LDAP Addressbook for mutt commandline email client

lbook.rb

#!/usr/bin/env ruby

require "rubygems"
require "yaml"
require "net/ldap" or raise "Please install 'net-ldap'"

class LBook

  DEFAULT_ATTRIBUTES = ['mail', 'displayName', 'description']

  def initialize(args)
    @base_dn    = args['base_dn'] or raise ArgumentError.new("Need :base_dn")
    @attributes = args['attributes'] || DEFAULT_ATTRIBUTES

    @connection ||= Net::LDAP.new(
      host:       args['host'],
      port:       args['port'],
      encryption: args['encryption'],
      auth:       { method:   :simple,
                    username: args['username'] || username,
                    password: args['password'] || password }
    )   
  end 

  def find_by_mail(mail)
    find Net::LDAP::Filter.contains('mail', mail)
  end 

  def find(filter)
    @connection.search(base:@base_dn, filter:filter, attributes:@attributes)
  end 

end

unless ARGV.first
  puts 'Please specify a search string'
  exit 1
end

# # ~/.lbook.yml
# connection:
#   host:     'ldap_srv'
#   port:     389
#   username: 'ldap_usr'
#   password: 'ldap_pw'
#   base_dn:  'DC=whatever,DC=local'
config = YAML.load_file File.expand_path('~/.lbook.yml')
lbook  = LBook.new config['connection']

# Print for mutt
print "\n"
lbook.find_by_mail(ARGV.first).each do |e| 
  puts "#{ e.mail.first }\t#{ e.displayName.first }\t "
end