def _run_handlers(self, data):
"""Run handlers attached to this signal and clean source afterwards."""
signal = data.signal
source = data.source
handlers = data.handlers
if not self._force_quit:
try:
for handler in handlers:
handler.callback(signal, handler.data)
except ExitMainLoop:
self._quit_all_loops()
except Exception: # pylint: disable=broad-except
self.enqueue_signal(ExceptionSignal(self))
# based on GLib documentation we should clean source
# source will be removed from event loop context this way
source.destroy()
self._mark_signal_processed(signal)
def _process_screen(self):
"""Draws the current screen and returns True if user input is requested.
If modal screen is requested, starts a new loop and initiates redraw after it ends.
"""
top_screen = self._get_last_screen()
log.debug("Processing screen %s", top_screen)
# this screen is used first time (call setup() method)
if not top_screen.ui_screen.screen_ready:
if not top_screen.ui_screen.setup(top_screen.args):
# remove the screen and skip if setup went wrong
self._screen_stack.pop()
self.redraw()
log.warning("Screen %s setup wasn't successful", top_screen)
return
# get the widget tree from the screen and show it in the screen
try:
# refresh screen content
top_screen.ui_screen.refresh(top_screen.args)
# Screen was closed in the refresh method
if top_screen != self._get_last_screen():
return
# draw screen to the console
self._draw_screen(top_screen)
if top_screen.ui_screen.input_required:
log.debug("Input is required by %s screen", top_screen)
top_screen.ui_screen.get_input_with_error_check(
top_screen.args)
except ExitMainLoop: # pylint: disable=try-except-raise
raise
except Exception: # pylint: disable=broad-except
self._event_loop.enqueue_signal(ExceptionSignal(self))
return False
def process_input(self, user_input):
"""Process input from the screens.
:param user_input: User input string.
:type user_input: String.
:raises: ExitMainLoop or any other kind of exception from screen processing.
"""
# process the input, if it wasn't processed (valid)
# increment the error counter
try:
result = self._process_input(user_input)
except ExitMainLoop: # pylint: disable=try-except-raise
raise
except Exception: # pylint: disable=broad-except
App.get_event_loop().enqueue_signal(ExceptionSignal(self))
return
if result.was_successful():
self._input_error_counter = 0
else:
self._input_error_counter += 1
App.get_scheduler().process_input_result(result, self.input_error_threshold_exceeded)
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))
