.github/workflows/ci.yml

# Continuous Integration workflow to:
#   1. Build, lint, and test project
#   2. Commit any updates to "dist" folder

on:
  push:
    branches:
    - main
  pull_request:

name: Continuous Integration

jobs:
  build:
    runs-on: ubuntu-latest
    
    steps:
    - uses: actions/checkout@v2

    - uses: actions/setup-node@v2
      with:
        node-version: '12'
    
    - run: npm install

    - run: npm run build
        
    - run: npm run lint

    - run: npm run test
    
    - name: Examine changes
      run: |-
        echo 'FILES_CHANGED<<EOF' >> $GITHUB_ENV
        git diff --exit-code dist/index.js >> $GITHUB_ENV
        echo 'EOF' >> $GITHUB_ENV

    - name: Update dist
      if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' && env.FILES_CHANGED }}
      uses: swinton/commit@v2.x
      env:
        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      with:
        files:
          dist/index.js
        commit-message: Update dist