add tools pull-deps to cli

services/src/main/java/io/druid/cli/Main.java

@@ -59,7 +59,7 @@ public class Main
     builder.withGroup("tools")
            .withDescription("Various tools for working with Druid")
            .withDefaultCommand(Help.class)
-           .withCommands(ConvertProperties.class, DruidJsonValidator.class);
+           .withCommands(ConvertProperties.class, DruidJsonValidator.class, PullDependencies.class);
 
     builder.withGroup("index")
                .withDescription("Run indexing for druid")

services/src/main/java/io/druid/cli/PullDependencies.java

@@ -0,0 +1,16 @@
+package io.druid.cli;
+
+import io.airlift.command.Command;
+
+
+@Command(
+    name = "pull-deps",
+    description = "Pull down dependencies to the local repository specified by druid.extensions.localRepository"
+)
+public class PullDependencies implements Runnable
+{
+  @Override
+  public void run() {
+    // dependencies are pulled down as a side-effect of Guice injection
+  }
+}