[Zope3-dev] Re: yagni on overrides?

[Jim Fulton]

On Apr 27, 2007, at 10:15 AM, Martijn Faassen wrote:

> Tres Seaver wrote:
> [snip]
>> One example of such an implementation would be an optional, lxml- 
>> based
>> directive which uses the native structure of the ZCML file and XPath.
>> E.g. to include only adapters from a package ::
>>   <select package="my.package" file="configure.zcml">
>>    <path>//adapter//path>
>>   </select>
>> The XPath processor would need to be passed the current namespace
>> mapping here, if we want to select items from the non-default  
>> namespace.
>> Otherwise, this would function pretty much like the 'include'  
>> directive
>> (it might even use that diretive's handler under the hood).
>> With an egg-based story, we can more easily use stuff which  
>> depends on a
>> third-party library like lxml;  folks who can't install lxml just  
>> lose
>> this feature.
>
> In general, I don't like relying on the syntactic structure of ZCML  
> files for this. I'd prefer to have a semantic of configuration  
> actions and a way to disable them.
>
> If this can be a quick fix that helps people, so be it, but I think  
> a way to manipulate configuration actions from Python code is a  
> better overall approach.

I agree.

Jim

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