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d731468f70
Summary: Last bits needed to get remotefilelog over bundle2 working. Includes tests. Test Plan: Ran tests, including with `--extra-config-opt experimental.bundle2-exp=True` Reviewers: davidsp, akushner, pyd, rmcelroy, daviser, durham Reviewed By: durham Differential Revision: https://phabricator.fb.com/D1671738 Tasks: 5568731 Signature: t1:1671738:1415676482:b9e7a1f308919526b0c41fee54d89da876518ec7
36 lines
1.3 KiB
Python
36 lines
1.3 KiB
Python
# shallowutil.py -- remotefilelog utilities
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#
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# Copyright 2014 Facebook, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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def interposeclass(container, classname):
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'''Interpose a class into the hierarchies of all loaded subclasses. This
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function is intended for use as a decorator.
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import mymodule
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@replaceclass(mymodule, 'myclass')
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class mysubclass(mymodule.myclass):
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def foo(self):
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f = super(mysubclass, self).foo()
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return f + ' bar'
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Existing instances of the class being replaced will not have their
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__class__ modified, so call this function before creating any
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objects of the target type. Note that this doesn't actually replace the
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class in the module -- that can cause problems when using e.g. super()
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to call a method in the parent class. Instead, new instances should be
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created using a factory of some sort that this extension can override.
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'''
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def wrap(cls):
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oldcls = getattr(container, classname)
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oldbases = (oldcls,)
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newbases = (cls,)
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for subcls in oldcls.__subclasses__():
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if subcls is not cls:
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assert subcls.__bases__ == oldbases
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subcls.__bases__ = newbases
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return cls
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return wrap
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