NOTE: This is a fork because the OG is no longer installable via npm and doesn't seem to be getting updated.
In this fork, we've updated the version of spritezero the same as this open PR https://github.com/mapbox/spritezero-cli/pull/28
spritezero-cli
A command-line interface to spritezero.
Installation
npm install -g @streetcredlabs/spritezero-cli
Usage
spritezero [output filename] [input directory]
--retina shorthand for --ratio=2
--ratio=[n] pixel ratio
--unique map identical images to multiple names
Spritezero reads an input directory containing SVG files and generates a JSON layout file and PNG spritesheet.