ci: modify module extraction

- Replace xmllint call with script step to extract modules using Node script

Author: Genyus

.github/workflows/classroom-autograding.yml

@@ -38,14 +38,34 @@ jobs:
           java-version: '21'
           cache: maven
 
+      - uses: actions/setup-node@v3
+        with:
+          node-version: '20'
+      - run: npm install xml2js
+
+      - name: Extract modules from pom.xml
+        id: extract-modules
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const fs = require('fs');
+            const xml2js = require('xml2js');
+
+            const pomXml = fs.readFileSync('${{ env.STUDENT_REPO_PATH }}/pom.xml', 'utf8');
+            const parser = new xml2js.Parser();
+            const result = await parser.parseStringPromise(pomXml);
+            const modules = result.project.modules[0].module || [];
+            
+            core.setOutput('modules', modules.join(' '));
+
+            return modules.join(' ');
+
       - name: Run tests
         id: test
         run: |
           cd ${{ env.STUDENT_REPO_PATH }}
           chmod +x mvnw
-          # Extract module names from pom.xml
-          MODULES=$(xmllint --xpath "//modules/module/text()" pom.xml)
-          for dir in $MODULES; do
+          for dir in ${{ steps.extract-modules.outputs.modules }}; do
             if [ -d "$dir" ]; then
               echo "Running tests for $dir..."
               ./mvnw test -B --projects $dir || true