SONARPLUGINS-2202 Prefix child key by parent key

src/main/java/org/sonar/runner/model/SonarProjectBuilder.java

     }
   }
 
-  private ProjectDefinition loadChildProjectFromProperties(ProjectDefinition rootProject, Properties childProps, String moduleId) {
+  private ProjectDefinition loadChildProjectFromProperties(ProjectDefinition parentProject, Properties childProps, String moduleId) {
     checkMandatoryProperties(moduleId, childProps, MANDATORY_PROPERTIES_FOR_CHILD);
-    mergeParentProperties(childProps, rootProject.getProperties());
+    mergeParentProperties(childProps, parentProject.getProperties());
 
     File baseDir = null;
     if (childProps.containsKey(PROPERTY_PROJECT_BASEDIR)) {
-      baseDir = getFileFromPath(childProps.getProperty(PROPERTY_PROJECT_BASEDIR), rootProject.getBaseDir());
+      baseDir = getFileFromPath(childProps.getProperty(PROPERTY_PROJECT_BASEDIR), parentProject.getBaseDir());
     } else {
-      baseDir = new File(rootProject.getBaseDir(), moduleId);
+      baseDir = new File(parentProject.getBaseDir(), moduleId);
     }
     setProjectBaseDirOnProperties(childProps, moduleId, baseDir);
+    prefixProjectKeyWithParentKey(childProps, parentProject.getKey());
 
     return defineProject(childProps);
   }
 
-  private ProjectDefinition loadChildProjectFromPropertyFile(ProjectDefinition rootProject, Properties moduleProps, String moduleId) {
-    File propertyFile = getFileFromPath(moduleProps.getProperty(PROPERTY_PROJECT_CONFIG_FILE), rootProject.getBaseDir());
+  private ProjectDefinition loadChildProjectFromPropertyFile(ProjectDefinition parentProject, Properties moduleProps, String moduleId) {
+    File propertyFile = getFileFromPath(moduleProps.getProperty(PROPERTY_PROJECT_CONFIG_FILE), parentProject.getBaseDir());
     if (!propertyFile.isFile()) {
       throw new RunnerException("The properties file of the module '" + moduleId + "' does not exist: " + propertyFile.getAbsolutePath());
     }
     }
 
     checkMandatoryProperties(moduleId, childProps, MANDATORY_PROPERTIES_FOR_CHILD);
-    mergeParentProperties(childProps, rootProject.getProperties());
+    mergeParentProperties(childProps, parentProject.getProperties());
 
     File baseDir = null;
     if (childProps.containsKey(PROPERTY_PROJECT_BASEDIR)) {
       baseDir = propertyFile.getParentFile();
     }
     setProjectBaseDirOnProperties(childProps, moduleId, baseDir);
+    prefixProjectKeyWithParentKey(childProps, parentProject.getKey());
 
     return defineProject(childProps);
   }
 
-  private void setProjectBaseDirOnProperties(Properties childProps, String moduleId, File baseDir) {
+  @VisibleForTesting
+  protected static void prefixProjectKeyWithParentKey(Properties childProps, String parentKey) {
+    String childKey = childProps.getProperty(PROPERTY_PROJECT_KEY);
+    childProps.put(PROPERTY_PROJECT_KEY, parentKey + ":" + childKey);
+  }
+
+  private static void setProjectBaseDirOnProperties(Properties childProps, String moduleId, File baseDir) {
     if (!baseDir.isDirectory()) {
       throw new RunnerException("The base directory of the module '" + moduleId + "' does not exist: " + baseDir.getAbsolutePath());
     }

src/test/java/org/sonar/runner/model/SonarProjectBuilderTest.java

 
     // Module 1
     ProjectDefinition module1 = modules.get(0);
-    assertThat(module1.getKey()).isEqualTo("com.foo.project.module1");
+    assertThat(module1.getKey()).isEqualTo("com.foo.project:com.foo.project.module1");
     assertThat(module1.getName()).isEqualTo("Foo Module 1");
     assertThat(module1.getVersion()).isEqualTo("1.0-SNAPSHOT");
     // Description should not be inherited from parent if not set
 
     // Module 2
     ProjectDefinition module2 = modules.get(1);
-    assertThat(module2.getKey()).isEqualTo("com.foo.project.module2");
+    assertThat(module2.getKey()).isEqualTo("com.foo.project:com.foo.project.module2");
     assertThat(module2.getName()).isEqualTo("Foo Module 2");
     assertThat(module2.getVersion()).isEqualTo("1.0-SNAPSHOT");
     assertThat(module2.getDescription()).isEqualTo("Description of Module 2");
     ProjectDefinition rootProject = loadProjectDefinition("multi-module-with-basedir");
     List<ProjectDefinition> modules = rootProject.getSubProjects();
     assertThat(modules.size()).isEqualTo(1);
-    assertThat(modules.get(0).getKey()).isEqualTo("com.foo.project.module1");
+    assertThat(modules.get(0).getKey()).isEqualTo("com.foo.project:com.foo.project.module1");
   }
 
   @Test
     List<ProjectDefinition> modules = rootProject.getSubProjects();
     assertThat(modules.size()).isEqualTo(1);
     ProjectDefinition module = modules.get(0);
-    assertThat(module.getKey()).isEqualTo("com.foo.project.module1");
+    assertThat(module.getKey()).isEqualTo("com.foo.project:com.foo.project.module1");
     // verify the base directory that has been changed in this config file
     assertThat(module.getBaseDir().getCanonicalFile()).isEqualTo(TestUtils.getResource(this.getClass(), "multi-module-with-configfile/any-folder"));
   }
     assertThat(workDir).isEqualTo(new File("src").getAbsoluteFile());
   }
 
+  @Test
+  public void shouldReturnPrefixedKey() {
+    Properties props = new Properties();
+    props.put("sonar.projectKey", "my-module-key");
+
+    SonarProjectBuilder.prefixProjectKeyWithParentKey(props, "my-parent-key");
+    assertThat(props.getProperty("sonar.projectKey")).isEqualTo("my-parent-key:my-module-key");
+  }
+
 }