Configuration and Environment

# Show general help
pip help

# Show help for specific command
pip help install
pip help uninstall

# Generate completion script for bash
pip completion --bash

# Generate completion script for zsh  
pip completion --zsh

# Generate completion script for fish
pip completion --fish

# List all configuration
pip config list

# List configuration for specific scope
pip config --global list
pip config --user list  
pip config --site list

# Get specific configuration value
pip config get global.index-url
pip config get install.user

# Set configuration values
pip config set global.index-url https://pypi.org/simple/
pip config set install.user true
pip config set global.timeout 60

# Unset configuration values
pip config unset global.index-url
pip config unset install.user

# Edit configuration file directly
pip config edit --global
pip config edit --user
pip config edit --site

# Global configuration
# Unix: /etc/pip.conf
# Windows: C:\ProgramData\pip\pip.ini

# User configuration  
# Unix: ~/.config/pip/pip.conf or ~/.pip/pip.conf
# Windows: %APPDATA%\pip\pip.ini

# Site configuration
# Unix: $VIRTUAL_ENV/pip.conf
# Windows: %VIRTUAL_ENV%\pip.ini

# Index and repository configuration
export PIP_INDEX_URL=https://pypi.org/simple/
export PIP_EXTRA_INDEX_URL=https://test.pypi.org/simple/
export PIP_TRUSTED_HOST="pypi.org test.pypi.org"
export PIP_FIND_LINKS=/path/to/local/packages

# Installation behavior
export PIP_USER=1                    # User installation
export PIP_REQUIRE_VIRTUALENV=1     # Require virtual environment
export PIP_NO_DEPS=1               # Skip dependencies
export PIP_UPGRADE=1                # Always upgrade
export PIP_FORCE_REINSTALL=1       # Force reinstall

# Build and binary options
export PIP_NO_BINARY=":all:"        # Build from source
export PIP_ONLY_BINARY=":all:"      # Only use wheels
export PIP_PREFER_BINARY=1          # Prefer binary packages
export PIP_NO_BUILD_ISOLATION=1     # Disable build isolation

# Caching and storage
export PIP_NO_CACHE_DIR=1           # Disable cache
export PIP_CACHE_DIR=/path/to/cache # Custom cache directory

# Network and timeouts
export PIP_TIMEOUT=60               # Connection timeout
export PIP_RETRIES=3                # Retry attempts
export PIP_PROXY=http://proxy:8080  # HTTP proxy
export PIP_CERT=/path/to/cert.pem   # SSL certificate

# Output and logging
export PIP_QUIET=1                  # Minimal output
export PIP_VERBOSE=1                # Verbose output
export PIP_LOG_FILE=/path/to/pip.log # Log file
export PIP_NO_COLOR=1               # Disable colored output

# Global pip configuration file
[global]
index-url = https://pypi.org/simple/
extra-index-url = https://test.pypi.org/simple/
trusted-host = pypi.org
                test.pypi.org
timeout = 60
retries = 3

[install]
user = true
upgrade = true
find-links = /path/to/local/packages

[freeze]
exclude = pip
          setuptools
          wheel

[list]
format = columns

[wheel]
wheel-dir = /path/to/wheels

[hash]
algorithm = sha256

# Comprehensive environment inspection
pip inspect

# Debug information
pip debug

# Show pip version and location
pip --version

# Show configuration locations
pip config debug

# Show cache information
pip cache info

# List cached packages
pip cache list

# List cache for specific package
pip cache list package_name

# Remove all cached files
pip cache purge

# Remove cache for specific package
pip cache remove package_name

# Remove cache with pattern matching
pip cache remove "django*"

# Show cache directory
pip cache dir

# Custom cache directory
pip install --cache-dir /custom/cache package_name

# Disable cache for specific operation
pip install --no-cache-dir package_name

# Environment variable for cache directory
export PIP_CACHE_DIR=/custom/cache

# Show available versions
pip index versions package_name

# Show versions from all configured indexes
pip index versions --pre package_name

# Show versions with extra index
pip index --extra-index-url https://test.pypi.org/simple/ versions package_name

# Using netrc for authentication
# Create ~/.netrc (Unix) or ~/_netrc (Windows)
# machine pypi.org
# login username
# password token

# Using keyring for password storage
pip install keyring
keyring set https://pypi.org/simple/ username

# Basic authentication in URL
pip install --index-url https://username:password@private.pypi.org/simple/ package_name

# Token authentication
pip install --index-url https://token@private.pypi.org/simple/ package_name

# Client certificates
pip install --cert /path/to/client.pem --client-cert /path/to/client.key package_name

# Trusted hosts (disable SSL verification)
pip install --trusted-host private.pypi.org package_name

# HTTP proxy
pip install --proxy http://proxy.company.com:8080 package_name

# HTTPS proxy
pip install --proxy https://proxy.company.com:8080 package_name

# Proxy with authentication
pip install --proxy http://user:password@proxy.company.com:8080 package_name

# No proxy for specific hosts
export NO_PROXY="localhost,127.0.0.1,.company.com"

# System proxy detection
# Pip automatically detects system proxy settings

# Require virtual environment
pip config set global.require-virtualenv true
export PIP_REQUIRE_VIRTUALENV=1

# Detect virtual environment
python -c "import sys; print(hasattr(sys, 'real_prefix') or (hasattr(sys, 'base_prefix') and sys.base_prefix != sys.prefix))"

# Virtual environment specific configuration
# Located at $VIRTUAL_ENV/pip.conf (Unix) or %VIRTUAL_ENV%\pip.ini (Windows)

import subprocess
import sys
import os
from pathlib import Path

def get_config(key, scope='global'):
    """Get pip configuration value."""
    cmd = [sys.executable, '-m', 'pip', 'config', f'--{scope}', 'get', key]
    
    try:
        result = subprocess.run(cmd, capture_output=True, text=True, check=True)
        return result.stdout.strip()
    except subprocess.CalledProcessError:
        return None

def set_config(key, value, scope='global'):
    """Set pip configuration value."""
    cmd = [sys.executable, '-m', 'pip', 'config', f'--{scope}', 'set', key, value]
    
    try:
        subprocess.check_call(cmd)
        print(f"Set {scope} config {key} = {value}")
    except subprocess.CalledProcessError as e:
        print(f"Failed to set config: {e}")
        raise

def list_config(scope=None):
    """List pip configuration."""
    cmd = [sys.executable, '-m', 'pip', 'config']
    if scope:
        cmd.append(f'--{scope}')
    cmd.append('list')
    
    try:
        result = subprocess.run(cmd, capture_output=True, text=True, check=True)
        return result.stdout
    except subprocess.CalledProcessError as e:
        print(f"Failed to list config: {e}")
        return None

def get_cache_info():
    """Get pip cache information."""
    cmd = [sys.executable, '-m', 'pip', 'cache', 'info']
    
    try:
        result = subprocess.run(cmd, capture_output=True, text=True, check=True)
        return result.stdout
    except subprocess.CalledProcessError as e:
        print(f"Failed to get cache info: {e}")
        return None

def purge_cache():
    """Purge pip cache."""
    cmd = [sys.executable, '-m', 'pip', 'cache', 'purge']
    
    try:
        subprocess.check_call(cmd)
        print("Cache purged successfully")
    except subprocess.CalledProcessError as e:
        print(f"Failed to purge cache: {e}")
        raise

def setup_environment_config():
    """Set up comprehensive pip environment configuration."""
    # Index configuration
    os.environ['PIP_INDEX_URL'] = 'https://pypi.org/simple/'
    os.environ['PIP_TIMEOUT'] = '60'
    os.environ['PIP_RETRIES'] = '3'
    
    # Installation preferences
    os.environ['PIP_PREFER_BINARY'] = '1'
    os.environ['PIP_UPGRADE_STRATEGY'] = 'eager'
    
    # Cache configuration
    cache_dir = Path.home() / '.pip_cache'
    cache_dir.mkdir(exist_ok=True)
    os.environ['PIP_CACHE_DIR'] = str(cache_dir)
    
    print("Environment configuration set up")

def create_config_file(config_path, config_dict):
    """Create pip configuration file."""
    from configparser import ConfigParser
    
    config_path = Path(config_path)
    config_path.parent.mkdir(parents=True, exist_ok=True)
    
    config = ConfigParser()
    
    for section, values in config_dict.items():
        config.add_section(section)
        for key, value in values.items():
            config.set(section, key, str(value))
    
    with open(config_path, 'w') as f:
        config.write(f)
    
    print(f"Configuration file created at {config_path}")

# Usage examples
index_url = get_config('global.index-url')
print(f"Current index URL: {index_url}")

set_config('global.timeout', '60')
set_config('install.user', 'true', scope='user')

config_output = list_config()
print("Current configuration:")
print(config_output)

cache_info = get_cache_info()
print("Cache information:")
print(cache_info)

# Set up environment
setup_environment_config()

# Create custom configuration file
config_data = {
    'global': {
        'index-url': 'https://pypi.org/simple/',
        'timeout': 60,
        'retries': 3
    },
    'install': {
        'user': True,
        'upgrade': True
    }
}
create_config_file('~/.pip/pip.conf', config_data)

import os
import subprocess
import sys
from pathlib import Path

class PipConfigManager:
    """Advanced pip configuration management."""
    
    def __init__(self):
        self.config_locations = self._get_config_locations()
    
    def _get_config_locations(self):
        """Get pip configuration file locations."""
        locations = {}
        
        if os.name == 'nt':  # Windows
            locations['global'] = Path(os.environ.get('PROGRAMDATA', '')) / 'pip' / 'pip.ini'
            locations['user'] = Path(os.environ['APPDATA']) / 'pip' / 'pip.ini'
        else:  # Unix-like
            locations['global'] = Path('/etc/pip.conf')
            locations['user'] = Path.home() / '.config' / 'pip' / 'pip.conf'
            # Also check legacy location
            legacy_user = Path.home() / '.pip' / 'pip.conf'
            if legacy_user.exists():
                locations['user'] = legacy_user
        
        # Virtual environment configuration
        venv_prefix = os.environ.get('VIRTUAL_ENV')
        if venv_prefix:
            if os.name == 'nt':
                locations['site'] = Path(venv_prefix) / 'pip.ini'
            else:
                locations['site'] = Path(venv_prefix) / 'pip.conf'
        
        return locations
    
    def setup_development_environment(self):
        """Set up pip configuration for development."""
        config = {
            'global': {
                'timeout': '60',
                'retries': '3',
                'prefer-binary': 'true'
            },
            'install': {
                'upgrade': 'true',
                'upgrade-strategy': 'eager'
            },
            'freeze': {
                'exclude': 'pip setuptools wheel'
            }
        }
        
        self._write_config('user', config)
        
        # Set environment variables
        os.environ.update({
            'PIP_CACHE_DIR': str(Path.home() / '.pip_cache'),
            'PIP_LOG_FILE': str(Path.home() / '.pip' / 'pip.log')
        })
    
    def setup_production_environment(self):
        """Set up pip configuration for production."""
        config = {
            'global': {
                'timeout': '30',
                'retries': '5',
                'only-binary': ':all:',
                'no-compile': 'true'
            },
            'install': {
                'require-hashes': 'true',
                'no-deps': 'false'
            }
        }
        
        self._write_config('site', config)
    
    def _write_config(self, scope, config_dict):
        """Write configuration to file."""
        from configparser import ConfigParser
        
        config_path = self.config_locations.get(scope)
        if not config_path:
            raise ValueError(f"Unknown scope: {scope}")
        
        config_path.parent.mkdir(parents=True, exist_ok=True)
        
        config = ConfigParser()
        for section, values in config_dict.items():
            config.add_section(section)
            for key, value in values.items():
                config.set(section, key, str(value))
        
        with open(config_path, 'w') as f:
            config.write(f)

# Usage
manager = PipConfigManager()
manager.setup_development_environment()