Generate declaration map

[donmahallem]

What do you think about providing an option to output sourcemaps for the bundled typings?

[timocov]

Even though I cannot imagine use case for that (maybe you can provide?) I don't mind to have such option.

[timocov]

At the moment I see at least 1 problem that might blocks the implementation here - the process how the library achieves the bundling. It compiles the code to .d.ts first and then works with that d.ts. files only (no information about the original sources files at that point). So it needs to be provided somehow the original place of any statement so we can refer to them. Not sure if the compiler provides this API though.

[Zamiell]

If the compiler doesn't provide the API, you can always just invoke tsc and copy it from the generated output.

[bigopon]

Just in case it helps motivate you @timocov in anyway: this is a necessary feature in monorepo setup, si ce you wanna jump back to the source code rather than the typing file when navigating across packages in a monorepo.