npm CLI - Deployment and Usage Guide

Prerequisites

• Node.js: Version 16.20.0 or higher (LTS recommended)
• npm: Version 9.7.2 or higher (comes bundled with Node.js)
• Git: For cloning the repository and contributing
• GitHub Account: Required for submitting issues, pull requests, and participating in discussions

Installation

Since this repository has been archived and moved, follow these steps to install and use npm:

1. Install npm CLI (if not already installed):

   # Verify if npm is installed
   npm --version
   
   # If not installed, install Node.js (includes npm)
   # Download from https://nodejs.org/ or use your package manager
   

2. Clone the new repository (for development/contribution):

   git clone https://github.com/npm/cli.git
   cd cli
   npm install
   

3. Verify installation:

   npm --version
   node --version
   

Configuration

Environment Variables

The npm CLI uses the following environment variables:

• NPM_CONFIG_REGISTRY: Custom npm registry URL
• NPM_TOKEN: Authentication token for private packages
• NPM_CONFIG_PREFIX: Custom installation prefix
• NPM_CONFIG_CACHE: Custom cache directory

Configuration Files

• ~/.npmrc: User-level configuration
• .npmrc in project directory: Project-level configuration
• package.json: Project dependencies and scripts

Authentication

For publishing packages or accessing private registries:

npm login
# or
npm config set //registry.npmjs.org/:_authToken=your_token_here

Build & Run

Development

# Clone and install dependencies
git clone https://github.com/npm/cli.git
cd cli
npm install

# Run tests
npm test

# Run linting
npm run lint

# Build the project
npm run build

Production Usage

# Initialize a new project
npm init

# Install dependencies
npm install <package_name>

# Install dependencies from package.json
npm install

# Run scripts defined in package.json
npm run <script_name>

Deployment

Publishing Packages to npm Registry

# Log in to npm
npm login

# Publish your package
npm publish

Continuous Integration

Recommended CI platforms:

• GitHub Actions: Native integration with GitHub repositories
• Travis CI: Popular for open-source projects
• CircleCI: Advanced configuration options

Example GitHub Actions workflow:

name: Node CI
on: [push, pull_request]
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3
        with:
          node-version: '18'
      - run: npm ci
      - run: npm test

Hosting Applications

For Node.js applications built with npm packages:

• Vercel: Zero-config deployment for Node.js apps
• Netlify: Excellent for static sites and serverless functions
• Heroku: Traditional PaaS for Node.js applications
• AWS Elastic Beanstalk: Enterprise-grade deployment

Troubleshooting

Common Issues and Solutions

1. Permission Errors

# Fix permissions on Linux/macOS
sudo chown -R $USER:$(id -gn $USER) ~/.npm
sudo chown -R $USER:$(id -gn $USER) ~/.config

2. Network Issues

# Check registry connectivity
npm config get registry

# Switch to alternative registry
npm config set registry https://registry.npmjs.org/

# Use npm's built-in proxy
npm config set proxy http://proxy.company.com:8080
npm config set https-proxy http://proxy.company.com:8080

3. Dependency Conflicts

# Clear npm cache
npm cache clean --force

# Reinstall dependencies
rm -rf node_modules package-lock.json
npm install

# Check for outdated packages
npm outdated

# Update packages
npm update

4. Installation Failures

# Try with different npm version
nvm install 18
nvm use 18

# Use npm ci for clean install
npm ci

# Check Node.js version compatibility
node --version

5. Publishing Issues

# Check if package name is taken
npm view <package_name>

# Ensure you're logged in
npm whoami

# Check package.json requirements
# name, version, main, scripts.test are required

Getting Help

• Documentation: docs.npmjs.com
• Community Support: npm.community
• Bug Reports: github.com/npm/cli/issues
• Feature Requests: github.com/npm/rfcs/discussions
• Direct Support: npmjs.com/support

Performance Optimization

# Use npm ci for faster, cleaner installs in CI/CD
npm ci

# Enable npm's built-in performance optimizations
npm config set loglevel=error
npm config set progress=false

# Use package-lock.json for reproducible builds
npm install --package-lock-only

Security Best Practices

# Audit packages for vulnerabilities
npm audit

# Fix vulnerabilities automatically
npm audit fix

# Check for outdated packages
npm outdated

# Use npm's security features
npm config set save=true
npm config set save-exact=true