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# -*- coding: utf-8 -*-
# Copyright (C) 2014-2015 - Garrett Regier
#
# libpeas is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# libpeas 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
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
import gc
import gettext
import importlib
import os
import signal
import sys
import traceback
from gi.repository import GLib, GObject
# Derive from something not normally caught
class FailedError(BaseException):
pass
class Hooks(object):
def __init__(self):
if not ALREADY_INITIALIZED:
int_handler = signal.getsignal(signal.SIGINT)
# Use the default handler instead of raising KeyboardInterrupt
if int_handler == signal.default_int_handler:
signal.signal(signal.SIGINT, signal.SIG_DFL)
# See PySys_SetArgvEx()
sys.argv = [PRGNAME]
sys.path.pop(0)
sys.path.insert(0, PEAS_PYEXECDIR)
gettext.install(GETTEXT_PACKAGE, PEAS_LOCALEDIR)
self.__idle_gc = 0
self.__module_cache = {}
self.__extension_cache = {}
@staticmethod
def failed():
# This is implemented by the plugin loader
raise NotImplementedError('Hooks.failed()')
@staticmethod
def format_plugin_exception():
formatted = traceback.format_exception(*sys.exc_info())
# Remove all mentions of this file
for i in range(len(formatted)):
if __file__ in formatted[i]:
while not formatted[i].startswith('Traceback'):
formatted[i] = ''
i -= 1
return ''.join(formatted)
def call(self, name, args, return_type):
try:
result = getattr(self, name)(*args)
except FailedError:
raise
except:
self.failed("Failed to run internal Python hook '%s':\n%s" %
(name, traceback.format_exc()))
# We always allow None
if result is not None and not isinstance(result, return_type):
self.failed("Failed to run internal Python hook '%s': "
"expected %s, got %s" %
(name, return_type, result))
return result
def load(self, filename, module_dir, module_name):
try:
return self.__module_cache[filename]
except KeyError:
pass
if module_name in sys.modules:
self.__module_cache[filename] = None
self.failed("Error loading plugin '%s': "
"module name '%s' has already been used" %
(filename, module_name))
if module_dir not in sys.path:
sys.path.insert(0, module_dir)
try:
module = importlib.import_module(module_name)
except:
module = None
self.failed("Error importing plugin '%s':\n%s" %
(module_name, self.format_plugin_exception()))
else:
self.__extension_cache[module] = {}
finally:
self.__module_cache[filename] = module
return module
def find_extension_type(self, gtype, module):
module_gtypes = self.__extension_cache[module]
try:
return module_gtypes[gtype]
except KeyError:
pass
try:
keys = module.__all__
except AttributeError:
keys = module.__dict__
for key in keys:
value = getattr(module, key)
try:
value_gtype = value.__gtype__
except AttributeError:
continue
if GObject.type_is_a(value_gtype, gtype):
module_gtypes[gtype] = value
return value
module_gtypes[gtype] = None
return None
def __run_gc(self):
gc.collect()
self.__idle_gc = 0
return False
def garbage_collect(self):
# We run the GC right now and we schedule
# a further collection in the main loop
gc.collect()
if self.__idle_gc == 0:
self.__idle_gc = GLib.idle_add(self.__run_gc)
GLib.source_set_name_by_id(self.__idle_gc, '[libpeas] run_gc')
def all_plugins_unloaded(self):
pass
def exit(self):
gc.collect()
if self.__idle_gc != 0:
GLib.source_remove(self.__idle_gc)
if os.getenv('PEAS_PYTHON_PROFILE') is not None:
import cProfile
import pstats
import threading
import weakref
class Hooks(Hooks):
def __init__(self):
super(Hooks, self).__init__()
sort = os.getenv('PEAS_PYTHON_PROFILE', default='time')
self.__stat_sort = sort.split(';')
self.__stats = None
self.__stats_lock = threading.Lock()
self.__thread_refs = []
self.__thread_local = threading.local()
threading.setprofile(self.__init_thread)
self.__profile = cProfile.Profile()
self.__profile.enable()
def __add_stats(self, profile):
profile.disable()
with self.__stats_lock:
if self.__stats is None:
self.__stats = pstats.Stats(profile)
else:
self.__stats.add(profile)
def __init_thread(self, *unused):
# Only call once per thread
sys.setprofile(None)
thread_profile = cProfile.Profile()
def thread_finished(thread_ref):
self.__add_stats(thread_profile)
self.__thread_refs.remove(thread_ref)
# Need something to weakref, the
# current thread does not support it
thread_ref = set()
self.__thread_local.ref = thread_ref
self.__thread_refs.append(weakref.ref(thread_ref,
thread_finished))
# Only enable the profile at the end
thread_profile.enable()
def all_plugins_unloaded(self):
super(Hooks, self).all_plugins_unloaded()
self.__add_stats(self.__profile)
with self.__stats_lock:
stats = self.__stats.strip_dirs()
stats.sort_stats(*self.__stat_sort)
stats.print_stats()
# Need to create a new profile to avoid adding the stats twice
self.__profile = cProfile.Profile()
self.__profile.enable()
def exit(self):
super(Hooks, self).exit()
self.__profile.disable()
hooks = Hooks()
# ex:ts=4:et:
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