Простая библиотека которая экспортирует переменные LUA в формат JSON

Пример использования:

local tojson = require "tojson"
print(tojson(os))

Код самой библиотеки tojson

tojson.lua

function fromArray(obj, recru)
    local result = "["
    for i = 1,#obj do
        if not recru and type(obj[i]) == "table" then
            result = result .. '"' .. tostring(obj[i]) .. '",'
        else
            result = result .. toJson(obj[i], recru) .. ","
        end
    end
    return string.sub(result, 1, #result-1) .. "]"
end
 
function fromObject(obj, recru)
    local result = "{"
    for k, v in pairs(obj) do
        if not recru and type(obj[i]) == "table" then
            result = result .. toJson(k) .. ':"' .. tostring(v) .. '",'
        else
            result = result .. toJson(k) .. ":" .. toJson(v, recru) .. ","
        end
    end
    return string.sub(result, 1, #result-1) .. "}"
end
 
function isAssoc(obj)
    local n = 1
    for k in pairs(obj) do
        if k ~= n then
            return false
        end
        n = n + 1
    end
    return true
end
 
function toJson(any, recru)
    local atype = type(any)
    recru = recru == nil and true or recru
    if atype == "string" then
        return '"' .. any .. '"'
    elseif atype == "number" then
        return tostring(any)
    elseif atype == "table" then
        if isAssoc(any) then
            return fromArray(any, recru)
        else
            return fromObject(any, recru)
        end
    elseif atype == "nil" then
        return "NULL"
    elseif atype == "boolean" then
        return any and "true" or "false"
    else
        return '"' .. tostring(any) .. '"'
    end
end
 
return toJson