name: Package lock lint

# **What it does**: Makes sure package.json and package-lock.json is in sync
# **Why we have it**: Accidental manual edits of the dependencies directly in package.json
# **Who does it impact**: Docs engineering/writers/contributors.

on:
  pull_request:
    paths:
      - package.json
      - package-lock.json
      - .github/workflows/package-lock-lint.yml

permissions:
  contents: read

# This allows a subsequently queued workflow run to interrupt previous runs
concurrency:
  group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}'
  cancel-in-progress: true

jobs:
  lint:
    runs-on: ubuntu-latest
    if: github.repository == 'github/docs-internal' || github.repository == 'github/docs'
    steps:
      - name: Check out repo
        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab

      - name: Setup Node.js
        uses: actions/setup-node@8c91899e586c5b171469028077307d293428b516
        with:
          node-version-file: 'package.json'
          cache: npm

      - name: Run check
        run: |
          npm --version

          # From https://docs.npmjs.com/cli/v7/commands/npm-install
          #
          #   The --package-lock-only argument will only update the
          #   package-lock.json, instead of checking node_modules and
          #   downloading dependencies.
          #
          npm install --package-lock-only --ignore-scripts --include=optional

          # If the package.json (dependencies and devDependencies) is
          # in correct sync with package-lock.json running the above command
          # should *not* make an edit to the package-lock.json. I.e.
          # running `git status` should
          # say "nothing to commit, working tree clean".
          git diff --exit-code