core: interrupt in Cli exits with 1

lib/vagrant/cli.rb

@@ -37,7 +37,14 @@ module Vagrant
       @logger.debug("Invoking command class: #{command_class} #{@sub_args.inspect}")
 
       # Initialize and execute the command class, returning the exit status.
-      result = command_class.new(@sub_args, @env).execute
+      result = 0
+      begin
+        result = command_class.new(@sub_args, @env).execute
+      rescue Interrupt
+        @env.ui.info(I18n.t("vagrant.cli_interrupt"))
+        result = 1
+      end
+
       result = 0 if !result.is_a?(Fixnum)
       return result
     end

templates/locales/en.yml

@@ -37,6 +37,8 @@ en:
       to automatically delete Chef nodes and clients.
     chef_run_list_empty: |-
       Warning: Chef run list is empty. This may not be what you want.
+    cli_interrupt: |-
+      Exiting due to interrupt.
     docker_auto_start_not_available: |-
       Unable to configure automatic restart of Docker containers on
       the guest machine

test/unit/support/shared/plugin_command_context.rb

@@ -1,8 +1,9 @@
 shared_context "command plugin helpers" do
-  def command_lambda(name, result)
+  def command_lambda(name, result, **opts)
     lambda do
       Class.new(Vagrant.plugin("2", "command")) do
         define_method(:execute) do
+          raise opts[:exception] if opts[:exception]
           result
         end
       end

test/unit/vagrant/cli_test.rb

@@ -28,6 +28,13 @@ describe Vagrant::CLI do
       subject.should_not_receive(:help)
       expect(subject.execute).to eql(42)
     end
+
+    it "returns exit code 1 if interrupted" do
+      commands[:destroy] = [command_lambda("destroy", 42, exception: Interrupt), {}]
+
+      subject = described_class.new(["destroy"], env)
+      expect(subject.execute).to eql(1)
+    end
   end
 
   describe "#help" do