Command line argument parsing

cmd.lua

command_strings = {
    'php artisan make="hi mate" heh "I have a value"',
    "php artisan make:auth",
    [[I "am" 'the text' and "some more text with '" and "escaped \" text"]],
    [[1 2 word 2 9 'more words' 1 "and more" "1 2 34"]],
    [[omo "This is a string!" size=14 font="Comic Sans" break= hmm "thing and 'thing'" ]]
}

function command_parse(s)
    local t={}
    local n=0
    local b,e=0,0

    while true do
        b,e=s:find("%s*",e+1)
        b=e+1
        if b>#s then break end
        n=n+1

        local until_next_space = s:sub(b, s:find("%s",b))

        if until_next_space:find('="') then
            local equals = s:find('="', b)
            local endofstring = s:find('"', equals+2)

            t[s:sub(b, equals-1)] = s:sub(equals+2, endofstring-1)

            b, e = b, endofstring+1
        elseif until_next_space:find("='") then
            local equals = s:find("='", b)
            local endofstring = s:find('"', equals+2)

            t[s:sub(b, equals-1)] = s:sub(equals+2, endofstring-1)

            b, e = b, endofstring+1
        elseif s:sub(b,b)=="'" then
            b,e=s:find(".-'",b+1)
            table.insert(t, s:sub(b,e-1))
        elseif s:sub(b,b)=='"' then
            b,e=s:find('.-"',b+1)
            table.insert(t, s:sub(b,e-1))
        else
            b,e=s:find("%S+",b)
            local tmp = s:sub(b,e)

            if tmp:find('=') then
                t[tmp:sub(0, tmp:find('=') - 1)] =  tmp:sub(tmp:find('=') + 1, -1)
            else
                t[s:sub(b,e)] = {}
            end

        end
    end

    return t
end




function execute_parsed_command(command)

    local cmd = command:sub(0, command:find("%s")-1)
    local args = command:sub(cmd:len()+2)

    t=command_parse(args)

    if cmds[cmd] then
        cmds[cmd](t)
    end

end


cmds = {
    php = function(t)
        print("Ay this is an executed php command.")
        if t['artisan'] then
            print('Artisan')
        end
        if t[1] then
            print('I have a value')
        end
    end
}


for key, command in pairs(command_strings) do
    execute_parsed_command(command)
end