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贡献生成器

让我们为@aws/nx-plugin创建一个新的生成器，目标是为tRPC API生成新的操作流程。

查看插件

Section titled “查看插件”

首先克隆插件仓库：

Terminal window
git clone git@github.com:awslabs/nx-plugin-for-aws.git

安装并构建：

Terminal window
cd nx-plugin-for-aws
pnpm i
pnpm nx run-many --target build --all

创建空生成器

Section titled “创建空生成器”

在packages/nx-plugin/src/trpc/procedure目录下创建新生成器。

我们提供了一个生成器脚手架工具，可快速创建新生成器：

  1. 安装 Nx Console VSCode Plugin 如果您尚未安装
  2. 在VSCode中打开Nx控制台
  3. 点击 Generate (UI) 在"Common Nx Commands"部分
  4. 搜索 @aws/nx-plugin - ts#nx-generator
  5. 填写必需参数
    • pluginProject: @aws/nx-plugin
    • name: ts#trpc-api#procedure
    • directory: trpc/procedure
    • description: 为tRPC API添加操作流程
  6. 点击 Generate

生成的文件结构如下：

  • 文件夹packages/nx-plugin/src/trpc/procedure
    • schema.json 定义生成器的输入参数
    • schema.d.ts 与schema对应的TypeScript接口
    • generator.ts Nx运行的生成器主逻辑
    • generator.spec.ts 生成器测试用例
  • 文件夹docs/src/content/docs/guides/
    • trpc-procedure.mdx 生成器文档
  • packages/nx-plugin/generators.json 更新后的生成器配置

更新schema.json添加必要属性：

{
  "$schema": "https://json-schema.org/schema",
  "$id": "tRPCProcedure",
  "title": "为tRPC API添加操作流程",
  "type": "object",
  "properties": {
    "project": {
      "type": "string",
      "description": "目标tRPC API项目",
      "x-prompt": "选择要添加操作流程的tRPC API项目",
      "x-dropdown": "projects",
      "x-priority": "important"
    },
    "procedure": {
      "description": "新操作流程名称",
      "type": "string",
      "x-prompt": "请输入新操作流程名称",
      "x-priority": "important",
    },
    "type": {
      "description": "要生成的操作类型",
      "type": "string",
      "x-prompt": "选择要生成的操作类型",
      "x-priority": "important",
      "default": "query",
      "enum": ["query", "mutation"]
    }
  },
  "required": ["project", "procedure"]
}

生成器已自动注册到packages/nx-plugin/generators.json：

 ...
  "generators": {
    ...
    "ts#trpc-api#procedure": {
      "factory": "./src/trpc/procedure/generator",
      "schema": "./src/trpc/procedure/schema.json",
      "description": "为tRPC API添加操作流程"
    }
  },
...

实现生成器

Section titled “实现生成器”

实现步骤如下：

  1. 创建新操作流程的TypeScript文件
  2. 将操作流程添加到路由

创建操作流程文件

Section titled “创建操作流程文件”

使用generateFiles工具生成模板文件。模板位于packages/nx-plugin/src/trpc/procedure/files/procedures/__procedureNameKebabCase__.ts.template：

files/procedures/__procedureNameKebabCase__.ts.template
import { publicProcedure } from '../init.js';
import { z } from 'zod';


export const <%- procedureNameCamelCase %> = publicProcedure
  .input(z.object({
    // TODO: 定义输入参数
  }))
  .output(z.object({
    // TODO: 定义输出格式
  }))
  .<%- procedureType %>(async ({ input, ctx }) => {
    // TODO: 实现业务逻辑
    return {};
  });

更新生成器逻辑：

procedure/generator.ts
import {
  generateFiles,
  joinPathFragments,
  readProjectConfiguration,
  Tree,
} from '@nx/devkit';
import { TrpcProcedureSchema } from './schema';
import { formatFilesInSubtree } from '../../utils/format';
import camelCase from 'lodash.camelcase';
import kebabCase from 'lodash.kebabcase';


export const trpcProcedureGenerator = async (
  tree: Tree,
  options: TrpcProcedureSchema,
) => {
  const projectConfig = readProjectConfiguration(tree, options.project);


  const procedureNameCamelCase = camelCase(options.procedure);
  const procedureNameKebabCase = kebabCase(options.procedure);


  generateFiles(
    tree,
    joinPathFragments(__dirname, 'files'),
    projectConfig.sourceRoot,
    {
      procedureNameCamelCase,
      procedureNameKebabCase,
      procedureType: options.type,
    },
  );


  await formatFilesInSubtree(tree);
};


export default trpcProcedureGenerator;

添加操作流程到路由

Section titled “添加操作流程到路由”

使用AST操作更新路由文件：

procedure/generator.ts
import {
  generateFiles,
  joinPathFragments,
  readProjectConfiguration,
  Tree,
} from '@nx/devkit';
import { TrpcProcedureSchema } from './schema';
import { formatFilesInSubtree } from '../../utils/format';
import camelCase from 'lodash.camelcase';
import kebabCase from 'lodash.kebabcase';
import { destructuredImport, replace } from '../../utils/ast';
import { factory, ObjectLiteralExpression } from 'typescript';


export const trpcProcedureGenerator = async (
  tree: Tree,
  options: TrpcProcedureSchema,
) => {
  const projectConfig = readProjectConfiguration(tree, options.project);


  const procedureNameCamelCase = camelCase(options.procedure);
  const procedureNameKebabCase = kebabCase(options.procedure);


  generateFiles(
    tree,
    joinPathFragments(__dirname, 'files'),
    projectConfig.sourceRoot,
    {
      procedureNameCamelCase,
      procedureNameKebabCase,
      procedureType: options.type,
    },
  );


  const routerPath = joinPathFragments(projectConfig.sourceRoot, 'router.ts');


  destructuredImport(
    tree,
    routerPath,
    [procedureNameCamelCase],
    `./procedures/${procedureNameKebabCase}.js`,
  );


  replace(
    tree,
    routerPath,
    'CallExpression[expression.name="router"] > ObjectLiteralExpression',
    (node) =>
      factory.createObjectLiteralExpression([
        ...(node as ObjectLiteralExpression).properties,
        factory.createShorthandPropertyAssignment(procedureNameCamelCase),
      ]),
  );


  await formatFilesInSubtree(tree);
};


export default trpcProcedureGenerator;

编译生成器：

Terminal window
pnpm nx run @aws/nx-plugin:compile

测试生成器

Section titled “测试生成器”

创建测试项目

Section titled “创建测试项目”

新建测试工作区：

Terminal window
npx create-nx-workspace@~21.0.3 trpc-generator-test --pm=pnpm --preset=@aws/nx-plugin --ci=skip

生成测试用tRPC API：

  1. 安装 Nx Console VSCode Plugin 如果您尚未安装
  2. 在VSCode中打开Nx控制台
  3. 点击 Generate (UI) 在"Common Nx Commands"部分
  4. 搜索 @aws/nx-plugin - ts#trpc-api
  5. 填写必需参数
    • apiName: test-api
  6. 点击 Generate

链接本地插件

Section titled “链接本地插件”

在项目中链接本地插件：

Terminal window
cd path/to/trpc-generator-test
pnpm link path/to/nx-plugin-for-aws/dist/packages/nx-plugin

运行生成器

Section titled “运行生成器”

执行新生成器：

  1. 安装 Nx Console VSCode Plugin 如果您尚未安装
  2. 在VSCode中打开Nx控制台
  3. 点击 Generate (UI) 在"Common Nx Commands"部分
  4. 搜索 @aws/nx-plugin - ts#trpc-api#procedure
  5. 填写必需参数
    • 点击 Generate

    扩展练习

    Section titled “扩展练习”
    1. 嵌套操作：支持通过点分隔符（如games.query）创建嵌套路由
    2. 输入校验：增加对非tRPC项目的选择防护
    3. 单元测试：编写生成器单元测试用例
    4. 端到端测试：更新现有测试用例包含新生成器