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backend/js_nestjs.py

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+# -*- coding: utf-8 -*-
+"""
+JavaScript NestJS 后端项目初始化模块
+"""
+
+import subprocess
+import sys
+import shutil
+
+
+def run_command_interactive(cmd, cwd, description):
+    """运行命令并支持用户交互"""
+    print(f"\n{'=' * 60}")
+    print(f"执行: {description}")
+    print(f"{'=' * 60}")
+    print(f"💡 提示: 此步骤可能需要您进行交互操作")
+    print(f"{'=' * 60}\n")
+    
+    try:
+        result = subprocess.run(cmd, cwd=cwd, shell=True)
+        
+        print(f"\n{'=' * 60}")
+        if result.returncode == 0:
+            print(f"✅ {description} - 完成")
+        else:
+            print(f"❌ {description} - 失败 (错误码: {result.returncode})")
+        print(f"{'=' * 60}\n")
+        
+        return result.returncode == 0
+        
+    except Exception as e:
+        print(f"\n❌ 执行失败: {str(e)}")
+        return False
+
+
+def run_command_with_progress(cmd, cwd, description):
+    """运行命令并显示实时输出"""
+    try:
+        print(f"\n{'=' * 60}")
+        print(f"执行: {description}")
+        print(f"{'=' * 60}")
+        
+        process = subprocess.Popen(
+            cmd,
+            cwd=cwd,
+            shell=True,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT,
+            bufsize=0
+        )
+        
+        for line in process.stdout:
+            try:
+                decoded_line = line.decode('utf-8', errors='replace')
+            except:
+                try:
+                    decoded_line = line.decode('gbk', errors='replace')
+                except:
+                    decoded_line = line.decode('latin-1', errors='replace')
+            print(decoded_line, end='')
+        
+        process.wait()
+        
+        if process.returncode == 0:
+            print(f"\n{'=' * 60}")
+            print(f"✅ {description} - 完成")
+            print(f"{'=' * 60}\n")
+            return True
+        else:
+            print(f"\n{'=' * 60}")
+            print(f"❌ {description} - 失败 (错误码: {process.returncode})")
+            print(f"{'=' * 60}\n")
+            return False
+            
+    except Exception as e:
+        print(f"\n❌ 执行失败: {str(e)}")
+        return False
+
+
+def init_nestjs_project(backend_dir, project_name):
+    """初始化 NestJS 项目"""
+    print("\n🚀 初始化 NestJS 项目...")
+    print("\n⚠️  重要提示:")
+    print("   1. NestJS CLI 会询问使用哪个包管理器，建议选择 npm")
+    print("   2. 创建过程可能需要几分钟，请耐心等待\n")
+    
+    # 删除空目录，因为 NestJS CLI 需要创建目录
+    backend_dir.rmdir()
+    
+    # 使用 NestJS CLI 创建项目
+    success = run_command_interactive(
+        f"npx @nestjs/cli new {backend_dir.name} --skip-git",
+        backend_dir.parent,
+        "创建 NestJS 项目"
+    )
+    
+    if not success:
+        # 如果失败，重新创建目录
+        backend_dir.mkdir(exist_ok=True)
+        print("\n💡 提示: 请确保已安装 Node.js 和 npm")
+        print("   下载地址: https://nodejs.org/")
+        sys.exit(1)
+    
+    # 检查目录是否创建成功
+    if not backend_dir.exists():
+        print("❌ 项目目录创建失败")
+        sys.exit(1)
+    
+    # 修改默认端口为 8080 并添加 CORS
+    main_ts = backend_dir / "src" / "main.ts"
+    if main_ts.exists():
+        main_ts.write_text(f'''import {{ NestFactory }} from '@nestjs/core';
+import {{ AppModule }} from './app.module';
+
+async function bootstrap() {{
+  const app = await NestFactory.create(AppModule);
+  
+  // 启用 CORS
+  app.enableCors();
+  
+  // 设置全局前缀
+  app.setGlobalPrefix('api');
+  
+  await app.listen(8080);
+  console.log('🚀 服务器启动: http://localhost:8080');
+  console.log('📍 健康检查: http://localhost:8080/api/health');
+}}
+bootstrap();
+''', encoding='utf-8')
+    
+    # 修改 AppController 添加健康检查
+    app_controller = backend_dir / "src" / "app.controller.ts"
+    if app_controller.exists():
+        app_controller.write_text(f'''import {{ Controller, Get }} from '@nestjs/common';
+import {{ AppService }} from './app.service';
+
+@Controller()
+export class AppController {{
+  constructor(private readonly appService: AppService) {{}}
+
+  @Get('health')
+  health() {{
+    return {{
+      status: 'ok',
+      message: 'Welcome to {project_name} API',
+    }};
+  }}
+
+  @Get('hello')
+  getHello(): string {{
+    return this.appService.getHello();
+  }}
+}}
+''', encoding='utf-8')
+    
+    print("\n✅ NestJS 项目初始化成功")
+    print("💡 启动命令: npm run start:dev (开发模式) 或 npm run start (生产模式)")
+    print("📚 NestJS 文档: https://docs.nestjs.com/")