Publish a Package

Build a small library from scratch — palette, a color type that parses and formats hex colors — then publish it to the registry so anyone can depend on it. Along the way you'll pick up the things that make a package good to use: a tight public API, doc comments, and semantic versioning.

Before you start

You should have installed Kestrel, worked through a tour, and built something with Flock (flock build/run). This guide assumes you're comfortable with structs, match, and Optional. To publish, you'll also need a GitHub account — that's how the registry signs you in.

What you'll build

A tiny library, palette, with one public type:

let blue = Color(red: 58, green: 123, blue: 213);
blue.toHex();                  // "#3a7bd5"

match Color(hex: "#3a7bd5") {
    .Some(c) => c.red,         // 58
    .None    => 0
}

By the end it's published as your-name/palette and a second project depends on it.

Publish a Package

Before you start

What you'll build

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