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Copying files from one JAR to another using ANT

To avoid needless duplication of source files in two different repositories, I would like to write an Ant build.xml file that copies files from one .jar file to another. I don’t want to copy everything in the source jar, just certain selected files.

Now I could certainly use the unjar task to extract everything from the jar into a temporary directory, then use a copy task to copy the files to the directory from which the new jar will be built, then use a delete task to remove the temporary directory. However is there anything simpler?

In particular, is there a way to treat a jar (or, for that matter, a zip or a tar) as a directory tree from which files can be copied without making temporary copies first? For instance, could I set the src attribute of the copydir element to a jar file instead of an actual directory?

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This entry was posted on Friday, July 7th, 2006 at 9:29 AM and is filed under Java. You can follow any responses to this entry through the Atom feed. You can make a comment, Digg this story, or trackback from your own site.

4 Responses to “Copying files from one JAR to another using ANT”

  1. Mik Says:
    July 7th, 2006 at 10:03 AM

    (http://ant.apache.org/manual/CoreTypes/zipfileset.html) is your friend!

  2. Todd Gayley Says:
    July 7th, 2006 at 12:18 PM

    Use (http://ant.apache.org/manual/CoreTypes/zipfileset.html).

  3. Alexandre Rafalovitch Says:
    July 7th, 2006 at 2:00 PM

    Is anything wrong with ZipFileSet for your needs? (http://ant.apache.org/manual/CoreTypes/zipfileset.html)

    If that does not work out, maybe a FileSet adapter can be created on top of the TrueZip library: https://truezip.dev.java.net/

  4. Carey Evans Says:
    July 7th, 2006 at 10:24 PM

    I think you’re looking for the zipfileset element on the zip task, and presumably also jar.

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