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# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
# Copyright 2014-2021 Florian Bruhin (The-Compiler) <mail@qutebrowser.org>
#
# This file is part of qutebrowser.
#
# qutebrowser is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# qutebrowser is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with qutebrowser. If not, see <https://www.gnu.org/licenses/>.
"""Check if qutebrowser is run with the correct python version.
This should import and run fine with both python2 and python3.
"""
import sys
try:
# Python3
from tkinter import Tk, messagebox
except ImportError: # pragma: no cover
try:
# Python2
from Tkinter import Tk # type: ignore[import, no-redef]
import tkMessageBox as messagebox # type: ignore[import, no-redef] # noqa: N813
except ImportError:
# Some Python without Tk
Tk = None # type: ignore[misc, assignment]
messagebox = None # type: ignore[assignment]
# First we check the version of Python. This code should run fine with python2
# and python3. We don't have Qt available here yet, so we just print an error
# to stderr.
def check_python_version():
"""Check if correct python version is run."""
if sys.hexversion < 0x03060100:
# We don't use .format() and print_function here just in case someone
# still has < 2.6 installed.
version_str = '.'.join(map(str, sys.version_info[:3]))
text = ("At least Python 3.6.1 is required to run qutebrowser, but " +
"it's running with " + version_str + ".\n")
if Tk and '--no-err-windows' not in sys.argv: # pragma: no cover
root = Tk()
root.withdraw()
messagebox.showerror("qutebrowser: Fatal error!", text)
else:
sys.stderr.write(text)
sys.stderr.flush()
sys.exit(1)
if __name__ == '__main__':
check_python_version()
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