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collective.monkeypatcher-1.2.1
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Support for applying monkey patches late in the startup cycle by using ZCML configuration actions
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | collective.monkeypatcher-1.2.1 |
| نام | collective.monkeypatcher |
| نسخه کتابخانه | 1.2.1 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Martin Aspeli |
| ایمیل نویسنده | optilude@gmail.com |
| آدرس صفحه اصلی | https://github.com/plone/collective.monkeypatcher |
| آدرس اینترنتی | https://pypi.org/project/collective.monkeypatcher/ |
| مجوز | BSD |
========================
collective.monkeypatcher
========================
.. image:: https://travis-ci.com/plone/collective.monkeypatcher.svg?branch=master
:target: https://travis-ci.com/plone/collective.monkeypatcher
.. image:: https://coveralls.io/repos/github/zopefoundation/collective.monkeypatcher/badge.svg?branch=master
:target: https://coveralls.io/github/zopefoundation/collective.monkeypatcher?branch=master
.. image:: https://img.shields.io/pypi/v/collective.monkeypatcher.svg
:target: https://pypi.org/project/collective.monkeypatcher/
:alt: Current version on PyPI
.. image:: https://img.shields.io/pypi/pyversions/collective.monkeypatcher.svg
:target: https://pypi.org/project/collective.monkeypatcher/
:alt: Supported Python versions
Introduction
============
Sometimes, a monkey patch is a necessary evil.
This package makes it easier to apply a monkey patch during Zope startup.
It uses the ZCML configuration machinery to ensure that patches are loaded
"late" in the startup cycle, so that the original code has had time to be
fully initialised and configured. This is similar to using the `initialize()`
method in a product's __init__.py, except it does not require that the package
be a full-blown Zope product with a persistent Control_Panel entry.
Installation
============
To install `collective.monkeypatcher` into the global Python environment
(or a working environment), using a traditional Zope instance, you can do this:
* When you're reading this you have probably already run
``pip install collective.monkeypatcher``.
* Create a file called ``collective.monkeypatcher-configure.zcml`` in the
``/path/to/instance/etc/package-includes`` directory. The file
should only contain this::
<include package="collective.monkeypatcher" />
Alternatively, if you are using `zc.buildout` and the
`plone.recipe.zope2instance` recipe to manage your project, you can do this:
* Add ``collective.monkeypatcher`` to the list of eggs to install, e.g.::
[buildout]
...
eggs =
...
collective.monkeypatcher
* Tell the plone.recipe.zope2instance recipe to install a ZCML slug::
[instance]
recipe = plone.recipe.zope2instance
...
zcml =
collective.monkeypatcher
* Re-run buildout, e.g. with::
$ ./bin/buildout
You can skip the ZCML slug if you are going to explicitly include the package
from another package's configure.zcml file.
Applying a monkey patch
=======================
Here's an example::
<configure
xmlns="http://namespaces.zope.org/zope"
xmlns:monkey="http://namespaces.plone.org/monkey"
i18n_domain="collective.monkeypatcher">
<include package="collective.monkeypatcher" />
<monkey:patch
description="This works around issue http://some.tracker.tld/ticket/123"
class="Products.CMFPlone.CatalogTool.CatalogTool"
original="searchResults"
replacement=".catalog.patchedSearchResults"
/>
</configure>
In this example, we patch Plone's CatalogTool's searchResults() function,
replacing it with our own version in catalog.py. To patch a module level
function, you can use `module` instead of `class`. The original class and
function/method name and the replacement symbol will be checked to ensure
that they actually exist.
If patching happens too soon (or too late), use the `order` attribute to
specify a higher (later) or lower (earlier) number. The default is 1000.
By default, `DocFinderTab <http://pypi.python.org/pypi/Products.DocFinderTab>`_
and other TTW API browsers will emphasize the monkey patched methods/functions,
appending the docstring with "Monkey patched with 'my.monkeypatched.function'".
If you don't want this, you could set the `docstringWarning` attribute to
`false`.
If you want to do more than just replace one function with another, you can
provide your own patcher function via the `handler` attribute. This should
be a callable like::
def apply_patch(scope, original, replacement):
...
Here, `scope` is the class/module that was specified. `original` is the string
name of the function to replace, and `replacement` is the replacement function.
Full list of options:
- ``class`` The class being patched
- ``module`` The module being patched (see `Patching module level functions`_)
- ``handler`` A function to perform the patching. Must take three parameters: class/module, original (string), and replacement
- ``original`` Method or function to replace
- ``replacement`` Method or function to replace with
- ``preservedoc`` Preserve docstrings?
- ``preserveOriginal`` Preserve the original function so that it is reachable view prefix _old_. Only works for default handler
- ``preconditions`` Preconditions (multiple, separated by space) to be satisified before applying this patch. Example: Products.LinguaPlone-=1.4.3 or Products.TextIndexNG3+=3.3.0
- ``ignoreOriginal`` Ignore if the orginal function isn't present on the class/module being patched
- ``docstringWarning`` Add monkey patch warning in docstring
- ``description`` Some comments about your monkey patch
- ``order`` Execution order
Handling monkey patches events
==============================
Applying a monkey patch fires an event. See the `interfaces.py` module. If you
to handle such event add this ZCML bunch::
...
<subscriber
for="collective.monkeypatcher.interfaces.IMonkeyPatchEvent"
handler="my.component.events.myHandler"
/>
...
And add such Python::
def myHandler(event):
"""see collective.monkeypatcher.interfaces.IMonkeyPatchEvent"""
...
Patching module level functions
===============================
.. ATTENTION:: Be aware that patching module level functions will likely not work.
If you want to patch the method `do_something` located in `patched.package.utils` which is imported in a package like this
::
from patched.package.utils import do_something
the reference to this function is loaded *before* `collective.monkeypatcher` will patch the original method.
See also `this related thread on the plone mailing list <http://plone.293351.n2.nabble.com/Monkey-Patch-Module-Level-td7557725.html>`_.
Workaround
----------
Do the patching in `__init__.py` of your package::
from patched.package import utils
def do_it_different():
return 'foo'
utils.do_something = do_it_different
Changelog
=========
.. You should *NOT* be adding new change log entries to this file.
You should create a file in the news directory instead.
For helpful instructions, please see:
https://github.com/plone/plone.releaser/blob/master/ADD-A-NEWS-ITEM.rst
.. towncrier release notes start
1.2.1 (2020-03-21)
------------------
Bug fixes:
- Minor packaging updates. [various] (#1)
1.2 (2018-12-10)
----------------
New features:
- Include installation instructions in the README.
- Update test infrastructure.
1.1.6 (2018-10-31)
------------------
Bug fixes:
- Prepare for Python 2 / 3 compatibility
[frapell]
1.1.5 (2018-06-18)
------------------
Bug fixes:
- Fix import for Python 3 in the tests module
[ale-rt]
1.1.4 (2018-04-08)
------------------
Bug fixes:
- Fix import for Python 3
[pbauer]
1.1.3 (2017-11-26)
------------------
New features:
- Document possible problems when patching module level functions
[frisi]
1.1.2 (2016-08-10)
------------------
Fixes:
- Use zope.interface decorator.
[gforcada]
1.1.1 (2015-03-27)
------------------
- Fix typo.
[gforcada]
1.1 - 2014-12-10
----------------
* Fix the case where the replacement object does not have a __module__
attribute (see https://github.com/plone/collective.monkeypatcher/pull/3).
[mitchellrj, fRiSi]
1.0.1 - 2011-01-25
------------------
* Downgrade standard log message to debug level.
[hannosch]
1.0 - 2010-07-01
----------------
* Avoid a zope.app dependency.
[hannosch]
* Added new parameter preconditions that only patches if preconditions are met
like version of a specific package.
[spamsch]
* Added new parameter preserveOriginal. Setting this to true makes it possible
to access the patched method via _old_``name of patched method``
[spamsch]
1.0b2 - 2009-06-18
------------------
* Add the possibility to ignore the error if the original function isn't
present on the class/module being patched
[jfroche]
* Check if the docstring exists before changing it
[jfroche]
* Add buildout.cfg for test & test coverage
[jfroche]
1.0b1 - 2009-04-17
------------------
* Fires an event when a monkey patch is applied. See interfaces.py.
[glenfant]
* Added ZCML attributes "docstringWarning" and "description".
[glenfant]
* Added unit tests.
[glenfant]
1.0a1 - 2009-03-29
------------------
* Initial release
[optilude]
نیازمندی
| مقدار | نام |
|---|---|
| - | six |
| - | setuptools |
| - | zope.component |
| - | zope.configuration |
نحوه نصب
نصب پکیج whl collective.monkeypatcher-1.2.1:
pip install collective.monkeypatcher-1.2.1.whl
نصب پکیج tar.gz collective.monkeypatcher-1.2.1:
pip install collective.monkeypatcher-1.2.1.tar.gz