import asyncio import signal import sys from IPython.core.debugger import Pdb from IPython.core.completer import IPCompleter from .ptutils import IPythonPTCompleter from .shortcuts import suspend_to_bg, cursor_in_leading_ws from prompt_toolkit.enums import DEFAULT_BUFFER from prompt_toolkit.filters import (Condition, has_focus, has_selection, vi_insert_mode, emacs_insert_mode) from prompt_toolkit.key_binding import KeyBindings from prompt_toolkit.key_binding.bindings.completion import display_completions_like_readline from pygments.token import Token from prompt_toolkit.shortcuts.prompt import PromptSession from prompt_toolkit.enums import EditingMode from prompt_toolkit.formatted_text import PygmentsTokens from prompt_toolkit import __version__ as ptk_version PTK3 = ptk_version.startswith('3.') class TerminalPdb(Pdb): """Standalone IPython debugger.""" def __init__(self, *args, **kwargs): Pdb.__init__(self, *args, **kwargs) self._ptcomp = None self.pt_init() def pt_init(self): def get_prompt_tokens(): return [(Token.Prompt, self.prompt)] if self._ptcomp is None: compl = IPCompleter(shell=self.shell, namespace={}, global_namespace={}, parent=self.shell, ) self._ptcomp = IPythonPTCompleter(compl) kb = KeyBindings() supports_suspend = Condition(lambda: hasattr(signal, 'SIGTSTP')) kb.add('c-z', filter=supports_suspend)(suspend_to_bg) if self.shell.display_completions == 'readlinelike': kb.add('tab', filter=(has_focus(DEFAULT_BUFFER) & ~has_selection & vi_insert_mode | emacs_insert_mode & ~cursor_in_leading_ws ))(display_completions_like_readline) options = dict( message=(lambda: PygmentsTokens(get_prompt_tokens())), editing_mode=getattr(EditingMode, self.shell.editing_mode.upper()), key_bindings=kb, history=self.shell.debugger_history, completer=self._ptcomp, enable_history_search=True, mouse_support=self.shell.mouse_support, complete_style=self.shell.pt_complete_style, style=self.shell.style, color_depth=self.shell.color_depth, ) if not PTK3: options['inputhook'] = self.shell.inputhook self.pt_loop = asyncio.new_event_loop() self.pt_app = PromptSession(**options) def cmdloop(self, intro=None): """Repeatedly issue a prompt, accept input, parse an initial prefix off the received input, and dispatch to action methods, passing them the remainder of the line as argument. override the same methods from cmd.Cmd to provide prompt toolkit replacement. """ if not self.use_rawinput: raise ValueError('Sorry ipdb does not support use_rawinput=False') # In order to make sure that asyncio code written in the # interactive shell doesn't interfere with the prompt, we run the # prompt in a different event loop. # If we don't do this, people could spawn coroutine with a # while/true inside which will freeze the prompt. try: old_loop = asyncio.get_event_loop() except RuntimeError: # This happens when the user used `asyncio.run()`. old_loop = None self.preloop() try: if intro is not None: self.intro = intro if self.intro: self.stdout.write(str(self.intro)+"\n") stop = None while not stop: if self.cmdqueue: line = self.cmdqueue.pop(0) else: self._ptcomp.ipy_completer.namespace = self.curframe_locals self._ptcomp.ipy_completer.global_namespace = self.curframe.f_globals asyncio.set_event_loop(self.pt_loop) try: line = self.pt_app.prompt() except EOFError: line = 'EOF' finally: # Restore the original event loop. asyncio.set_event_loop(old_loop) line = self.precmd(line) stop = self.onecmd(line) stop = self.postcmd(stop, line) self.postloop() except Exception: raise def set_trace(frame=None): """ Start debugging from `frame`. If frame is not specified, debugging starts from caller's frame. """ TerminalPdb().set_trace(frame or sys._getframe().f_back) if __name__ == '__main__': import pdb # IPython.core.debugger.Pdb.trace_dispatch shall not catch # bdb.BdbQuit. When started through __main__ and an exception # happened after hitting "c", this is needed in order to # be able to quit the debugging session (see #9950). old_trace_dispatch = pdb.Pdb.trace_dispatch pdb.Pdb = TerminalPdb pdb.Pdb.trace_dispatch = old_trace_dispatch pdb.main()