main
    tags:
      - v*

jobs:
  main:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

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

      - name: Login to Docker Hub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Get Variables
        id: get-variables
        run: |
          echo ::set-output name=version::${GITHUB_REF#refs/tags/}
          echo ::set-output name=gh-username-lower::$(echo ${{ github.repository_owner }} | tr '[:upper:]' '[:lower:]')

      - name: Build and push Image
        uses: docker/build-push-action@v2
        with:
          file: ./docker/Dockerfile
          platforms: linux/amd64,linux/arm64
          tags: ${{ steps.get-variables.outputs.gh-username-lower }}/libretranslate:${{ env.TAG }}
          push: true
          cache-from: type=gha
          cache-to: type=gha,mode=max
        env:
          TAG: ${{ startsWith(github.ref, 'refs/tags/') && steps.get-variables.outputs.version || 'latest' }}