Running osmtogeojson in Gulp

[sharpchi]

Hi, I'm trying to incorporate osmtogeojson in a Gulp toolchain, and am having difficulty getting osmtogeojson to read the input files using Gulp's pipe function.

I'm trying this code:

which is pretty much the process I'd use to uglify some javascripts. But I get the following error:

I appreciate that this wasn't designed to work with Gulp, but hope someone who's more familiar with Gulp, might be able to point me in the right direction.

many thanks