Can't load CSS modules from node modules

[rorticus]

Bug

It looks like you can't build code that imports CSS modules that aren't in the src/ directory. I think it's a problem with src/loaders/css-module-dts-loader/loader.ts#getCssImport.

This was discovered while looking into dojo/meta#138 .

Code

import * as localStyles from './some/local/file.m.css';
import * as foreignStyles from '@dojo/widgets/common/styles/base.m.css';

You can error when running dojo build.

Expected behavior:

I expect it to build 😄

Actual behavior:

(node:28421) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): Error: ENOENT: no such file or directory, stat '/Users/rorymulligan/Desktop/dojo2/examples/todo-mvc/src/@dojo/widgets/common/base.m.css