build-on-demand.mjs

// Copyright © SixtyFPS GmbH <info@slint.dev>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0

// This file checks if a binary package was installed (through architecture dependencies), and
// builds slint if no binary was found.

import { Worker } from "node:worker_threads";
import { spawn } from "node:child_process";

const worker = new Worker("./rust-module.cjs");
// Define dummy error handler to prevent node from aborting on errors
worker.on("error", (error) => {
    console.log(`Error loading rust-module.cjs: {error}`);
});
worker.on("exit", (code) => {
    if (code !== 0) {
        console.log("slint-ui: loading rust-module.cjs failed, building now");
        spawn("npm", ["run", "build"], {
            stdio: "inherit",
        });
    }
});