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[commands] Fix command parameter handling in HelpCommand

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This commit is contained in:
Rapptz 2022-03-06 01:39:43 -05:00
parent fa901afa3a
commit 625c416f18
2 changed files with 10 additions and 13 deletions
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9
discord/ext/commands/core.py
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@ -124,12 +124,17 @@ def unwrap_function(function: Callable[..., Any]) -> Callable[..., Any]:
return function
def get_signature_parameters(function: Callable[..., Any], globalns: Dict[str, Any]) -> Dict[str, inspect.Parameter]:
def get_signature_parameters(
function: Callable[..., Any],
globalns: Dict[str, Any],
*,
skip_parameters: Optional[int] = None,
) -> Dict[str, inspect.Parameter]:
signature = inspect.signature(function)
params = {}
cache: Dict[str, Any] = {}
eval_annotation = discord.utils.evaluate_annotation
required_params = discord.utils.is_inside_class(function) + 1
required_params = discord.utils.is_inside_class(function) + 1 if skip_parameters is None else skip_parameters
if len(signature.parameters) < required_params:
raise TypeError(f'Command signature requires at least {required_params - 1} parameter(s)')

14
discord/ext/commands/help.py
View File

@ -32,7 +32,7 @@ from typing import Optional, TYPE_CHECKING
import discord.utils
from .core import Group, Command
from .core import Group, Command, get_signature_parameters
from .errors import CommandError
if TYPE_CHECKING:
@ -190,11 +190,13 @@ class _HelpCommandImpl(Command):
super().__init__(inject.command_callback, *args, **kwargs)
self._original = inject
self._injected = inject
self.params = get_signature_parameters(inject.command_callback, globals(), skip_parameters=1)
async def prepare(self, ctx):
self._injected = injected = self._original.copy()
injected.context = ctx
self.callback = injected.command_callback
self.params = get_signature_parameters(injected.command_callback, globals(), skip_parameters=1)
on_error = injected.on_help_command_error
if not hasattr(on_error, '__help_command_not_overriden__'):
@ -218,16 +220,6 @@ class _HelpCommandImpl(Command):
async def _on_error_cog_implementation(self, dummy, ctx, error):
await self._injected.on_help_command_error(ctx, error)
@property
def clean_params(self):
result = self.params.copy()
try:
del result[next(iter(result))]
except StopIteration:
raise ValueError('Missing context parameter') from None
else:
return result
def _inject_into_cog(self, cog):
# Warning: hacky