proxy_fetcher in proxy_fetcher-0.6.1

- old
+ new

@@ -1,7 +1,16 @@
 #!/usr/bin/env ruby
 
+begin
+  require 'nokogiri'
+rescue LoadError
+  puts "Seems like you haven't installed 'nokogiri' gem that is used by ProxyFetcher for HTML parsing.\n" \
+       "Install it with the command: `gem install nokogiri` or check out it's documentation:\n" \
+       'http://www.nokogiri.org/tutorials/installing_nokogiri.html'
+  exit(1)
+end
+
 require 'optparse'
 require 'proxy_fetcher'
 
 options = {
   filters: {},
@@ -35,9 +44,14 @@
     options[:timeout] = value
   end
 
   opts.on('-j', '--json', '# Dump proxies to the JSON format') do
     options[:json] = true
+  end
+
+  opts.on('-v', '--version', '# Shows gem version') do
+    puts ProxyFetcher.gem_version.to_s
+    exit(0)
   end
 end.parse!
 
 ProxyFetcher.config.providers = options[:providers] if options[:providers]
 ProxyFetcher.config.timeout = options[:timeout] if options[:timeout]