name: Release

# Runs on every push to main.
# release-please analyses conventional commits since the last release and either:
#   • creates/updates a "Release PR" that bumps pyproject.toml + CHANGELOG.md, or
#   • (when that PR is merged) tags the repo and creates a GitHub Release.
# Only when a GitHub Release is actually created does the publish job run.

on:
  push:
    branches:
      - main

permissions:
  contents: write
  pull-requests: write
  packages: write

jobs:
  release-please:
    runs-on: ubuntu-latest
    outputs:
      release_created: ${{ steps.release.outputs.release_created }}
      tag_name: ${{ steps.release.outputs.tag_name }}
    steps:
      - uses: googleapis/release-please-action@v4
        id: release
        with:
          release-type: python

  publish:
    needs: release-please
    if: needs.release-please.outputs.release_created == 'true'
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

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

      - name: Log in to GHCR
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}
          tags: |
            # semver tag  →  ghcr.io/…/steward:1.2.3
            type=raw,value=${{ needs.release-please.outputs.tag_name }}
            # always push latest on a real release
            type=raw,value=latest

      - name: Build and push
        uses: docker/build-push-action@v7
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}