parse_cap_config.rb

#!/usr/bin/env ruby

wanting = ARGV[0]
role    = wanting.scan(/[a-z]+/).first.to_sym
number  = wanting.scan(/\d+/).first.to_i

ROLES = {}
def role(role, *hosts)
  hosts.pop if hosts.last.is_a?(Hash)
  ROLES[role] = hosts
end

def method_missing(meth, *args, &block)
end

load "config/deploy/production.rb"

p ROLES[role][number-1]