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Extensions to zope.configuration

Project Description
******************************************************************
zope.configuration extensions to filter out unwanted configuration
******************************************************************

.. contents::

CHANGES
*******

1.2.0 (2017-04-17)
------------------

- Added ``MANIFEST.in``.

- Using Python's ``doctest`` module instead of depreacted
``zope.testing.doctest``.


1.1 (2009-02-26)
----------------

- Move the ``exclude`` directive into the original ``zope.configuration``
package.

So, this package is currently contains only a backward-compatibility
import for ``exclude`` directive and is not useful anymore. However
it's intended to contain miscellaneous extensions to the configuration
framework and may contain more in future, so we are not marking is
as deprecated for now.


1.0 (2007-09-29)
----------------

Initial release.

Detailed Documentation
**********************

Configuration Extensions for Filtering or Inhibiting Configuration
==================================================================

The zc.configuration package used to provide the ``exclude`` directive
for inhibiting configuration. It was included in the zope.configuration
and this package currently provides a backward-compatibility imports
and tests that ensure that it will work for people who are already
using zc.configuration and not the newer zope.configuration.

This package may contain more configuration extensions in future, but
currently, it's not useful anymore as the only feature it provided,
the ``exclude`` directive was merged into the original
``zope.configuration`` package.

First, let's look at an example. The zc.configuration.demo package
has a ZCML configuration that includes some other configuration files.

We'll set a log handler so we can see what's going on:

>>> import logging, sys
>>> logger = logging.getLogger('config')
>>> oldlevel = logger.level
>>> logger.setLevel(logging.DEBUG)
>>> handler = logging.StreamHandler(sys.stdout)
>>> logger.addHandler(handler)

Now, we'll include the zc.configuration.demo config:

>>> from zope.configuration import xmlconfig
>>> _ = xmlconfig.string('<include package="zc.configuration.demo" />')
include /zc.configuration/src/zc/configuration/demo/configure.zcml
include /zc.configuration/src/zc/configuration/demo/sub/configure.zcml
include /zc.configuration/src/zc/configuration/demo/spam.zcml

Each run of the configuration machinery runs with fresh state, so
rerunning gives the same thing:

>>> _ = xmlconfig.string('<include package="zc.configuration.demo" />')
include /zc.configuration/src/zc/configuration/demo/configure.zcml
include /zc.configuration/src/zc/configuration/demo/sub/configure.zcml
include /zc.configuration/src/zc/configuration/demo/spam.zcml

Now, we'll load the zc.configuration meta.zcml and use the exclude
directive to exclude the two files included by the configuration file
in zc.configuration.demo:

>>> _ = xmlconfig.string(
... '''
... <configure xmlns="http://namespaces.zope.org/zope">
... <include package="zc.configuration" file="meta.zcml" />
... <exclude package="zc.configuration.demo.sub" />
... <exclude package="zc.configuration.demo" file="spam.zcml" />
... <include package="zc.configuration.demo" />
... </configure>
... ''')
include /zc.configuration/src/zc/configuration/meta.zcml
include /zc.configuration/src/zc/configuration/demo/configure.zcml


.. cleanup

>>> logger.setLevel(oldlevel)
>>> logger.removeHandler(handler)

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