DevFlow CLI

A powerful command-line tool designed to streamline developer workflows by automating common tasks, providing project templates, and integrating with popular development tools.

Features

Project Scaffolding

Template Generation: Create new projects from predefined templates
Custom Templates: Support for user-defined project templates
Framework Support: Templates for React, Next.js, Node.js, and more
Configuration Setup: Automatic setup of linting, formatting, and testing tools

Workflow Automation

Git Integration: Automated git operations and branch management
Deployment Scripts: One-command deployment to various platforms
Environment Management: Easy switching between development environments
Database Operations: Database migration and seeding commands

Development Utilities

Code Generation: Generate components, services, and API endpoints
File Organization: Automatic file and folder structure organization
Dependency Management: Smart package installation and updates
Performance Analysis: Bundle size analysis and optimization suggestions

Installation & Usage

Global Installation

```bash npm install -g devflow-cli

or

yarn global add devflow-cli ```

Basic Commands

```bash

Create a new project

devflow create my-app --template react-ts

Generate a component

devflow generate component Button --props "text:string, onClick:function"

Deploy to production

devflow deploy --platform vercel

Analyze bundle size

devflow analyze --output detailed ```

Technical Implementation

CLI Architecture

Built with Commander.js for command parsing and Inquirer.js for interactive prompts.

```typescript // Example: Project creation command import { Command } from 'commander' import inquirer from 'inquirer' import chalk from 'chalk'

interface CreateOptions { template?: string typescript?: boolean git?: boolean }

export function createCommand() { return new Command('create') .argument('<project-name>', 'Name of the project to create') .option('-t, --template <template>', 'Project template to use') .option('--typescript', 'Use TypeScript') .option('--no-git', 'Skip git initialization') .description('Create a new project from template') .action(async (projectName: string, options: CreateOptions) => { try { console.log(chalk.blue(Creating project: ${projectName}))

    // Interactive template selection if not provided
    if (!options.template) {
      const { template } = await inquirer.prompt([
        {
          type: 'list',
          name: 'template',
          message: 'Select a project template:',
          choices: [
            'react-ts',
            'next-js',
            'node-express',
            'vue-ts',
            'custom'
          ]
        }
      ])
      options.template = template
    }
    
    await createProject(projectName, options)
    console.log(chalk.green(`✅ Project ${projectName} created successfully!`))
    
  } catch (error) {
    console.error(chalk.red(`❌ Error creating project: ${error.message}`))
    process.exit(1)
  }
})

} ```

Template System

Dynamic template system with variable substitution and conditional file inclusion.

```typescript // Template configuration interface Template { name: string description: string files: TemplateFile[] dependencies: string[] devDependencies: string[] scripts: Record<string, string> postInstall?: string[] }

interface TemplateFile { source: string destination: string template?: boolean condition?: string }

// Template processing async function processTemplate( templatePath: string, targetPath: string, variables: Record<string, any> ) { const template = await loadTemplate(templatePath)

for (const file of template.files) { // Check condition if (file.condition && !evaluateCondition(file.condition, variables)) { continue }

const sourcePath = path.join(templatePath, file.source)
const destPath = path.join(targetPath, file.destination)

if (file.template) {
  // Process template variables
  const content = await fs.readFile(sourcePath, 'utf-8')
  const processed = processTemplateVariables(content, variables)
  await fs.writeFile(destPath, processed)
} else {
  // Copy file as-is
  await fs.copyFile(sourcePath, destPath)
}

} } ```

Code Generation

Intelligent code generation with AST manipulation for precise code insertion.

```typescript // Component generation example async function generateComponent(name: string, options: ComponentOptions) { const componentTemplate = ` import React from 'react' {{#if typescript}} interface {{name}}Props { {{#each props}} {{name}}: {{type}} {{/each}} } {{/if}}

{{#if typescript}} export function {{name}}({ {{propNames}} }: {{name}}Props) { {{else}} export function {{name}}({ {{propNames}} }) { {{/if}} return ( <div className="{{kebabCase name}}"> <h1>{{name}} Component</h1> </div> ) } `

const variables = { name, typescript: options.typescript, props: parseProps(options.props), propNames: options.props?.map(p => p.name).join(', ') || '', kebabCase: (str: string) => str.replace(/([A-Z])/g, '-$1').toLowerCase() }

const processed = Handlebars.compile(componentTemplate)(variables) const filePath = path.join(options.outputDir, ${name}.${options.typescript ? 'tsx' : 'jsx'})

await fs.writeFile(filePath, processed)

// Generate test file if requested if (options.withTests) { await generateComponentTest(name, options) }

// Update index file await updateIndexFile(options.outputDir, name) } ```

Plugin System

Plugin Architecture

Extensible plugin system for custom functionality.

```typescript // Plugin interface interface DevFlowPlugin { name: string version: string commands?: Command[] hooks?: { beforeCreate?: (context: CreateContext) => Promise<void> afterCreate?: (context: CreateContext) => Promise<void> beforeDeploy?: (context: DeployContext) => Promise<void> } }

// Plugin loader class PluginManager { private plugins: Map<string, DevFlowPlugin> = new Map()

async loadPlugin(pluginPath: string) { const plugin = await import(pluginPath) this.plugins.set(plugin.name, plugin)

// Register commands
if (plugin.commands) {
  plugin.commands.forEach(command => {
    this.program.addCommand(command)
  })
}

}

async executeHook(hookName: string, context: any) { for (const plugin of this.plugins.values()) { if (plugin.hooks?.[hookName]) { await plugin.hookshookName } } } } ```

Configuration Management

Config File Support

Support for multiple configuration formats and environment-specific settings.

```typescript // Configuration schema interface DevFlowConfig { templates: { directory: string registry?: string } deployment: { default: string targets: Record<string, DeploymentTarget> } generators: { component: ComponentGeneratorConfig service: ServiceGeneratorConfig } plugins: string[] }

// Config loader with validation async function loadConfig(): Promise<DevFlowConfig> { const configPaths = [ 'devflow.config.js', 'devflow.config.json', '.devflowrc', 'package.json' // devflow section ]

for (const configPath of configPaths) { if (await fs.pathExists(configPath)) { const config = await loadConfigFile(configPath) return validateConfig(config) } }

return getDefaultConfig() } ```

Performance & Optimization

Caching Strategy

Intelligent caching for templates and generated code.

```typescript // Cache manager class CacheManager { private cacheDir = path.join(os.homedir(), '.devflow', 'cache')

async get<T>(key: string): Promise<T | null> { const cachePath = path.join(this.cacheDir, ${key}.json)

if (await fs.pathExists(cachePath)) {
  const cached = await fs.readJson(cachePath)
  
  // Check expiration
  if (cached.expires > Date.now()) {
    return cached.data
  }
}

return null

}

async set<T>(key: string, data: T, ttl = 3600000): Promise<void> { const cachePath = path.join(this.cacheDir, ${key}.json) await fs.ensureDir(path.dirname(cachePath))

await fs.writeJson(cachePath, {
  data,
  expires: Date.now() + ttl,
  created: Date.now()
})

} } ```

Testing Strategy

Unit Testing

Comprehensive test suite with mocked file system operations.

```typescript // Example test describe('Project Creation', () => { let mockFs: jest.Mocked<typeof fs>

beforeEach(() => { mockFs = fs as jest.Mocked<typeof fs> jest.clearAllMocks() })

it('should create project with correct structure', async () => { const projectName = 'test-project' const template = 'react-ts'

await createProject(projectName, { template })

expect(mockFs.ensureDir).toHaveBeenCalledWith(
  path.join(process.cwd(), projectName)
)
expect(mockFs.writeFile).toHaveBeenCalledWith(
  expect.stringContaining('package.json'),
  expect.stringContaining(projectName)
)

}) }) ```

Distribution & Publishing

NPM Package

Published as a scoped package with proper versioning and changelog.

```json { "name": "@douglascorrea/devflow-cli", "version": "1.2.0", "bin": { "devflow": "./dist/cli.js" }, "files": [ "dist/", "templates/", "README.md" ], "engines": { "node": ">=14.0.0" } } ```

Results & Impact

The CLI tool has achieved:

1,000+ downloads per month
50+ GitHub stars
Active community contributing templates and plugins
Reduced setup time by 80% for new projects
Standardized workflows across development teams

Future Enhancements

GUI Interface: Electron-based desktop application
Cloud Integration: Sync templates and configs across devices
AI-Powered Generation: Smart code generation using AI
Team Collaboration: Shared templates and configurations
Performance Monitoring: Built-in performance analysis tools

This project demonstrates expertise in Node.js development, CLI design patterns, and developer experience optimization.