Experiment for configuring with venusian instead of *.zcml
This package (venusianconfiguration) provides venusian based Python configuration syntax for zope.configuration as an alternative to zcml. This package does not replace zope.configuration like grok used to do, but just provides generic Python bindings for existing zope.configuration directives. So, venusianconfiguration is more an alternative to grok than it is to zope.configuration.
The current status of this package can be described as already in internal use, but maybe not yet ready for the community.
from venusianconfiguration import configure configure.i18n.registerTranslations(directory='locales') @configure.browser.page.klass( name='hello-world', for_=Interface, permission='zope2.View') class HelloWorld(BrowserView): def __call__(self): return u'Hello world!' @configure.plone.behavior.provides( title=_(u'My behavior), description=_(u'Enables magic')) class IMyBehavior(model.Schema): custom_field = schema.TextLine() alsoProvides(IMyBehavior, IFormFieldProvider)
from venusianconfiguration import scan from venusianconfiguration import configure from mypackage import browser scan(browser) import zcmlpackage configure.include(package=zcmlpackage) import otherpypackage configure.include(package=otherpypackage, file='configure.py') import mypackage.submodule configure.include(package=mypackage.submodule, file='configure.py')
zope.configuration is mostly syntax-agnostic, but unfortunately ZCML has been the only implemented syntax for it and we have also used to call its ZCML-specific API directly (e.g. in test fixtures and in z3c.autoinclude).
Therefore a new zope.configuration syntax cannot be introduced outside zope.configuration without monkeypatching…
venusianconfiguration works by monkeypatching the processxmlfile method in zope.configuration’s ZCML-support to accept also Python files pass those to venusianconfiguration to process.
To support z3c.autoinclude, venusianconfiguration also monkeypatches z3c.autoincludes’s includePluginsDirective and includePluginsOveridesDirective (includeDependencies-directive is considered evil and is intentionally left unsupported).
So, three monkeypatches in total for zcml-free configuration.
[instance] recipe = plone.recipe.zope2instance ... eggs = ... venusianconfiguration zope-conf-additional = # Enable venuasianconfiguration monkeypatches %import venusianconfiguration
For more examples, look into the demo-package included in the sources.
Because the configuration now written in Python, your add-on must have its namespaces packages properly defined in its setup.py. E.g. add-on called my.product would have following namespace package definition:
setup( ... namespace_packages=['my'], ... )
Even there’s no ZCML, the add-on must be registered to be configured. This can be done by adding the usual z3c.autoinclude-entrypoint into add-on’s setup.py:
setup( ... entry_points=""" # -*- Entry points: -*- [z3c.autoinclude.plugin] target = plone """ )
An alternative would be to add the package into the zcml-option of your Plone instance’s buildout-part for plone.recipe.zope2instance:
[instance] recipe=plone.recipe.zope2instance ... zcml = my.product