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Description

Prism is a Design System code generator developed by the team at Gett 🚕.

Synchronizing design teams with engineering teams is a huge challenge.

As teams scale, new growing pains start around how to properly align colors, text styles and other design details between teams, in a uniform way, from a single source of truth.

Prism was built to solve this very problem! It takes a Zeplin project as input, and generates any output code you want from a project's styleguide based on a set of templates in your project, resulting in cross-platform code that is always synchronized from a single source-of-truth (Your project's Zeplin Styleguide).

Prism is especially useful when used in your CI/CD process to remove the friction of design handoff and review, and making sure all of your teams are properly synchronized in regards to naming, values, and more.

Programming language: Swift
License: MIT License
Latest version: v0.6.0

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README

Prism is a Design System code generator developed by the team at Gett 🚕.

Synchronizing design teams with engineering teams is a huge challenge.

As teams scale, new growing pains start around how to properly align colors, text styles, spacing and other design details between teams, in a uniform way, from a single source of truth.

Prism was built to solve this very problem! It takes a Zeplin project or styleguide as input, and generates any output code you want from these based on a set of templates in your project, resulting in cross-platform code that is always synchronized from a single source-of-truth (Your project's Zeplin Styleguide or Project).

Prism is especially useful when used in your CI/CD process to remove the friction of design handoff and review, and making sure all of your teams are properly synchronized in regards to naming, values, and more.

Getting Started

📹 Videos

🌈 Getting Prism

There are four options to install prism:

  1. Install with Homebrew: brew install GettEngineering/tap/prism
  2. Install using Mint: mint install GettEngineering/Prism
  3. Build from source: make install
  4. Run directly with SPM: swift run prism generate

🔑 Getting a Zeplin API Token

To use Prism, you'll need to generate a Personal Access Token (JWT) to Zeplin's API by going to https://app.zeplin.io/profile/developer and click the Create new token button in the Personal access tokens section:

[Generating a Zeplin Personal Access Token](Assets/gh/pat.png "Generating a Zeplin Personal Access Token")

You'll need to expose this token to run the prism CLI tool. Make sure you have a ZEPLIN_TOKEN environment variable with your token configured.

When running prism in a CI environemnt, we recommend adding ZEPLIN_TOKEN as an Environment Secret.

When using prism locally or bootstrapping your project for the first time, you can simply run export ZEPLIN_TOKEN='zeplin_personal_token' before running prism locally.

👢 Bootstrap Prism for your Project

Inside your project folder, run prism init.

It will guide you through selecting a Zeplin project or styleguide as source along with other useful information for proper code generation. Once prism init is successful, you'll find a new .prism folder with a config.yml file outlining your preferences.

🎨 Creating Templates

Prism uses templates with the .prism suffix located in your project's .prism folder. These Prism templates are basically plain text files — Prism doesn't really care what format or language you use, it can make any kind of output as long as you can express it in a Prism template file.

Prism looks for something called [Tokens](Documentation/Tokens.md) inside your templates. These tokens follow the following format: {{%token%}}. You can find a couple of sample templates in the Examples folder.

Here are two short example of generating colors code for iOS and Android using Prism templates.

Colors.swift.prism:

[Color.swift iOS Prism Template](Assets/gh/Colors-iOS.gif "Color.swift iOS Prism Template")

colors.xml.prism:

[Color.swift Android Prism Template](Assets/gh/Colors-Android.gif "Color.swift Android Prism Template")

Running on Windows (Experimental)

Due to the official release of Swift for Windows, an experimental build of prism is now available for Windows.

You'll need to install a few dependencies before running for the first time:

Note: Building from source is somewhat more involved. Let me know if you're interested in doing so and I'll do my best to assist.

Development

  • Run make or make install to build a release binary of the prism CLI tool and install it to /usr/local/bin.
  • Run make build to build a release binary of the prism CLI tool
  • Run make project to create an Xcode project and start working.
  • Run make test to run all tests.
  • Run make clean to clear the generated Xcode project.