1 files changed, 50 insertions, 2 deletions
diff --git a/src/main/groovy/org/qtproject/qt/gradleplugin/QtGradlePlugin.groovy b/src/main/groovy/org/qtproject/qt/gradleplugin/QtGradlePlugin.groovy
index 0bdf0a5..d048aad 100644
--- a/src/main/groovy/org/qtproject/qt/gradleplugin/QtGradlePlugin.groovy
+++ b/src/main/groovy/org/qtproject/qt/gradleplugin/QtGradlePlugin.groovy
@@ -74,10 +74,58 @@ class QtGradlePlugin implements Plugin<Project> {
         }
     }
 
+    /*
+      Order of preference for finding properties:
+      1. project properties (enforced by gradle)
+        a. command line arguments
+        b. gradle.properties
+        c. environment variables
+      2. local.properties
+      3. build.gradle
+    */
     static def findProperty(String property, Project project) {
-        def propertyValue = project.findProperty(property)
+        return findProjectProperty(property, project)
+                ?: findLocalProperty(property, project)
+    }
+
+    static def findProjectProperty(String property, Project project) {
+        // camelCaseProperty (for command line arguments and env vars)
+        // Example: qtExtraCMakeArguments
+        def camelCaseSplits = property.split("\\.")
+        if (camelCaseSplits.length > 0) {
+            def camelCaseProp = camelCaseSplits[0]
+            for (def i = 1; i < camelCaseSplits.length; i++) {
+                def str = camelCaseSplits[i]
+                camelCaseProp += str.substring(0, 1).toUpperCase() + str.substring(1)
+            }
+            def camelCaseVal = project.findProperty(camelCaseProp)
+            if (camelCaseVal)
+                return camelCaseVal.toString()
+        }
+
+        // Normal property with dot (for gradle.properties file)
+        // Example: qt.extraCMakeArguments
+        def normalVal = project.findProperty(property)
+        if (normalVal)
+            return normalVal.toString()
+
+        return null
+    }
+
+    static def findLocalProperty(String property, Project project) {
+        Properties localProperties = new Properties()
+        def localValue = null
+
+        try {
+            localProperties.load(project.rootProject.file("local.properties").newDataInputStream())
+            localValue = localProperties.getProperty(property)
+        } catch (FileNotFoundException e) {
+            System.err.println(e.getMessage())
+        } catch (IOException e) {
+            System.err.println(e.getMessage())
+        }
 
-        return propertyValue ? propertyValue.toString() : ""
+        return localValue ? localValue.toString() : null
     }
 
     static File getBuildDirectory(project, qtProjectName) {