Make use of invoke klass param to simplify our daily CLI task

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# filename=tasks.py
import asyncio
from inspect import isgeneratorfunction, iscoroutinefunction

from invoke import Task
from invoke.tasks import task


class InvokeWrapper(Task):
    def __call__(self, *args, **kwargs):
        io_loop = asyncio.get_event_loop()
        if isgeneratorfunction(self.body):
            result = io_loop.run_until_complete(
                asyncio.coroutine(self.body)(*args, **kwargs)
            )
        elif iscoroutinefunction(self.body):
            result = io_loop.run_until_complete(self.body(*args, **kwargs))
        else:
            result = self.body(*args, **kwargs)
        self.times_called += 1
        return result


@task(klass=InvokeWrapper)
def foo(ctx):
    """sync task"""
    print("foo")


@task(klass=InvokeWrapper)
async def bar(ctx):
    """async/await style async task"""
    await asyncio.sleep(0.1)
    print("bar")


@task(klass=InvokeWrapper)
def baz(ctx):
    """yield from(< py3.6) style async task"""
    yield from asyncio.sleep(0.1)
    print("baz")

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~ inv -l
Available tasks:

  bar   async/await style async task
  baz   yield from(< py3.6) style async task
  foo   sync task

~ inv bar|foo|baz
bar
baz
foo