let run if no apk is specified and feature file has only web

Author: ravelinx22

bin/kraken-mobile

@@ -36,7 +36,8 @@ end
 #-------------------------------
 
 def user_entered_apk_path
-  ensure_apk_is_specified
+  return nil if ARGV.first.nil?
+
   File.expand_path(ARGV.first)
 end
 
@@ -62,6 +63,7 @@ else
   when 'resign'
     require 'calabash-android/helpers'
     puts 'Resigning APK with Calabash-Android'
+    ensure_apk_is_specified
     resign_apk(user_entered_apk_path)
   when 'run'
     require File.join(File.dirname(__FILE__), 'kraken_mobile_calabash_android')

lib/kraken_mobile.rb

@@ -29,6 +29,8 @@ def start
   # Helpers
   #-------------------------------
   def apk_path_for_process_id(_process_id)
+    raise 'ERROR: Invalid APK file path' if @apk_path.nil?
+
     @apk_path
   end