Missing "import" key in package.json exports for ESM compatibility

[Vorathe]

Describe the bug
Upgraded to 1.0.12 from 1.0.9 and after running eslint with this update, I see the following error:

Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: No "exports" main defined in /node_modules/@smarttools/eslint-plugin-rxjs/package.json imported from /eslint.config.mjs

Repro
Version of @smarttools/eslint-plugin-rxjs you are using: 1.0.12

1. Create a ESM compatible eslint config
2. Import '@smarttools/eslint-plugin-rxjs' and add it to plugins and add recommended rules
3. Run eslint against any file
4. See error above

Repository that has a reproduction of the problem: Private

Additional context
Downgrading to @smarttools/eslint-plugin-rxjs@1.0.9 resolves the issue for my project.

Adding "import": "./index.cjs", to the exports in package.json#33 fixes the issue in 1.0.12 for ESM based configs:

"exports": { ".": { "require": "./index.cjs", "import": "./index.cjs", "types": "./index.d.ts" } }

[DaveMBush]

A sample project would be helpful.

[amikheychik]

@DaveMBush the bug report has a correct suggestion.

CommonJS file can be imported into ES modules. But as you explicitly set exports for require, you also have to explicitly set "import": "./index.cjs" (or remove the whole exports block).

Variant A:

{
  "name": "@smarttools/eslint-plugin-rxjs",
  
  "type": "commonjs",
  "main": "./index.cjs",
  "types": "./index.d.ts"
}

Variant B:

{
  "name": "@smarttools/eslint-plugin-rxjs",

  "type": "commonjs",
  "main": "./index.cjs",
  "types": "./index.d.ts",
  "module": "./index.cjs",
  "exports": {
    ".": {
      "require": "./index.cjs",
      "types": "./index.d.ts",
       "import": "./index.cjs"
    }
  }
}

[DaveMBush]

Yes, and thank you.

The reason I want a project that exhibits the problem is so I have something I can test the change against, at least manually, so I can prove to myself that the change fixes the problem and so that the problem does not show up in the future.

[amikheychik]

@DaveMBush I've added https://github.com/amikheychik/eslint-rxjs-example

[DaveMBush]

Thank you so much

[rubiesonthesky]

https://arethetypeswrong.github.io/?p=%40smarttools%2Feslint-plugin-rxjs%401.0.13 highlights some problem that kinda works right now but relies on Typescript bug, if I understood correctly.

--

I have this same problem on versions > 1.0.8

Minimalish eslint config file: eslint.config.mjs

import rxjs from '@smarttools/eslint-plugin-rxjs';
import tseslint from 'typescript-eslint';

export default tseslint.config(
  {
    plugins: {
      '@typescript-eslint': tseslint.plugin,
      rxjs,
    },
  },
  {
    files: ['**/*.ts'],
    extends: [
      rxjs.configs.recommended,
    ],
  },
);

[DaveMBush]

This should be fixed in 1.0.14