sync.yml

name: Sync

on:
  workflow_dispatch:
  schedule:
    - cron: "0 0 * * 5"

permissions: {}

jobs:
  sync:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    steps:
      - uses: actions/create-github-app-token@v1
        id: create_token
        with:
          app-id: ${{ secrets.APP_ID }}
          private-key: ${{ secrets.PRIVATE_KEY }}

      - uses: actions/checkout@v4
        with:
          ref: main
          fetch-depth: 0
          token: ${{ steps.create_token.outputs.token }}

      - name: Sync with upstream
        id: sync
        run: |
          echo ::group::Setting up git and gh
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          gh repo set-default ${{ github.repository }}
          echo ::endgroup::

          echo ::group::Fetching upstream
          git remote add upstream https://github.com/nostr-protocol/nips
          git fetch upstream
          echo ::endgroup::

          echo ::group::Fetching origin
          git fetch origin
          echo ::endgroup::

          echo ::group::Switching to sync branch
          git switch -c sync
          git log -1 --format=%H
          echo ::endgroup::

          echo ::group::Merging upstream to sync branch
          if ! git merge upstream/master --no-edit --commit -m "Sync with upstream"; then
            git add -A
            git commit -m "Sync with upstream including CONFLICT"
          fi
          echo ::endgroup::

          if ! git diff --quiet main; then
            echo "diff_main=1" >> $GITHUB_OUTPUT

            echo ::group::Pushing sync branch
            git push -f origin sync
            echo ::endgroup::
          else
            echo "diff_main=0" >> $GITHUB_OUTPUT
            echo "main is in sync with upstream"
          fi
        env:
          GITHUB_TOKEN: ${{ steps.create_token.outputs.token }}

      - name: Check if sync pull request exists
        id: sync_pr_existence
        run: |
          echo "count=$(gh pr list --head sync --base main | wc -l)" >> $GITHUB_OUTPUT
        env:
          GITHUB_TOKEN: ${{ steps.create_token.outputs.token }}

      - name: Create pull request if needed
        if: ${{ steps.sync_pr_existence.outputs.count == 0 && steps.sync.outputs.diff_main == 1 }}
        run: |
          gh pr create --head "sync" --base "main" --title "Sync with upstream" --body ""
        env:
          GITHUB_TOKEN: ${{ steps.create_token.outputs.token }}