Re: Having problem using property to in macrodef if invoke for more than one time

[Olivier Gies]

I recommend using the <var ..> task from ant-contrib. You can se it to 
unset properties in macrodefs, like this:

<var name="myvalue" unset="true" />
BR,
Olivier

-------- Original Message  --------
Subject: Having problem using property to in macrodef if invoke for more 
than one time
From: CheeYang Chau <[EMAIL PROTECTED]>
To: user@ant.apache.org
Date: 27/03/2008 13:52

Hi,

I love the macrodef task. However, it has a weakness.  We must be very
careful if using property within the macrodef.  I face problem with a
macrodef that is more complicated than the following example.  I have
to use dirname and condition in my macrodef, but it cause problem if I
invoke macrodef for more than one time as the property has been set
for the first time.  Here is an example that trying to replay the
situation I face:

        <macrodef name="a">             
                <attribute name="module"/>
                <sequential>                                              
                        <property name="myvalue" value="@{module}"/>
                        <echo>${myvalue}</echo>
                </sequential>
        </macrodef>
        
        <target name="build">
                <a module="venus"/>
                <a module="mars"/>
        </target>

I expect the output should be

[echo] venus
[echo] mars

but it turn out:

[echo] venus
[echo] venus

I think this is a common issue using macrodef and there are some
temporary solution to pass a temporary property name to the macrodef.
This is not feasible in my situation as I need to pass more than 5 to
10 properties to my macrodef.

Some other solution is using local property but I couldn't find this
task.  I am using ANT 1.7.0.

Any solution?  Please advice.  Thank you very much.


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*Olivier Gies*

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