[rush] rushx does not support npm environment vars (e.g. npm_package_version)

[Woutwo]

Summary

I have a create-react-app project with an environment file (.env) that contains the following line:

REACT_APP_VERSION=$npm_package_version

When running npm run start or pnpm run start, the variable gets populated with the correct version number from the package.json. When running rushx start, this does not work. The environment variable stays empty.

Repro steps

Setup a new Rush installation with a single project inside, only containing a package.json with the following contents:

{
  "name": "test",
  "version": "1.0.0",
  "description": "",
  "scripts": {
    "test": "echo $npm_package_version"
  },
  "author": "",
  "license": "ISC"
}

Then run the following command in that project:

rushx test

Expected result:

$ npm run test
> echo $npm_package_version

1.0.0

Actual result:

$ rushx test
> "echo $npm_package_version"

Details

Standard questions

Please answer these questions to help us investigate your issue more quickly:

Question	Answer
@microsoft/rush globally installed version?	@microsoft/rush@5.71.0
rushVersion from rush.json?	5.74.0
useWorkspaces from rush.json?	true
Operating system?	Mac Apple Silicon
Would you consider contributing a PR?	Yes
Node.js version (node -v)?	18.1.0

[iclanton]

Yeah this is a missing feature. It'd be awesome if you were interested in putting this together.

[sophos-rickc]

This is an issue for my team. Weuse $npm_config_... variables in some of our package.json scripts. However, this means that the scripts cannot be run using rushx {scriptName}, but instead must be run as npm run {scriptName}. This feels like we're half in and half out with rushjs.

We would really like to see this feature added to Rush.