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Fix Signature for Greedy/Optional converters

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Change Greedy to `[a]...` | `[a=1]...`
This commit is contained in:
Myst(MysterialPy) 2019-03-01 11:51:36 +10:00 committed by Rapptz
parent c960465366
commit 63c5892b43
1 changed files with 22 additions and 1 deletions
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23
discord/ext/commands/core.py
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@ -795,11 +795,23 @@ class Command(_BaseCommand):
return self.help.split('\n', 1)[0]
return ''
def _is_typing_optional(self, annotation):
try:
origin = annotation.__origin__
except AttributeError:
return False
if origin is not typing.Union:
return False
return annotation.__args__[-1] is type(None)
@property
def signature(self):
"""Returns a POSIX-like signature useful for help command output."""
result = []
parent = self.full_parent_name
if len(self.aliases) > 0:
aliases = '|'.join(self.aliases)
fmt = '[%s|%s]' % (self.name, aliases)
@ -819,16 +831,25 @@ class Command(_BaseCommand):
return ' '.join(result)
for name, param in params.items():
greedy = isinstance(param.annotation, converters._Greedy)
if param.default is not param.empty:
# We don't want None or '' to trigger the [name=value] case and instead it should
# do [name] since [name=None] or [name=] are not exactly useful for the user.
should_print = param.default if isinstance(param.default, str) else param.default is not None
if should_print:
result.append('[%s=%s]' % (name, param.default))
result.append('[%s=%s]' % (name, param.default) if not greedy else
'[%s=%s]...' % (name, param.default))
continue
else:
result.append('[%s]' % name)
elif param.kind == param.VAR_POSITIONAL:
result.append('[%s...]' % name)
elif greedy:
result.append('[%s]...' % name)
elif self._is_typing_optional(param.annotation):
result.append('[%s]' % name)
else:
result.append('<%s>' % name)