gem-hunter

runzod

Features

Installation

pnpm dlx runzod <path-to-your-code>

Usage

runzod <directory> [options]

Options

Examples

# Transform all TypeScript files in the src directory
pnpm dlx runzod ./src

# Dry run to see what would be changed
pnpm dlx runzod ./src --dry

# Transform only specific file extensions
pnpm dlx runzod ./src --extensions ts,tsx

# Show verbose output
pnpm dlx runzod ./src -v

Transformations

Examples

Basic Usage

// Before (runtypes)
import { String, Number, Boolean, Array, Object, type Static } from "runtypes";

const User = Object({
  name: String,
  age: Number,
  isActive: Boolean,
  tags: Array(String),
});

type User = Static<typeof User>;

if (User.guard(data)) {
  console.log(`User ${data.name} is ${data.age} years old`);
}

// After (zod)
import { z } from "zod";

const User = z.object({
  name: z.string(),
  age: z.number(),
  isActive: z.boolean(),
  tags: z.array(z.string()),
});

type User = z.infer<typeof User>;

const result = User.safeParse(data);
if (result.success) {
  console.log(`User ${result.data.name} is ${result.data.age} years old`);
}

Branded Types

// Before (runtypes)
import { String, withBrand, type Static } from "runtypes";

const UserId = String.withBrand("UserId");
type UserId = Static<typeof UserId>;

// After (zod)
import { z } from "zod";

const UserId = z.string().brand("UserId");
type UserId = z.infer<typeof UserId>;

Limitations

Post-Migration Steps

Development

# Install dependencies
npm install

# Build the project
npm run build

# Run tests
npm test

# Run tests in watch mode
npm run test:watch

# Test on example files
npm run test:codemod

License