Something like the following inserted into the documentation in the section
where you already speak about targets and if/unless would have been very
helpful to me in using Ant.
===========
Sometimes there is a need to perform conditional processing based on a
property which can take multiple values. The pattern to use when dealing
with this circumstance is to create a new property, the name of which is
created from the value of the original property. An example of this is
shown below. In this example we have a property "X" which can have the
values "A" or "B". We will create a new property named "X.A" or "X.B"
depending on the value of "X". We can then create our targets using the if
attribute and the various new properties.
<target ...>
<property name="X.${X}" value="true"/>
</target>
<target ... if="X.A" ...>
...
</target>
<target ... if="X.B" ...>
...
</target>
=========
Feel free to improve upon this as needed, but I think it'll help the next
new person if something like this gets added to the docs.
Cheers
Jay Walters
