Library multiple entry points

Exactly the same as that issue that was closed by the bot but without any solution.

Description

I want to have the option to publish a library with two endpoints. i.e.

@my-scope/testing/e2e
@my-scope/testing/unit-tests

Where in the e2e I want to include Cypress utils (with Cypress dependency) and in unit-tests I want to include Jasmine utils (with Jasmine dependency)

Motivation

Currently, I can’t do the above as both Cypress & Jasmine have an expect global method, so when I import @my-scope/testing it imports both dependencies.

And tree-shaking in general.

• worth mentioning - I’m using NX to generate libraries monorepo, and I’m using the libraries in external projects (not inside the monorepo, that’s why I can’t start it as an Angular-monorepo and only use the basic Node approach).

Suggested Implementation

Same as ng-packager: create a package.json (name, dependencies) under the needed library with index.ts as an entry-point.

[EladBezalel]

Managed to workaround it by doing this:

under my lib directory i created a rollup config that extends nx one

const nrwlConfig = require('@nrwl/react/plugins/bundle-rollup');

module.exports = config => {
  const nxConfig = nrwlConfig(config);
  
  if (nxConfig.output.format === 'esm') {
    nxConfig.input = {
      index: nxConfig.input,
      utils: join(__dirname, './src/utils/index.ts'),
    };
  }

  return nxConfig;
};

i do this only for esm as i don’t need it for the umd build

in libs/mylib/package.json i added

"exports": {
  ".": "./index.esm.js",
  "./utils": "./utils/utils.esm.js"
},
"typesVersions": {
  "*": {
    "utils": [
      "utils/index"
    ]
  }
}

and in workspace.json under the lib build script:

"build": {
  "executor": "@nrwl/web:rollup",
  "options": {
    "rollupConfig": "libs/mylib/rollup.config.js",
  }
},

and in order for it to work in the workspace as well, add in tsconfig.base.json

{
  "compilerOptions": {
    "paths": {      
      "@my-scope/mylib/utils": ["libs/mylib/src/utils/index.ts"],
    }
  },
}

Hope it helps 🙏

[fguitton]

Not stale 🎈