name: Docker Image

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

env:
  # Gitea container registry: <server>/<owner>/<repo>
  IMAGE: ${{ gitea.server_url }}/${{ gitea.repository }}

jobs:
  build-docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

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

      - name: Login to Gitea Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ gitea.server_url }}
          username: ${{ gitea.actor }}
          password: ${{ secrets.GITEA_TOKEN }}

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.IMAGE }}
          tags: |
            type=raw,value=latest,enable={{is_default_branch}}
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}

      - name: Build and push (CPU)
        uses: docker/build-push-action@v6
        with:
          context: .
          file: docker/Dockerfile.ci
          platforms: linux/amd64
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max