Babel 7 monorepo issue

v7 Regression

Describe the regression I want to run build/test cli command from packages as well, not just from the project root. If I run npx babel-node index.js in my project root, everything works as expected. But if I run npx babel-node index.js inside packages/packA, I get the following error:

/Users/djudik/repos/babel-7/packages/packB/index.js:3
export default (a: number, b: number) => {
^^^^^^

SyntaxError: Unexpected token export

I assume that packB file does not get compiled when I want to use it from packA, not from the project root.

Input Code https://github.com/judikdavid/babel-7

Babel Configuration (.babelrc, package.json, cli command) https://github.com/judikdavid/babel-7/blob/master/babel.config.js

Expected behavior/code I should be able to use babel from any packages folder and it should use the root babel.config.js config.

Environment

• Babel version(s): “@babel/core”: “^7.1.2”
• Node/npm version: Node 10.11.0/npm 6.4.1
• OS: OSX 10.14]
• Monorepo: yes
• How you are using Babel: cli

[rwieruch]

I find it super difficult to find a minimal working example project on this topic 😃

[sibelius]

@nicolo-ribaudo

this is my monorepo structure, using yarn workspaces

packages
- api
---- src
- graphql
---- src
- common
---- src

all packages have a main pointing to src/index.js on package.json

I wan to import functions from common package inside api package

sample code:

import { myFn } from 'common'

use have a babel.config.js on root, it has the same configs of all packages, and we also tried to add babelrcRoots to try to fix some issues:

const { workspaces = [] } = require('./package.json');

module.exports = {
  babelrcRoots: [
    '.',
    ...(workspaces.packages || workspaces),
  ],
  // presets and plugins here

We are getting the folowing error:

repo/packages/common/src/index.js
import  myFn from './myFn'';
       ^^^^^^^^^^^^^^^^

SyntaxError: Unexpected identifier

so it looks like babel-node is not transpiling common package

we tried to run the api like this:

./node_modules/.bin/babel-node ./packages/api/src/index.js

but this command broke the imports

then we used lerna run, and it worked well:

scripts of package.json (root)

"start:api": "lerna run start --scope api --stream",

scripts on api package.json (api)

"start": "babel-node src/index.js",

am I missing anything?, should I have a include on babel.config.js or use --ignore when calling babel-node?