ts-alias-1

models.ts

import { protos } from './my_company_protos'

export type User = protos.user.User;

my_company_protos.ts

export namespace protos {
  export namespace user {
    export interface User {
      username: string;
      info: protos.Info.User;
    }
  }
  export namespace Info {
    export interface User {
      name: protos.Info.Name;
    }
    export interface Name {
      firstName: string;
      lastName: string;
    }
  }
}

ts-alias.ts

import ts from "typescript";

// hardcode our input file
const filePath = "./src/models.ts";

// create a program instance, which is a collection of source files
// in this case we only have one source file
const program = ts.createProgram([filePath], {});

// pull off the typechecker instance from our program
const checker = program.getTypeChecker();

// get our models.ts source file AST
const source = program.getSourceFile(filePath);

// create TS printer instance which gives us utilities to pretty print our final AST
const printer = ts.createPrinter();

// helper to give us Node string type given kind
const syntaxToKind = (kind: ts.Node["kind"]) => {
  return ts.SyntaxKind[kind];
};
// visit each node in the root AST and log its kind
ts.forEachChild(source, node => {
  console.log(syntaxToKind(node.kind));
});