view piecrust/events.py @ 613:e2e955a3bb25

publish: Add publish command. * Add `shell` publisher. * Refactor admin panel's publishing backend to use that, along with the new PID file support.
author Ludovic Chabant <ludovic@chabant.com>
date Thu, 04 Feb 2016 08:05:03 -0800
parents f485ba500df3
children f070a4fc033c
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class Event(object):
    def __init__(self):
        self._handlers = []

    def __iadd__(self, handler):
        self._handlers.append(handler)
        return self

    def __isub__(self, handler):
        self._handlers.remove(handler)
        return self

    def fire(self, *args, **kwargs):
        # Make a copy of the handlers list in case some handler removes
        # itself while executing.
        handlers = list(self._handlers)
        for handler in handlers:
            handler(*args, **kwargs)