linters.yml

# GitHub workflow file
name: Javascript linter

on:
  push:
    # change(s) on those files trigger this pipeline
    paths: ['*.js']

jobs:
  linters:   # run linters in separate job to not delay critical stuff
    timeout-minutes: 10
    runs-on: ubuntu-20.04

    steps:
      - name: Copy the repository
        uses: actions/checkout@v2
      
      # Node 12 included in LTS ubuntu-20.04 matches the version used for AWS Lambda
      # (https://github.com/actions/virtual-environments/blob/master/images/linux/Ubuntu2004-README.md)
      # hence comment the upgrade code for now 
      # - name: Check Node 12
      #   uses: actions/setup-node@v1.4.2
      #   with:
      #     node-version: 12

      - name: Cache node modules  
        uses: actions/cache@v2
        env:
          cache-name: cache-node-modules
        with:
          path: ~/.npm # npm cache files are stored in `~/.npm` on Linux/macOS
          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
          restore-keys: |
            ${{ runner.os }}-build-${{ env.cache-name }}-
            ${{ runner.os }}-build-
            ${{ runner.os }}-

      # Install nodejs packages listed in package-lock.json.
      # - if: github.base_ref == 'master'
      - name: Install node modules
        run: npm ci --no-fund
  
      - name: Run linters
        uses: samuelmeuli/lint-action@v1
        with:
          github_token: ${{ secrets.github_token }}
          # Enable linters
          eslint: true
          prettier: false