Node.js typescript Azure 函数 : Cannot import with absolute path ( minimal reproducible example attached)

Question

我在本地有这个 Nodejs Typescript Azure 函数:

<root-directory>
├── README.md
├── dist
├── host.json
├── local.settings.json
├── node_modules
├── package-lock.json
├── package.json
├── sealworker
│   ├── constants
│   ├── errors
│   ├── function.json
│   ├── index.ts
│   ├── interfaces
│   ├── sample.dat
│   ├── services
│   │     ├── worker.ts
│   │     └── ...
│   └── utils
│         ├── machineInfo.ts
│         └── ...
└── tsconfig.json

这是tsconfig.json:

{
  "compilerOptions": {
    "module": "commonjs",
    "moduleResolution": "node",
    "target": "es6",
    "outDir": "dist",
    "rootDir": ".",
    "sourceMap": true,
    "strict": false,
    "esModuleInterop": true,
    "preserveConstEnums": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "baseUrl": "./sealworker",
    "paths": {
      "*": [
        "*",
        "sealworker/*",
        "node_modules/*"
      ]
    }
  },
  "exclude": [
    "node_modules",
    "**/*.test.ts"
  ],
  "include": [
    "**/*"
  ]
}

package.json:

{
  "name": "azure_function",
  "version": "1.0.0",
  "description": "",
  "scripts": {
    "build": "tsc",
    "watch": "tsc -w",
    "clean": "rimraf dist",
    "prestart": "npm run clean && npm run build",
    "start": "func start",
    "test": "echo \"No tests yet...\""
  },

   ...

这是index.ts，它从./services/worker.ts导入一个函数:

import { AzureFunction, Context, HttpRequest } from "@azure/functions";
import { workerExec } from "./services/worker";

const sealWorkerFunction: AzureFunction = async function (
  context: Context,
  req: HttpRequest
): Promise<void> {

...

这是./services/worker.ts:

import "dotenv/config";
import "reflect-metadata";
import { HttpRequest, Context } from "@azure/functions";
import { getMachineInfo } from "utils/machineInfo";

export const workerExec = async (req: HttpRequest, context: Context) => {
  context.log("start....");

这是utils/machineInfo.ts:

import os from "os";

// Get the machine info that identifies the current host running this code;
export const getMachineInfo = () => {
  const machineInfo = {
    // The machine's hostname;
    hostname: os.hostname(),
    // the machine's number of CPUs;
    numCPUs: os.cpus().length,
  };
  return machineInfo;
};

现在它提示内联:

import { getMachineInfo } from "utils/machineInfo";

找不到模块“utils/machineInfo”:

错误消息:

[2023-08-10T03:59:00.616Z] Worker was unable to load entry point "dist/sealworker/index.js": Cannot find module 'utils/machineInfo'
[2023-08-10T03:59:00.616Z] Require stack:
[2023-08-10T03:59:00.616Z] - /Users/code/seal/azure_function/dist/sealworker/services/worker.js
[2023-08-10T03:59:00.616Z] - /Users/code/seal/azure_function/dist/sealworker/index.js
[2023-08-10T03:59:00.616Z] - /usr/local/Cellar/azure-functions-core-tools@4/4.0.5198/workers/node/dist/src/worker-bundle.js
[2023-08-10T03:59:00.616Z] - /usr/local/Cellar/azure-functions-core-tools@4/4.0.5198/workers/node/dist/src/nodejsWorker.js

我在 tsconfig.json 中使用 "baseUrl" 和 "paths" 尝试了不同的操作，并且这些值应该是直接的现在不言自明了。但显然我在某个地方犯了错误......

有什么建议吗？

---------更新---------

我已经在以下位置创建了一个公共(public)的最小可复制存储库:https://github.com/DaCao/minimal_reproducible_example

要重现，请 git 克隆此存储库并打开 VS Code:

1. 您需要在 VS Code 中安装 Azure 工具插件；

2. 在本地工作空间中，单击 Azure 函数图标并选择:

完成创建过程；选择编程模型V3；

设置本地项目后，构建nodejs:

john@MacBook-Pro:~/myapp/code/minimal_reproducible_example$ ls
host.json            local.settings.json  node_modules/        package-lock.json    package.json         sealworker/          tsconfig.json
john@MacBook-Pro:~/myapp/code/minimal_reproducible_example$ npm run-script build

> <a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7c11151215111d10230e190c0e1318091f151e10192319041d110c10193c4d524c524c" rel="noreferrer noopener nofollow">[email protected]</a> build /Users/john/myapp/code/minimal_reproducible_example
> tsc

john@MacBook-Pro:~/myapp/code/minimal_reproducible_example$ 

您还需要安装Azure Function Core Tools:

john@MacBook-Pro:~/myapp/code/minimal_reproducible_example$ func -v 
4.0.5198

然后运行:

john@MacBook-Pro:~/myapp/code/minimal_reproducible_example$ func start

您应该看到错误:

...

For detailed output, run func with --verbose flag.
[2023-08-11T05:38:06.464Z] Worker process started and initialized.
[2023-08-11T05:38:06.474Z] Worker was unable to load function sealworker: 'Cannot find module 'services/JobProcessor'
[2023-08-11T05:38:06.474Z] Require stack:
[2023-08-11T05:38:06.474Z] - /Users/john/myapp/code/minimal_reproducible_example/dist/sealworker/services/worker.js
[2023-08-11T05:38:06.474Z] - /Users/john/myapp/code/minimal_reproducible_example/dist/sealworker/index.js
[2023-08-11T05:38:06.474Z] - /usr/local/Cellar/azure-functions-core-tools@4/4.0.5198/workers/node/dist/src/worker-bundle.js
[2023-08-11T05:38:06.474Z] - /usr/local/Cellar/azure-functions-core-tools@4/4.0.5198/workers/node/dist/src/nodejsWorker.js'

...

Answer 1

根据您的堆栈跟踪，我猜您使用 tsc 编译代码，然后使用 node 执行。请记住，如果您使用 tsc 构建，绝对路径最终将根本不会转换为相对路径。

因此，我建议采取额外的步骤，使用 tsc-alias 来转换这些路径。

// package.json
{
  "build": "tsc && tsc-alias",
}

查看示例存储库后更新:

我注意到您设置了 rootDir: "." ，它将在同一目录 sealworker 下包含您构建的代码，但不幸的是，此设置会阻止 tsc-alias 由于某种我也不知道的原因而无法正常工作(向他们报告可能是一个错误)。

无论如何，我建议设置另一个命令将构建的代码移动到目录中，甚至删除此设置并将构建的代码放在 dist 下就足够了。