ci.yml

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  test:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2
        with:
          submodules: true

      - name: Setup Node.js environment
        uses: actions/setup-node@v1

      - name: Cache node_modules
        id: internal-cache-node_modules
        uses: actions/cache@v2
        with:
          path: node_modules
          key: internal-node_modules-ubuntu-latest.x-${{ hashFiles('package-lock.json') }}

      - name: Cache ~/.elm
        uses: actions/cache@v2
        with:
          path: ~/.elm
          key: elm-${{ hashFiles('elm.json', 'elm-tooling.json', 'review/elm.json') }}

      - name: Install npm dependencies
        if: steps.cache-node_modules.outputs.cache-hit != 'true'
        env:
          # If you have a `"postinstall": "elm-tooling install"` script in your
          # package.json, this turns it into a no-op. We’ll run it in the next
          # step because of the caching. If elm-tooling.json changes but
          # package-lock.json does not, the postinstall script needs running
          # but this step won’t.
          NO_ELM_TOOLING_INSTALL: 1
        run: npm ci

      # Install tools from elm-tooling.json, unless we restored them from
      # cache. package-lock.json and elm-tooling.json can change independently,
      # so we need to install separately based on what was restored from cache.
      # This is run even if we restored ~/.elm from cache to be 100% sure
      # node_modules/.bin/ contains links to all your tools. `elm-tooling
      # install` runs very fast when there’s nothing new to download so
      # skipping the step doesn’t save much time.
      - name: elm-tooling install
        run: npx --no-install elm-tooling install

      - name: Run tests
        run: npm test