Filter not working as expected

[Arwid]

Thank you for this useful tool! Here's one issue I came across:

Problem
I expected this to work:

ncp 'public/', '.tmp',
    filter: new RegExp "/assets/(css|js)($|\/)"

But the filter seems to also be used to decide which directories to go into

public: # doesn't match regex, so the following tree isn't looked at:
- public/assets
- public/assets/css 
- public/assets/css/app.css # should match filter but it never gets here

Suggestion
Don't prune by using filter to decide which directories to go into. Only test filenames, as mentioned in the readme. Or add a note about this limitation.

[simonseyock]

Hey i solved this with new RegExp("/assets(/(css|js)($|\/)|$)")