dosage/dosagelib/updater.py

59 lines
1.8 KiB
Python
Raw Normal View History

2017-05-14 22:54:02 +00:00
# -*- coding: utf-8 -*-
# Copyright (C) 2004-2008 Tristan Seligmann and Jonathan Jacobs
# Copyright (C) 2012-2014 Bastian Kleineidam
# Copyright (C) 2015-2019 Tobias Gruetzmacher
2017-05-14 22:54:02 +00:00
from __future__ import absolute_import, division, print_function
2013-04-08 18:17:02 +00:00
import os
from distutils.version import StrictVersion
import dosagelib
from dosagelib import configuration
from . import http
2013-04-08 18:17:02 +00:00
UPDATE_URL = "https://api.github.com/repos/webcomics/dosage/releases/latest"
2013-04-08 18:17:02 +00:00
2017-05-14 22:54:02 +00:00
def check_update():
2013-04-08 18:17:02 +00:00
"""Return the following values:
(False, errmsg) - online version could not be determined
(True, None) - user has newest version
(True, (version, url string)) - update available
(True, (version, None)) - current version is newer than online version
"""
version, value = get_online_version()
if version is None:
# value is an error message
return False, value
if version == dosagelib.__version__:
2013-04-08 18:17:02 +00:00
# user has newest version
return True, None
if is_newer_version(version):
# value is an URL linking to the update package
return True, (version, value)
# user is running a local or development version
return True, (version, None)
2017-05-14 22:54:02 +00:00
def get_online_version():
2013-04-08 18:17:02 +00:00
"""Download update info and parse it."""
page = http.default_session.get(UPDATE_URL).json()
2013-04-08 18:17:02 +00:00
version, url = None, None
version = page['tag_name']
if os.name == 'nt':
url = next((x['browser_download_url'] for x in page['assets'] if
x['content_type'] == 'application/x-msdos-program'),
configuration.Url)
else:
url = page['tarball_url']
2013-04-08 18:17:02 +00:00
return version, url
2017-05-14 22:54:02 +00:00
def is_newer_version(version):
2013-04-08 18:17:02 +00:00
"""Check if given version is newer than current version."""
return StrictVersion(version) > StrictVersion(dosagelib.__version__)