Fabric task function is wrapped by decorator.decorator

fabfile.py

from invoke import task, context
from decorator import decorator


def ctask(f, *args, **kwds):
    print('wraps')
    if len(args) >= 1 and isinstance(args[0], context.Context):
        print('context!')
        print(args[0])
        return
    return f(*args, **kwds)


@task
@decorator(ctask)
def hello(c, name='tommy'):
    """this is hello"""
    print(f'hello({name})')

run.sh

fab hello
# wraps
# context!
# <Context: <Config: {'run': {'warn': False, 'hide': None, 'shell': '/bin/bash', 'pty': False, 'fallback': True, 'env': {}, 'replace_env': True, 'echo': False, 'encoding': None, 'out_stream': None, 'err_stream': None, 'in_stream': None, 'watchers': [], 'echo_stdin': None}, 'runners': {'local': <class 'invoke.runners.Local'>, 'remote': <class 'fabric.runners.Remote'>}, 'sudo': {'prompt': '[sudo] password: ', 'password': None, 'user': None}, 'tasks': {'dedupe': True, 'auto_dash_names': True, 'collection_name': 'fabfile', 'search_root': None}, 'connect_kwargs': {'key_filename': []}, 'forward_agent': False, 'gateway': None, 'load_ssh_configs': True, 'port': 22, 'ssh_config_path': None, 'timeouts': {'connect': None}, 'user': 'ohtomi'}>>

fab -l
# Available tasks:
#
#  hello   this is hello
#