ANT - Conditional execution of macro within target - ant

Question

I'm attempting to implement what I believe should be pretty basic conditioning but am not having any success. I have a target (deploy.DEVELOPMENT) and within this target I call two macros that backup/restore an ini file we using for configuration. The outline is this:
<target name="deploy.DEVELOPMENT" description="Deploy to DEVELOPMENT">
<echo>START: Deploy to ${mode.dev}</echo>
<echo>SOURCE: ${dir.source}</echo>
<macroBackupSourceConfigFile />
<macroUpdateConfigFile
keyDatasource="${setting.devdsn}"
keyServer="${server.devdevweb11}"
keyAppName="${setting.devappname}"
keyApplicationID="${setting.applicationid}"/>
<macroCopyFiles dirSource="${dir.source}" dirTarget="${dir.devdevweb11}"/>
<macroRestoreSourceConfigFile />
<echo>END: Deploy to ${mode.dev}</echo>
</target>
In certain projects an ini file is not required, therefore I would not need to run either of the two macros, just the macroCopyFiles would run. I'd like to just set a property at the top of my ant file to specify whether these macros should be executed.
Any assistance would be greatly appreciated.
Best Regards,
Gary

Answer 1

I think this is what you need... It will perform a check. If file abc.txt is available, abc.present property will exist. Other target will call check-abc and check wether the property abc.present exists. If so, it will execute, else it will not.
<target name="check-abc">
<available file="abc.txt" property="abc.present"/>
</target>
<target name="do-if-abc" depends="check-abc" if="abc.present">
...
</target>