# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
"""
BitBake 'Event' implementation
Classes and functions for manipulating 'events' in the
BitBake build tools.
"""
# Copyright (C) 2003, 2004 Chris Larson
#
# 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, sys
import warnings
try:
import cPickle as pickle
except ImportError:
import pickle
import logging
import atexit
import traceback
import bb.utils
# This is the pid for which we should generate the event. This is set when
# the runqueue forks off.
worker_pid = 0
worker_pipe = None
logger = logging.getLogger('BitBake.Event')
class Event(object):
"""Base class for events"""
def __init__(self):
self.pid = worker_pid
NotHandled = 0
Handled = 1
Registered = 10
AlreadyRegistered = 14
# Internal
_handlers = {}
_ui_handlers = {}
_ui_handler_seq = 0
# For compatibility
bb.utils._context["NotHandled"] = NotHandled
bb.utils._context["Handled"] = Handled
def execute_handler(name, handler, event, d):
event.data = d
try:
ret = handler(event)
except bb.parse.SkipPackage:
raise
except Exception:
etype, value, tb = sys.exc_info()
logger.error("Execution of event handler '%s' failed" % name,
exc_info=(etype, value, tb.tb_next))
raise
except SystemExit as exc:
if exc.code != 0:
logger.error("Execution of event handler '%s' failed" % name)
raise
finally:
del event.data
if ret is not None:
warnings.warn("Using Handled/NotHandled in event handlers is deprecated",
DeprecationWarning, stacklevel = 2)
def fire_class_handlers(event, d):
if isinstance(event, logging.LogRecord):
return
for name, handler in _handlers.iteritems():
try:
execute_handler(name, handler, event, d)
except Exception:
continue
ui_queue = []
@atexit.register
def print_ui_queue():
"""If we're exiting before a UI has been spawned, display any queued
LogRecords to the console."""
logger = logging.getLogger("BitBake")
if not _ui_handlers:
from bb.msg import BBLogFormatter
console = logging.StreamHandler(sys.stdout)
console.setFormatter(BBLogFormatter("%(levelname)s: %(message)s"))
logger.handlers = [console]
for event in ui_queue:
if isinstance(event, logging.LogRecord):
logger.handle(event)
def fire_ui_handlers(event, d):
if not _ui_handlers:
# No UI handlers registered yet, queue up the messages
ui_queue.append(event)
return
errors = []
for h in _ui_handlers:
#print "Sending event %s" % event
try:
# We use pickle here since it better handles object instances
# which xmlrpc's marshaller does not. Events *must* be serializable
# by pickle.
if hasattr(_ui_handlers[h].event, "sendpickle"):
_ui_handlers[h].event.sendpickle((pickle.dumps(event)))
else:
_ui_handlers[h].event.send(event)
except:
errors.append(h)
for h in errors:
del _ui_handlers[h]
def fire(event, d):
"""Fire off an Event"""
# We can fire class handlers in the worker process context and this is
# desired so they get the task based datastore.
# UI handlers need to be fired in the server context so we defer this. They
# don't have a datastore so the datastore context isn't a problem.
fire_class_handlers(event, d)
if worker_pid != 0:
worker_fire(event, d)
else:
fire_ui_handlers(event, d)
def worker_fire(event, d):
data = "" + pickle.dumps(event) + ""
worker_pipe.write(data)
def fire_from_worker(event, d):
if not event.startswith("") or not event.endswith(""):
print("Error, not an event %s" % event)
return
event = pickle.loads(event[7:-8])
fire_ui_handlers(event, d)
noop = lambda _: None
def register(name, handler):
"""Register an Event handler"""
# already registered
if name in _handlers:
return AlreadyRegistered
if handler is not None:
# handle string containing python code
if isinstance(handler, basestring):
tmp = "def %s(e):\n%s" % (name, handler)
try:
code = compile(tmp, "%s(e)" % name, "exec")
except SyntaxError:
logger.error("Unable to register event handler '%s':\n%s", name,
''.join(traceback.format_exc(limit=0)))
_handlers[name] = noop
return
env = {}
bb.utils.simple_exec(code, env)
func = bb.utils.better_eval(name, env)
_handlers[name] = func
else:
_handlers[name] = handler
return Registered
def remove(name, handler):
"""Remove an Event handler"""
_handlers.pop(name)
def register_UIHhandler(handler):
bb.event._ui_handler_seq = bb.event._ui_handler_seq + 1
_ui_handlers[_ui_handler_seq] = handler
return _ui_handler_seq
def unregister_UIHhandler(handlerNum):
if handlerNum in _ui_handlers:
del _ui_handlers[handlerNum]
return
def getName(e):
"""Returns the name of a class or class instance"""
if getattr(e, "__name__", None) == None:
return e.__class__.__name__
else:
return e.__name__
class OperationStarted(Event):
"""An operation has begun"""
def __init__(self, msg = "Operation Started"):
Event.__init__(self)
self.msg = msg
class OperationCompleted(Event):
"""An operation has completed"""
def __init__(self, total, msg = "Operation Completed"):
Event.__init__(self)
self.total = total
self.msg = msg
class OperationProgress(Event):
"""An operation is in progress"""
def __init__(self, current, total, msg = "Operation in Progress"):
Event.__init__(self)
self.current = current
self.total = total
self.msg = msg + ": %s/%s" % (current, total);
class ConfigParsed(Event):
"""Configuration Parsing Complete"""
class RecipeEvent(Event):
def __init__(self, fn):
self.fn = fn
Event.__init__(self)
class RecipePreFinalise(RecipeEvent):
""" Recipe Parsing Complete but not yet finialised"""
class RecipeParsed(RecipeEvent):
""" Recipe Parsing Complete """
class StampUpdate(Event):
"""Trigger for any adjustment of the stamp files to happen"""
def __init__(self, targets, stampfns):
self._targets = targets
self._stampfns = stampfns
Event.__init__(self)
def getStampPrefix(self):
return self._stampfns
def getTargets(self):
return self._targets
stampPrefix = property(getStampPrefix)
targets = property(getTargets)
class BuildBase(Event):
"""Base class for bbmake run events"""
def __init__(self, n, p, failures = 0):
self._name = n
self._pkgs = p
Event.__init__(self)
self._failures = failures
def getPkgs(self):
return self._pkgs
def setPkgs(self, pkgs):
self._pkgs = pkgs
def getName(self):
return self._name
def setName(self, name):
self._name = name
def getCfg(self):
return self.data
def setCfg(self, cfg):
self.data = cfg
def getFailures(self):
"""
Return the number of failed packages
"""
return self._failures
pkgs = property(getPkgs, setPkgs, None, "pkgs property")
name = property(getName, setName, None, "name property")
cfg = property(getCfg, setCfg, None, "cfg property")
class BuildStarted(BuildBase, OperationStarted):
"""bbmake build run started"""
def __init__(self, n, p, failures = 0):
OperationStarted.__init__(self, "Building Started")
BuildBase.__init__(self, n, p, failures)
class BuildCompleted(BuildBase, OperationCompleted):
"""bbmake build run completed"""
def __init__(self, total, n, p, failures = 0):
if not failures:
OperationCompleted.__init__(self, total, "Building Succeeded")
else:
OperationCompleted.__init__(self, total, "Building Failed")
BuildBase.__init__(self, n, p, failures)
class NoProvider(Event):
"""No Provider for an Event"""
def __init__(self, item, runtime=False, dependees=None, reasons=[]):
Event.__init__(self)
self._item = item
self._runtime = runtime
self._dependees = dependees
self._reasons = reasons
def getItem(self):
return self._item
def isRuntime(self):
return self._runtime
class MultipleProviders(Event):
"""Multiple Providers"""
def __init__(self, item, candidates, runtime = False):
Event.__init__(self)
self._item = item
self._candidates = candidates
self._is_runtime = runtime
def isRuntime(self):
"""
Is this a runtime issue?
"""
return self._is_runtime
def getItem(self):
"""
The name for the to be build item
"""
return self._item
def getCandidates(self):
"""
Get the possible Candidates for a PROVIDER.
"""
return self._candidates
class ParseStarted(OperationStarted):
"""Recipe parsing for the runqueue has begun"""
def __init__(self, total):
OperationStarted.__init__(self, "Recipe parsing Started")
self.total = total
class ParseCompleted(OperationCompleted):
"""Recipe parsing for the runqueue has completed"""
def __init__(self, cached, parsed, skipped, masked, virtuals, errors, total):
OperationCompleted.__init__(self, total, "Recipe parsing Completed")
self.cached = cached
self.parsed = parsed
self.skipped = skipped
self.virtuals = virtuals
self.masked = masked
self.errors = errors
self.sofar = cached + parsed
class ParseProgress(OperationProgress):
"""Recipe parsing progress"""
def __init__(self, current, total):
OperationProgress.__init__(self, current, total, "Recipe parsing")
class CacheLoadStarted(OperationStarted):
"""Loading of the dependency cache has begun"""
def __init__(self, total):
OperationStarted.__init__(self, "Loading cache Started")
self.total = total
class CacheLoadProgress(OperationProgress):
"""Cache loading progress"""
def __init__(self, current, total):
OperationProgress.__init__(self, current, total, "Loading cache")
class CacheLoadCompleted(OperationCompleted):
"""Cache loading is complete"""
def __init__(self, total, num_entries):
OperationCompleted.__init__(self, total, "Loading cache Completed")
self.num_entries = num_entries
class TreeDataPreparationStarted(OperationStarted):
"""Tree data preparation started"""
def __init__(self):
OperationStarted.__init__(self, "Preparing tree data Started")
class TreeDataPreparationProgress(OperationProgress):
"""Tree data preparation is in progress"""
def __init__(self, current, total):
OperationProgress.__init__(self, current, total, "Preparing tree data")
class TreeDataPreparationCompleted(OperationCompleted):
"""Tree data preparation completed"""
def __init__(self, total):
OperationCompleted.__init__(self, total, "Preparing tree data Completed")
class DepTreeGenerated(Event):
"""
Event when a dependency tree has been generated
"""
def __init__(self, depgraph):
Event.__init__(self)
self._depgraph = depgraph
class TargetsTreeGenerated(Event):
"""
Event when a set of buildable targets has been generated
"""
def __init__(self, model):
Event.__init__(self)
self._model = model
class FilesMatchingFound(Event):
"""
Event when a list of files matching the supplied pattern has
been generated
"""
def __init__(self, pattern, matches):
Event.__init__(self)
self._pattern = pattern
self._matches = matches
class CoreBaseFilesFound(Event):
"""
Event when a list of appropriate config files has been generated
"""
def __init__(self, paths):
Event.__init__(self)
self._paths = paths
class ConfigFilesFound(Event):
"""
Event when a list of appropriate config files has been generated
"""
def __init__(self, variable, values):
Event.__init__(self)
self._variable = variable
self._values = values
class ConfigFilePathFound(Event):
"""
Event when a path for a config file has been found
"""
def __init__(self, path):
Event.__init__(self)
self._path = path
class MsgBase(Event):
"""Base class for messages"""
def __init__(self, msg):
self._message = msg
Event.__init__(self)
class MsgDebug(MsgBase):
"""Debug Message"""
class MsgNote(MsgBase):
"""Note Message"""
class MsgWarn(MsgBase):
"""Warning Message"""
class MsgError(MsgBase):
"""Error Message"""
class MsgFatal(MsgBase):
"""Fatal Message"""
class MsgPlain(MsgBase):
"""General output"""
class LogHandler(logging.Handler):
"""Dispatch logging messages as bitbake events"""
def emit(self, record):
if record.exc_info:
etype, value, tb = record.exc_info
if hasattr(tb, 'tb_next'):
tb = list(bb.exceptions.extract_traceback(tb, context=3))
record.bb_exc_info = (etype, value, tb)
record.exc_info = None
fire(record, None)
def filter(self, record):
record.taskpid = worker_pid
return True
class RequestPackageInfo(Event):
"""
Event to request package information
"""
class PackageInfo(Event):
"""
Package information for GUI
"""
def __init__(self, pkginfolist):
Event.__init__(self)
self._pkginfolist = pkginfolist
class SanityCheck(Event):
"""
Event to issue sanity check
"""
class SanityCheckPassed(Event):
"""
Event to indicate sanity check is passed
"""