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#!/usr/bin/env python
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (c) 2012, Intel Corporation.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# DESCRIPTION
# 'yocto-kernel' is the Yocto BSP Tool that helps users manage kernel
# config options and patches for a Yocto BSP.  Invoking it without any
# arguments will display help screens for the 'yocto-kernel' command
# and list the available 'yocto-kernel' subcommands.  Invoking a
# subcommand without any arguments will likewise display help screens
# for the specified subcommand.  Please use that interface for
# detailed help.
#
# AUTHORS
# Tom Zanussi <tom.zanussi (at] intel.com>
#

__version__ = "0.1.0"

import os
import sys
import optparse
import logging

scripts_path = os.path.abspath(os.path.dirname(os.path.abspath(sys.argv[0])))
lib_path = scripts_path + '/lib'
sys.path = sys.path + [lib_path]

from bsp.help import *
from bsp.kernel import *


def yocto_kernel_config_list_subcommand(args, usage_str):
    """
    Command-line handling for listing BSP config options.  The
    real work is done by bsp.kernel.yocto_kernel_config_list().
    """
    logging.debug("yocto_kernel_config_list_subcommand")

    parser = optparse.OptionParser(usage = usage_str)

    (options, args) = parser.parse_args(args)

    if len(args) != 1:
        logging.error("Wrong number of arguments, exiting\n")
        parser.print_help()
        sys.exit(1)

    yocto_kernel_config_list(scripts_path, args[0])


def yocto_kernel_config_add_subcommand(args, usage_str):
    """
    Command-line handling for adding BSP config items.  The real work
    is done by bsp.kernel.yocto_kernel_config_add().
    """
    logging.debug("yocto_kernel_config_add_subcommand")

    parser = optparse.OptionParser(usage = usage_str)

    (options, args) = parser.parse_args(args)

    if len(args) < 2:
        logging.error("Wrong number of arguments, exiting\n")
        parser.print_help()
        sys.exit(1)

    machine = args.pop(0)
    yocto_kernel_config_add(scripts_path, machine, args)


def yocto_kernel_config_rm_subcommand(args, usage_str):
    """
    Command-line handling for removing BSP config items.  The real
    work is done by bsp.kernel.yocto_kernel_config_rm().
    """
    logging.debug("yocto_kernel_config_rm_subcommand")

    parser = optparse.OptionParser(usage = usage_str)

    (options, args) = parser.parse_args(args)

    if len(args) != 1:
        logging.error("Wrong number of arguments, exiting\n")
        parser.print_help()
        sys.exit(1)

    yocto_kernel_config_rm(scripts_path, args[0])


def yocto_kernel_patch_list_subcommand(args, usage_str):
    """
    Command-line handling for listing BSP (SRC_URI patches.  The real
    work is done by bsp.kernel.yocto_kernel_patch_list().
    """
    logging.debug("yocto_kernel_patch_list_subcommand")

    parser = optparse.OptionParser(usage = usage_str)

    (options, args) = parser.parse_args(args)

    if len(args) != 1:
        logging.error("Wrong number of arguments, exiting\n")
        parser.print_help()
        sys.exit(1)

    yocto_kernel_patch_list(scripts_path, args[0])


def yocto_kernel_patch_add_subcommand(args, usage_str):
    """
    Command-line handling for adding BSP patches.  The real work is
    done by bsp.kernel.yocto_kernel_patch_add().
    """
    logging.debug("yocto_kernel_patch_add_subcommand")

    parser = optparse.OptionParser(usage = usage_str)

    (options, args) = parser.parse_args(args)

    if len(args) < 2:
        logging.error("Wrong number of arguments, exiting\n")
        parser.print_help()
        sys.exit(1)

    machine = args.pop(0)
    yocto_kernel_patch_add(scripts_path, machine, args)


def yocto_kernel_patch_rm_subcommand(args, usage_str):
    """
    Command-line handling for removing BSP patches.  The real work is
    done by bsp.kernel.yocto_kernel_patch_rm().
    """
    logging.debug("yocto_kernel_patch_rm_subcommand")

    parser = optparse.OptionParser(usage = usage_str)

    (options, args) = parser.parse_args(args)

    if len(args) != 1:
        logging.error("Wrong number of arguments, exiting\n")
        parser.print_help()
        sys.exit(1)

    yocto_kernel_patch_rm(scripts_path, args[0])


subcommands = {
    "config-list": [yocto_kernel_config_list_subcommand,
                    yocto_kernel_config_list_usage,
                    yocto_kernel_config_list_help],
    "config-add": [yocto_kernel_config_add_subcommand,
                   yocto_kernel_config_add_usage,
                   yocto_kernel_config_add_help],
    "config-rm": [yocto_kernel_config_rm_subcommand,
                  yocto_kernel_config_rm_usage,
                  yocto_kernel_config_rm_help],
    "patch-list": [yocto_kernel_patch_list_subcommand,
                   yocto_kernel_patch_list_usage,
                   yocto_kernel_patch_list_help],
    "patch-add": [yocto_kernel_patch_add_subcommand,
                  yocto_kernel_patch_add_usage,
                  yocto_kernel_patch_add_help],
    "patch-rm": [yocto_kernel_patch_rm_subcommand,
                 yocto_kernel_patch_rm_usage,
                 yocto_kernel_patch_rm_help],
}


def start_logging(loglevel):
    logging.basicConfig(filname = 'yocto-kernel.log', filemode = 'w', level=loglevel)


def main():
    parser = optparse.OptionParser(version = "yocto-kernel version %s" % __version__,
                                   usage = yocto_kernel_usage)

    parser.disable_interspersed_args()
    parser.add_option("-D", "--debug", dest = "debug", action = "store_true",
                      default = False, help = "output debug information")

    (options, args) = parser.parse_args()

    loglevel = logging.INFO
    if options.debug:
        loglevel = logging.DEBUG
    start_logging(loglevel)

    if len(args):
        if args[0] == "help":
            if len(args) == 1:
                parser.print_help()
                sys.exit(1)
            sc = 1
        else:
            sc = 0

        if args[sc] == "config" or args[sc] == "patch":
            if len(args) < 2 + sc:
                parser.print_help()
                sys.exit(1)
            args[sc] += "-" + args[sc + 1]
            args.pop(sc + 1)

    invoke_subcommand(args, parser, yocto_kernel_help_usage, subcommands)


if __name__ == "__main__":
    try:
        ret = main()
    except Exception:
        ret = 1
        import traceback
        traceback.print_exc(5)
    sys.exit(ret)