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# tinfoil: a simple wrapper around cooker for bitbake-based command-line utilities
#
# Copyright (C) 2012 Intel Corporation
# Copyright (C) 2011 Mentor Graphics Corporation
#
# 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.

import logging
import warnings
import os
import sys

import bb.cache
import bb.cooker
import bb.providers
import bb.utils
from bb.cooker import state
import bb.fetch2

class Tinfoil:
    def __init__(self):
        # Needed to avoid deprecation warnings with python 2.6
        warnings.filterwarnings("ignore", category=DeprecationWarning)

        # Set up logging
        self.logger = logging.getLogger('BitBake')
        console = logging.StreamHandler(sys.stdout)
        format = bb.msg.BBLogFormatter("%(levelname)s: %(message)s")
        console.setFormatter(format)
        self.logger.addHandler(console)

        initialenv = os.environ.copy()
        bb.utils.clean_environment()
        self.config = TinfoilConfig(parse_only=True)
        self.cooker = bb.cooker.BBCooker(self.config,
                                            self.register_idle_function)
        self.config_data = self.cooker.configuration.data
        bb.providers.logger.setLevel(logging.ERROR)
        self.cooker_data = None

    def register_idle_function(self, function, data):
        pass

    def parseRecipes(self):
        sys.stderr.write("Parsing recipes..")
        self.logger.setLevel(logging.WARNING)

        try:
            while self.cooker.state in (state.initial, state.parsing):
                self.cooker.updateCache()
        except KeyboardInterrupt:
            self.cooker.shutdown()
            self.cooker.updateCache()
            sys.exit(2)

        self.logger.setLevel(logging.INFO)
        sys.stderr.write("done.\n")

        self.cooker_data = self.cooker.status

    def prepare(self, config_only = False):
        if not self.cooker_data:
            if config_only:
                self.cooker.parseConfiguration()
                self.cooker_data = self.cooker.status
            else:
                self.parseRecipes()


class TinfoilConfig(object):
    def __init__(self, **options):
        self.pkgs_to_build = []
        self.debug_domains = []
        self.extra_assume_provided = []
        self.file = []
        self.debug = 0
        self.__dict__.update(options)

    def __getattr__(self, attribute):
        try:
            return super(TinfoilConfig, self).__getattribute__(attribute)
        except AttributeError:
            return None