Merge pull request #4902 from machi1990/fix/npe-platform-desc-json-pl…

…ugin

fix: add a NPE check for overridable description files

devtools/platform-descriptor-json-plugin/src/main/java/io/quarkus/maven/GenerateExtensionsJsonMojo.java

@@ -175,15 +175,17 @@ public void execute() throws MojoExecutionException, MojoFailureException {
         // And add the list of extensions
         platformJson.add("extensions", extListJson.build());
 
-        theRest.forEach((key, item) -> {
-            // Ignore the two keys we are explicitly managing
-            // but then add anything else found.
-            // TODO: make a real merge if needed eventually.
-            if (!"bom".equals(key) && !"extensions".equals(key)) {
-                platformJson.add(key, item);
+        if (theRest != null) {
+            theRest.forEach((key, item) -> {
+                // Ignore the two keys we are explicitly managing
+                // but then add anything else found.
+                // TODO: make a real merge if needed eventually.
+                if (!"bom".equals(key) && !"extensions".equals(key)) {
+                    platformJson.add(key, item);
 
-            }
-        });
+                }
+            });
+        }
 
         // Write the JSON to the output file
         final File outputDir = outputFile.getParentFile();