fx_cast/app/bin/install-manifest.js

const fs = require("fs-extra");
const os = require("os");
const path = require("path");
const minimist = require("minimist");

const paths = require("./lib/paths");


const argv = minimist(process.argv.slice(2), {
    boolean: [ "remove" ]
  , default: {
        remove: false
    }
});


const CURRENT_MANIFEST_PATH = path.join(paths.DIST_PATH, paths.MANIFEST_NAME);


if (!fs.existsSync(CURRENT_MANIFEST_PATH) && !argv.remove) {
    console.error("No manifest in dist/app/ to install.");
    process.exit(1);
}


const platform = os.platform();
const arch = os.arch();

switch (platform) {
    case "darwin":
    case "linux": {
        // Manifest location within home directory
        const destination = path.join(os.homedir(), platform === "linux"
            ? ".mozilla/native-messaging-hosts/"
            : paths.getManifestPath(platform, arch));

        if (argv.remove) {
            fs.remove(path.join(destination, paths.MANIFEST_NAME));
            break;
        }

        // Install manifest
        fs.ensureDirSync(destination);
        fs.copyFileSync(CURRENT_MANIFEST_PATH
              , path.join(destination, paths.MANIFEST_NAME));

        break;
    };

    case "win32": {
        const { Registry } = require("rage-edit");
        const REGISTRY_PATH = `HKCU\\SOFTWARE\\Mozilla\\NativeMessagingHosts\\${paths.REGISTRY_KEY}`;

        if (argv.remove) {
            Registry.delete(REGISTRY_PATH);
            break;
        }

        Registry.set(
                REGISTRY_PATH
              , ""
              , CURRENT_MANIFEST_PATH
              , "REG_SZ");

        break;
    };

    default: {
        console.error("Sorry, this installer does not yet support your OS");
        process.exit(1);
    }
}