import os
import subprocess

from os.path import dirname, join as joinpath

import m5

def generate(config_file, cores=1, memories=1, memory_size=1024):
    default = joinpath(dirname(__file__), '../../src/mem/ruby/config')
    ruby_config = os.environ.get('RUBY_CONFIG', default)
    args = [ "ruby", "-I", ruby_config, joinpath(ruby_config, "print_cfg.rb"),
             "-r", joinpath(ruby_config, config_file), "-p", str(cores),
             "-m", str(memories), "-s", str(memory_size)]

    temp_config = joinpath(m5.options.outdir, "ruby.config")
    ret = subprocess.call(args, stdout=file(temp_config, "w"))
    if ret != 0:
        raise RuntimeError, "subprocess failed!"

    return m5.objects.RubyMemory(config_file=temp_config, num_cpus=cores)