Typescript prevent imports from certain directory in project

Question

I wonder if there is a way to prevent all files in a certain scope from importing any file from a different second scope. Example:

Given this project structure:

project/
├── node_modules/
├── test/
├── src/
│   ├── domain/
│   │   ├── SomeModelClass.ts
│   ├── application/
│   │   ├── SomeApplicationConcern.ts
│   ├── database/
│   │   ├── SomeRepository.ts
├── tsconfig.json
└── tslint.json

I would like to enforce at least some of these rules:

• SomeApplicationConcern can import code from anywhere.
• SomeRepository can not import code from application
• SomeModelClass can not import code from neither application nor domain.

Can it be achieved somehow using nested tsconfig.json files?
Can it be achieved using some fancy tslint rules?

I have no clue if anything like this is possible. I would like to get a compilation error (or tslint error, which is set to error severity in my project) if a forbidden dependency is detected.

Answer 1

It sounds like Dependency Cruiser is the tool you're looking for. You can put together any arbitrary rules you want with it, run it during your build process, and it'll automatically report dependency violations. It supports typescript, javascript, commonjs, es6 modules, and more.

I've actually been looking for an answer to this exact question for a while, and it wasn't until recently that I've stumbled upon this tool. Hopefully others can find it useful too.