Keeping the private stuff out of ANT config files

username.xml

<input message="Please enter svn username:" addproperty="svn.username" defaultvalue="" />  
<input message="Please enter svn password:" addproperty="svn.password" defaultvalue="" />    
<!-- update working copy to make sure -->  
<echo message="updating working copy at ${svn.wc}" />    
<svn username="${svn.username}" password="${svn.password}">        
   <update dir="${svn.wc}"/>    
</svn>