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