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# (C) Datadog, Inc. 2020-present
# All rights reserved
# Licensed under the Apache license (see LICENSE)
from __future__ import annotations
import importlib
from typing import Any
import click
from ._exceptions import MkDocsClickException
def load_command(module: str, attribute: str) -> click.Command:
"""
Load and return the Click command object located at '<module>:<attribute>'.
"""
command = _load_obj(module, attribute)
if not (isinstance(command, click.Command) or hasattr(command, "context_class")):
raise MkDocsClickException(
f"{attribute!r} must be a 'click.Command'-like object, got {type(command)}"
)
return command
def _load_obj(module: str, attribute: str) -> Any:
try:
mod = importlib.import_module(module)
except SystemExit:
raise MkDocsClickException("the module appeared to call sys.exit()") # pragma: no cover
try:
return getattr(mod, attribute)
except AttributeError:
raise MkDocsClickException(f"Module {module!r} has no attribute {attribute!r}")
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