Add empty directory to zip while packaging

[Antoine Toulme]

While packaging my application, I need to add an entry to the zip
representing an empty folder.
Ideally I would want to create that new folder on the fly, so I did this:

package(:zip).tap do |zipfile|
    mkdir_p(_("target/tmpdir"))
    zipfile.include(_("target/tmpdir"), :as => 'logs')
    [...]
end

However the logs folder is missing from the resulting archive.

I attach to this email a buildfile to reproduce the issue, just run:
buildr package
then try unpacking the resulting zip, you'll see it is empty.

I use buildr 1.3.4.

Let me know if I should write up a bug, I'll be happy to do that.

Thanks,

Antoine