Gert Driesen wrote:
> ...
>>>
>> What's the issue with this? This problem comes up often enough. The
>> intuitive sense of the if and unless attributes is that they should
>> always be evaluated first, and if the result is to skip the task, then
>> absolutely nothing else should happen - no other property evaluations,
>> no validity checks on other attribute values, etc.
> ...
>
> Consider this following (incomplete) build fragment:
>
> <project default="build">
> <property name="include.text" value="false" />
>
> <fileset id="files">
> <include name="*.txt" if="${incliude.text}">
> </fileset>
>
> <target name="build">
> <property name="include.text" value="true" />
> <copy ....>
> <fileset refid="files" />
> </copy>
> </target>
> </project>
>
> If we chose to ignore elements based on the if/unless attribute during
> initialization, then the <include> element of the fileset will not be
> initialized. NAnt will first initialize global types/tasks, and at
> that moment "include.text" is false.
This sounds like a case for dynamic filesets, just like the distinction
between dynamic and regular properties. Of course, that's much easier
said than done.
Gary
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