Somtimes generating inline imports for d.ts files instead of using globally imported symbols

[CarstenLeue]

TypeScript Version: typescript@3.2.4
I cannot use a more recent version, since I am using the Angular build process that requires >=3.1.1 <3.3.

I am opening this issue as requested by defect
microsoft/rushstack#1067

The problem looks related to #25511 but that issue has been closed, still the problem persists for me.

Problem statement:

The d.ts file generated during my compile step looks like this:

export declare const authContentFeatureReducer: {
    [AUTH_CONTENT_FEATURE]: import("redux").Reducer<Record<string, import("@ibm-wch-sdk/api").AuthoringContentItem>, import("..").PayloadAction<string> | import("..").PayloadAction<import("@ibm-wch-sdk/api").AuthoringContentItem>>;
};

It references types from other modules via inline import statements. This causes a problem when generating documentation via the https://www.npmjs.com/package/@microsoft/api-documenter tool, because these inline import statements appear as is in the generated documentation. Instead of just the types they point to. This renders the documentation basically unreadable.

Expected behaviour
I would expect output similar to this:

import { Reducer } from 'redux';
import { AuthoringContentItem} from '@ibm-wch-sdk/api';
import { PayloadAction } from '..'

export declare const authContentFeatureReducer: {
    [AUTH_CONTENT_FEATURE]: Reducer<Record<string, AuthoringContentItem>, PayloadAction<string> | PayloadAction<AuthoringContentItem>>;
};

The actual source code looks like this:

import { authoringContentReducer } from './auth.content.reducer';

export const AUTH_CONTENT_FEATURE = 'authContent';

export const authContentFeatureReducer = {
  [AUTH_CONTENT_FEATURE]: authoringContentReducer
};

[RyanCavanaugh]

We intentionally don't synthesize imports; writing an inline import is more predictable on our end and doesn't require any name collision logic.

If you add those imports to the file yourself, they'll be used, so I'd recommend doing that.

[typescript-bot]

This issue has been marked 'Working as Intended' and has seen no recent activity. It has been automatically closed for house-keeping purposes.