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Diffstat (limited to 'src/pip/_vendor/rich/traceback.py')
| -rw-r--r-- | src/pip/_vendor/rich/traceback.py | 679 |
1 files changed, 679 insertions, 0 deletions
diff --git a/src/pip/_vendor/rich/traceback.py b/src/pip/_vendor/rich/traceback.py new file mode 100644 index 000000000..e5023c77a --- /dev/null +++ b/src/pip/_vendor/rich/traceback.py @@ -0,0 +1,679 @@ +from __future__ import absolute_import + +import os +import platform +import sys +from dataclasses import dataclass, field +from traceback import walk_tb +from types import ModuleType, TracebackType +from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Type, Union + +from pip._vendor.pygments.lexers import guess_lexer_for_filename +from pip._vendor.pygments.token import Comment, Keyword, Name, Number, Operator, String +from pip._vendor.pygments.token import Text as TextToken +from pip._vendor.pygments.token import Token +from pip._vendor.pygments.util import ClassNotFound + +from . import pretty +from ._loop import loop_last +from .columns import Columns +from .console import Console, ConsoleOptions, ConsoleRenderable, RenderResult, group +from .constrain import Constrain +from .highlighter import RegexHighlighter, ReprHighlighter +from .panel import Panel +from .scope import render_scope +from .style import Style +from .syntax import Syntax +from .text import Text +from .theme import Theme + +WINDOWS = platform.system() == "Windows" + +LOCALS_MAX_LENGTH = 10 +LOCALS_MAX_STRING = 80 + + +def install( + *, + console: Optional[Console] = None, + width: Optional[int] = 100, + extra_lines: int = 3, + theme: Optional[str] = None, + word_wrap: bool = False, + show_locals: bool = False, + indent_guides: bool = True, + suppress: Iterable[Union[str, ModuleType]] = (), + max_frames: int = 100, +) -> Callable[[Type[BaseException], BaseException, Optional[TracebackType]], Any]: + """Install a rich traceback handler. + + Once installed, any tracebacks will be printed with syntax highlighting and rich formatting. + + + Args: + console (Optional[Console], optional): Console to write exception to. Default uses internal Console instance. + width (Optional[int], optional): Width (in characters) of traceback. Defaults to 100. + extra_lines (int, optional): Extra lines of code. Defaults to 3. + theme (Optional[str], optional): Pygments theme to use in traceback. Defaults to ``None`` which will pick + a theme appropriate for the platform. + word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False. + show_locals (bool, optional): Enable display of local variables. Defaults to False. + indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True. + suppress (Sequence[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback. + + Returns: + Callable: The previous exception handler that was replaced. + + """ + traceback_console = Console(file=sys.stderr) if console is None else console + + def excepthook( + type_: Type[BaseException], + value: BaseException, + traceback: Optional[TracebackType], + ) -> None: + traceback_console.print( + Traceback.from_exception( + type_, + value, + traceback, + width=width, + extra_lines=extra_lines, + theme=theme, + word_wrap=word_wrap, + show_locals=show_locals, + indent_guides=indent_guides, + suppress=suppress, + max_frames=max_frames, + ) + ) + + def ipy_excepthook_closure(ip: Any) -> None: # pragma: no cover + tb_data = {} # store information about showtraceback call + default_showtraceback = ip.showtraceback # keep reference of default traceback + + def ipy_show_traceback(*args: Any, **kwargs: Any) -> None: + """wrap the default ip.showtraceback to store info for ip._showtraceback""" + nonlocal tb_data + tb_data = kwargs + default_showtraceback(*args, **kwargs) + + def ipy_display_traceback( + *args: Any, is_syntax: bool = False, **kwargs: Any + ) -> None: + """Internally called traceback from ip._showtraceback""" + nonlocal tb_data + exc_tuple = ip._get_exc_info() + + # do not display trace on syntax error + tb: Optional[TracebackType] = None if is_syntax else exc_tuple[2] + + # determine correct tb_offset + compiled = tb_data.get("running_compiled_code", False) + tb_offset = tb_data.get("tb_offset", 1 if compiled else 0) + # remove ipython internal frames from trace with tb_offset + for _ in range(tb_offset): + if tb is None: + break + tb = tb.tb_next + + excepthook(exc_tuple[0], exc_tuple[1], tb) + tb_data = {} # clear data upon usage + + # replace _showtraceback instead of showtraceback to allow ipython features such as debugging to work + # this is also what the ipython docs recommends to modify when subclassing InteractiveShell + ip._showtraceback = ipy_display_traceback + # add wrapper to capture tb_data + ip.showtraceback = ipy_show_traceback + ip.showsyntaxerror = lambda *args, **kwargs: ipy_display_traceback( + *args, is_syntax=True, **kwargs + ) + + try: # pragma: no cover + # if within ipython, use customized traceback + ip = get_ipython() # type: ignore[name-defined] + ipy_excepthook_closure(ip) + return sys.excepthook + except Exception: + # otherwise use default system hook + old_excepthook = sys.excepthook + sys.excepthook = excepthook + return old_excepthook + + +@dataclass +class Frame: + filename: str + lineno: int + name: str + line: str = "" + locals: Optional[Dict[str, pretty.Node]] = None + + +@dataclass +class _SyntaxError: + offset: int + filename: str + line: str + lineno: int + msg: str + + +@dataclass +class Stack: + exc_type: str + exc_value: str + syntax_error: Optional[_SyntaxError] = None + is_cause: bool = False + frames: List[Frame] = field(default_factory=list) + + +@dataclass +class Trace: + stacks: List[Stack] + + +class PathHighlighter(RegexHighlighter): + highlights = [r"(?P<dim>.*/)(?P<bold>.+)"] + + +class Traceback: + """A Console renderable that renders a traceback. + + Args: + trace (Trace, optional): A `Trace` object produced from `extract`. Defaults to None, which uses + the last exception. + width (Optional[int], optional): Number of characters used to traceback. Defaults to 100. + extra_lines (int, optional): Additional lines of code to render. Defaults to 3. + theme (str, optional): Override pygments theme used in traceback. + word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False. + show_locals (bool, optional): Enable display of local variables. Defaults to False. + indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True. + locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation. + Defaults to 10. + locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80. + suppress (Sequence[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback. + max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100. + + """ + + LEXERS = { + "": "text", + ".py": "python", + ".pxd": "cython", + ".pyx": "cython", + ".pxi": "pyrex", + } + + def __init__( + self, + trace: Optional[Trace] = None, + width: Optional[int] = 100, + extra_lines: int = 3, + theme: Optional[str] = None, + word_wrap: bool = False, + show_locals: bool = False, + indent_guides: bool = True, + locals_max_length: int = LOCALS_MAX_LENGTH, + locals_max_string: int = LOCALS_MAX_STRING, + suppress: Iterable[Union[str, ModuleType]] = (), + max_frames: int = 100, + ): + if trace is None: + exc_type, exc_value, traceback = sys.exc_info() + if exc_type is None or exc_value is None or traceback is None: + raise ValueError( + "Value for 'trace' required if not called in except: block" + ) + trace = self.extract( + exc_type, exc_value, traceback, show_locals=show_locals + ) + self.trace = trace + self.width = width + self.extra_lines = extra_lines + self.theme = Syntax.get_theme(theme or "ansi_dark") + self.word_wrap = word_wrap + self.show_locals = show_locals + self.indent_guides = indent_guides + self.locals_max_length = locals_max_length + self.locals_max_string = locals_max_string + + self.suppress: Sequence[str] = [] + for suppress_entity in suppress: + if not isinstance(suppress_entity, str): + assert ( + suppress_entity.__file__ is not None + ), f"{suppress_entity!r} must be a module with '__file__' attribute" + path = os.path.dirname(suppress_entity.__file__) + else: + path = suppress_entity + path = os.path.normpath(os.path.abspath(path)) + self.suppress.append(path) + self.max_frames = max(4, max_frames) if max_frames > 0 else 0 + + @classmethod + def from_exception( + cls, + exc_type: Type[Any], + exc_value: BaseException, + traceback: Optional[TracebackType], + width: Optional[int] = 100, + extra_lines: int = 3, + theme: Optional[str] = None, + word_wrap: bool = False, + show_locals: bool = False, + indent_guides: bool = True, + locals_max_length: int = LOCALS_MAX_LENGTH, + locals_max_string: int = LOCALS_MAX_STRING, + suppress: Iterable[Union[str, ModuleType]] = (), + max_frames: int = 100, + ) -> "Traceback": + """Create a traceback from exception info + + Args: + exc_type (Type[BaseException]): Exception type. + exc_value (BaseException): Exception value. + traceback (TracebackType): Python Traceback object. + width (Optional[int], optional): Number of characters used to traceback. Defaults to 100. + extra_lines (int, optional): Additional lines of code to render. Defaults to 3. + theme (str, optional): Override pygments theme used in traceback. + word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False. + show_locals (bool, optional): Enable display of local variables. Defaults to False. + indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True. + locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation. + Defaults to 10. + locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80. + suppress (Iterable[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback. + max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100. + + Returns: + Traceback: A Traceback instance that may be printed. + """ + rich_traceback = cls.extract( + exc_type, exc_value, traceback, show_locals=show_locals + ) + return cls( + rich_traceback, + width=width, + extra_lines=extra_lines, + theme=theme, + word_wrap=word_wrap, + show_locals=show_locals, + indent_guides=indent_guides, + locals_max_length=locals_max_length, + locals_max_string=locals_max_string, + suppress=suppress, + max_frames=max_frames, + ) + + @classmethod + def extract( + cls, + exc_type: Type[BaseException], + exc_value: BaseException, + traceback: Optional[TracebackType], + show_locals: bool = False, + locals_max_length: int = LOCALS_MAX_LENGTH, + locals_max_string: int = LOCALS_MAX_STRING, + ) -> Trace: + """Extract traceback information. + + Args: + exc_type (Type[BaseException]): Exception type. + exc_value (BaseException): Exception value. + traceback (TracebackType): Python Traceback object. + show_locals (bool, optional): Enable display of local variables. Defaults to False. + locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation. + Defaults to 10. + locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80. + + Returns: + Trace: A Trace instance which you can use to construct a `Traceback`. + """ + + stacks: List[Stack] = [] + is_cause = False + + from pip._vendor.rich import _IMPORT_CWD + + def safe_str(_object: Any) -> str: + """Don't allow exceptions from __str__ to propegate.""" + try: + return str(_object) + except Exception: + return "<exception str() failed>" + + while True: + stack = Stack( + exc_type=safe_str(exc_type.__name__), + exc_value=safe_str(exc_value), + is_cause=is_cause, + ) + + if isinstance(exc_value, SyntaxError): + stack.syntax_error = _SyntaxError( + offset=exc_value.offset or 0, + filename=exc_value.filename or "?", + lineno=exc_value.lineno or 0, + line=exc_value.text or "", + msg=exc_value.msg, + ) + + stacks.append(stack) + append = stack.frames.append + + for frame_summary, line_no in walk_tb(traceback): + filename = frame_summary.f_code.co_filename + if filename and not filename.startswith("<"): + if not os.path.isabs(filename): + filename = os.path.join(_IMPORT_CWD, filename) + if frame_summary.f_locals.get("_rich_traceback_omit", False): + continue + frame = Frame( + filename=filename or "?", + lineno=line_no, + name=frame_summary.f_code.co_name, + locals={ + key: pretty.traverse( + value, + max_length=locals_max_length, + max_string=locals_max_string, + ) + for key, value in frame_summary.f_locals.items() + } + if show_locals + else None, + ) + append(frame) + if frame_summary.f_locals.get("_rich_traceback_guard", False): + del stack.frames[:] + + cause = getattr(exc_value, "__cause__", None) + if cause and cause.__traceback__: + exc_type = cause.__class__ + exc_value = cause + traceback = cause.__traceback__ + is_cause = True + continue + + cause = exc_value.__context__ + if ( + cause + and cause.__traceback__ + and not getattr(exc_value, "__suppress_context__", False) + ): + exc_type = cause.__class__ + exc_value = cause + traceback = cause.__traceback__ + is_cause = False + continue + # No cover, code is reached but coverage doesn't recognize it. + break # pragma: no cover + + trace = Trace(stacks=stacks) + return trace + + def __rich_console__( + self, console: Console, options: ConsoleOptions + ) -> RenderResult: + theme = self.theme + background_style = theme.get_background_style() + token_style = theme.get_style_for_token + + traceback_theme = Theme( + { + "pretty": token_style(TextToken), + "pygments.text": token_style(Token), + "pygments.string": token_style(String), + "pygments.function": token_style(Name.Function), + "pygments.number": token_style(Number), + "repr.indent": token_style(Comment) + Style(dim=True), + "repr.str": token_style(String), + "repr.brace": token_style(TextToken) + Style(bold=True), + "repr.number": token_style(Number), + "repr.bool_true": token_style(Keyword.Constant), + "repr.bool_false": token_style(Keyword.Constant), + "repr.none": token_style(Keyword.Constant), + "scope.border": token_style(String.Delimiter), + "scope.equals": token_style(Operator), + "scope.key": token_style(Name), + "scope.key.special": token_style(Name.Constant) + Style(dim=True), + }, + inherit=False, + ) + + highlighter = ReprHighlighter() + for last, stack in loop_last(reversed(self.trace.stacks)): + if stack.frames: + stack_renderable: ConsoleRenderable = Panel( + self._render_stack(stack), + title="[traceback.title]Traceback [dim](most recent call last)", + style=background_style, + border_style="traceback.border", + expand=True, + padding=(0, 1), + ) + stack_renderable = Constrain(stack_renderable, self.width) + with console.use_theme(traceback_theme): + yield stack_renderable + if stack.syntax_error is not None: + with console.use_theme(traceback_theme): + yield Constrain( + Panel( + self._render_syntax_error(stack.syntax_error), + style=background_style, + border_style="traceback.border.syntax_error", + expand=True, + padding=(0, 1), + width=self.width, + ), + self.width, + ) + yield Text.assemble( + (f"{stack.exc_type}: ", "traceback.exc_type"), + highlighter(stack.syntax_error.msg), + ) + elif stack.exc_value: + yield Text.assemble( + (f"{stack.exc_type}: ", "traceback.exc_type"), + highlighter(stack.exc_value), + ) + else: + yield Text.assemble((f"{stack.exc_type}", "traceback.exc_type")) + + if not last: + if stack.is_cause: + yield Text.from_markup( + "\n[i]The above exception was the direct cause of the following exception:\n", + ) + else: + yield Text.from_markup( + "\n[i]During handling of the above exception, another exception occurred:\n", + ) + + @group() + def _render_syntax_error(self, syntax_error: _SyntaxError) -> RenderResult: + highlighter = ReprHighlighter() + path_highlighter = PathHighlighter() + if syntax_error.filename != "<stdin>": + text = Text.assemble( + (f" {syntax_error.filename}", "pygments.string"), + (":", "pygments.text"), + (str(syntax_error.lineno), "pygments.number"), + style="pygments.text", + ) + yield path_highlighter(text) + syntax_error_text = highlighter(syntax_error.line.rstrip()) + syntax_error_text.no_wrap = True + offset = min(syntax_error.offset - 1, len(syntax_error_text)) + syntax_error_text.stylize("bold underline", offset, offset) + syntax_error_text += Text.from_markup( + "\n" + " " * offset + "[traceback.offset]▲[/]", + style="pygments.text", + ) + yield syntax_error_text + + @classmethod + def _guess_lexer(cls, filename: str, code: str) -> str: + ext = os.path.splitext(filename)[-1] + if not ext: + # No extension, look at first line to see if it is a hashbang + # Note, this is an educated guess and not a guarantee + # If it fails, the only downside is that the code is highlighted strangely + new_line_index = code.index("\n") + first_line = code[:new_line_index] if new_line_index != -1 else code + if first_line.startswith("#!") and "python" in first_line.lower(): + return "python" + try: + return cls.LEXERS.get(ext) or guess_lexer_for_filename(filename, code).name + except ClassNotFound: + return "text" + + @group() + def _render_stack(self, stack: Stack) -> RenderResult: + path_highlighter = PathHighlighter() + theme = self.theme + code_cache: Dict[str, str] = {} + + def read_code(filename: str) -> str: + """Read files, and cache results on filename. + + Args: + filename (str): Filename to read + + Returns: + str: Contents of file + """ + code = code_cache.get(filename) + if code is None: + with open( + filename, "rt", encoding="utf-8", errors="replace" + ) as code_file: + code = code_file.read() + code_cache[filename] = code + return code + + def render_locals(frame: Frame) -> Iterable[ConsoleRenderable]: + if frame.locals: + yield render_scope( + frame.locals, + title="locals", + indent_guides=self.indent_guides, + max_length=self.locals_max_length, + max_string=self.locals_max_string, + ) + + exclude_frames: Optional[range] = None + if self.max_frames != 0: + exclude_frames = range( + self.max_frames // 2, + len(stack.frames) - self.max_frames // 2, + ) + + excluded = False + for frame_index, frame in enumerate(stack.frames): + + if exclude_frames and frame_index in exclude_frames: + excluded = True + continue + + if excluded: + assert exclude_frames is not None + yield Text( + f"\n... {len(exclude_frames)} frames hidden ...", + justify="center", + style="traceback.error", + ) + excluded = False + + first = frame_index == 0 + frame_filename = frame.filename + suppressed = any(frame_filename.startswith(path) for path in self.suppress) + + text = Text.assemble( + path_highlighter(Text(frame.filename, style="pygments.string")), + (":", "pygments.text"), + (str(frame.lineno), "pygments.number"), + " in ", + (frame.name, "pygments.function"), + style="pygments.text", + ) + if not frame.filename.startswith("<") and not first: + yield "" + yield text + if frame.filename.startswith("<"): + yield from render_locals(frame) + continue + if not suppressed: + try: + code = read_code(frame.filename) + lexer_name = self._guess_lexer(frame.filename, code) + syntax = Syntax( + code, + lexer_name, + theme=theme, + line_numbers=True, + line_range=( + frame.lineno - self.extra_lines, + frame.lineno + self.extra_lines, + ), + highlight_lines={frame.lineno}, + word_wrap=self.word_wrap, + code_width=88, + indent_guides=self.indent_guides, + dedent=False, + ) + yield "" + except Exception as error: + yield Text.assemble( + (f"\n{error}", "traceback.error"), + ) + else: + yield ( + Columns( + [ + syntax, + *render_locals(frame), + ], + padding=1, + ) + if frame.locals + else syntax + ) + + +if __name__ == "__main__": # pragma: no cover + + from .console import Console + + console = Console() + import sys + + def bar(a: Any) -> None: # 这是对亚洲语言支持的测试。面对模棱两可的想法，拒绝猜测的诱惑 + one = 1 + print(one / a) + + def foo(a: Any) -> None: + _rich_traceback_guard = True + zed = { + "characters": { + "Paul Atreides", + "Vladimir Harkonnen", + "Thufir Hawat", + "Duncan Idaho", + }, + "atomic_types": (None, False, True), + } + bar(a) + + def error() -> None: + + try: + try: + foo(0) + except: + slfkjsldkfj # type: ignore[name-defined] + except: + console.print_exception(show_locals=True) + + error() |