How to use the py2app.util.copy_resource function in py2app

try:
                copy_resource(src, dest, dry_run=self.dry_run, symlink=1)
            except:
                import traceback
                traceback.print_exc()
                raise

        plugindir = os.path.join(appdir, 'Contents', 'Library')
        for src, dest in self.iter_extra_plugins():
            dest = os.path.join(plugindir, dest)
            if src == dest:
                continue

            makedirs(os.path.dirname(dest))
            try:
                copy_resource(src, dest, dry_run=self.dry_run)
            except:
                import traceback
                traceback.print_exc()
                raise

        # symlink frameworks
        for src in self.iter_frameworks():
            dest = os.path.join(
                appdir, 'Contents', 'Frameworks', os.path.basename(src))
            if src == dest:
                continue
            makedirs(os.path.dirname(dest))
            self.symlink(os.path.abspath(src), dest)

        self.compile_datamodels(resdir)
        self.compile_mappingmodels(resdir)

else:
            self.symlink('../../site.pyc', os.path.join(pyhome, 'site.pyc'))
        self.symlink(
            os.path.join(realhome, 'config'),
            os.path.join(pyhome, 'config'))


        # symlink data files
        # XXX: fixme: need to integrate automatic data conversion
        for src, dest in self.iter_data_files():
            dest = os.path.join(resdir, dest)
            if src == dest:
                continue
            makedirs(os.path.dirname(dest))
            try:
                copy_resource(src, dest, dry_run=self.dry_run, symlink=1)
            except:
                import traceback
                traceback.print_exc()
                raise

        plugindir = os.path.join(appdir, 'Contents', 'Library')
        for src, dest in self.iter_extra_plugins():
            dest = os.path.join(plugindir, dest)
            if src == dest:
                continue

            makedirs(os.path.dirname(dest))
            try:
                copy_resource(src, dest, dry_run=self.dry_run)
            except:
                import traceback

#        here (see issue 101)

        for copyext in copyexts:
            fn = os.path.join(ext_dir,
                (copyext.identifier.replace('.', os.sep) +
                os.path.splitext(copyext.filename)[1])
            )
            self.mkpath(os.path.dirname(fn))
            copy_file(copyext.filename, fn, dry_run=self.dry_run)

        for src, dest in self.iter_data_files():
            dest = os.path.join(resdir, dest)
            if src == dest:
                continue
            makedirs(os.path.dirname(dest))
            copy_resource(src, dest, dry_run=self.dry_run)

        plugindir = os.path.join(appdir, 'Contents', 'Library')
        for src, dest in self.iter_extra_plugins():
            dest = os.path.join(plugindir, dest)
            if src == dest:
                continue

            makedirs(os.path.dirname(dest))
            copy_resource(src, dest, dry_run=self.dry_run)


        target.appdir = appdir
        return appdir

for src, dest in self.iter_data_files():
            dest = os.path.join(resdir, dest)
            if src == dest:
                continue
            makedirs(os.path.dirname(dest))
            copy_resource(src, dest, dry_run=self.dry_run)

        plugindir = os.path.join(appdir, 'Contents', 'Library')
        for src, dest in self.iter_extra_plugins():
            dest = os.path.join(plugindir, dest)
            if src == dest:
                continue

            makedirs(os.path.dirname(dest))
            copy_resource(src, dest, dry_run=self.dry_run)


        target.appdir = appdir
        return appdir