Try the "isset" task of the <condition> task. It can be used with the <if> task
<if>
<isset property="myprop"/>
<then>
<echo
message="Property "myprop" is set and is equal
to ${myprop}"/>
</then>
<else>
<echo message="Property "myprop" isn't set"/>
</else>
</if>
You could also use equals:
<if>
<equals arg1="${myprop}" arg2=""/>
<then>
[...]
The <if> task is part of antcontrib at
http://ant-contrib.sourceforge.net/. Otherwise, look at the
<condition> task. The <condition> task allows you to set a property if
a particular condition is met and that includes both the <isset> and
<equals> parameters. You can then combine this with <antcall> and
targets with conditions:
<condition property="myprop.flag">
<isset property="myprop"/>
</condition>
<antcall target="myprop.isset"/>
<antcall target="myprop.notset"/>
<target name="myprop.isset" if="myprop.isset"/>
<target name="myprop.notset" unless="myprop.isset"/>
Yes, in this particular instance, you can simply test the property
directly in the tasks, but this does show you how you can set a
property on the <condition> task, then use that as an if/else
statement without using the antcontrib tasks.
On 9/17/07, warhero <[EMAIL PROTECTED]> wrote:
>
> I'm having trouble trying to figure out how to make sure a property is not
> empty.
>
> So I have a properties file like so
> myprop=something.
>
> And if the myprop is not empty (myprop=) then execute something. Does that
> make sense? here's some kind of pseudocode.
>
> <if myprop != ''>
> <exec whatever>
> </if>
>
> Just some pseudo code, but get's the point across..
>
> Thanks in advance.
> --
> View this message in context:
> http://www.nabble.com/ANT---AntXtras-quick-question.-tf4470947.html#a12747996
> Sent from the Ant - Users mailing list archive at Nabble.com.
>
>
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--
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David Weintraub
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