Issues with sourceMap

[aMarCruz]

Hi @sidorares ,

I made a little tool (gen-pug-source-map), based on your idea for generating source maps for Pug v2.x

My implementation solves some issues present in yours:

• Each source file (included and extends) are readed from the file system multiple times, gen-pug-source-map does not read from the file system.
• Absolute filenames in the property sources can hinder remote debugging.
• In some cases, line numbering is shifted

Also, you can get the compiled code from gen-pug-source-map with inline templates removed.

If you want test it, please clone my repo, run npm i && npm t and go to http://sokra.github.io/source-map-visualization/#custom, click "Custom..." and upload test/output/app1.js, then load test/output/app1.map.js and try.

Thanks.