manage_gunicorn.py

# -*- coding: utf-8 -*-

import os
import sys

from flask.ext.script import Command, Option


class GunicornServer(Command):
    """Run the app within Gunicorn"""

    def get_options(self):
        from gunicorn.config import make_settings

        settings = make_settings()
        options = (
            Option(*klass.cli, action=klass.action)
            for setting, klass in settings.iteritems() if klass.cli
        )
        return options

    def run(self, *args, **kwargs):
        run_args = sys.argv[2:]
        run_args.append('manage:app')
        os.execvp('gunicorn', [''] + run_args)

This is not working in gunicorn==19.7.1. In line 12, klass.action, because of the settings gunicorn.config.Sendfile is using store_const which has an extra argument const. Sometimes does not work because of that.

The last line of traceback is

  File "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/argparse.py", line 1334, in add_argument
    action = action_class(**kwargs)
TypeError: __init__() missing 1 required positional argument: 'const'

Please check out my gist for a working manage.py in gunicorn==19.7.1.