64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
import json
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import logging
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import os
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import sys
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import threading
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from urllib.request import urlopen, Request
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from urllib.error import URLError
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logger = logging.getLogger('breezy_ui')
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GITHUB_RELEASES_URL = 'https://api.github.com/repos/wheaney/breezy-desktop/releases/latest'
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def _is_user_local_install():
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"""Return True if the app is running from a user-local installation.
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Scripted installs put the binary under the user's home directory (e.g.
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~/.local/bin/breezydesktop). System-wide package manager installs (e.g.
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AUR) put the binary in a system path like /usr/bin and don't need a
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version-update prompt because the package manager handles updates.
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"""
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home = os.path.expanduser('~')
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script_path = os.path.realpath(sys.argv[0])
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return script_path.startswith(home + os.sep)
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def _parse_version(version_str):
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"""Parse a version string like '2.8.10' or 'v2.8.9' into a tuple of ints."""
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v = version_str.strip().lstrip('v')
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try:
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return tuple(int(x) for x in v.split('.'))
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except (ValueError, AttributeError):
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return None
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def check_for_update(current_version, callback):
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"""
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Asynchronously check for a newer version on GitHub.
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Calls callback(latest_version_str) on the calling thread's GLib main loop
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if a newer version is found, or callback(None) if no update is available
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or if the check fails. Does nothing (no callback) when not running from a
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user-local installation (e.g. installed via AUR).
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"""
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if not _is_user_local_install():
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return
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def _check():
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latest_version = None
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try:
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req = Request(GITHUB_RELEASES_URL, headers={'User-Agent': 'breezy-desktop-ui'})
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with urlopen(req, timeout=10) as response:
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data = json.loads(response.read().decode())
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latest_tag = data.get('tag_name', '')
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latest = _parse_version(latest_tag)
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current = _parse_version(current_version)
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if latest and current and latest > current:
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latest_version = latest_tag.lstrip('v')
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except (URLError, json.JSONDecodeError, ValueError, OSError) as e:
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logger.debug('Update check failed: %s', e)
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callback(latest_version)
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threading.Thread(target=_check, daemon=True).start()
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