run

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import absolute_import, division, print_function, unicode_literals

import os
import sys

basedir = os.path.dirname(os.path.realpath(__file__))

old = os.path.join(basedir, "octoprint")
if os.path.exists(old):
    # rename left-overs from old file structure
    print(
        """
Found left-overs from old file structure, renaming to
"octoprint.backup". Please remove this manually (I don't
dare to do so myself since you might have changes in there
I don't know anything about).
"""
    )
    os.rename(old, os.path.join(basedir, "octoprint.backup"))

sys.path.insert(0, os.path.join(basedir, "src"))

import octoprint  # noqa: E402

if len(sys.argv) == 1:
    sys.argv.append("serve")
octoprint.main()