bin/sidekiqctl in sidekiq-2.17.8 vs bin/sidekiqctl in sidekiq-3.0.0

@@ -1,13 +1,23 @@
 #!/usr/bin/env ruby
 
 require 'fileutils'
 
 class Sidekiqctl
+  DEFAULT_TIMEOUT = 10
 
   attr_reader :stage, :pidfile, :timeout
 
+  def self.print_usage
+    puts
+    puts "Usage: #{File.basename($0)} <command> <pidfile> <timeout>"
+    puts " where <command> is either 'quiet', 'stop' or 'shutdown'"
+    puts "       <pidfile> is path to a pidfile"
+    puts "       <timeout> is number of seconds to wait till Sidekiq exits (default: #{Sidekiqctl::DEFAULT_TIMEOUT})"
+    puts
+  end
+
   def initialize(stage, pidfile, timeout)
     @stage = stage
     @pidfile = pidfile
     @timeout = timeout
 
@@ -65,14 +75,17 @@
 
   def shutdown
     quiet
     stop
   end
-
 end
 
-stage = ARGV[0]
-pidfile = ARGV[1]
-timeout = ARGV[2].to_i
-timeout = 10 if timeout == 0
+if ARGV.length < 2
+  Sidekiqctl.print_usage
+else
+  stage = ARGV[0]
+  pidfile = ARGV[1]
+  timeout = ARGV[2].to_i
+  timeout = Sidekiqctl::DEFAULT_TIMEOUT if timeout == 0
 
-Sidekiqctl.new(stage, pidfile, timeout)
+  Sidekiqctl.new(stage, pidfile, timeout)
+end