[Zope3-dev] RFC: zcml:condition

[Roger Ineichen]

Hi Jim
> -----Original Message-----
> From: zope3-dev-bounces+dev=projekt01.ch at zope.org 
> [mailto:zope3-dev-bounces+dev=projekt01.ch at zope.org] On 
> Behalf Of Jim Fulton
> Sent: Thursday, February 17, 2005 10:42 PM
> To: zope3-dev at zope.org
> Subject: [Zope3-dev] RFC: zcml:condition
> 
> 
> We've identified a real need for conditional ZCML
> processing.
> 
> Consider an optional feature, like onlinehelp or zsync.
> These system define directives or components that individual
> packages will want to provide if these systems are available.
> 
> For example, a package might want to register on-line-help
> documents if the on-line help system is available:
> 
> <configure
>      xmlns="http://namespaces.zope.org/zope"
>      xmlns:help="http://namespaces.zope.org/help"
>      zcml:condition="have onlinehelp"
>      >
> 
>    <help:register
>        id="zope.app.authentication"
>        parent="dev"
>        title="Authentication"
>        doc_path="README.txt"
>        class="zope.app.onlinehelp.onlinehelptopic.RESTOnlineHelpTopic"
>        />
> 
>    <help:register
>        id="principalfolder"
>        parent="dev/zope.app.authentication"
>        title="Principal Folder"
>        doc_path="principalfolder.txt"
>        class="zope.app.onlinehelp.onlinehelptopic.RESTOnlineHelpTopic"
>        />
> 
>    <help:register
>        id="groupfolder"
>        parent="dev/zope.app.authentication"
>        title="Group Folder"
>        doc_path="groupfolder.txt"
>        class="zope.app.onlinehelp.onlinehelptopic.RESTOnlineHelpTopic"
>        />
> 
> </configure>

Can we use this condition like a sub configure directive:

<configure
     xmlns="http://namespaces.zope.org/zope">

  <browser:page
     name="foo"
     template="foo.pt"
     ...
     />

  <configure
     xmlns:help="http://namespaces.zope.org/help"
     zcml:condition="have onlinehelp"
     >

   <help:register
       id="zope.app.authentication"
       parent="dev"
       title="Authentication"
       doc_path="README.txt"
       class="zope.app.onlinehelp.onlinehelptopic.RESTOnlineHelpTopic"
       />

   <help:register
       id="principalfolder"
       parent="dev/zope.app.authentication"
       title="Principal Folder"
       doc_path="principalfolder.txt"
       class="zope.app.onlinehelp.onlinehelptopic.RESTOnlineHelpTopic"
       />
  </configure>

</configure>

Or what's the scope of the zcml:condition.

[...]

Regards
Roger Ineichen

Projekt01 GmbH
www.projekt01.ch
_____________________________
END OF MESSAGE  

> Jim
> 
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> Jim Fulton           mailto:jim at zope.com       Python Powered!
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