1 files changed, 24 insertions, 1 deletions
diff --git a/sonar-runner-api/src/main/java/org/sonar/runner/api/Runner.java b/sonar-runner-api/src/main/java/org/sonar/runner/api/Runner.java
index b7583de..c4013f6 100644
--- a/sonar-runner-api/src/main/java/org/sonar/runner/api/Runner.java
+++ b/sonar-runner-api/src/main/java/org/sonar/runner/api/Runner.java
@@ -19,10 +19,14 @@
  */
 package org.sonar.runner.api;
 
+import org.apache.commons.io.IOUtils;
 import org.sonar.runner.impl.InternalProperties;
 
 import javax.annotation.Nullable;
 
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.OutputStream;
 import java.util.Properties;
 
 /**
@@ -87,7 +91,26 @@ public abstract class Runner<T extends Runner> {
     initDefaultValues();
     new SourceEncoding().init(this);
     new Dirs().init(this);
-    doExecute();
+    String dumpToFile = properties.getProperty(InternalProperties.RUNNER_DUMP_TO_FILE);
+    if (dumpToFile != null) {
+      File dumpFile = new File(dumpToFile);
+      writeProperties(dumpFile);
+      System.out.println("Simulation mode. Configuration written to " + dumpFile.getAbsolutePath());
+    } else {
+      doExecute();
+    }
+  }
+
+  private void writeProperties(File outputFile) {
+    OutputStream output = null;
+    try {
+      output = new FileOutputStream(outputFile);
+      properties().store(output, "Generated by sonar-runner");
+    } catch (Exception e) {
+      throw new IllegalStateException("Fail to export sonar-runner properties", e);
+    } finally {
+      IOUtils.closeQuietly(output);
+    }
   }
 
   protected abstract void doExecute();