使用TypeScript和Webpack在项目之间共享代码 [英] Sharing code between projects using TypeScript and webpack

问题描述

我想在两个TypeScript项目之间共享代码.我不想将共享代码发布到NPM，而只是想将共享代码放在一个项目中并在另一个项目中使用它.我正在使用 Webpack 和

I want to share code between two TypeScript projects. I don't want to publish shared code to NPM-- just want to put shared code in one project and use it in another project. I'm using Webpack and awesome-ts-loader. Current folder structure (simplified) is like this:

/devroot/
  mainProject/
    tsconfig.json
    src/
      shared/
        SomeSharedTypes.ts
  apiProject/
    tsconfig.json
    webpack.config.js
    src/
      UseSomeSharedType.ts

在UseSomeSharedType.ts中，我希望能够从SomeSharedTypes.ts导入类型.

In UseSomeSharedType.ts, I want to be able to import types from SomeSharedTypes.ts.

我尝试了一个显而易见的解决方案，如下所示:

I tried an obvious solution like this:

import {SharedType} from '../../mainProject/src/shared/SomeSharedTypes'

但是TS编译器给了我这个错误:

But the TS compiler gave me this error:

TS6059:文件'/devroot/mainProject/src/shared/SomeSharedTypes.ts'是 不在'rootDir''/devroot/apiProject'下. 'rootDir'有望 包含所有源文件.

TS6059: File '/devroot/mainProject/src/shared/SomeSharedTypes.ts' is not under 'rootDir' '/devroot/apiProject'. 'rootDir' is expected to contain all source files.

推荐答案

我从这篇中篇文章，该文章使用TypeScript的非相对模块导入功能.这样，我就可以这样编写导入文件:

The first idea I got from this Medium article, which was to use TypeScript's non-relative module imports feature. This would allow me to write my imports like this:

import {SharedType} from '@foo/SomeSharedTypes'

使用本文中介绍的技术，我在tsconfig.json中添加了paths配置:

Using the techniques described in the article, I added a paths configuration to my tsconfig.json:

{
  "compilerOptions": {
    "baseUrl": ".",
    "paths": {
      "@foo/*": ["../mainProject/src/shared/*"],
    },
    "rootDir": "./",
    ...
  }
}

然后，再次按照文章的建议，对于awesome-typescript-loader的用户，我不得不修改我的webpack.config.js以添加一个解析插件:

Then, again as the article recommends, for users of awesome-typescript-loader, I had to modify my webpack.config.js to add a resolution plugin:

const { TsConfigPathsPlugin } = require('awesome-typescript-loader');
. . .
  resolve: {
    extensions: ['.js', '.json', '.ts'],
    plugins: [
      new TsConfigPathsPlugin(),
    ],
  }

重要提示:此插件需要进入文件的resolve/plugins部分，而不是根目录级别的"plugins"部分！如果将旋转变压器插件放在错误的位置，则会出现此错误:

Important: this plugin needs to go into the resolve/plugins section of the file, not the root-level "plugins" section! If you put the resolver plugin in the wrong place, you'll get this error:

resolver.ensureHook不是函数

resolver.ensureHook is not a function

上面的步骤使我在过程中走得更远-TypeScript现在可以找到我的文件了！-但是稍后在webpack的执行中我仍然遇到相同的错误:'rootDir' is expected to contain all source files.

The steps above got me further along in the process-- TypeScript was now able to find my files!--but I still got the same error later in webpack's execution: 'rootDir' is expected to contain all source files.

经过更多的Google搜索之后，我在此StackOverflow答案中找到了一个解决方案:而不是单个rootDir配置，TS具有 rootDirs 允许多个根的设置.我从tsconfig.json中删除了rootDir设置，并添加了rootDirs设置:

After a lot more Googling, I found a solution in this StackOverflow answer: instead of a single rootDir configuration, TS has a rootDirs setting that allows multiple roots. I removed my rootDir setting from tsconfig.json and added a rootDirs setting:

"rootDirs": [
  "./",
  "../mainProject",
],

接下来，我遇到了我所包含的另一个项目的TypeScript文件的webpack错误:

Next, I ran into a webpack error on the other-project TypeScript file I was including:

模块解析失败:意外令牌(3:15)

Module parse failed: Unexpected token (3:15)

您可能需要适当的加载程序来处理此文件类型.

You may need an appropriate loader to handle this file type.

经过一个小时的故障排除后，我发现我需要告诉webpack加载器我的新共享文件夹.像这样:

After another hour of troubleshooting, I figured out that I need to tell the webpack loader about my new shared folder. Like this:

const path = require('path');
. . .
  rules: [
    {
      test: /\.[jt]sx?$/,
      loader: "awesome-typescript-loader",
      include: [
        __dirname,
        path.resolve(__dirname, "../mainProject/src/shared/")
      ],
      exclude: /node_modules/
    },

行得通！关于此解决方案的好处是，我可以重构文件夹结构而无需更改源代码.我需要更改的只是tsconfig.json和webpack.config.js.

That worked! The nice part about this solution is that I can refactor my folder structure without changing source code. All I'd need to change is tsconfig.json and webpack.config.js.

我当然不熟悉使用webpack和TypeScript，所以可能有比上述解决方案更好的解决方案...但是上述解决方案对我有用！

I'm admittedly new to using webpack and TypeScript, so there may be a better solution than the one above... but the one above worked for me!

在此处共享解决方案，以使下一个开发人员更容易找到它.

Sharing the solution here to make it easier for the next developer to find it.

这篇关于使用TypeScript和Webpack在项目之间共享代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！