53 lines
1.6 KiB
Python
53 lines
1.6 KiB
Python
# -*- coding: iso-8859-1 -*-
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"""
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Function to check for updates.
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"""
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import os
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import dosagelib
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from dosagelib import configuration
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from .util import urlopen
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from distutils.version import StrictVersion
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import requests
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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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session = requests.session()
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page = urlopen(UPDATE_URL, session).json()
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version, url = None, None
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version = page['tag_name']
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if os.name == 'nt':
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url = next((x['browser_download_url'] for x in page['assets'] if x['content_type'] == 'application/x-msdos-program'), configuration.Url)
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else:
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url = page['tarball_url']
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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 StrictVersion(version) > StrictVersion(dosagelib.__version__)
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