portage._emirrordist.MirrorDistTask module

class portage._emirrordist.MirrorDistTask.MirrorDistTask(config)

Bases: _emerge.CompositeTask.CompositeTask


Raises an AssertionError if the given task is not the same one as self._current_task. This can be useful for detecting bugs.


Override _async_wait to call self._cleanup().


Subclasses should implement this, as a template method to be called by AsynchronousTask.cancel().

_cancelled_returncode = -2

Cleanup any callbacks that have been registered with the global event loop.


Calls _assert_current() on the given task and then sets the composite returncode attribute if task.returncode != os.EX_OK. If the task failed then self._current_task will be set to None. Subclasses can use this as a generic task exit callback.

Return type



The task.returncode attribute.


This calls _final_exit() and then wait().

Subclasses can use this as a generic final task exit callback.


Assumes that task is the final task of this composite task. Calls _default_exit() and sets self.returncode to the task’s returncode and sets self._current_task to None.


This does a loop calling self._current_task.poll() repeatedly as long as the value of self._current_task keeps changing. It calls poll() a maximum of one time for a given self._current_task instance. This is useful since calling poll() on a task can trigger advance to the next task could eventually lead to the returncode being set in cases when polling only a single task would not have the same effect.

_start_task(task, exit_handler)

Register exit handler for the given task, set it as self._current_task, and call task.start().

Subclasses can use this as a generic way to start a task.


Call this method after the task completes, just before returning the returncode from wait() or poll(). This hook is used to trigger exit listeners when the returncode first becomes available.


If cancelled, set returncode if necessary and return True. Otherwise, return False.


The function will be called with one argument, a reference to self.


The function will be called with one argument, a reference to self.


Wait for returncode asynchronously. Notification is available via the add_done_callback method of the returned Future instance.


Future, result is self.returncode


Cancel the task, but do not wait for exit status. If asynchronous exit notification is desired, then use addExitListener to add a listener before calling this method. NOTE: Synchronous waiting for status is not supported, since it would be vulnerable to hitting the recursion limit when a large number of tasks need to be terminated simultaneously, like in bug #402335.


Create a new instance and copy all attributes defined from __slots__ (including those from inherited classes).


Start an asynchronous task and then return as soon as possible.


Wait for the returncode attribute to become ready, and return it. If the returncode is not ready and the event loop is already running, then the async_wait() method should be used instead of wait(), because wait() will raise asyncio.InvalidStateError in this case.

Return type



the value of self.returncode