优化electron-forge发布的应用安装时两次打开应用

// 放在最上面
if (handleSquirrelEvent()) {
    // squirrel event handled and app will exit in 1000ms, so don't do anything else
} else {
    // createWindow...
}

function handleSquirrelEvent() {
    if (process.argv.length === 1) {
        return false;
    }

    const squirrelEvent = process.argv[1];
    switch (squirrelEvent) {
        case "--squirrel-install":
        case "--squirrel-updated":
            // Optionally do things such as:
            // - Add your .exe to the PATH
            // - Write to the registry for things like file associations and
            //   explorer context menus

            setTimeout(app.exit, 1000);
            return true;

        case "--squirrel-uninstall":
            // Undo anything you did in the --squirrel-install and
            // --squirrel-updated handlers

            setTimeout(app.exit, 1000);
            return true;

        case "--squirrel-obsolete":
            // This is called on the outgoing version of your app before
            // we update to the new version - it's the opposite of
            // --squirrel-updated

            app.exit();
            return true;
    }
}

function checkIsSetup() {
    if (process.argv.length === 1) {
        return false;
    } else {
        const squirrelEvent = process.argv[1];
        switch (squirrelEvent) {
            case "--squirrel-install":
            case "--squirrel-updated":
            case "--squirrel-uninstall":
            case "--squirrel-obsolete":
                app.exit();
                return true;
        }
    }
}