name: CI

on:
  push:
  pull_request:
  workflow_dispatch:

jobs:
  publish_docker:
    runs-on: ubuntu-latest
    name: 'Publish / Docker Hub'
    if: github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/'))
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      # https://github.com/docker/metadata-action#semver
      - id: meta
        name: Docker Hub metadata
        uses: docker/metadata-action@v4
        with:
          images: egortensin/wg-api-web
          flavor: |
            latest=auto
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v2
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
      - name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          username: egortensin
          password: '${{ secrets.DOCKERHUB_TOKEN }}'
      - id: platforms
        name: Which platforms?
        # Building for ARM for every commit in master is too time-consuming.
        run: |
          if [ '${{ github.ref }}' = 'refs/heads/master' ]; then
              echo '::set-output name=platforms::linux/amd64'
          else
              echo '::set-output name=platforms::linux/amd64,linux/armhf'
          fi
      - name: Build and publish
        uses: docker/build-push-action@v3
        with:
          labels: '${{ steps.meta.outputs.labels }}'
          platforms: '${{ steps.platforms.outputs.platforms }}'
          push: true
          tags: '${{ steps.meta.outputs.tags }}'