Question

I have a fileset (which is returned from the Maven Ant task), and it contains all the jars I need to repack. This fileset is referenced by a refid. I only want to include our own jars, so I would like to filter that. But Ant filesets don’t support any further attributes or nested tags if a refid is used.

For example, if the fileset is:

org.foo.1.jar org.foo.2.jar log4j.jar 

and I want to have a fileset which contains only

org.foo*.jar 

How would I do that?

Answer 1

Try using a restrict resource collection, which you can use like a fileset in any task that uses resource collections to select the groups of files to operate on.

For example, for a fileset returned from your Maven task referenced via an id called dependency.fileset you can declare a restrict resource collection like so:

<restrict id='filtered.dependencies'>     <fileset refid='dependency.fileset'/>     <rsel:name name='org.foo*.jar'/> </restrict> 

Note you’ll have to declare the resource selector namespace as it isn’t part of the built-in Ant namespace:

<project xmlns:rsel='antlib:org.apache.tools.ant.types.resources.selectors'>     ... </project> 

From here you can reference your restrict resource collection in a similar fashion to how you would reference your fileset. For example, to create backups of your filtered set of files:

<copy todir='.'>     <restrict refid='filtered.dependencies'/>     <globmapper from='*' to='*.bak'/> </copy> 

Of course you can inline your restrict resource collection if you so desire:

<copy todir='.'>     <restrict>         <fileset refid='dependency.fileset'/>         <rsel:name name='org.foo*.jar'/>     </restrict>     <globmapper from='*' to='*.bak'/> </copy> 

Have a look at the Ant documentation on resource collections for further information.