[ANT] [xmltask] update an attribute value using wildcards

I would have thought that if you didn't provide a destination, xmltask would modify the source file and replace it, but apparently that's not the case since the below code does not work:

<xmltask source="**\plugin.xml"> 
 <attr path="plugin" attr="version" value="12345" /> 
</xmltask>

If I specify a destination, I get an error saying "Multiple inputs, but only one destination":

<xmltask source="**\plugin.xml" dest="**\plugin.xml"> 
 <attr path="plugin" attr="version" value="12345" /> 
</xmltask>

How can I get this to work with wildcards? Is it possible?

From stackoverflow

• Instead of specifying a single output file with dest, specify an output directory with todir:

  <xmltask source="**\plugin.xml" todir="output"> 
     <attr path="plugin" attr="version" value="12345" /> 
  </xmltask>
  

• if I add the 'todir' attribute, xmltask will preserve the file name, but will output all the files to that one location, which is not what I want.

  Is there some way to have xmltask just modify an xml file in place without having to change its location? If xmltask must re-write the file, is there some way to synch the 'todir' attribute with the directory of the source file so it just writes it to the same location?

  Brian Agnew : If you specify the source and destination to be the same, it will read/write to the same file reliably.