Gradle idea plugin does not properly mark resources directories

build.gradle

@@ -179,6 +179,30 @@ gradle.projectsEvaluated {
 // intellij configuration
 allprojects {
   apply plugin: 'idea'
+
+  idea {
+    module {
+      // same as for the IntelliJ Gradle tooling integration
+      inheritOutputDirs = false
+      outputDir = file('build/classes/main')
+      testOutputDir = file('build/classes/test')
+
+      iml {
+        // fix so that Gradle idea plugin properly generates support for resource folders
+        // see also https://issues.gradle.org/browse/GRADLE-2975
+        withXml {
+          it.asNode().component.content.sourceFolder.findAll { it.@url == 'file://$MODULE_DIR$/src/main/resources' }.each {
+            it.attributes().remove('isTestSource')
+            it.attributes().put('type', 'java-resource')
+          }
+          it.asNode().component.content.sourceFolder.findAll { it.@url == 'file://$MODULE_DIR$/src/test/resources' }.each {
+            it.attributes().remove('isTestSource')
+            it.attributes().put('type', 'java-test-resource')
+          }
+        }
+      }
+    }
+  }
 }
 
 idea {