src/eric7/eric7_shell.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Copyright (c) 2017 - 2024 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
eric Shell.

This is the main Python script that performs the necessary initialization
of the ShellWindow module and starts the Qt event loop.
"""

import argparse
import os
import sys

from PyQt6.QtGui import QGuiApplication

originalPathString = os.getenv("PATH")


def createArgparseNamespace():
    """
    Function to create an argument parser.

    @return created argument parser object
    @rtype argparse.ArgumentParser
    """
    from eric7.__version__ import Version

    # 1. create the argument parser
    parser = argparse.ArgumentParser(
        description="Stand alone variant of the eric interpreter shell."
        " It is part of the eric tool suite.",
        epilog="Copyright (c) 2017 - 2024 Detlev Offenbach <detlev@die-offenbachs.de>.",
    )

    # 2. add the arguments
    parser.add_argument(
        "-V",
        "--version",
        action="version",
        version="%(prog)s {0}".format(Version),
        help="show version information and exit",
    )
    parser.add_argument(
        "--config",
        metavar="config_dir",
        help="use the given directory as the one containing the config files",
    )
    parser.add_argument(
        "--settings",
        metavar="settings_dir",
        help="use the given directory to store the settings files",
    )

    # 3. create the Namespace object by parsing the command line
    args = parser.parse_args()
    return args


args = createArgparseNamespace()
if args.config:
    from eric7 import EricUtilities

    EricUtilities.setConfigDir(args.config)
if args.settings:
    from PyQt6.QtCore import QSettings

    SettingsDir = os.path.expanduser(args.settings)
    if not os.path.isdir(SettingsDir):
        os.makedirs(SettingsDir)
    QSettings.setPath(
        QSettings.Format.IniFormat, QSettings.Scope.UserScope, SettingsDir
    )

from eric7.Toolbox import Startup


def createMainWidget(_args):
    """
    Function to create the main widget.

    @param _args namespace object containing the parsed command line parameters
        (unused)
    @type argparse.Namespace
    @return reference to the main widget
    @rtype QWidget
    """
    from eric7.QScintilla.ShellWindow import ShellWindow

    return ShellWindow(originalPathString)


def main():
    """
    Main entry point into the application.
    """
    QGuiApplication.setDesktopFileName("eric7_shell")

    res = Startup.appStartup(args, createMainWidget)
    sys.exit(res)


if __name__ == "__main__":
    main()