I want a macro to expand to an attribute or not depending on whether the
value is an empty string or not. Suppose I have the following script:
<?xml version="1.0"?>
<!DOCTYPE project []>
<project name="foo" default="foo">
<macrodef name="foomac">
<attribute name="attr"/>
<sequential>
<echo @{attr}>Running macro</echo>
</sequential>
</macrodef>
<target name="foo">
<foomac attr="file="bar""/>
</target>
</project>
I want to optionally include an attribute to the <echo> element if the
parameter is given as the non-empty string (I'm not really doing this
with <echo>. This is an example).
Any other way to do this? Macros seem great for optionally including
elements and parts of strings but not so great for attributes.
