zc.configuration 1.0

Extensions to zope.configuration

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• 1.0

  • Detailed Documentation

• Configuration Extensions for Filtering or Inhibiting Configuration

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1.0

Initial release.

Detailed Documentation

Configuration Extensions for Filtering or Inhibiting Configuration

The zc.configuration package provides some configuration directives for inhibiting configuration. The first of these is the excluse directive. It is used to exclude processing of configuration files. It is usedful when including a configuration that includes some other configuration that you don’t want. It must be used before including the files to be excluded.

First, let’s look at an example. The zope.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 include 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

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