full source map support

[jonathanong]

i.e. without the sourceURL crap that barely even works. each file should have a file.map() method or something that you can pass a source map into. then the builder will handle the source mapping itself. maybe file.map(false) to denote that there is no source map, i.e. regenerator

[frankwallis]

There may be an easier way to do this which is to use vinyl-sourcemaps-apply (similar approach to gulp-sourcemaps).

So it becomes the responsibility of each transform which changes the name and structure of a file to register the source map with vinyl-sourcemaps-apply.

component-builder would need to generate a source map for its concatenation step

component-build could do the vinyl-sourcemaps-apply.init() and vinyl-sourcemaps-apply.write() and vinyl will take care of merging all the source maps into a single one. When using gulp-component-build it would all work as normal with gulp-sourcemaps.

I had a look at how I could implement this in component-builder but it looks like quite a big change - interested to know you thoughts?

thanks