#!/usr/bin/env ruby
# Usage: rip-leaves
#
# Prints a list of packages that no other packages depend on

require 'rip/script'
require 'yaml'

leaves = rip(:list, '-p').map { |package| package.split(' ').first }

leaves.dup.each do |package|
  info = YAML.load(`rip-info #{package}`)

  if info && info['needs']
    info['needs'].each do |need|
      name = need.split(' ').first
      leaves.delete(name)
    end
  end
end

puts leaves