TSLint Rule to forbid imports in certain paths

A tslint rule to forbid imports of certain RegExes in specified paths. It is not related to but inspired by https://github.com/electroma/tslint-forbidden-imports. I did not use electroma as it does not have support for relative typescript paths1 e.g. tsconfig.json:

"paths": {
      "@shortcutToPath/*": ["./my/very/much/to/long/path/*"]
}

Usage

• Add rule as dev dependency:

yarn add -D forbidden-imports-tslint

Assuming you have the following file structure:

• my-client
• client-common
  • components
  • directives
  • services
• other-client

And the following paths are defined in your tsconfig.json:

"paths": {
      "@someOtherClient/*": ["./other-client/*"],
      "@myClient/*": ["./my-client/*"],
}

If you want to forbid each of the clients to import components from the other client and also want to forbid the common components and directives to import (unshared) components from the clients while common services have no import restriction. Define the following rule in your tslint.json:

{
  "rulesDirectory": [
    "node_modules/forbidden-imports-tslint/src"
  ],
  "rules": {
    "forbidden-imports": [true,
      {
        "my-client": ["@someOtherClient*"],
        "other-client": ["@myClient*"],
        "client-common/components": ["@someOtherClient*", "@myClient*"],
        "client-common/directives": ["@someOtherClient*", "@myClient*"]
    
      }
    ]
  }
}

• Run tslint. In Angular you can use ng lint.

Development

To adapt this custom TSLint rule

• install Typescript globally yarn global add typescript
• adapt the forbiddenImportsRule.ts
• compile it to JS -> yarn build