CodinGame Runner

A command-line program to run your solutions locally, like on CodinGame !

Installation

cg-runner is a node.js application, so you'll need to install node (and npm which is a separated package on linux distributions) to run it.

Once you got them, open a terminal, and install it (only once, need network access):

npm install -g cg-runner

Then, use cg-runner command from your terminal.

Usage

Usage: cg-runner [options] <challenge>

Runs your algorithms like on cofingame.com.

Give the name of a challenge (located into challenges folder), and it will search for a sub-folder with that name containing a js file (same name) and a collections of fixtures.

Each fixtures is separated in two file (with the same name): X.in and X.out. Fixtures files are plain text files.

Example:

+ challenges
|--+ genome-sequencing
   |-- genome-sequencing.js
   |-- AACTT.in
   |-- AACTT.out
   |-- AGATTACAGA.in
   |-- AGATTACAGA.out

Supported languages (and their file extensions) are:

• JavaScript (.js)
• Python (.py)

Options:

• -h, --help output usage information
• -V, --version output the version number
• -f, --folder <folder> specify challenges folder (default to './challenges')
• -l, --langage <langage> langage of your solution (default to 'javascript')
• -t, --timeout <timeout> maximum timeout between each ouputs, in milliseconds (default to 300)
• -w, --watch does not quit and run again when challenge file changes

If you want to skip some fixtures, give your .in file another extension. If you want to test against only one fixture, use the .in.only extension.

The watch mode will ease your development, and you can now plug external debuging programs to your running algorithm.

Engines

Try to stick as much as possible to CodingGame versions and library. It will ease copy-pasting from and to the online IDE.

JavaScript (.js extension)

To run JavaScript, you need to download the proper build of SpiderMonkey, Mozilla's JS engine.

Choose the jsshell-XXX.zip file of your platform, and unzip it into the js-engine folder of cg-runner.

Python (.py extension)

You need to have an accessible python command on your environment. Goes to Pyhton download page, and follow instructions relative to your operating system.

Limitations and adaptations

Obviously, you can't simulate complex challenges like bots with a bunch of static input files. And you won't see beautiful CodinGame's animations. Take it as a simple way to debug locally your solutions on specific cases.

If the challenge contains a game loop, you need to reflect "turns" in your .in and .out fixtures by adding a blank line (no tabs, no space) between intput/output of different turns.

A practical example for a challenge expecting 2 inputs at each turns:

2
10 41

2
10 40

2
9 40

Cg-runner launches your algorithm in a separated process, using the relevant runtime (JavaScript, Phython, Java...).

As on CodinGame, it awaits on standard output stream, and consider standard error stream as debug information.

But the both streams are not synchronized, and you may received debug data mixed with output: order within each streams is garantee, but not across them.

TODO

• add tests
• support java, scala...