cvs.py

#!/usr/bin/env python3
"""
Entry point for CVS
"""

import sys
import argparse


def create_main_parser() -> argparse.ArgumentParser:
    """Create the main argument parser for interface selection"""
    parser = argparse.ArgumentParser(
        prog="cvs", description="A version control system with CLI and GUI interfaces"
    )

    parser.add_argument(
        "--gui",
        action="store_true",
        help="Launch the graphical user interface (other args ignored)",
    )

    parser.add_argument(
        "--cli", action="store_true", help="Use command line interface (default)"
    )

    return parser


def launch_gui():
    """Launch the GUI interface"""
    try:
        from gui.application import main as gui_main

        print("Launching CVS GUI...")
        gui_main()
    except ImportError as e:
        print(f"Error: Could not import GUI components: {e}")
        print("Make sure all required dependencies are installed")
        sys.exit(1)
    except Exception as e:
        print(f"Error launching GUI: {e}")
        sys.exit(1)


def launch_cli(remaining):
    """Launch the CLI interface (pass remaining args to cli)"""
    try:
        original_argv = sys.argv
        sys.argv = ["cvs"] + remaining

        from cli import main as cli_main

        cli_main()

    except SystemExit as e:
        if e.code != 0:
            sys.exit(e.code)
    except ImportError as e:
        print(f"Error: Could not import CLI components: {e}")
        sys.exit(1)
    except Exception as e:
        print(f"Error launching CLI: {e}")
        sys.exit(1)
    finally:
        sys.argv = original_argv


def main():
    """Main entry point for CVS application"""
    parser = create_main_parser()
    args, remaining = parser.parse_known_args()

    if args.gui:
        launch_gui()
    else:
        launch_cli(remaining)


if __name__ == "__main__":
    main()