name: Update Latest Buildable

on:
  workflow_dispatch:
    inputs:
      ref:
        description: "Buildable ref, for example buildable/v0.5.0"
        required: true
        type: string
  push:
    tags:
      - "buildable/*"

permissions:
  contents: write

jobs:
  update-latest-buildable:
    runs-on: ubuntu-latest

    steps:
      - name: Resolve buildable ref
        id: buildable
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            echo "ref=${{ inputs.ref }}" >> "$GITHUB_OUTPUT"
          else
            echo "ref=${GITHUB_REF_NAME}" >> "$GITHUB_OUTPUT"
          fi

      - name: Checkout master
        uses: actions/checkout@v4
        with:
          ref: master

      - name: Update latestBuildable
        run: |
          python3 - <<'PY'
          import json
          from pathlib import Path

          ref = "${{ steps.buildable.outputs.ref }}"
          index_path = Path("registry/index.json")

          index = json.loads(index_path.read_text(encoding="utf-8"))

          index["partner"]["latestBuildable"] = {
              "url": "https://github.com/slhaf/Partner.git",
              "ref": ref
          }

          index_path.write_text(
              json.dumps(index, ensure_ascii=False, indent=2) + "\n",
              encoding="utf-8"
          )
          PY

      - name: Commit registry update
        run: |
          if git diff --quiet registry/index.json; then
            echo "No latestBuildable changes."
            exit 0
          fi

          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

          git add registry/index.json
          git commit -m "chore(registry): update latest buildable to ${{ steps.buildable.outputs.ref }}"
          git push