#! /usr/bin/env python2.6
# -*- mode: python; coding: utf-8; -*-
#
from optparse import OptionParser
import os, sys, shutil

PROJRELROOT = '../'

sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), PROJRELROOT)))

from scripts.cml.generate_container_cml import *

# Parse options + autogenerate cml rule file if necessary.
def build_parse_options():
    autogen_true = 0
    usage = "usage: %prog [options] arg"
    parser = OptionParser(usage)

    parser.add_option("-a", "--arch", type = "string", dest = "arch",
                      help = "Use configuration file for architecture")
    parser.add_option("-c", "--num-containers", type = "int", dest = "ncont",
                      help = "Maximum number of containers that will be "
                             "made available in configuration")
    parser.add_option("-f", "--use-file", dest = "cml_file",
                      help = "Supply user-defined cml file "
                             "(Use only if you want to override default)")
    parser.add_option("-r", "--reset-old-config", action = "store_true",
                      default = False, dest = "reset_old_config",
                      help = "Reset configuration file settings "
                             "(If you had configured before and changing the "
                             "rule file, this will reset existing values to default)")

    (options, args) = parser.parse_args()

    autogen_true = len(sys.argv) > 1 or not os.path.exists(CML2_CML_FILE)

    if autogen_true and not options.arch:
        print "No arch supplied (-a), using `arm' as default."
        options.arch = "arm"
    if autogen_true and not options.ncont:
        options.ncont = 4
        print "Max container count not supplied (-c), using %d as default." % options.ncont

    # Regenerate cml file if options are supplied or the file doesn't exist.
    if autogen_true:
        generate_container_cml(options.arch, options.ncont)
        if options.reset_old_config == 1 and os.path.exists(CML2_OLDCONFIG_FILE):
            print "Moving %s to unused file %s" % (CML2_OLDCONFIG_FILE, CML2_OLDCONFIG_FILE + '.saved')
            shutil.move(CML2_OLDCONFIG_FILE, CML2_OLDCONFIG_FILE + '.saved')