def exception_msg_handler(signal, data):
"""
Handler for the ExceptionSignal signal.
:param signal: event data
:type signal: (event_type, message_data)
:param data: additional data
:type data: any
"""
global exception_processed
if exception_processed:
# get data from the event data structure
exception_info = signal.exception_info
stack_trace = "\n" + App.get_scheduler().dump_stack()
log.error(stack_trace)
# exception_info is a list
sys.excepthook(*exception_info)
else:
# show only the first exception do not spam user with others
exception_processed = True
loop = App.get_event_loop()
# start new loop for handling the exception
# this will stop processing all the old signals and prevent raising new exceptions
loop.execute_new_loop(signal)
def setup(self, data):
"""Construct all the objects required to implement this interface.
This method must be provided by all subclasses.
"""
# Use GLib event loop for the Simpleline TUI
loop = GLibEventLoop()
App.initialize(event_loop=loop)
loop.set_quit_callback(tui_quit_callback)
scheduler = App.get_scheduler()
scheduler.quit_screen = YesNoDialog(self.quitMessage)
# tell python-meh it should use our raw_input
meh_io_handler = meh.ui.text.IOHandler(in_func=self._get_meh_input_func)
self._meh_interface.set_io_handler(meh_io_handler)
# register handlers for various messages
loop = App.get_event_loop()
loop.register_signal_handler(ExceptionSignal, exception_msg_handler)
loop.register_signal_handler(SendMessageSignal, self._handle_show_message)
_hubs = self._list_hubs()
# First, grab a list of all the standalone spokes.
spokes = self._collectActionClasses(self.paths["spokes"], StandaloneSpoke)
actionClasses = self._orderActionClasses(spokes, _hubs)
for klass in actionClasses:
obj = klass(data, self.storage, self.payload, self.instclass)
# If we are doing a kickstart install, some standalone spokes
# could already be filled out. In that case, we do not want
# to display them.
if self._is_standalone(obj) and obj.completed:
del(obj)
continue
if hasattr(obj, "set_path"):
obj.set_path("spokes", self.paths["spokes"])
obj.set_path("categories", self.paths["categories"])
should_schedule = obj.setup(self.ENVIRONMENT)
if should_schedule:
scheduler.schedule_screen(obj)
def handleException(self, dump_info):
"""
Our own handleException method doing some additional stuff before
calling the original python-meh's one.
:type dump_info: an instance of the meh.DumpInfo class
:see: python-meh's ExceptionHandler.handleException
"""
log.debug("running handleException")
exception_lines = traceback.format_exception(*dump_info.exc_info)
log.critical("\n".join(exception_lines))
ty = dump_info.exc_info.type
value = dump_info.exc_info.value
try:
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk
# XXX: Gtk stopped raising RuntimeError if it fails to
# initialize. Horay! But will it stay like this? Let's be
# cautious and raise the exception on our own to work in both
# cases
initialized = Gtk.init_check(None)[0]
if not initialized:
raise RuntimeError()
# Attempt to grab the GUI initializing lock, do not block
if not self._gui_lock.acquire(False):
# the graphical interface is running, don't crash it by
# running another one potentially from a different thread
log.debug("Gtk running, queuing exception handler to the main loop")
run_in_loop(self._main_loop_handleException, dump_info)
else:
log.debug("Gtk not running, starting Gtk and running exception handler in it")
self._main_loop_handleException(dump_info)
except (RuntimeError, ImportError, ValueError):
log.debug("Gtk cannot be initialized")
# X not running (Gtk cannot be initialized)
if threadMgr.in_main_thread():
log.debug("In the main thread, running exception handler")
if issubclass(ty, NonInteractiveError) or not self._interactive:
if issubclass(ty, NonInteractiveError):
cmdline_error_msg = _("\nThe installation was stopped due to an "
"error which occurred while running in "
"non-interactive cmdline mode. Since there "
"cannot be any questions in cmdline mode, edit "
"your kickstart file and retry installation. "
"\nThe exact error message is: \n\n%s. \n\nThe "
"installer will now terminate.") % str(value)
else:
cmdline_error_msg = _("\nRunning in cmdline mode, no interactive "
"debugging allowed.\nThe exact error message is: "
"\n\n%s.\n\nThe installer will now terminate."
) % str(value)
# since there is no UI in cmdline mode and it is completely
# non-interactive, we can't show a message window asking the user
# to acknowledge the error; instead, print the error out and sleep
# for a few seconds before exiting the installer
print(cmdline_error_msg)
time.sleep(180)
sys.exit(1)
else:
print("\nAn unknown error has occured, look at the "
"/tmp/anaconda-tb* file(s) for more details")
# in the main thread, run exception handler
self._main_loop_handleException(dump_info)
else:
log.debug("In a non-main thread, sending a message with exception data")
# not in the main thread, just send message with exception
# data and let message handler run the exception handler in
# the main thread
exc_info = dump_info.exc_info
# new Simpleline package is now used in TUI. Look if Simpleline is
# initialized or if this is some fallback from GTK or other stuff.
if App.is_initialized():
# if Simpleline is initialized enqueue exception there
loop = App.get_event_loop()
loop.enqueue_signal(ExceptionSignal(App.get_scheduler(), exception_info=exc_info))
else:
hubQ.send_exception((exc_info.type,
exc_info.value,
exc_info.stack))
def test_close_screen_closed_from_other_source_error(self):
App.initialize()
App.get_scheduler().schedule_screen(UIScreen())
with self.assertRaises(RenderUnexpectedError):
App.get_scheduler().close_screen(closed_from=mock.MagicMock())
def _check_app_settings(self, event_loop, scheduler, configuration):
self.assertEqual(App.get_event_loop(), event_loop)
self.assertEqual(App.get_scheduler(), scheduler)
self.assertEqual(App.get_configuration(), configuration)
def test_failed_screen_setup(self):
screen = FailedSetupScreen()
App.initialize()
App.get_scheduler().schedule_screen(screen)
App.run()
def test_quit_input(self, mock_stdin, mock_stdout):
mock_stdin.return_value = "q"
screen = UIScreen()
App.get_scheduler().schedule_screen(screen)
App.run()
def handleException(self, dump_info):
"""
Our own handleException method doing some additional stuff before
calling the original python-meh's one.
:type dump_info: an instance of the meh.DumpInfo class
:see: python-meh's ExceptionHandler.handleException
"""
log.debug("running handleException")
exception_lines = traceback.format_exception(*dump_info.exc_info)
log.critical("\n".join(exception_lines))
ty = dump_info.exc_info.type
value = dump_info.exc_info.value
try:
gi.require_version("Gtk", "3.0")
from gi.repository import Gtk
# XXX: Gtk stopped raising RuntimeError if it fails to
# initialize. Horay! But will it stay like this? Let's be
# cautious and raise the exception on our own to work in both
# cases
initialized = Gtk.init_check(None)[0]
if not initialized:
raise RuntimeError()
# Attempt to grab the GUI initializing lock, do not block
if not self._gui_lock.acquire(False):
# the graphical interface is running, don't crash it by
# running another one potentially from a different thread
log.debug("Gtk running, queuing exception handler to the main loop")
run_in_loop(self._main_loop_handleException, dump_info)
else:
log.debug("Gtk not running, starting Gtk and running exception handler in it")
self._main_loop_handleException(dump_info)
except (RuntimeError, ImportError, ValueError):
log.debug("Gtk cannot be initialized")
# X not running (Gtk cannot be initialized)
if threadMgr.in_main_thread():
log.debug("In the main thread, running exception handler")
if issubclass(ty, NonInteractiveError) or not self._interactive:
if issubclass(ty, NonInteractiveError):
cmdline_error_msg = _("\nThe installation was stopped due to an "
"error which occurred while running in "
"non-interactive cmdline mode. Since there "
"cannot be any questions in cmdline mode, edit "
"your kickstart file and retry installation. "
"\nThe exact error message is: \n\n%s. \n\nThe "
"installer will now terminate.") % str(value)
else:
cmdline_error_msg = _("\nRunning in cmdline mode, no interactive "
"debugging allowed.\nThe exact error message is: "
"\n\n%s.\n\nThe installer will now terminate."
) % str(value)
# since there is no UI in cmdline mode and it is completely
# non-interactive, we can't show a message window asking the user
# to acknowledge the error; instead, print the error out and sleep
# for a few seconds before exiting the installer
print(cmdline_error_msg)
time.sleep(180)
sys.exit(1)
else:
print("\nAn unknown error has occured, look at the "
"/tmp/anaconda-tb* file(s) for more details")
# in the main thread, run exception handler
self._main_loop_handleException(dump_info)
else:
log.debug("In a non-main thread, sending a message with exception data")
# not in the main thread, just send message with exception
# data and let message handler run the exception handler in
# the main thread
exc_info = dump_info.exc_info
# new Simpleline package is now used in TUI. Look if Simpleline is
# initialized or if this is some fallback from GTK or other stuff.
if App.is_initialized():
# if Simpleline is initialized enqueue exception there
loop = App.get_event_loop()
loop.enqueue_signal(ExceptionSignal(App.get_scheduler(), exception_info=exc_info))
else:
hubQ.send_exception((exc_info.type,
exc_info.value,
exc_info.stack))
def schedule_screen_and_run(screen):
App.initialize()
App.get_scheduler().schedule_screen(screen)
App.run()
def test_create_instance_with_custom_scheduler(self):
App.initialize(scheduler=CustomScreenScheduler(CustomEventLoop()))
self.assertTrue(isinstance(App.get_scheduler(), CustomScreenScheduler))
def test_create_instance(self):
App.initialize()
self.assertTrue(isinstance(App.get_scheduler(), ScreenScheduler))
self.assertTrue(isinstance(App.get_event_loop(), MainLoop))
self.assertTrue(
isinstance(App.get_configuration(), GlobalConfiguration))
def schedule_screen_and_run_with_glib(self, screen):
self.setup_glib()
App.get_scheduler().schedule_screen(screen)
App.run()
def push_screen_modal(cls, ui_screen, args=None):
"""Schedule screen to the active scheduler.
See: `simpleline.render.screen_scheduler.push_screen_modal()`.
"""
App.get_scheduler().push_screen_modal(ui_screen=ui_screen, args=args)
def replace_screen(cls, ui_screen, args=None):
"""Schedule screen to the active scheduler.
See: `simpleline.render.screen_scheduler.replace_screen()`.
"""
App.get_scheduler().replace_screen(ui_screen=ui_screen, args=args)