Rubygems

From Rory.wiki

General

Setup

Worth setting up a .gemrc file to store preferences for rubygems. Personally I never really use the docs that are locally generated as part of gem installs, and they can take an age to setup. Here's a sample .gemrc file which sets that and a couple of other common settings

If you need the local docs at a later date, you can always run rdoc then.

Use specific gem versions

If for some reason you need to use a specific gem version then installing and using can be done like this

installing

gem install <gem_name> -v '<version_number>'

Using

require 'rubygems'
gem 'gem_name','=<version_number>'
require '<gem_name>'

Specific Gem Notes

Nokogiri

From a default installation of ubuntu, you need a couple of additional libraries for it to work. This command should work

- sudo apt-get install libxslt-dev libxml2 libxml2-dev

ActiveLdap

Interesting library for querying LDAP directories and parsing LDIF files. A quick example of parsing an LDIF file for some basic information.

#!/usr/bin/env ruby
 
require 'rubygems'
require 'active_ldap'
 
 
input_file = File.open(ARGV[0],'r').read
output_file = File.new(ARGV[0] + 'parsed.txt','w+')
 
 
things = ActiveLdap::Ldif.parse(input_file)
 
 
things.records.each do |rec|
  output_file.puts '--------------'
  output_file.puts 'Distinguished name: ' + rec.dn
  output_file.puts 'Object Description: ' + rec.attributes['description'].join(',') if rec.attributes['description']
  output_file.puts 'Object Category: ' + rec.attributes['objectCategory'].join(',') if rec.attributes['objectCategory']
  output_file.puts 'Logon Count: ' + rec.attributes['logonCount'].join(',') if rec.attributes['logonCount']
  output_file.puts 'Incorrect Logon Count: ' + rec.attributes['badPwdCount'].join(',') if rec.attributes['badPwdCount']
end