wasm-ide

wasm-ide is a browser-based IDE for competitive programming, built on top of WebAssembly. It compiles and runs code inside a Web Worker, stores workspaces in the browser filesystem, and can optionally integrate with remote evaluation and contest systems.

How to build

First install rustup and make sure ~/.cargo/bin is in your PATH.

Then install the required Rust tooling:

rustup target add wasm32-unknown-unknown
cargo install --locked trunk

You also need these tools available in PATH:

• npm
• jq
• brotli

Runtime configuration is loaded from config.json. If that file is missing, the build falls back to config.example.json.

The main configuration keys are:

• default_ws: files created for a new local workspace
• remote_eval: optional remote evaluation endpoint
• terry: optional contest-system endpoint

Compiler artifacts must be downloaded from olimpiadi-informatica/wasm-compilers and placed in ./compilers. The build expects the .tar.br files there.

Then build the project with:

trunk build --release

How to serve

The app requires COEP and COOP headers.

A minimal nginx configuration for serving the generated dist/ directory is:

server {
    listen 80;
    server_name _;

    root /path/to/wasm-ide/dist;
    index index.html;

    add_header Cross-Origin-Embedder-Policy require-corp;
    add_header Cross-Origin-Opener-Policy same-origin;

    location / {
    }

    location /compilers/ {
        brotli_static on;
    }
}

brotli_static on; is useful if you want nginx to serve precompressed compiler archives directly.