Fuse workflows into single CI/CD pipeline

Author: aarvee11

.github/workflows/jekyll.yml

@@ -3,14 +3,18 @@
 # separate terms of service, privacy policy, and support
 # documentation.
 
-# Sample workflow for building and deploying a Jekyll site to GitHub Pages
-name: Deploy Jekyll site to Pages
+# Combined workflow for testing and deploying a Jekyll site to GitHub Pages
+name: CI/CD for Jekyll site
 
 on:
   # Runs on pushes targeting the default branch
   push:
     branches: ["main"]
 
+  # Runs on pull requests targeting the default branch
+  pull_request:
+    branches: ["main"]
+
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
@@ -27,33 +31,66 @@ concurrency:
   cancel-in-progress: false
 
 jobs:
+  # Test job
+  test:
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@4a9ddd6f338a97768b8006bf671dfbad383215f4
+        with:
+          ruby-version: '3.3'
+          bundler-cache: true
+          cache-version: 0
+      - name: Install dependencies
+        run: bundle install
+      - name: Check for syntax errors
+        run: bundle exec jekyll doctor
+      - name: Build Jekyll site
+        run: bundle exec jekyll build --strict_front_matter
+        env:
+          JEKYLL_ENV: development
+      - name: Test HTML
+        run: |
+          gem install html-proofer
+          htmlproofer ./_site --disable-external --check-html --check-img-http --check-opengraph
+      - name: Test CSS
+        run: |
+          npm install -g csslint
+          find ./_site -name "*.css" -exec csslint {} \;
+      - name: Check links
+        run: |
+          gem install html-proofer
+          htmlproofer ./_site --external_only --check-external-hash
+
   # Build job
   build:
+    if: github.event_name == 'push'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Ruby
-        # https://github.com/ruby/setup-ruby/releases/tag/v1.207.0
         uses: ruby/setup-ruby@4a9ddd6f338a97768b8006bf671dfbad383215f4
         with:
-          ruby-version: '3.3' # Not needed with a .ruby-version file
-          bundler-cache: true # runs 'bundle install' and caches installed gems automatically
-          cache-version: 0 # Increment this number if you need to re-download cached gems
+          ruby-version: '3.3'
+          bundler-cache: true
+          cache-version: 0
       - name: Setup Pages
         id: pages
         uses: actions/configure-pages@v5
       - name: Build with Jekyll
-        # Outputs to the './_site' directory by default
         run: bundle exec jekyll build --baseurl "${{ steps.pages.outputs.base_path }}"
         env:
           JEKYLL_ENV: production
       - name: Upload artifact
-        # Automatically uploads an artifact from the './_site' directory by default
         uses: actions/upload-pages-artifact@v4
 
   # Deployment job
   deploy:
+    if: github.event_name == 'push'
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}