New exec command to execute elixir code locally in command context.

deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/eval_command.ex

@@ -44,8 +44,6 @@ defmodule RabbitMQ.CLI.Ctl.Commands.EvalCommand do
     end
   end
 
-  def validate([_,_], _), do: :ok
-
   def run([expr],  %{node: node_name}) do
     {:ok, parsed} = parse_expr(expr)
     case :rabbit_misc.rpc_call(node_name, :erl_eval, :exprs, [parsed, []]) do

deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/exec_command.ex

@@ -0,0 +1,52 @@
+## The contents of this file are subject to the Mozilla Public License
+## Version 1.1 (the "License"); you may not use this file except in
+## compliance with the License. You may obtain a copy of the License
+## at http://www.mozilla.org/MPL/
+##
+## Software distributed under the License is distributed on an "AS IS"
+## basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+## the License for the specific language governing rights and
+## limitations under the License.
+##
+## The Original Code is RabbitMQ.
+##
+## The Initial Developer of the Original Code is GoPivotal, Inc.
+## Copyright (c) 2007-2016 Pivotal Software, Inc.  All rights reserved.
+
+
+defmodule RabbitMQ.CLI.Ctl.Commands.ExecCommand do
+  @behaviour RabbitMQ.CLI.CommandBehaviour
+  use RabbitMQ.CLI.DefaultOutput
+
+  def merge_defaults(args, opts), do: {args, opts}
+
+  def switches(), do: []
+  def aliases(), do: []
+
+  def formatter(), do: RabbitMQ.CLI.Formatters.Inspect
+
+  def validate([], _) do
+    {:validation_failure, :not_enough_args}
+  end
+
+  def validate(args, _) when length(args) > 1 do
+    {:validation_failure, :too_many_args}
+  end
+
+  def validate([""], _) do
+    {:validation_failure, "Expression must not be blank"}
+  end
+
+  def validate([_], _), do: :ok
+
+  def run([expr], %{} = opts) do
+    {val, _} = Code.eval_string(expr, [options: opts])
+    {:ok, val}
+  end
+
+  def usage, do: "exec <expr>"
+
+  def banner(_, _), do: nil
+
+  def flags(), do: []
+end