diff --git a/bitbake/lib/bb/main.py b/bitbake/lib/bb/main.py
new file mode 100755
index 0000000..8762f72
--- /dev/null
+++ b/bitbake/lib/bb/main.py
@@ -0,0 +1,427 @@
+#!/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) 2003, 2004  Chris Larson
+# Copyright (C) 2003, 2004  Phil Blundell
+# Copyright (C) 2003 - 2005 Michael 'Mickey' Lauer
+# Copyright (C) 2005        Holger Hans Peter Freyther
+# Copyright (C) 2005        ROAD GmbH
+# Copyright (C) 2006        Richard Purdie
+#
+# 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 os
+import sys
+import logging
+import optparse
+import warnings
+
+import bb
+from bb import event
+import bb.msg
+from bb import cooker
+from bb import ui
+from bb import server
+from bb import cookerdata
+
+logger = logging.getLogger("BitBake")
+
+class BBMainException(Exception):
+    pass
+
+def present_options(optionlist):
+    if len(optionlist) > 1:
+        return ' or '.join([', '.join(optionlist[:-1]), optionlist[-1]])
+    else:
+        return optionlist[0]
+
+class BitbakeHelpFormatter(optparse.IndentedHelpFormatter):
+    def format_option(self, option):
+        # We need to do this here rather than in the text we supply to
+        # add_option() because we don't want to call list_extension_modules()
+        # on every execution (since it imports all of the modules)
+        # Note also that we modify option.help rather than the returned text
+        # - this is so that we don't have to re-format the text ourselves
+        if option.dest == 'ui':
+            valid_uis = list_extension_modules(bb.ui, 'main')
+            option.help = option.help.replace('@CHOICES@', present_options(valid_uis))
+        elif option.dest == 'servertype':
+            valid_server_types = list_extension_modules(bb.server, 'BitBakeServer')
+            option.help = option.help.replace('@CHOICES@', present_options(valid_server_types))
+
+        return optparse.IndentedHelpFormatter.format_option(self, option)
+
+def list_extension_modules(pkg, checkattr):
+    """
+    Lists extension modules in a specific Python package
+    (e.g. UIs, servers). NOTE: Calling this function will import all of the
+    submodules of the specified module in order to check for the specified
+    attribute; this can have unusual side-effects. As a result, this should
+    only be called when displaying help text or error messages.
+    Parameters:
+        pkg: previously imported Python package to list
+        checkattr: attribute to look for in module to determine if it's valid
+            as the type of extension you are looking for
+    """
+    import pkgutil
+    pkgdir = os.path.dirname(pkg.__file__)
+
+    modules = []
+    for _, modulename, _ in pkgutil.iter_modules([pkgdir]):
+        if os.path.isdir(os.path.join(pkgdir, modulename)):
+            # ignore directories
+            continue
+        try:
+            module = __import__(pkg.__name__, fromlist=[modulename])
+        except:
+            # If we can't import it, it's not valid
+            continue
+        module_if = getattr(module, modulename)
+        if getattr(module_if, 'hidden_extension', False):
+            continue
+        if not checkattr or hasattr(module_if, checkattr):
+            modules.append(modulename)
+    return modules
+
+def import_extension_module(pkg, modulename, checkattr):
+    try:
+        # Dynamically load the UI based on the ui name. Although we
+        # suggest a fixed set this allows you to have flexibility in which
+        # ones are available.
+        module = __import__(pkg.__name__, fromlist = [modulename])
+        return getattr(module, modulename)
+    except AttributeError:
+        raise BBMainException('FATAL: Unable to import extension module "%s" from %s. Valid extension modules: %s' % (modulename, pkg.__name__, present_options(list_extension_modules(pkg, checkattr))))
+
+
+# Display bitbake/OE warnings via the BitBake.Warnings logger, ignoring others"""
+warnlog = logging.getLogger("BitBake.Warnings")
+_warnings_showwarning = warnings.showwarning
+def _showwarning(message, category, filename, lineno, file=None, line=None):
+    if file is not None:
+        if _warnings_showwarning is not None:
+            _warnings_showwarning(message, category, filename, lineno, file, line)
+    else:
+        s = warnings.formatwarning(message, category, filename, lineno)
+        warnlog.warn(s)
+
+warnings.showwarning = _showwarning
+warnings.filterwarnings("ignore")
+warnings.filterwarnings("default", module="(<string>$|(oe|bb)\.)")
+warnings.filterwarnings("ignore", category=PendingDeprecationWarning)
+warnings.filterwarnings("ignore", category=ImportWarning)
+warnings.filterwarnings("ignore", category=DeprecationWarning, module="<string>$")
+warnings.filterwarnings("ignore", message="With-statements now directly support multiple context managers")
+
+class BitBakeConfigParameters(cookerdata.ConfigParameters):
+
+    def parseCommandLine(self, argv=sys.argv):
+        parser = optparse.OptionParser(
+            formatter = BitbakeHelpFormatter(),
+            version = "BitBake Build Tool Core version %s" % bb.__version__,
+            usage = """%prog [options] [recipename/target recipe:do_task ...]
+
+    Executes the specified task (default is 'build') for a given set of target recipes (.bb files).
+    It is assumed there is a conf/bblayers.conf available in cwd or in BBPATH which
+    will provide the layer, BBFILES and other configuration information.""")
+
+        parser.add_option("-b", "--buildfile", help = "Execute tasks from a specific .bb recipe directly. WARNING: Does not handle any dependencies from other recipes.",
+                   action = "store", dest = "buildfile", default = None)
+
+        parser.add_option("-k", "--continue", help = "Continue as much as possible after an error. While the target that failed and anything depending on it cannot be built, as much as possible will be built before stopping.",
+                   action = "store_false", dest = "abort", default = True)
+
+        parser.add_option("-a", "--tryaltconfigs", help = "Continue with builds by trying to use alternative providers where possible.",
+                   action = "store_true", dest = "tryaltconfigs", default = False)
+
+        parser.add_option("-f", "--force", help = "Force the specified targets/task to run (invalidating any existing stamp file).",
+                   action = "store_true", dest = "force", default = False)
+
+        parser.add_option("-c", "--cmd", help = "Specify the task to execute. The exact options available depend on the metadata. Some examples might be 'compile' or 'populate_sysroot' or 'listtasks' may give a list of the tasks available.",
+                   action = "store", dest = "cmd")
+
+        parser.add_option("-C", "--clear-stamp", help = "Invalidate the stamp for the specified task such as 'compile' and then run the default task for the specified target(s).",
+                    action = "store", dest = "invalidate_stamp")
+
+        parser.add_option("-r", "--read", help = "Read the specified file before bitbake.conf.",
+                   action = "append", dest = "prefile", default = [])
+
+        parser.add_option("-R", "--postread", help = "Read the specified file after bitbake.conf.",
+                          action = "append", dest = "postfile", default = [])
+
+        parser.add_option("-v", "--verbose", help = "Output more log message data to the terminal.",
+                   action = "store_true", dest = "verbose", default = False)
+
+        parser.add_option("-D", "--debug", help = "Increase the debug level. You can specify this more than once.",
+                   action = "count", dest="debug", default = 0)
+
+        parser.add_option("-n", "--dry-run", help = "Don't execute, just go through the motions.",
+                   action = "store_true", dest = "dry_run", default = False)
+
+        parser.add_option("-S", "--dump-signatures", help = "Dump out the signature construction information, with no task execution. The SIGNATURE_HANDLER parameter is passed to the handler. Two common values are none and printdiff but the handler may define more/less. none means only dump the signature, printdiff means compare the dumped signature with the cached one.",
+                   action = "append", dest = "dump_signatures", default = [], metavar="SIGNATURE_HANDLER")
+
+        parser.add_option("-p", "--parse-only", help = "Quit after parsing the BB recipes.",
+                   action = "store_true", dest = "parse_only", default = False)
+
+        parser.add_option("-s", "--show-versions", help = "Show current and preferred versions of all recipes.",
+                   action = "store_true", dest = "show_versions", default = False)
+
+        parser.add_option("-e", "--environment", help = "Show the global or per-recipe environment complete with information about where variables were set/changed.",
+                   action = "store_true", dest = "show_environment", default = False)
+
+        parser.add_option("-g", "--graphviz", help = "Save dependency tree information for the specified targets in the dot syntax.",
+                    action = "store_true", dest = "dot_graph", default = False)
+
+        parser.add_option("-I", "--ignore-deps", help = """Assume these dependencies don't exist and are already provided (equivalent to ASSUME_PROVIDED). Useful to make dependency graphs more appealing""",
+                    action = "append", dest = "extra_assume_provided", default = [])
+
+        parser.add_option("-l", "--log-domains", help = """Show debug logging for the specified logging domains""",
+                    action = "append", dest = "debug_domains", default = [])
+
+        parser.add_option("-P", "--profile", help = "Profile the command and save reports.",
+                   action = "store_true", dest = "profile", default = False)
+
+        env_ui = os.environ.get('BITBAKE_UI', None)
+        default_ui = env_ui or 'knotty'
+        # @CHOICES@ is substituted out by BitbakeHelpFormatter above
+        parser.add_option("-u", "--ui", help = "The user interface to use (@CHOICES@ - default %default).",
+                   action="store", dest="ui", default=default_ui)
+
+        # @CHOICES@ is substituted out by BitbakeHelpFormatter above
+        parser.add_option("-t", "--servertype", help = "Choose which server type to use (@CHOICES@ - default %default).",
+                   action = "store", dest = "servertype", default = "process")
+
+        parser.add_option("", "--token", help = "Specify the connection token to be used when connecting to a remote server.",
+                   action = "store", dest = "xmlrpctoken")
+
+        parser.add_option("", "--revisions-changed", help = "Set the exit code depending on whether upstream floating revisions have changed or not.",
+                   action = "store_true", dest = "revisions_changed", default = False)
+
+        parser.add_option("", "--server-only", help = "Run bitbake without a UI, only starting a server (cooker) process.",
+                   action = "store_true", dest = "server_only", default = False)
+
+        parser.add_option("-B", "--bind", help = "The name/address for the bitbake server to bind to.",
+                   action = "store", dest = "bind", default = False)
+
+        parser.add_option("", "--no-setscene", help = "Do not run any setscene tasks. sstate will be ignored and everything needed, built.",
+                   action = "store_true", dest = "nosetscene", default = False)
+
+        parser.add_option("", "--remote-server", help = "Connect to the specified server.",
+                   action = "store", dest = "remote_server", default = False)
+
+        parser.add_option("-m", "--kill-server", help = "Terminate the remote server.",
+                    action = "store_true", dest = "kill_server", default = False)
+
+        parser.add_option("", "--observe-only", help = "Connect to a server as an observing-only client.",
+                   action = "store_true", dest = "observe_only", default = False)
+
+        parser.add_option("", "--status-only", help = "Check the status of the remote bitbake server.",
+                   action = "store_true", dest = "status_only", default = False)
+
+        parser.add_option("-w", "--write-log", help = "Writes the event log of the build to a bitbake event json file. Use '' (empty string) to assign the name automatically.",
+                   action = "store", dest = "writeeventlog")
+
+        options, targets = parser.parse_args(argv)
+
+        # some environmental variables set also configuration options
+        if "BBSERVER" in os.environ:
+            options.servertype = "xmlrpc"
+            options.remote_server = os.environ["BBSERVER"]
+
+        if "BBTOKEN" in os.environ:
+            options.xmlrpctoken = os.environ["BBTOKEN"]
+
+        if "BBEVENTLOG" is os.environ:
+            options.writeeventlog = os.environ["BBEVENTLOG"]
+
+        # fill in proper log name if not supplied
+        if options.writeeventlog is not None and len(options.writeeventlog) == 0:
+            import datetime
+            options.writeeventlog = "bitbake_eventlog_%s.json" % datetime.datetime.now().strftime("%Y%m%d%H%M%S")
+
+        # if BBSERVER says to autodetect, let's do that
+        if options.remote_server:
+            [host, port] = options.remote_server.split(":", 2)
+            port = int(port)
+            # use automatic port if port set to -1, means read it from
+            # the bitbake.lock file; this is a bit tricky, but we always expect
+            # to be in the base of the build directory if we need to have a
+            # chance to start the server later, anyway
+            if port == -1:
+                lock_location = "./bitbake.lock"
+                # we try to read the address at all times; if the server is not started,
+                # we'll try to start it after the first connect fails, below
+                try:
+                    lf = open(lock_location, 'r')
+                    remotedef = lf.readline()
+                    [host, port] = remotedef.split(":")
+                    port = int(port)
+                    lf.close()
+                    options.remote_server = remotedef
+                except Exception as e:
+                    raise BBMainException("Failed to read bitbake.lock (%s), invalid port" % str(e))
+
+        return options, targets[1:]
+
+
+def start_server(servermodule, configParams, configuration, features):
+    server = servermodule.BitBakeServer()
+    if configParams.bind:
+        (host, port) = configParams.bind.split(':')
+        server.initServer((host, int(port)))
+        configuration.interface = [ server.serverImpl.host, server.serverImpl.port ]
+    else:
+        server.initServer()
+        configuration.interface = []
+
+    try:
+        configuration.setServerRegIdleCallback(server.getServerIdleCB())
+
+        cooker = bb.cooker.BBCooker(configuration, features)
+
+        server.addcooker(cooker)
+        server.saveConnectionDetails()
+    except Exception as e:
+        exc_info = sys.exc_info()
+        while hasattr(server, "event_queue"):
+            try:
+                import queue
+            except ImportError:
+                import Queue as queue
+            try:
+                event = server.event_queue.get(block=False)
+            except (queue.Empty, IOError):
+                break
+            if isinstance(event, logging.LogRecord):
+                logger.handle(event)
+        raise exc_info[1], None, exc_info[2]
+    server.detach()
+    cooker.lock.close()
+    return server
+
+
+def bitbake_main(configParams, configuration):
+
+    # Python multiprocessing requires /dev/shm on Linux
+    if sys.platform.startswith('linux') and not os.access('/dev/shm', os.W_OK | os.X_OK):
+        raise BBMainException("FATAL: /dev/shm does not exist or is not writable")
+
+    # Unbuffer stdout to avoid log truncation in the event
+    # of an unorderly exit as well as to provide timely
+    # updates to log files for use with tail
+    try:
+        if sys.stdout.name == '<stdout>':
+            sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
+    except:
+        pass
+
+
+    configuration.setConfigParameters(configParams)
+
+    ui_module = import_extension_module(bb.ui, configParams.ui, 'main')
+    servermodule = import_extension_module(bb.server, configParams.servertype, 'BitBakeServer')
+
+    if configParams.server_only:
+        if configParams.servertype != "xmlrpc":
+            raise BBMainException("FATAL: If '--server-only' is defined, we must set the "
+                                  "servertype as 'xmlrpc'.\n")
+        if not configParams.bind:
+            raise BBMainException("FATAL: The '--server-only' option requires a name/address "
+                                  "to bind to with the -B option.\n")
+        if configParams.remote_server:
+            raise BBMainException("FATAL: The '--server-only' option conflicts with %s.\n" %
+                                  ("the BBSERVER environment variable" if "BBSERVER" in os.environ \
+                                   else "the '--remote-server' option" ))
+
+    if configParams.bind and configParams.servertype != "xmlrpc":
+        raise BBMainException("FATAL: If '-B' or '--bind' is defined, we must "
+                              "set the servertype as 'xmlrpc'.\n")
+
+    if configParams.remote_server and configParams.servertype != "xmlrpc":
+        raise BBMainException("FATAL: If '--remote-server' is defined, we must "
+                              "set the servertype as 'xmlrpc'.\n")
+
+    if configParams.observe_only and (not configParams.remote_server or configParams.bind):
+        raise BBMainException("FATAL: '--observe-only' can only be used by UI clients "
+                              "connecting to a server.\n")
+
+    if configParams.kill_server and not configParams.remote_server:
+        raise BBMainException("FATAL: '--kill-server' can only be used to terminate a remote server")
+
+    if "BBDEBUG" in os.environ:
+        level = int(os.environ["BBDEBUG"])
+        if level > configuration.debug:
+            configuration.debug = level
+
+    bb.msg.init_msgconfig(configParams.verbose, configuration.debug,
+                         configuration.debug_domains)
+
+    # Ensure logging messages get sent to the UI as events
+    handler = bb.event.LogHandler()
+    if not configParams.status_only:
+        # In status only mode there are no logs and no UI
+        logger.addHandler(handler)
+
+    # Clear away any spurious environment variables while we stoke up the cooker
+    cleanedvars = bb.utils.clean_environment()
+
+    featureset = []
+    if not configParams.server_only:
+        # Collect the feature set for the UI
+        featureset = getattr(ui_module, "featureSet", [])
+
+    if not configParams.remote_server:
+        # we start a server with a given configuration
+        server = start_server(servermodule, configParams, configuration, featureset)
+        bb.event.ui_queue = []
+    else:
+        # we start a stub server that is actually a XMLRPClient that connects to a real server
+        server = servermodule.BitBakeXMLRPCClient(configParams.observe_only, configParams.xmlrpctoken)
+        server.saveConnectionDetails(configParams.remote_server)
+
+
+    if not configParams.server_only:
+        try:
+            server_connection = server.establishConnection(featureset)
+        except Exception as e:
+            bb.fatal("Could not connect to server %s: %s" % (configParams.remote_server, str(e)))
+
+        # Restore the environment in case the UI needs it
+        for k in cleanedvars:
+            os.environ[k] = cleanedvars[k]
+
+        logger.removeHandler(handler)
+
+
+        if configParams.status_only:
+            server_connection.terminate()
+            return 0
+
+        if configParams.kill_server:
+            server_connection.connection.terminateServer()
+            bb.event.ui_queue = []
+            return 0
+
+        try:
+            return ui_module.main(server_connection.connection, server_connection.events, configParams)
+        finally:
+            bb.event.ui_queue = []
+            server_connection.terminate()
+    else:
+        print("Bitbake server address: %s, server port: %s" % (server.serverImpl.host, server.serverImpl.port))
+        return 0
+
+    return 1