eslint-plugin-import-extended

Rules

no-internal-from-external-modules

This rule prevents external modules and files from accessing a module's internals, while allowing the module itself to reference its own internals. Modules can still accessed via their index files, establishing a pattern of public vs private interfaces.

Options

Option	type	description	Ex
moduleRoot	array of strings (path or glob pattern)	Sets the top level folder where a module may be accessed.	`[*/packages/]` or `[src/modules/myModule]`

Examples

Given the following folder structure:

my-project
├── packages
│   └── package-one
│       └── index.ts
│       └── internal-file-one.ts
│   └── package-two
│       └── index.ts
│       └── internal-file-two.ts
└── entry.js

And the .eslintrc file:

{
  ...
  "rules": {
    "import-extended/no-internal-from-external-modules": [ "error", {
      "moduleRoot": ["**/packages/*"],
    } ]
  }
}

The following patterns are considered problems:

// in my-project/entry.ts
import {settings} from "my-project/packages/package-one/internal-file-one";
import reducer from "my-project/packages/package-two/internal-file-two";
export * from "/packages/package-two/internal-file-two";
// in my-project/packages/package-two/index.ts
import {settings} from "my-project/packages/package-one/internal-file-one";

The following patterns are NOT considered problems:

// in my-project/packages/package-two/index.ts
import reducer from "my-project/packages/package-two/internal-file-two";
// in my-project/packages/package-one/index.ts
import { settings } from "my-project/packages/package-two;
import { settings } from "my-project/packages/package-two/index.ts;
// in my-project/entry.ts
import * from "my-project/packages/package-one;

Contributing

This projects uses Yarn Modern and Corepack. To install the project for development, you must first make sure corepack is enabled, run:

corepack enable

You can then run yarn && yarn bootstrap. The bootstrap command will configure git hooks.

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