[bug] Declaration files not generated for files with only interfaces/no javascript.

[superamadeus]

Due to some long-standing issue with awesome-typescript-loader:

s-panferov/awesome-typescript-loader#411
s-panferov/awesome-typescript-loader#428
s-panferov/awesome-typescript-loader#432

Files with no javascript-producing code are omitted from the declaration file process. For example:

Case 1:

// src/color-interface.ts
export interface ColorInterface {
   r: number;
   g: number;
   b number;
}

// src/color.ts
import { ColorInterface } from './color-interface';

export class Color implements ColorInterface {
   r: number;
   g: number;
   b number;
}

Case 2:

// src/color-interface.ts
export interface ColorInterface {
   r: number;
   g: number;
   b number;
}

export var __WORKAROUND = 1;

// src/color.ts
import { ColorInterface } from './color-interface';

export class Color implements ColorInterface {
   r: number;
   g: number;
   b number;
}

In Case 1, types/color-interface.d.ts is not generated, but types/color.d.ts is generated. Furthermore, types/color.d.ts contains a non-resolvable reference to ./color-interface.

In Case 2, both types/color-interface.d.ts and types/color.d.ts are generated and everything works as expected.

This occurs silently-- webpack throws no errors when building the library, but errors appear when trying to use the library from a consuming project:

// main.ts
import { Color } from 'my-library';

let color = new Color();

ERROR in [at-loader*] ./node_modules/my-library/dist/types/color.d.ts:1:31
    TS2307: Cannot find module './color-interface'.

*note that the error above mentions at-loader, this is just because I happen to be using at-loader in my other project. The error is due to the fact that types/color-interface.d.ts does not exist.

Probable fix (not sure of other implications, haven't tested):

• switch from awesome-typescript-loader to ts-loader
• install babel-loader
• add babel-loader to /\.ts$/ rule before ts-loader (like so)

  module: {
          rules: [
              {
                  test: /\.ts$/,
                  use: [
                      {
                          loader: 'babel-loader'
                      },
                      {
                          loader: 'ts-loader',
                      }
                  ]
              }
          ]
      },

• change declarationDir in tsconfig.json to types (as tsloader appears to use the provided path relative to the webpack config's output.path)

Again, this needs testing. I'll do a pull request shortly.

[alexjoverm]

Forgot to close this issue...

Thanks @superamadeus! This is how it was at the beginning, switched to awesome-typescript-loader for same reasons (bugs) but seems now that ts-loader got better :)

[alexjoverm]

Somehow I got confused and thought this was fixed

[alexjoverm]

Fixed by 75dd59b. Now there is no more loaders for TypeScript compiling :)