main.yml

name: Build and deploy

on:
  push:
    branches: [ master ]

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    steps:
    - name: 'Checkout the latest code'
      uses: actions/checkout@v3.3.0
      
    - name: 'Inject slug/short variables'
      uses: rlespinasse/github-slug-action@v4.4.0
        
    - name: 'Update site with run number'
      run: |
        sed -i "s/#BUILD_ID#/${{ env.GITHUB_REF_SLUG_URL }}-${{ github.run_id }}/g" _includes/nav.html
        
    - name: 'Update site with SHA'
      run: |
        sed -i "s/#COMMIT_ID#/${{ env.GITHUB_SHA_SHORT }}/g" _includes/nav.html
        
    # Use GitHub Actions' cache to shorten build times and decrease load on servers
    - name: 'Cache gems'
      uses: actions/cache@v3.2.3
      with:
        path: vendor/bundle
        key: ${{ runner.os }}-gems-${{ hashFiles('**/Gemfile') }}
        restore-keys: |
          ${{ runner.os }}-gems-
          
    - name: 'Build and publish Jekyll to GitHub Pages'
      uses: helaili/jekyll-action@v2.4
      with: 
       token: ${{ secrets.GITHUB_TOKEN }}