Shuttle to bash alias

shuttle_alias.rb

require 'json'

if ARGV.length != 1
  puts 'usage: ruby shuttle_alias.rb path_to_shuttle_config.json'
  exit
end

config = JSON.parse File.read(ARGV[0])

puts '# Alias from Shuttle'

def perform(node, path = [])
  if node.is_a?(Hash)
    if node['name']
      path << node['name']
      alias_name = path.map(&:downcase).join('_')

      puts "alias ssh_#{alias_name}='#{node['cmd']}'"
    else
      node.each do |key, value|
        perform(value, path.dup + [key])
      end
    end
  else
    node.each do |value|
      perform(value, path.dup)
    end
  end
end

perform config['hosts']