complex_bash_crenv.sh

#!/bin/bash
# === macOS/Linux Script ===

# Check if the virtual environment exists
if [ ! -d "venv" ]; then
    echo "Creating virtual environment in the current directory..."
    python3 -m venv venv
    if [ $? -ne 0 ]; then
        echo "Failed to create virtual environment."
        exit 1
    fi
else
    echo "Virtual environment already exists."
fi

# Activate the virtual environment
source ./venv/bin/activate

# Optional: Keep the shell open (only useful if run from a terminal emulator directly)
$SHELL

complex_crenv.bat

@echo off
REM === Windows Script ===

REM Check if the virtual environment exists
if not exist "venv" (
    echo Creating virtual environment in the current directory...
    python -m venv venv
    if errorlevel 1 (
        echo Failed to create virtual environment.
        exit /b 1
    )
) else (
    echo Virtual environment already exists.
)

REM Activate the virtual environment
call .\venv\Scripts\activate.bat

REM Keep shell open after activation
cmd /K

crenv.bat

@echo off
REM Check if the current directory has a venv folder
if not exist "venv" (
    echo Creating virtual environment in the current directory...
    python -m venv venv
    call .\venv\Scripts\activate.bat
) else (
    echo Virtual environment already exists.
    call .\venv\Scripts\activate.bat
)

REM Keep the shell open after activation
cmd /K ".\venv\Scripts\activate.bat"

crenv.py

import os, sys, subprocess, platform

venv_dir = "venv"

def create_venv():
    if not os.path.isdir(venv_dir):
        print("Creating virtual environment...")
        subprocess.check_call([sys.executable, "-m", "venv", venv_dir])
    else:
        print("Virtual environment already exists.")

def activate_venv():
    system = platform.system()
    if system == "Windows":
        activate_script = os.path.join(venv_dir, "Scripts", "activate.bat")
        subprocess.call(["cmd.exe", "/K", activate_script])
    else:
        activate_script = os.path.join(venv_dir, "bin", "activate")
        subprocess.call([os.environ.get("SHELL", "/bin/bash"), "-i", "-c", f"source {activate_script} && exec $SHELL"])

if __name__ == "__main__":
    try:
        create_venv()
        activate_venv()
    except Exception as e:
        print(f"Error: {e}")
        sys.exit(1)