パスワード生成

// pwgen.js

module.exports = async function(context) {
    const length = parseInt(context.args[0]) || 16;
    const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_+";
    let ret = "";
    for (let i = 0, n = charset.length; i < length; ++i) {
        ret += charset.charAt(Math.floor(Math.random() * n));
    }
    return { password: ret };
};