name: build
on: push
jobs:
  main:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v1
        with: { node-version: 14 }
      - id: yarn_cache
        run: echo "::set-output name=dir::$(yarn cache dir)"
      - uses: actions/cache@v1
        with:
          path: ${{ steps.yarn_cache.outputs.dir }}
          key: yarn-${{ hashFiles('**/yarn.lock') }}
          restore-keys: yarn-
      - run: yarn
      - run: yarn build
      - name: The working tree is clean.
        run: "[[ -z $(git status --porcelain) ]]"
      - name: Show the working tree status.
        if: failure()
        run: |
          git status
          git diff