--command line matching

local line = [[mycmd hey arg2 arg3 "non space separated arg" 'arg with a quote " ']]
local args = {}

local temp = ""
local q = false
line = line .. " "
for char in line:gmatch("(.)") do
    local write = false

    if
        char == [[']] or
        char == [["]]
    then
        if not q then
            q = char
            char = ""
        elseif q == char then
            q = false
            write = true
            char = ""
        end
    end

    if q then
        temp = temp .. char
    elseif char:find("%s") then
        write = true
        char = ""
    else
        temp = temp .. char
    end

    if write and temp ~= "" then
        table.insert(args, temp)
        temp = ""
    end

end

table.foreach(args, print)