name: "Upstream Sync"

on:
  schedule:
    - cron: "0 30 * * *"
  workflow_dispatch:

jobs:

  sync:
    name: Sync with upstream
    runs-on: ubuntu-latest

    outputs:
      has_new_commits: ${{ steps.sync.outputs.has_new_commits }}

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2
        with:
          ref: sync/master

      - name: Sync changes with upstream
        id: sync
        uses: aormsby/Fork-Sync-With-Upstream-action@v3.2
        with:
          target_sync_branch: sync/master
          target_repo_token: ${{ secrets.GITHUB_TOKEN }}
          upstream_sync_branch: master
          upstream_sync_repo: alexta69/metube

      - name: New commits found
        if: steps.sync.outputs.has_new_commits == 'true'
        run: echo "New commits were found to sync."

      - name: No new commits found
        if: steps.sync.outputs.has_new_commits == 'false'
        run: echo "There were no new commits."

  pr:
    name: Create PR for upstream changes
    runs-on: ubuntu-latest
    needs: sync
    if: needs.sync.outputs.has_new_commits == 'true'

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2
        with:
          ref: master

      - name: Reset sync/master branch
        run: |
          git fetch origin sync/master:sync/master
          git reset --hard sync/master

      - name: Create pull request
        uses: peter-evans/create-pull-request@v3
        with:
          branch: upstream-changes
          title: "[sync] Changes from upstream"
          body: |
            Auto-generated by [create-pull-request](https://github.com/peter-evans/create-pull-request)
          labels: |
            automated
          delete-branch: true