93 lines
3.3 KiB
Python
93 lines
3.3 KiB
Python
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from __future__ import annotations
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import ast
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import contextlib
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import inspect
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import sys
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import types
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import warnings
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from code import InteractiveConsole
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import outcome
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import trio
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import trio.lowlevel
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from trio._util import final
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@final
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class TrioInteractiveConsole(InteractiveConsole):
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# code.InteractiveInterpreter defines locals as Mapping[str, Any]
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# but when we pass this to FunctionType it expects a dict. So
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# we make the type more specific on our subclass
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locals: dict[str, object]
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def __init__(self, repl_locals: dict[str, object] | None = None):
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super().__init__(locals=repl_locals)
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self.compile.compiler.flags |= ast.PyCF_ALLOW_TOP_LEVEL_AWAIT
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def runcode(self, code: types.CodeType) -> None:
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func = types.FunctionType(code, self.locals)
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if inspect.iscoroutinefunction(func):
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result = trio.from_thread.run(outcome.acapture, func)
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else:
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result = trio.from_thread.run_sync(outcome.capture, func)
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if isinstance(result, outcome.Error):
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# If it is SystemExit, quit the repl. Otherwise, print the traceback.
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# If there is a SystemExit inside a BaseExceptionGroup, it probably isn't
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# the user trying to quit the repl, but rather an error in the code. So, we
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# don't try to inspect groups for SystemExit. Instead, we just print and
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# return to the REPL.
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if isinstance(result.error, SystemExit):
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raise result.error
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else:
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# Inline our own version of self.showtraceback that can use
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# outcome.Error.error directly to print clean tracebacks.
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# This also means overriding self.showtraceback does nothing.
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sys.last_type, sys.last_value = type(result.error), result.error
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sys.last_traceback = result.error.__traceback__
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# see https://docs.python.org/3/library/sys.html#sys.last_exc
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if sys.version_info >= (3, 12):
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sys.last_exc = result.error
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# We always use sys.excepthook, unlike other implementations.
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# This means that overriding self.write also does nothing to tbs.
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sys.excepthook(sys.last_type, sys.last_value, sys.last_traceback)
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async def run_repl(console: TrioInteractiveConsole) -> None:
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banner = (
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f"trio REPL {sys.version} on {sys.platform}\n"
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f'Use "await" directly instead of "trio.run()".\n'
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f'Type "help", "copyright", "credits" or "license" '
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f"for more information.\n"
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f'{getattr(sys, "ps1", ">>> ")}import trio'
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)
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try:
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await trio.to_thread.run_sync(console.interact, banner)
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finally:
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warnings.filterwarnings(
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"ignore",
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message=r"^coroutine .* was never awaited$",
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category=RuntimeWarning,
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)
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def main(original_locals: dict[str, object]) -> None:
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with contextlib.suppress(ImportError):
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import readline # noqa: F401
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repl_locals: dict[str, object] = {"trio": trio}
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for key in {
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"__name__",
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"__package__",
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"__loader__",
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"__spec__",
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"__builtins__",
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"__file__",
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}:
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repl_locals[key] = original_locals[key]
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console = TrioInteractiveConsole(repl_locals)
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trio.run(run_repl, console)
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