Userscripts : Includes Checker

(function () {
    var re = /^\/\/ @require\s+[\w:\.\/]*\/(\d+)\.user\.js/gim,
    text = GM_info.scriptMetaStr,
    warn = [],
    includes = {};

    try {
        includes = JSON.parse(GM_getResourceText("includes"));
    } catch (e) {
        GM_log("Resource INCLUDES does not exist or is malformed.");
    }

    while (re.exec(text)) {
        var a = RegExp.$1;
        if (a in includes) {
            var i = includes[a].test;

            (function recursive (parent, index) {
                if (index < i.length) {
                    if (parent[i[index]]) {
                        recursive(i[index], ++index);
                    } else {
                        warn.push([i.slice(0, 1 + index).join("."), index, a]);
                    }
                }
            }(this, 0));
        } else {
            GM_log("#" + a + " is not being managed.");
        }
    }

    if (warn.length) {
        alert("[" + GM_info.script.name + "]\nThe installation was succeeded but the required files are missing:\n" + warn.map(function (a) {
            return "#" + a[2] + "\t\t" + a[0];
        }).join("\n") + "\n\nPlease try installing again later.");
    }
}());