[rush] rushx does not expose npmrc settings as environment variables

[octogonz]

Summary

When settings are defined in .npmrc, commands such as npm run, pnpm run, and yarn run map these settings to subprocess environment variables so that they can be easily accessed by the invoked script. rushx is missing this feature.

Repro steps

@Tanimodori provided a very helpful repro here, which defines a variable in <project folder>/.npmrc as well as common/config/rush/.npmrc:

https://github.com/Tanimodori/rushx-npmrc-issue

In this repro, rushx doesn't declare any environment variables.

Here's a comparison of outputs from other tools:

npm run test:

NPM_CLI_JS=C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js
npm_command=run-script
npm_config_cache=C:\Users\Owner\AppData\Local\npm-cache
npm_config_globalconfig=C:\Program Files\nodejs\etc\npmrc
npm_config_global_prefix=C:\Program Files\nodejs
npm_config_init_module=C:\Users\Owner\.npm-init.js
npm_config_local_npmrc_var=local_npmrc_var
npm_config_local_prefix=C:\GitR\rushx-npmrc-issue\packages\example-package
npm_config_metrics_registry=https://registry.npmjs.org/
npm_config_node_gyp=C:\Users\Owner\AppData\Roaming\nvm\v16.17.0\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js
npm_config_noproxy=
npm_config_prefix=C:\Program Files\nodejs
npm_config_userconfig=C:\Users\Owner\.npmrc
npm_config_user_agent=npm/8.15.0 node/v16.17.0 win32 x64 workspaces/false
npm_execpath=C:\Users\Owner\AppData\Roaming\nvm\v16.17.0\node_modules\npm\bin\npm-cli.js
npm_lifecycle_event=test
npm_lifecycle_script=node index.js
npm_node_execpath=C:\Program Files\nodejs\node.exe
npm_package_json=C:\GitR\rushx-npmrc-issue\packages\example-package\package.json
npm_package_name=example-package
npm_package_version=0.0.1
NPM_PREFIX_NPM_CLI_JS=C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js

pnpm run test:

npm_command=run-script
npm_config_LOCAL_NPMRC_VAR=local_npmrc_var
npm_config_node_gyp=C:\Users\Owner\AppData\Roaming\nvm\v16.17.0\node_modules\pnpm\dist\node_modules\node-gyp\bin\node-gyp.js
npm_config_registry=https://registry.npmjs.org/
npm_config_user_agent=pnpm/8.5.1 npm/? node/v16.17.0 win32 x64
npm_execpath=C:\Users\Owner\AppData\Roaming\nvm\v16.17.0\node_modules\pnpm\bin\pnpm.cjs
npm_lifecycle_event=test
npm_lifecycle_script=node index.js
npm_node_execpath=C:\Program Files\nodejs\node.exe
npm_package_author=
npm_package_description=
npm_package_license=ISC
npm_package_main=index.js
npm_package_name=example-package
npm_package_scripts_test=node index.js
npm_package_version=0.0.1

yarn run test:

npm_config_argv={"remain":[],"cooked":["run","test"],"original":["run","test"]}
npm_config_bin_links=true
npm_config_ignore_optional=
npm_config_ignore_scripts=
npm_config_init_license=MIT
npm_config_init_version=1.0.0
npm_config_LOCAL_NPMRC_VAR=local_npmrc_var
npm_config_registry=https://registry.yarnpkg.com
npm_config_save_prefix=^
npm_config_strict_ssl=true
npm_config_user_agent=yarn/1.22.19 npm/? node/v16.17.0 win32 x64
npm_config_version_commit_hooks=true
npm_config_version_git_message=v%s
npm_config_version_git_sign=
npm_config_version_git_tag=true
npm_config_version_tag_prefix=v
npm_execpath=C:\Users\Owner\AppData\Roaming\nvm\v16.17.0\node_modules\yarn\bin\yarn.js
npm_lifecycle_event=test
npm_lifecycle_script=node index.js
npm_node_execpath=C:\Program Files\nodejs\node.exe
npm_package_description=
npm_package_license=ISC
npm_package_main=index.js
npm_package_name=example-package
npm_package_scripts_test=node index.js
npm_package_version=0.0.1

Details

There are some differences in the outputs, but they all successfully define npm_config_LOCAL_NPMRC_VAR. The GLOBAL_NPMRC_VAR is only expected from rushx, since it is aware of common/config/rush/.npmrc.

Standard questions

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

Question	Answer
@microsoft/rush globally installed version?	5.90.0
rushVersion from rush.json?	5.90.0
useWorkspaces from rush.json?	true
Operating system?	Windows
Would you consider contributing a PR?	Yes
Node.js version (node -v)?	16.17.0