name: Publish server Docker image

on:
  push:
    branches: ["main"]
    tags: ["*"]
  pull_request:
    branches: ["main"]

jobs:
  publish-docker:
    runs-on: ubuntu-docker

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Extract registry hostname
        id: registry
        run: echo "host=$(echo '${{ github.server_url }}' | sed 's|https\?://||')" >> "$GITHUB_OUTPUT"

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log into container registry
        if: github.ref_type == 'tag'
        uses: docker/login-action@v3
        with:
          registry: ${{ steps.registry.outputs.host }}
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ steps.registry.outputs.host }}/${{ github.repository }}

      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v5
        with:
          context: sync-server
          platforms: linux/amd64,linux/arm64
          push: ${{ github.ref_type == 'tag' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=registry,ref=${{ steps.registry.outputs.host }}/${{ github.repository }}:buildcache
          cache-to: type=registry,ref=${{ steps.registry.outputs.host }}/${{ github.repository }}:buildcache,mode=max