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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.
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.
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.