name: Diagnose GitHub mirror

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  diagnose:
    runs-on: ubuntu-latest
    steps:
      - name: Check source and credentials
        env:
          GH_TOKEN: ${{ secrets.GH_TOKEN }}
        run: |
          set -eu
          echo "Triggered ref: $GITHUB_REF"
          echo "Source commit: $GITHUB_SHA"
          if [ -z "$GH_TOKEN" ]; then
            echo "ERROR: GH_TOKEN is empty or unavailable"
            exit 1
          fi
          echo "GitHub token is present"
          git --version