Tofu

Tofu is an easy-to-use, open-source, two-factor authentication app designed specifically for iOS, made by Calle Luks. I adopted it after migrating from Authy, and ended up overhauling its icon system. It's a really well designed app:

When I migrated to Tofu, it had a limited number of hand-designed icons in one big Sketch file.

Ye olde Sketch file

Each icon was created and exported manually: I set out to simplify the process.

"Hello, good sir, may I simplify some processes?"

Calle proposed we create a shell script to generate icons on-demand from a folder of pngs. I got my shell hat on and a week later, my pull request was commited to upstream with a brand new bash script. The script iterates over a given directory using `sed` and regex to grab the names of each png inside and add them to Xcode's assets folder. It uses a heredoc as a template for the new imageset's JSON, and the `sips` cli to generate properly sized icons for use in the app.

My pull request

Contributing to open source projects is incredibly fun. If you've got a free weekend, take some time to hack on your favorite codebase. Big thanks to Calle for creating such an awesome app – I look forward to collaborating more in the future.

Download Tofu on the App Store

Explore the source on GitHub

Check out Calle Luks