ratel

A command-line interface for ratel-core, a JavaScript to JavaScript compiler written in Rust.

Usage

ratel [options]
ratel --version

Options:
  -h --help                       Show this screen.
  --version                       Show version.
  -e STRING, --string=STRING      Specifies an input string.
  -f FILE, --file=FILE            Specifies the input file.
  -o FILE, --output=FILE          Specifies the output file.
  --pretty                        Don't minify the output.
  --ast                           Print out the Abstract Syntax Tree of the input.

Installing as cli executable

You can install the executable globally from NPM using npm install -g ratel or by executing npm link in the project directory.

Development

Running the tests

Runs all tests using Mocha.

The test suite is using node.green's compat-table which features ES2015, ES2016 and ES2017 examples.

$ npm test

Additionally, you can execute make in the project directory in order to validate the source code. Please also refer to the scripts section of package.json for further options.

Currently, ratel-core is provided as git submodule for development purposes.

compat-table tests

Run the following command to execute all bundled tests and write the original sources, errors and results to the results directory:

$ node write_errors.js

API

import Ratel from 'ratel';
const instance = new Ratel();

instance.getVersion()

Returns a string containing the application's version.

instance.getUsage()

Returns a string containing usage information.

instance.process(Object options)

Transpiles the given input, returns optionally a string.

options is an object which can take the following values:

key	type	purpose
file	String	Input path.
ast	Boolean	Whether to return the AST.
output	String	Output path.
string	String	Input string.

instance.ratel

Reference to the rust module implementing the following methods:

instance.transform(String string, Boolean minify)

Returns a string.

Transforms the given input string into ES5 code. When minify is set to true, the output string will be minified.

instance.parse(String string)

Returns a String with the AST of the given input string.

Changelog

0.0.6

• Ensuring trailing newlines

0.0.5

• Updating tests
• Removing compat-table transform tests (for now)
• Adding tests for transform, pretty printing
• Writing original sources, errors and results in write_errors

0.0.4

• Renaming to ratel
• Updating to ratel-core 0.2.3
• Updating documentation
• Updating project dependencies

0.0.3

• Updating to HoneyBadger 0.2.1
• Updating documentation
• Ensuring a trailing newline using -e/--string

0.0.2

• Updating to HoneyBadger 0.2.0
• Updating documentation
• Adding -e/--string to provide a string
• Adding stand-alone executable
• Adding unit tests
• Adding tests from node.green's compat-table
• improved API

Licenses

• MIT
• Apache License Version 2.0