name: Sync upstream

on:
  schedule:
    - cron: "17 * * * *"
  workflow_dispatch:

permissions:
  contents: write

concurrency:
  group: sync-upstream
  cancel-in-progress: false

jobs:
  sync-main:
    name: Sync main from upstream
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
          ref: main

      - name: Configure git
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"

      - name: Fetch upstream main
        run: |
          if git remote get-url upstream >/dev/null 2>&1; then
            git remote set-url upstream https://github.com/nvim-treesitter/nvim-treesitter.git
          else
            git remote add upstream https://github.com/nvim-treesitter/nvim-treesitter.git
          fi
          git fetch upstream +refs/heads/main:refs/remotes/upstream/main

      - name: Rebase fork metadata onto upstream
        run: |
          git checkout main
          git rebase refs/remotes/upstream/main

      - name: Push main
        run: git push --force-with-lease origin main