Clone POM model before modifying it

Author: aloubyansky

devtools/maven/src/main/java/io/quarkus/maven/QuarkusBootstrapProvider.java

@@ -104,6 +104,34 @@ static Map<Path, Model> getProjectMap(MavenSession session) {
         return projectModels;
     }
 
+    /**
+     * This method is meant to return the "raw" model, i.e. the one that would be obtained
+     * by reading a {@code pom.xml} file, w/o interpolation, flattening, etc.
+     * However, plugins, such as, {@code flatten-maven-plugin}, may manipulate raw POMs
+     * early enough by stripping dependency management, test scoped dependencies, etc,
+     * to break our bootstrap. So this method attempts to make sure the essential configuration
+     * is still available to bootstrap a Quarkus app.
+     *
+     * @param mp Maven project
+     * @return raw POM
+     */
+    private static Model getRawModel(MavenProject mp) {
+        Model model = mp.getOriginalModel();
+        if (model.getDependencyManagement() == null) {
+            // clone the model to not modify the original model associated with the project,
+            // otherwise, the enforcer plugin may fail, for example
+            model = model.clone();
+            // this could be the flatten plugin removing the dependencyManagement
+            // in which case we set the effective dependency management to not lose the platform info
+            model.setDependencyManagement(mp.getDependencyManagement());
+            // it also helps to set the effective dependencies in this case
+            // since the flatten plugin may remove the test dependencies from the POM
+            model.setDependencies(mp.getDependencies());
+        }
+        model.setPomFile(mp.getFile());
+        return model;
+    }
+
     private static String getBootstrapProviderId(ArtifactKey moduleKey, String bootstrapId) {
         return bootstrapId == null ? moduleKey.toGacString() : moduleKey.toGacString() + "-" + bootstrapId;
     }