name: Automatic Maintenance

on:
  # Allow manual triggers.
  workflow_dispatch:

  # Automatically run once a week.
  schedule:
    - cron: "0 7 * * SUN"

jobs:
  update-npm:
    name: "Update NPM packages"
    runs-on: ubuntu-latest

    permissions:
      contents: write
      pull-requests: write

    steps:
      - uses: actions/checkout@v3
        with:
          ref: main

      - name: Use Node.js 20.x
        uses: actions/setup-node@v3
        with:
          node-version: 20.x

      - name: Update packages
        run: |
          npm update

      - name: Check if there are changes
        id: changes
        run: echo "changed=$(git status --porcelain | wc -l | xargs)" >> "$GITHUB_OUTPUT"
        shell: bash

      - name: Create a PR with the updates
        if: steps.changes.outputs.changed > 0
        id: create-pr
        uses: peter-evans/create-pull-request@v5
        with:
          commit-message: Update NPM packages
          branch: automated/update-packages
          branch-suffix: timestamp
          delete-branch: true
          title: Update NPM packages
          body: NPM lockfile updated
          base: main