Add website build check to CI workflow

ENHANCEMENT: Add website build verification to PR builds to catch template syntax errors before they get merged.

CHANGES:
- Added path filter to detect website changes in PRs
- Added JDK 21 setup for website builds (conditional on website changes)
- Added website build step that runs the same command as the deploy workflow
- Only runs when website/** files are modified to avoid unnecessary builds

BENEFITS:
- Prevents Qute template syntax errors from breaking the main branch
- Catches website build issues early in the development process
- Uses the same build command as production deployment for consistency
- Optimized to only run when website files actually change

This will help prevent issues like the recent Qute template syntax errors that broke the website build after being merged to main.

Author: gnodet

.github/workflows/ci.yml

@@ -53,6 +53,38 @@ jobs:
           # Test that wrapper works with current version
           ./mvx version
 
+      - name: Check for website changes
+        uses: dorny/paths-filter@v3
+        id: website-changes
+        with:
+          filters: |
+            website:
+              - 'website/**'
+
+      - name: Set up JDK 21 for website
+        if: steps.website-changes.outputs.website == 'true'
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+          cache: maven
+
+      - name: Check website build
+        if: steps.website-changes.outputs.website == 'true'
+        run: |
+          OWNER=$(echo "$GITHUB_REPOSITORY" | cut -d '/' -f 1)
+          REPO=$(echo "$GITHUB_REPOSITORY" | cut -d '/' -f 2)
+          SITE_URL="https://${OWNER}.github.io"
+          SITE_PATH="/${REPO}/"
+          echo "SITE_URL=$SITE_URL" >> $GITHUB_ENV
+          echo "SITE_PATH=$SITE_PATH" >> $GITHUB_ENV
+          echo "GITHUB_REPOSITORY=$GITHUB_REPOSITORY SITE_DIR=$SITE_DIR SITE_URL=$SITE_URL SITE_PATH=$SITE_PATH"
+          # Build website to catch template syntax errors
+          cd website
+          QUARKUS_ROQ_GENERATOR_BATCH=true mvn clean package quarkus:run -DskipTests --no-transfer-progress \
+              -Dquarkus.http.root-path=$SITE_PATH \
+              -Dsite.url=$SITE_URL
+
       - name: Upload build artifacts
         uses: actions/upload-artifact@v4
         with:

website/content/shell-command.md

@@ -87,7 +87,7 @@ mvx shell 'cp file1.txt file2.txt'
 
 1. **Environment Setup**: Automatically sets up PATH and environment variables for all configured tools
 2. **Cross-platform**: Uses mvx-shell interpreter for consistent behavior across platforms
-3. **Variable Expansion**: Supports `$VAR` and `${VAR}` syntax for environment variables
+3. **Variable Expansion**: Supports `$VAR` and `$\{VAR\}` syntax for environment variables
 4. **Built-in Commands**: Includes cross-platform implementations of common commands (cd, echo, mkdir, rm, cp)
 5. **Tool Integration**: All mvx-managed tools are available in the PATH