check-yarn.yml

name: Check Yarn

# See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
on:
  create:
  push:
    paths:
      - ".github/workflows/check-yarn.ya?ml"
      - "**/.yarnrc"
      - "**/package.json"
      - "**/package-lock.json"
      - "**/yarn.lock"
  pull_request:
    paths:
      - ".github/workflows/check-yarn.ya?ml"
      - "**/.yarnrc"
      - "**/package.json"
      - "**/package-lock.json"
      - "**/yarn.lock"
  schedule:
    # Run every Tuesday at 8 AM UTC to catch breakage resulting from changes to the JSON schema.
    - cron: "0 8 * * TUE"
  workflow_dispatch:
  repository_dispatch:

jobs:
  run-determination:
    runs-on: ubuntu-latest
    permissions: {}
    outputs:
      result: ${{ steps.determination.outputs.result }}
    steps:
      - name: Determine if the rest of the workflow should run
        id: determination
        run: |
          RELEASE_BRANCH_REGEX="refs/heads/[0-9]+.[0-9]+.x"
          # The `create` event trigger doesn't support `branches` filters, so it's necessary to use Bash instead.
          if [[
            "${{ github.event_name }}" != "create" ||
            "${{ github.ref }}" =~ $RELEASE_BRANCH_REGEX
          ]]; then
            # Run the other jobs.
            RESULT="true"
          else
            # There is no need to run the other jobs.
            RESULT="false"
          fi

          echo "result=$RESULT" >> $GITHUB_OUTPUT

  check-sync:
    name: check-sync (${{ matrix.project.path }})
    needs: run-determination
    if: needs.run-determination.outputs.result == 'true'
    runs-on: ubuntu-latest
    permissions:
      contents: read

    strategy:
      fail-fast: false
      matrix:
        project:
          - path: .

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          cache: yarn
          node-version: ${{ env.NODE_VERSION }}

      - name: Install npm package dependencies
        env:
          # Avoid failure of @vscode/ripgrep installation due to GitHub API rate limiting:
          # https://github.com/microsoft/vscode-ripgrep#github-api-limit-note
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          yarn \
            install \
            --ignore-scripts

      - name: Check yarn.lock
        run: |
          git \
            diff \
              --color \
              --exit-code \
              "${{ matrix.project.path }}/yarn.lock"