##// END OF EJS Templates
Add history file to debugger....
Add history file to debugger. This adds a configurable `InteractiveShell.debugger_history_file=...` which default to `~/.pdbhistory`, that store what is typed in ipdb; this make it easy to persist across sessions. Some of the logic is moved into the debugger itself so that existance and creation of file is used only once Pdb is started.

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interactiveshell.py
695 lines | 25.7 KiB | text/x-python | PythonLexer
"""IPython terminal interface using prompt_toolkit"""
import asyncio
import os
import sys
import warnings
from warnings import warn
from IPython.core.interactiveshell import InteractiveShell, InteractiveShellABC
from IPython.utils import io
from IPython.utils.py3compat import input
from IPython.utils.terminal import toggle_set_term_title, set_term_title, restore_term_title
from IPython.utils.process import abbrev_cwd
from traitlets import (
Bool,
Unicode,
Dict,
Integer,
observe,
Instance,
Type,
default,
Enum,
Union,
Any,
validate,
Float,
)
from prompt_toolkit.auto_suggest import AutoSuggestFromHistory
from prompt_toolkit.enums import DEFAULT_BUFFER, EditingMode
from prompt_toolkit.filters import (HasFocus, Condition, IsDone)
from prompt_toolkit.formatted_text import PygmentsTokens
from prompt_toolkit.history import InMemoryHistory
from prompt_toolkit.layout.processors import ConditionalProcessor, HighlightMatchingBracketProcessor
from prompt_toolkit.output import ColorDepth
from prompt_toolkit.patch_stdout import patch_stdout
from prompt_toolkit.shortcuts import PromptSession, CompleteStyle, print_formatted_text
from prompt_toolkit.styles import DynamicStyle, merge_styles
from prompt_toolkit.styles.pygments import style_from_pygments_cls, style_from_pygments_dict
from prompt_toolkit import __version__ as ptk_version
from pygments.styles import get_style_by_name
from pygments.style import Style
from pygments.token import Token
from .debugger import TerminalPdb, Pdb
from .magics import TerminalMagics
from .pt_inputhooks import get_inputhook_name_and_func
from .prompts import Prompts, ClassicPrompts, RichPromptDisplayHook
from .ptutils import IPythonPTCompleter, IPythonPTLexer
from .shortcuts import create_ipython_shortcuts
DISPLAY_BANNER_DEPRECATED = object()
PTK3 = ptk_version.startswith('3.')
class _NoStyle(Style): pass
_style_overrides_light_bg = {
Token.Prompt: '#ansibrightblue',
Token.PromptNum: '#ansiblue bold',
Token.OutPrompt: '#ansibrightred',
Token.OutPromptNum: '#ansired bold',
}
_style_overrides_linux = {
Token.Prompt: '#ansibrightgreen',
Token.PromptNum: '#ansigreen bold',
Token.OutPrompt: '#ansibrightred',
Token.OutPromptNum: '#ansired bold',
}
def get_default_editor():
try:
return os.environ['EDITOR']
except KeyError:
pass
except UnicodeError:
warn("$EDITOR environment variable is not pure ASCII. Using platform "
"default editor.")
if os.name == 'posix':
return 'vi' # the only one guaranteed to be there!
else:
return 'notepad' # same in Windows!
# conservatively check for tty
# overridden streams can result in things like:
# - sys.stdin = None
# - no isatty method
for _name in ('stdin', 'stdout', 'stderr'):
_stream = getattr(sys, _name)
if not _stream or not hasattr(_stream, 'isatty') or not _stream.isatty():
_is_tty = False
break
else:
_is_tty = True
_use_simple_prompt = ('IPY_TEST_SIMPLE_PROMPT' in os.environ) or (not _is_tty)
def black_reformat_handler(text_before_cursor):
import black
formatted_text = black.format_str(text_before_cursor, mode=black.FileMode())
if not text_before_cursor.endswith('\n') and formatted_text.endswith('\n'):
formatted_text = formatted_text[:-1]
return formatted_text
class TerminalInteractiveShell(InteractiveShell):
mime_renderers = Dict().tag(config=True)
space_for_menu = Integer(6, help='Number of line at the bottom of the screen '
'to reserve for the tab completion menu, '
'search history, ...etc, the height of '
'these menus will at most this value. '
'Increase it is you prefer long and skinny '
'menus, decrease for short and wide.'
).tag(config=True)
pt_app = None
debugger_history = None
debugger_history_file = Unicode(
"~/.pdbhistory", help="File in which to store and read history"
).tag(config=True)
simple_prompt = Bool(_use_simple_prompt,
help="""Use `raw_input` for the REPL, without completion and prompt colors.
Useful when controlling IPython as a subprocess, and piping STDIN/OUT/ERR. Known usage are:
IPython own testing machinery, and emacs inferior-shell integration through elpy.
This mode default to `True` if the `IPY_TEST_SIMPLE_PROMPT`
environment variable is set, or the current terminal is not a tty."""
).tag(config=True)
@property
def debugger_cls(self):
return Pdb if self.simple_prompt else TerminalPdb
confirm_exit = Bool(True,
help="""
Set to confirm when you try to exit IPython with an EOF (Control-D
in Unix, Control-Z/Enter in Windows). By typing 'exit' or 'quit',
you can force a direct exit without any confirmation.""",
).tag(config=True)
editing_mode = Unicode('emacs',
help="Shortcut style to use at the prompt. 'vi' or 'emacs'.",
).tag(config=True)
emacs_bindings_in_vi_insert_mode = Bool(
True,
help="Add shortcuts from 'emacs' insert mode to 'vi' insert mode.",
).tag(config=True)
modal_cursor = Bool(
True,
help="""
Cursor shape changes depending on vi mode: beam in vi insert mode,
block in nav mode, underscore in replace mode.""",
).tag(config=True)
ttimeoutlen = Float(
0.01,
help="""The time in milliseconds that is waited for a key code
to complete.""",
).tag(config=True)
timeoutlen = Float(
0.5,
help="""The time in milliseconds that is waited for a mapped key
sequence to complete.""",
).tag(config=True)
autoformatter = Unicode(None,
help="Autoformatter to reformat Terminal code. Can be `'black'` or `None`",
allow_none=True
).tag(config=True)
mouse_support = Bool(False,
help="Enable mouse support in the prompt\n(Note: prevents selecting text with the mouse)"
).tag(config=True)
# We don't load the list of styles for the help string, because loading
# Pygments plugins takes time and can cause unexpected errors.
highlighting_style = Union([Unicode('legacy'), Type(klass=Style)],
help="""The name or class of a Pygments style to use for syntax
highlighting. To see available styles, run `pygmentize -L styles`."""
).tag(config=True)
@validate('editing_mode')
def _validate_editing_mode(self, proposal):
if proposal['value'].lower() == 'vim':
proposal['value']= 'vi'
elif proposal['value'].lower() == 'default':
proposal['value']= 'emacs'
if hasattr(EditingMode, proposal['value'].upper()):
return proposal['value'].lower()
return self.editing_mode
@observe('editing_mode')
def _editing_mode(self, change):
if self.pt_app:
self.pt_app.editing_mode = getattr(EditingMode, change.new.upper())
@observe('autoformatter')
def _autoformatter_changed(self, change):
formatter = change.new
if formatter is None:
self.reformat_handler = lambda x:x
elif formatter == 'black':
self.reformat_handler = black_reformat_handler
else:
raise ValueError
@observe('highlighting_style')
@observe('colors')
def _highlighting_style_changed(self, change):
self.refresh_style()
def refresh_style(self):
self._style = self._make_style_from_name_or_cls(self.highlighting_style)
highlighting_style_overrides = Dict(
help="Override highlighting format for specific tokens"
).tag(config=True)
true_color = Bool(False,
help="""Use 24bit colors instead of 256 colors in prompt highlighting.
If your terminal supports true color, the following command should
print ``TRUECOLOR`` in orange::
printf \"\\x1b[38;2;255;100;0mTRUECOLOR\\x1b[0m\\n\"
""",
).tag(config=True)
editor = Unicode(get_default_editor(),
help="Set the editor used by IPython (default to $EDITOR/vi/notepad)."
).tag(config=True)
prompts_class = Type(Prompts, help='Class used to generate Prompt token for prompt_toolkit').tag(config=True)
prompts = Instance(Prompts)
@default('prompts')
def _prompts_default(self):
return self.prompts_class(self)
# @observe('prompts')
# def _(self, change):
# self._update_layout()
@default('displayhook_class')
def _displayhook_class_default(self):
return RichPromptDisplayHook
term_title = Bool(True,
help="Automatically set the terminal title"
).tag(config=True)
term_title_format = Unicode("IPython: {cwd}",
help="Customize the terminal title format. This is a python format string. " +
"Available substitutions are: {cwd}."
).tag(config=True)
display_completions = Enum(('column', 'multicolumn','readlinelike'),
help= ( "Options for displaying tab completions, 'column', 'multicolumn', and "
"'readlinelike'. These options are for `prompt_toolkit`, see "
"`prompt_toolkit` documentation for more information."
),
default_value='multicolumn').tag(config=True)
highlight_matching_brackets = Bool(True,
help="Highlight matching brackets.",
).tag(config=True)
extra_open_editor_shortcuts = Bool(False,
help="Enable vi (v) or Emacs (C-X C-E) shortcuts to open an external editor. "
"This is in addition to the F2 binding, which is always enabled."
).tag(config=True)
handle_return = Any(None,
help="Provide an alternative handler to be called when the user presses "
"Return. This is an advanced option intended for debugging, which "
"may be changed or removed in later releases."
).tag(config=True)
enable_history_search = Bool(True,
help="Allows to enable/disable the prompt toolkit history search"
).tag(config=True)
prompt_includes_vi_mode = Bool(True,
help="Display the current vi mode (when using vi editing mode)."
).tag(config=True)
@observe('term_title')
def init_term_title(self, change=None):
# Enable or disable the terminal title.
if self.term_title:
toggle_set_term_title(True)
set_term_title(self.term_title_format.format(cwd=abbrev_cwd()))
else:
toggle_set_term_title(False)
def restore_term_title(self):
if self.term_title:
restore_term_title()
def init_display_formatter(self):
super(TerminalInteractiveShell, self).init_display_formatter()
# terminal only supports plain text
self.display_formatter.active_types = ['text/plain']
# disable `_ipython_display_`
self.display_formatter.ipython_display_formatter.enabled = False
def init_prompt_toolkit_cli(self):
if self.simple_prompt:
# Fall back to plain non-interactive output for tests.
# This is very limited.
def prompt():
prompt_text = "".join(x[1] for x in self.prompts.in_prompt_tokens())
lines = [input(prompt_text)]
prompt_continuation = "".join(x[1] for x in self.prompts.continuation_prompt_tokens())
while self.check_complete('\n'.join(lines))[0] == 'incomplete':
lines.append( input(prompt_continuation) )
return '\n'.join(lines)
self.prompt_for_code = prompt
return
# Set up keyboard shortcuts
key_bindings = create_ipython_shortcuts(self)
# Pre-populate history from IPython's history database
history = InMemoryHistory()
last_cell = u""
for __, ___, cell in self.history_manager.get_tail(self.history_load_length,
include_latest=True):
# Ignore blank lines and consecutive duplicates
cell = cell.rstrip()
if cell and (cell != last_cell):
history.append_string(cell)
last_cell = cell
self._style = self._make_style_from_name_or_cls(self.highlighting_style)
self.style = DynamicStyle(lambda: self._style)
editing_mode = getattr(EditingMode, self.editing_mode.upper())
self.pt_loop = asyncio.new_event_loop()
self.pt_app = PromptSession(
auto_suggest=AutoSuggestFromHistory(),
editing_mode=editing_mode,
key_bindings=key_bindings,
history=history,
completer=IPythonPTCompleter(shell=self),
enable_history_search=self.enable_history_search,
style=self.style,
include_default_pygments_style=False,
mouse_support=self.mouse_support,
enable_open_in_editor=self.extra_open_editor_shortcuts,
color_depth=self.color_depth,
tempfile_suffix=".py",
**self._extra_prompt_options()
)
def _make_style_from_name_or_cls(self, name_or_cls):
"""
Small wrapper that make an IPython compatible style from a style name
We need that to add style for prompt ... etc.
"""
style_overrides = {}
if name_or_cls == 'legacy':
legacy = self.colors.lower()
if legacy == 'linux':
style_cls = get_style_by_name('monokai')
style_overrides = _style_overrides_linux
elif legacy == 'lightbg':
style_overrides = _style_overrides_light_bg
style_cls = get_style_by_name('pastie')
elif legacy == 'neutral':
# The default theme needs to be visible on both a dark background
# and a light background, because we can't tell what the terminal
# looks like. These tweaks to the default theme help with that.
style_cls = get_style_by_name('default')
style_overrides.update({
Token.Number: '#ansigreen',
Token.Operator: 'noinherit',
Token.String: '#ansiyellow',
Token.Name.Function: '#ansiblue',
Token.Name.Class: 'bold #ansiblue',
Token.Name.Namespace: 'bold #ansiblue',
Token.Name.Variable.Magic: '#ansiblue',
Token.Prompt: '#ansigreen',
Token.PromptNum: '#ansibrightgreen bold',
Token.OutPrompt: '#ansired',
Token.OutPromptNum: '#ansibrightred bold',
})
# Hack: Due to limited color support on the Windows console
# the prompt colors will be wrong without this
if os.name == 'nt':
style_overrides.update({
Token.Prompt: '#ansidarkgreen',
Token.PromptNum: '#ansigreen bold',
Token.OutPrompt: '#ansidarkred',
Token.OutPromptNum: '#ansired bold',
})
elif legacy =='nocolor':
style_cls=_NoStyle
style_overrides = {}
else :
raise ValueError('Got unknown colors: ', legacy)
else :
if isinstance(name_or_cls, str):
style_cls = get_style_by_name(name_or_cls)
else:
style_cls = name_or_cls
style_overrides = {
Token.Prompt: '#ansigreen',
Token.PromptNum: '#ansibrightgreen bold',
Token.OutPrompt: '#ansired',
Token.OutPromptNum: '#ansibrightred bold',
}
style_overrides.update(self.highlighting_style_overrides)
style = merge_styles([
style_from_pygments_cls(style_cls),
style_from_pygments_dict(style_overrides),
])
return style
@property
def pt_complete_style(self):
return {
'multicolumn': CompleteStyle.MULTI_COLUMN,
'column': CompleteStyle.COLUMN,
'readlinelike': CompleteStyle.READLINE_LIKE,
}[self.display_completions]
@property
def color_depth(self):
return (ColorDepth.TRUE_COLOR if self.true_color else None)
def _extra_prompt_options(self):
"""
Return the current layout option for the current Terminal InteractiveShell
"""
def get_message():
return PygmentsTokens(self.prompts.in_prompt_tokens())
if self.editing_mode == 'emacs':
# with emacs mode the prompt is (usually) static, so we call only
# the function once. With VI mode it can toggle between [ins] and
# [nor] so we can't precompute.
# here I'm going to favor the default keybinding which almost
# everybody uses to decrease CPU usage.
# if we have issues with users with custom Prompts we can see how to
# work around this.
get_message = get_message()
options = {
'complete_in_thread': False,
'lexer':IPythonPTLexer(),
'reserve_space_for_menu':self.space_for_menu,
'message': get_message,
'prompt_continuation': (
lambda width, lineno, is_soft_wrap:
PygmentsTokens(self.prompts.continuation_prompt_tokens(width))),
'multiline': True,
'complete_style': self.pt_complete_style,
# Highlight matching brackets, but only when this setting is
# enabled, and only when the DEFAULT_BUFFER has the focus.
'input_processors': [ConditionalProcessor(
processor=HighlightMatchingBracketProcessor(chars='[](){}'),
filter=HasFocus(DEFAULT_BUFFER) & ~IsDone() &
Condition(lambda: self.highlight_matching_brackets))],
}
if not PTK3:
options['inputhook'] = self.inputhook
return options
def prompt_for_code(self):
if self.rl_next_input:
default = self.rl_next_input
self.rl_next_input = None
else:
default = ''
# 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
asyncio.set_event_loop(self.pt_loop)
try:
with patch_stdout(raw=True):
text = self.pt_app.prompt(
default=default,
**self._extra_prompt_options())
finally:
# Restore the original event loop.
asyncio.set_event_loop(old_loop)
return text
def enable_win_unicode_console(self):
# Since IPython 7.10 doesn't support python < 3.6 and PEP 528, Python uses the unicode APIs for the Windows
# console by default, so WUC shouldn't be needed.
from warnings import warn
warn("`enable_win_unicode_console` is deprecated since IPython 7.10, does not do anything and will be removed in the future",
DeprecationWarning,
stacklevel=2)
def init_io(self):
if sys.platform not in {'win32', 'cli'}:
return
import colorama
colorama.init()
# For some reason we make these wrappers around stdout/stderr.
# For now, we need to reset them so all output gets coloured.
# https://github.com/ipython/ipython/issues/8669
# io.std* are deprecated, but don't show our own deprecation warnings
# during initialization of the deprecated API.
with warnings.catch_warnings():
warnings.simplefilter('ignore', DeprecationWarning)
io.stdout = io.IOStream(sys.stdout)
io.stderr = io.IOStream(sys.stderr)
def init_magics(self):
super(TerminalInteractiveShell, self).init_magics()
self.register_magics(TerminalMagics)
def init_alias(self):
# The parent class defines aliases that can be safely used with any
# frontend.
super(TerminalInteractiveShell, self).init_alias()
# Now define aliases that only make sense on the terminal, because they
# need direct access to the console in a way that we can't emulate in
# GUI or web frontend
if os.name == 'posix':
for cmd in ('clear', 'more', 'less', 'man'):
self.alias_manager.soft_define_alias(cmd, cmd)
def __init__(self, *args, **kwargs):
super(TerminalInteractiveShell, self).__init__(*args, **kwargs)
self.init_prompt_toolkit_cli()
self.init_term_title()
self.keep_running = True
def ask_exit(self):
self.keep_running = False
rl_next_input = None
def interact(self, display_banner=DISPLAY_BANNER_DEPRECATED):
if display_banner is not DISPLAY_BANNER_DEPRECATED:
warn('interact `display_banner` argument is deprecated since IPython 5.0. Call `show_banner()` if needed.', DeprecationWarning, stacklevel=2)
self.keep_running = True
while self.keep_running:
print(self.separate_in, end='')
try:
code = self.prompt_for_code()
except EOFError:
if (not self.confirm_exit) \
or self.ask_yes_no('Do you really want to exit ([y]/n)?','y','n'):
self.ask_exit()
else:
if code:
self.run_cell(code, store_history=True)
def mainloop(self, display_banner=DISPLAY_BANNER_DEPRECATED):
# An extra layer of protection in case someone mashing Ctrl-C breaks
# out of our internal code.
if display_banner is not DISPLAY_BANNER_DEPRECATED:
warn('mainloop `display_banner` argument is deprecated since IPython 5.0. Call `show_banner()` if needed.', DeprecationWarning, stacklevel=2)
while True:
try:
self.interact()
break
except KeyboardInterrupt as e:
print("\n%s escaped interact()\n" % type(e).__name__)
finally:
# An interrupt during the eventloop will mess up the
# internal state of the prompt_toolkit library.
# Stopping the eventloop fixes this, see
# https://github.com/ipython/ipython/pull/9867
if hasattr(self, '_eventloop'):
self._eventloop.stop()
self.restore_term_title()
# try to call some at-exit operation optimistically as some things can't
# be done during interpreter shutdown. this is technically inaccurate as
# this make mainlool not re-callable, but that should be a rare if not
# in existent use case.
self._atexit_once()
_inputhook = None
def inputhook(self, context):
if self._inputhook is not None:
self._inputhook(context)
active_eventloop = None
def enable_gui(self, gui=None):
if gui and (gui != 'inline') :
self.active_eventloop, self._inputhook =\
get_inputhook_name_and_func(gui)
else:
self.active_eventloop = self._inputhook = None
# For prompt_toolkit 3.0. We have to create an asyncio event loop with
# this inputhook.
if PTK3:
import asyncio
from prompt_toolkit.eventloop import new_eventloop_with_inputhook
if gui == 'asyncio':
# When we integrate the asyncio event loop, run the UI in the
# same event loop as the rest of the code. don't use an actual
# input hook. (Asyncio is not made for nesting event loops.)
self.pt_loop = asyncio.get_event_loop()
elif self._inputhook:
# If an inputhook was set, create a new asyncio event loop with
# this inputhook for the prompt.
self.pt_loop = new_eventloop_with_inputhook(self._inputhook)
else:
# When there's no inputhook, run the prompt in a separate
# asyncio event loop.
self.pt_loop = asyncio.new_event_loop()
# Run !system commands directly, not through pipes, so terminal programs
# work correctly.
system = InteractiveShell.system_raw
def auto_rewrite_input(self, cmd):
"""Overridden from the parent class to use fancy rewriting prompt"""
if not self.show_rewritten_input:
return
tokens = self.prompts.rewrite_prompt_tokens()
if self.pt_app:
print_formatted_text(PygmentsTokens(tokens), end='',
style=self.pt_app.app.style)
print(cmd)
else:
prompt = ''.join(s for t, s in tokens)
print(prompt, cmd, sep='')
_prompts_before = None
def switch_doctest_mode(self, mode):
"""Switch prompts to classic for %doctest_mode"""
if mode:
self._prompts_before = self.prompts
self.prompts = ClassicPrompts(self)
elif self._prompts_before:
self.prompts = self._prompts_before
self._prompts_before = None
# self._update_layout()
InteractiveShellABC.register(TerminalInteractiveShell)
if __name__ == '__main__':
TerminalInteractiveShell.instance().interact()