Source maps from jade file and to web.server/app.js file

[JacquesRobin]

I am not sure whether:

• this project is still alive or not, and
• if the package works as I suppose it does, i.e., by first generating a spacebar file and then reusing Blaze's spacebar to JS generator.

But if the answer to both those interrogations are positive, then it would be awesome to:

• write the intermediate spacebar file somewhere into the .meteor folder
• generate a jade2spacebar.map source map file tracing the correspondence between the source jade file lines to the intermediate spacebar file lines
• generate a spacebar2js.map source map file tracing the correspondence between the intermediate spacebar file lines to the web.browser/app.js file served to the browser (though that should probably belong as a feature request on the blazejs project rather than here)
• reusing the two other maps above to generate a jade2js.map source map tracing the correspondence between the source jade file and the web.browser/app.js file served to the browser.

This would allow one to write extensions for IDEs such as WebStorm and VSCode allowing to put breakpoints in jade templates, which would greatly speed-up debugging of jade-meteor apps with beyond toyish trivial UI components.