Lazy task references

In some places you might need to define a task lazily. For example before, after, and cleanup tasks can reference tasks by name. Under the hood this will create a lazy_task that will be resolved when the task is run.

For example the following are equivalent:

from quickie import task, lazy_task

@task
def task1():
    print("Task 1")

@task(after=["task1"])
def task2():
    print("Task 2")

@task(after=[lazy_task("task1")])
def task2():
    print("Task 2")

Lazy tasks will simply load the appropriate task when you try to initialize them. It will do so by using the context passed to the task.

from quickie import task, lazy_task

@task
def task1():
    print("Task 1")

@task(bind=True)
def task2(self):
    task1_reference = lazy_task("task1")
    task1_instance = task1_reference(context=self.context)
    task1_instance.run()
    print("Task 2")

# Calling task2 will print:
# This will print:
# Task 1
# Task 2