ComputerCraft LUA veeery simple preprocessor

--[[
    CCLUA prepocessor

    This can be ported to vanilla LUA very simply

    ~Piorjade

]]

local arguments = {...}

if #arguments ~= 1 then
    print("Usage: prepoc <file> <outputName>")
end

local currentLine
local fileData = "---Processed with LUAPreProc---"
local file = fs.open(arguments[1], "r")
repeat
    currentLine = file.readLine()
    if currentLine ~= nil and currentLine:sub(1, 3) == "--#" then
        local command = currentLine:sub(currentLine:find("%b[]"))
        if command == "[include]" then
            local argument = currentLine:sub(14, #currentLine)
            local argumentFile = fs.open(argument, "r")
            print("Including: "..tostring(argument))
            local argumentData = argumentFile.readAll()
            argumentFile.close()
            fileData = fileData.."\n"..argumentData
        end
    elseif currentLine ~= nil then
        fileData = fileData.."\n"..currentLine
    end
until currentLine == nil
file.close()
local file = fs.open(arguments[1], "w")
file.write(fileData)
file.close()