Yarn Workspaces和Browserify - 子文件夹中的package.json会破坏构建

Question

我的最终目标是在使用Browserify和Babel 7的项目中使用Yarn Workspaces.这是我遇到的问题的最小再现.基本上似乎在子文件夹中存在一个package.json文件(这是你使用Yarn Workspaces时所拥有的东西之一)会破坏我的Browserify构建,我无法弄清楚原因.

这是一个GitHub回购,只有最小的问题再现.

首先,安装依赖项(你可以使用yarn或npm,无所谓):

$ npm install

然后确认Browserify + Babel构建工作:

$ npm run build

> browserify-babelify-yarn-workspaces@1.0.0 build /home/user/projects/browserify-babelify-yarn-workspaces
> browserify a/index.js -t babelify --outfile bundle.js

好的,一切都很好!我的编译代码在bundle.js中.

现在让我们在a文件夹中创建一个虚拟的package.json :

$ echo "{}" > a/package.json

这不应该改变构建,对吗？错误:

$ npm run build

> browserify-babelify-yarn-workspaces@1.0.0 build /home/user/projects/browserify-babelify-yarn-workspaces
> browserify a/index.js -t babelify --outfile bundle.js


/home/user/projects/browserify-babelify-yarn-workspaces/a/index.js:1
import lib from "./lib.js";
^
ParseError: 'import' and 'export' may appear only with 'sourceType: module'
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! browserify-babelify-yarn-workspaces@1.0.0 build: `browserify a/index.js -t babelify --outfile bundle.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the browserify-babelify-yarn-workspaces@1.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/user/.npm/_logs/2018-11-16T15_58_43_540Z-debug.log

我无法弄清楚为什么会这样.任何帮助,将不胜感激!

Answer 1

我认为 Babel 文档中实际上描述了我的问题。https://babeljs.io/docs/en/config-files#monorepos表示解决方案是使用 babel.config.js 文件而不是 .babelrc 文件。删除 .babelrc 并将其放入 babel.config.js 似乎确实有效：

module.exports = function (api) {
  api.cache(true);

  const presets = ["@babel/preset-env"];
  const plugins = [];

  return {
    presets,
    plugins
  };
}