Add error handling when loading dependencies

Author: rastating

env.rb

@@ -1,10 +1,31 @@
-require 'colorize'
 require 'date'
+require 'fileutils'
 require 'json'
-require 'require_all'
 require 'time'
-require 'typhoeus'
-require 'zip'
+
+required_gems = [
+  'colorize',
+  'mime/types',
+  'nokogiri',
+  'require_all',
+  'slop',
+  'typhoeus',
+  'zip'
+]
+
+required_gems.each do |gem_name|
+  begin
+    require gem_name
+  rescue LoadError
+    puts
+    puts "Failed to load required dependency: #{gem_name}"
+    puts
+    puts 'You must run "bundle install" prior to using WordPress Exploit Framework.'
+    puts 'If bundler is not present on your system, you can install it by running "gem install bundler"'
+    puts
+    exit
+  end
+end
 
 wpxfbase = __FILE__
 

wpxf.rb

@@ -1,9 +1,7 @@
 #!/usr/bin/env ruby
 
-require 'fileutils'
 require_relative 'env'
 require 'cli/console'
-require 'slop'
 
 begin
   Slop.parse do |o|