ssh-config => a ruby script for easily managing your ssh config shortcuts so that you don't need to type beasts like: ssh -i ~/.ssh/thisisapemkey.pem ubuntu@ec2-amazon-has-really-difficult-hostnames.amazonaws.com

ssh-config

#!/usr/bin/env ruby

require 'thor'

class SSHConfig < Thor
  desc "list", "list all hosts"
  def list()
    f = File.open("/Users/#{ENV['USER']}/.ssh/config", 'r')
    hosts = f.select { |line| line =~ /Host\s/ }
    hosts.map { |host| host[4..-1].strip }.each do |host|
      puts host
    end
  end

  desc "add [HOST] [HOSTNAME]", "add HOST shortcut for HOSTNAME to ssh config"
  method_options :user => :string, :identity_file => :string
  def add(host, host_name)
    f = File.open("/Users/#{ENV['USER']}/.ssh/config", 'a')
    f << "Host #{host}\n"
    f << "HostName #{host_name}\n"
    f << "User #{options[:user]}\n" if options[:user]
    f << "IdentityFile #{options[:identity_file]}\n" if options[:identity_file]
    f << "\n"
    f.close
  end
end

SSHConfig.start(ARGV)