prettier-plugin-monkey

A Prettier plugin for the Monkey programming language.

Features

• 🚀 Fast parsing using WebAssembly (powered by @gengjiawen/monkey-wasm)
• 🎨 Automatic code formatting
• 🔧 Configurable formatting options
• 📦 Easy integration with existing Prettier setups

Installation

npm install --save-dev prettier prettier-plugin-monkey
# or
yarn add -D prettier prettier-plugin-monkey
# or
pnpm add -D prettier prettier-plugin-monkey

Usage

With Prettier CLI

prettier --write "**/*.monkey"

With .prettierrc

{
  "plugins": ["prettier-plugin-monkey"],
  "printWidth": 80,
  "tabWidth": 2
}

Programmatic API

import prettier from 'prettier';

const code = `
let add = fn(a, b) {
a + b
};
`;

const formatted = await prettier.format(code, {
  parser: 'monkey',
  plugins: ['prettier-plugin-monkey'],
});

console.log(formatted);

Supported File Extensions

• .monkey

Configuration Options

This plugin supports all standard Prettier options:

• printWidth (default: 80)
• tabWidth (default: 2)
• useTabs (default: false)
• trailingComma (default: "none")
• bracketSpacing (default: true)

Notes:

• Monkey strings currently use double quotes only, so singleQuote is intentionally ignored.

Examples

Before

let fibonacci=fn(x){if(x==0){0}else{if(x==1){return 1;}else{fibonacci(x-1)+fibonacci(x-2);}}};

After

let fibonacci = fn(x) {
  if (x == 0) {
    0
  } else {
    if (x == 1) {
      return 1;
    } else {
      fibonacci(x - 1) + fibonacci(x - 2);
    }
  }
};

Development

# Install dependencies
npm install

# Build the plugin
npm run build

# Run tests
npm test

# Watch mode for development
npm run dev

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

MIT

Related Projects

• monkey-rust - Monkey interpreter in Rust
• @gengjiawen/monkey-wasm - Monkey parser WASM package
• Writing An Interpreter In Go - The original Monkey language book