def get_file_list(self):
        """Figure out the list of files to include in the source
        distribution, and put it in 'self.filelist'.  This might involve
        reading the manifest template (and writing the manifest), or just
        reading the manifest, or just using the default file set -- it all
        depends on the user's options.
        """
        # new behavior when using a template:
        # the file list is recalculated every time because
        # even if MANIFEST.in or setup.py are not changed
        # the user might have added some files in the tree that
        # need to be included.
        #
        #  This makes --force the default and only behavior with templates.
        template_exists = os.path.isfile(self.template)
        if not template_exists and self._manifest_is_not_generated():
            self.read_manifest()
            self.filelist.sort()
            self.filelist.remove_duplicates()
            return

        if not template_exists:
            self.warn(
                ("manifest template '%s' does not exist " + "(using default file list)")
                % self.template
            )
        self.filelist.findall()

        if self.use_defaults:
            self.add_defaults()

        if template_exists:
            self.read_template()

        if self.prune:
            self.prune_file_list()

        self.filelist.sort()
        self.filelist.remove_duplicates()
        self.write_manifest()
Figure out the list of files to include in the source
        distribution, and put it in 'self.filelist'.  This might involve
        reading the manifest template (and writing the manifest), or just
        reading the manifest, or just using the default file set -- it all
        depends on the user's options.
        
product/gradle-plugin/src/main/python/setuptools/_distutils/command/sdist.py