name: Cloudflare Workers (Preview) Prepare

on:
  pull_request:
    branches:
      - main

  workflow_dispatch:

jobs:
  prepare:
    name: Prepare preview sources
    runs-on: ubuntu-latest

    steps:
      - name: Persist checkout metadata
        env:
          PR_NUM: ${{ github.event.number }}
          REPO_FULL_NAME: ${{ github.event.pull_request.head.repo.full_name }}
          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
        run: |
          node --input-type=module <<'NODE'
          import { writeFile } from 'node:fs/promises'

          await writeFile('preview-meta.json', JSON.stringify({
            prNumber: process.env.PR_NUM,
            repositoryFullName: process.env.REPO_FULL_NAME,
            headSha: process.env.HEAD_SHA,
          }))
          NODE

      - name: Upload metadata artifact
        uses: actions/upload-artifact@v7
        with:
          name: preview-meta
          path: ./preview-meta.json
          overwrite: true