Environment Management

def create_environment(env_dir, args):
    """
    Create a new Node.js virtual environment.
    
    Parameters:
    env_dir (str): Target directory for the environment
    args (argparse.Namespace): Parsed command-line arguments
    
    Creates directory structure, installs Node.js and npm if requested,
    sets up activation scripts for multiple shells, and configures
    the environment for isolated Node.js development.
    
    The created environment includes:
    - Node.js installation (version specified in args)
    - npm installation (if --with-npm specified)
    - Shell activation scripts (bash, zsh, fish, PowerShell, cmd)
    - Environment configuration and PATH management
    - Integration with Python virtualenv (if detected)
    """

def get_env_dir(args):
    """
    Determine environment directory path from arguments.
    
    Parameters:
    args (argparse.Namespace): Parsed command-line arguments
    
    Returns:
    str: Absolute path to environment directory
    
    Handles various scenarios:
    - Explicit environment path specification
    - Default environment naming
    - Integration with existing Python virtualenv
    - Current working directory considerations
    """

def install_activate(env_dir, args):
    """
    Install activation scripts for the Node.js environment.
    
    Parameters:
    env_dir (str): Environment directory path
    args (argparse.Namespace): Configuration arguments
    
    Creates activation scripts for multiple shells:
    - activate (bash/zsh)
    - activate.bat (Windows cmd)
    - activate.ps1 (PowerShell)
    - activate.fish (fish shell)
    
    Also creates corresponding deactivation functionality and
    configures environment variables for Node.js and npm.
    """

def set_predeactivate_hook(env_dir):
    """
    Set up pre-deactivation hook for environment cleanup.
    
    Parameters:
    env_dir (str): Environment directory path
    
    Creates a hook script that runs before environment deactivation
    to perform necessary cleanup operations and restore the previous
    environment state properly.
    """

import nodeenv
from argparse import Namespace

# Create environment with default settings
args = Namespace(
    node='latest',
    with_npm=True,
    jobs='2',
    without_ssl=False,
    source=False,
    requirements=None
)

nodeenv.create_environment('/path/to/myenv', args)

import nodeenv
from argparse import Namespace

# Create environment with specific Node.js version and build options
args = Namespace(
    node='16.20.0',
    with_npm=True,
    jobs='4',
    without_ssl=False,
    source=True,  # Build from source
    requirements='/path/to/requirements.txt',
    mirror='https://npm.taobao.org/mirrors/node'
)

nodeenv.create_environment('/path/to/custom-env', args)