name: Build & Release
on:
  push:
    branches:
      - "*"
  pull_request:
    branches:
      - main
permissions:
  contents: write
  pull-requests: write
  packages: write
env:
  # login to docker hub with provided secrets
  REGISTRY: docker.io
  REGISTRY_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
  REGISTRY_PASSWORD: ${{ secrets.DOCKERHUB_TOKEN }}
  IMAGE_NAME: ${{ vars.DOCKERHUB_TAG }}
  # For release-please, see available types at https://github.com/google-github-actions/release-please-action/tree/v4/?tab=readme-ov-file#release-types-supported
  PROJECT_TYPE: simple
jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - id: rp
        if: github.event_name != 'pull_request' && github.ref_name == 'main'
        uses: google-github-actions/release-please-action@v4
        with:
          release-type: ${{ env.PROJECT_TYPE }}
      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ env.REGISTRY_USERNAME }}
          password: ${{ env.REGISTRY_PASSWORD }}
      - name: Prepare tags for Docker meta
        id: tags
        env:
          # When release please is skipped, these values will be empty
          is_release: ${{ steps.rp.outputs.release_created }}
          version: v${{ steps.rp.outputs.major }}.${{ steps.rp.outputs.minor }}.${{ steps.rp.outputs.patch }}
        run: |
          tags=""
          if [[ "$is_release" = 'true' ]]; then
            tags="type=semver,pattern={{version}},value=$version
            type=ref,event=branch,value=main"
          else
            tags="type=ref,event=branch
            type=ref,event=pr"
          fi
          {
            echo 'tags<<EOF'
            echo "$tags"
            echo EOF
          } >> "$GITHUB_OUTPUT"
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: ${{ steps.tags.outputs.tags }}
      # necessary for multi-platform images
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      # necessary for multi-platform images
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      - name: Build and push
        uses: docker/build-push-action@v5
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/amd64,linux/arm64,linux/arm/v7
          cache-from: type=gha
          cache-to: type=gha,mode=max
