new_contents: """
  Add a new sync object to sync between a git repo and Dropbox Paper.
  """
  import os
  
  from paper_to_git.commands.base import BaseCommand
  from paper_to_git.models import Sync, PaperFolder
  
  
  __all__ = [
      'AddCommand',
      ]
  
  
  class AddCommand(BaseCommand):
      """Add a new sync object between paper and git.
      """
  
      name = 'add'
  
      def add(self, parser, command_parser):
          self.parser = parser
          command_parser.add_argument('--repo',
                                      help='The path to the git repo.')
          command_parser.add_argument('--path',
                                      help='The path inside the repo')
          command_parser.add_argument('--folder',
                                      help='The folder name in the Paper')
  
      def process(self, args):
          repo = os.path.abspath(args.repo)
          path = args.path
          for folder in PaperFolder.select():
              if folder.name.lower() == args.folder.lower():
                  paper_folder = folder
          Sync.create(repo=repo, path_in_repo=path, folder=paper_folder)
  
subject: Create add command to add new sync.