Viewing file:  autocommand.py (2.45 KB) -rw-r--r--
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# Copyright 2014-2015 Nathan West
#
# This file is part of autocommand.
#
# autocommand is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# autocommand is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with autocommand. If not, see <http://www.gnu.org/licenses/>.
from .autoparse import autoparse
from .automain import automain
try:
from .autoasync import autoasync
except ImportError: # pragma: no cover
pass
def autocommand(
module, *,
description=None,
epilog=None,
add_nos=False,
parser=None,
loop=None,
forever=False,
pass_loop=False):
if callable(module):
raise TypeError('autocommand requires a module name argument')
def autocommand_decorator(func):
# Step 1: if requested, run it all in an asyncio event loop. autoasync
# patches the __signature__ of the decorated function, so that in the
# event that pass_loop is True, the `loop` parameter of the original
# function will *not* be interpreted as a command-line argument by
# autoparse
if loop is not None or forever or pass_loop:
func = autoasync(
func,
loop=None if loop is True else loop,
pass_loop=pass_loop,
forever=forever)
# Step 2: create parser. We do this second so that the arguments are
# parsed and passed *before* entering the asyncio event loop, if it
# exists. This simplifies the stack trace and ensures errors are
# reported earlier. It also ensures that errors raised during parsing &
# passing are still raised if `forever` is True.
func = autoparse(
func,
description=description,
epilog=epilog,
add_nos=add_nos,
parser=parser)
# Step 3: call the function automatically if __name__ == '__main__' (or
# if True was provided)
func = automain(module)(func)
return func
return autocommand_decorator
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