Launching the Flex debugger from ant

Question

I use an ant target like this:
                <target name="launch">
                                <echo>LAUNCH</echo>
                                                <exec executable="${FLASHPLAYER_EXE}" errorproperty="trace.output">
                                                <arg line="'${DEPLOY_DIR}\SellersApp.swf'" />
                                </exec>
                </target>
to launch a swf in the debug flash player.
I would like to launch the Flex debugger and make use of break points etc.  I tried replacing FLASHPLAYER_EXE with the path to Flex, but that tried to launch a new instance of Flex.  I looked at the Ant manual but could not work out how to address the running instance of Flex that launched Ant.
I have been using the Builder configuration method used here:
http://www.rozengain.com/blog/2008/04/24/flex-builder-ant-build-debug-console-output/
But then I run into problems when I just try and run an Ant target independently - it insists on proceeding with the whole launch operation first.
I posted a variation on the question here: http://forums.adobe.com/thread/578171 but I think I named it poorly and put it in the wrong forum - so apologies for cross posting.

Answer 1

Unless Eclipse's debug/launch infrastructure is exposed to ant, I'm not sure how this is possible.
However, using the command line debugger - fdb - should be possible from ant.
Another developer has been trying to get this to work. You need to pass -unit to fdb and create a file called .fdbinit that has debugger commands in it.
-Anirudh