How can I get ant behavior when expanding properties with gradle? -

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I have an ant project which I am converting to gradle. In the ant project, there is something like this: 

  & copy; Copy todir = "dest_dir" & gt; & Lt; Fileset & gt; ... & lt; / Fileset & gt; & Lt; Filterchain & gt; & Lt; Expandproperties / & gt; & Lt; / Filterchain & gt; & Lt; / Copy & gt;   
 Extends the filter chain properties like  $ {property} , but ignoring the dollar signs without brakes I try to replicate this behavior in gradle I am doing  
 If I have  expanded , then gradle spreads files as a Groovy template, which tries to expand the dollar sign with braces. / P> 
  Copy 'source_dir' to 'dest_dir' (project.properties)}   
 If I type with  filter  ant < Code> ExpandProperties  Filter class, I get a NullPointerException. Is there an easy way to do this?   
 
 
 Okay, I understood that the ExpandProperties filter needs to set its project property with ant project is. In this way I have been configured to work it:  
  Copy 'source_dir' to 'dest_dir' filter (org.apache.tools.ant.filters.ExpandProperties, project: ant .antProject)}   
 This property, such as  $ {property}  spreads in the same way as ant, slipping on dollar signs without brakes .

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