SONAR-9586 Run incremental task when sonar.incremental=true

2 files changed, 23 insertions, 2 deletions

diff --git a/sonar-scanner-engine/src/main/java/org/sonar/scanner/task/TaskContainer.java b/sonar-scanner-engine/src/main/java/org/sonar/scanner/task/TaskContainer.java
index 477bd4d2d83..32d3b81b141 100644
--- a/sonar-scanner-engine/src/main/java/org/sonar/scanner/task/TaskContainer.java
+++ b/sonar-scanner-engine/src/main/java/org/sonar/scanner/task/TaskContainer.java
@@ -70,14 +70,21 @@ public class TaskContainer extends ComponentContainer {
 
   @Override
   public void doAfterStart() {
-    // default value is declared in CorePlugin
     String taskKey = StringUtils.defaultIfEmpty(taskProperties.get(CoreProperties.TASK), CoreProperties.SCAN_TASK);
+    boolean incremental = "true".equals(taskProperties.get("sonar.incremental"));
+    if (CoreProperties.SCAN_TASK.equals(taskKey) && incremental) {
+      taskKey = "incremental";
+    }
     // Release memory
     taskProperties.clear();
 
     TaskDefinition def = getComponentByType(Tasks.class).definition(taskKey);
     if (def == null) {
-      throw MessageException.of("Task '" + taskKey + "' does not exist. Please use '" + ListTask.KEY + "' task to see all available tasks.");
+      if (incremental) {
+        throw MessageException.of("Incremental mode is not available. Please contact your administrator.");
+      } else {
+        throw MessageException.of("Task '" + taskKey + "' does not exist. Please use '" + ListTask.KEY + "' task to see all available tasks.");
+      }
     }
     Task task = getComponentByType(def.taskClass());
     if (task != null) {
diff --git a/sonar-scanner-engine/src/test/java/org/sonar/scanner/mediumtest/tasks/TasksMediumTest.java b/sonar-scanner-engine/src/test/java/org/sonar/scanner/mediumtest/tasks/TasksMediumTest.java
index 2739b76e23e..ea3ffc3737d 100644
--- a/sonar-scanner-engine/src/test/java/org/sonar/scanner/mediumtest/tasks/TasksMediumTest.java
+++ b/sonar-scanner-engine/src/test/java/org/sonar/scanner/mediumtest/tasks/TasksMediumTest.java
@@ -94,6 +94,20 @@ public class TasksMediumTest {
       .execute();
   }
 
+  @Test
+  public void incrementalNotFound() throws Exception {
+    tester.start();
+
+    thrown.expect(MessageException.class);
+    thrown.expectMessage(
+      "Incremental mode is not available. Please contact your administrator.");
+
+    tester.newTask()
+      .properties(ImmutableMap.<String, String>builder()
+        .put("sonar.incremental", "true").build())
+      .start();
+  }
+
   private static class FakeTaskPlugin extends SonarPlugin {
 
     @Override