How can I tweak this function?

What I want is to have the line:

repeat wait() until _G.engyn_s _G.engyn_s()

-at the beginning of the script and load in all the functions below within the script to a table. So far, it only works when the functions are above the repeat block but how can I make it so that I can allow the repeat block to be placed at the top of the script and still be able to load all functions within it?

Script Server

_G[ROOT.Name:lower() .. "_s"] = function(...)
    local Documents = ROOT_LIB.Documents;

    local env = getfenv(2);

    local App = {
        Environment = {
            out = function(...)local info = {...};for i, v in pairs(info) do        print("Engyn("..env["script"]:GetFullName()..") :: "..tostring(v));end end;
            include = coroutine.wrap(function(...)
                local function getDoc(id)
                    return Documents[id];
                end

                local function loadDoc(doc)
                    for i, v in pairs(doc.Environment) do
                        if (type(v) == "function") then
                            if (not env[i]) then
                                env[i] = v;
                            end
                        end
                    end
                end

                for _, id in pairs({...}) do
                    local doc = getDoc(id);
                    if (doc) then
                        loadDoc(doc);
                    else
                        if (not getDoc(id)) then
                            repeat
                                wait()
                            until getDoc(id);
                        else
                            return true;
                        end
                    end
                end
            end);
        };
    }

    local Meta = {
        __index = {
            init = function(this, env)
                --Transfer all functions to environment
                for i, v in pairs(env) do
                    if (type(v) == "function") then
                        this.Environment[i] = v;
                    end
                end
            end;
        };
        __call = function(this, args)

        end;
    }

    App.New = function(env, ...)
        local app = setmetatable(App, Meta);
        app.script = env["script"];

        app:init(env);
        app({...});
        return app;
    end

    Documents[env["script"].Name] = App.New(env, ...);

    for i, v in pairs(App.Environment) do
        env[i] = v;
    end

    return Documents[env["script"].Name];
end

Script a

repeat wait() until _G.engyn_s _G.engyn_s();

include("b");

sayHi();

Script b

function sayHi()
    print("Hi!");
end

repeat wait() until _G.engyn_s _G.engyn_s();