CSV data generator for lazy people like me.

big_bang

#!/usr/bin/ruby

# Tested on ruby 1.9.3p392 (2013-02-22 revision 39386) [x86_64-darwin11.4.2]
# Usage:
# $ bundle install
#
# $ bundle exec ./big_bang  # see available actions
# $ TOTAL=100 bundle exec ./big_bang users > users.csv  # generate a csv with 100 users

require 'uuid'
require 'faker'

actions = {
  "users" => Proc.new do |args|
    counter = ENV["TOTAL"].to_i
    counter = 5 if counter <= 0
    counter.times do |index|
      login = "#{UUID.generate}-#{index}"
      name = "#{Faker::Name.first_name} #{Faker::Name.last_name}"

      puts "#{login}@acme.com,#{name},#{login}"
    end
  end,
  "magic" => Proc.new do |args|
    puts "magic"
  end
}

## Main ##
action = ARGV[0].to_s
if actions.include?(action)
  actions[action].call(ARGV.clone)
else
  puts "Invalid action. Available actions are:\n"
  actions.keys.each { |action| puts action }
end

Gemfile

source "https://rubygems.org"

gem "faker", "~> 1.1.2"
gem "uuid", "~> 2.3.7"

Gemfile.lock

GEM
  remote: https://rubygems.org/
  specs:
    faker (1.1.2)
      i18n (~> 0.5)
    i18n (0.6.4)
    macaddr (1.6.1)
      systemu (~> 2.5.0)
    systemu (2.5.2)
    uuid (2.3.7)
      macaddr (~> 1.0)

PLATFORMS
  ruby

DEPENDENCIES
  faker (~> 1.1.2)
  uuid (~> 2.3.7)

users_example.csv