sketchtool CLI with fish shell

I tried for a while to get the fish shell equivalent for the sketch cli initialization commands. Can anyone help?

For fish it the first line seems to work if you remove the '$' character. Second line for the argument passing I've tried removing the $, the quotes, & several different formats. Couldn't find documentation for argument passing initialization in fish.

#!/bin/sh

SKETCH=$(mdfind kMDItemCFBundleIdentifier == 'com.bohemiancoding.sketch3' | head -n 1)

# pass on all given arguments
"$SKETCH/Contents/Resources/sketchtool/bin/sketchtool""$@"

reference: https://developer.sketch.com/cli/