Java Coalescer for CodinGame challenges

CodeMasher is a tool that allows you to code in Java using multiple class files, like a normal app would, when working on CodinGame bot challenges.

It constantly observes a given directory for changes. It automatically and properly coalesces all classes. The tool is also a webserver that only serves the last fully coalesced file that successfully compiled.

On the actual CodinGame bot IDE page you need to use the CodeMasherLoader (Chrome extension) to update the code automatically.

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Run it!

If you want to run from source on any platform, you need at least Java 19.

./run/run code codemasher -w WATCHED_DIR

WATCHED_DIR Directory where your source code resides. For example, the src directory in a project generated by your IDE.

Use -h to see other options.

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Example

Example minimal Player.java:

class Player implements Runnable {
    // [[CM::UPDATESTAMP]]

    public static void main(final String[] args) {
        final Player player = new Player();
        player.run();
    }

    // [[CM::CODE]]

    @Override
    public void run() {
        // TODO: Your code here.
    }
}

Note the two CM comments:

• [[CM::UPDATESTAMP]] Gets replaced by the time at the moment of coalescing and an ASCII graphic that makes it evident that the file has changed.

• [[CM::CODE]] This must exist! This is the point where all your other classes are injected. Your classes will automatically be made static, and all imports will be correctly added, with no duplicates, at the top of the generated file.