dl

local function printUsage()
    print( "Usage:" )
    print( "dl <filename> [-e extension] [-s] [-i] [-r]" )
end

function getOpt(tArgs)
    local function isOption(text)
        --if text starts with a dash like "-something" consider it an option
        if (text == nil) or (string.sub(text, 0, 1) == "-") then
            return true
        else
            return false
        end
    end
    local opt = {}
    local i = 1
    while i <= #tArgs do
        if isOption(tArgs[i]) then
            if isOption(tArgs[i+1]) then
                --if no argument (no next arg or it's an option too)
                --interpret like options.something = true
                opt[string.sub(tArgs[i], 2)] = true
            else
                --interpret like options.something = value
                opt[string.sub(tArgs[i], 2)] = tArgs[i+1]
                i = i+1 --skip the next arg, it was the argument for -something
            end
        else
            --if not an option
            --aka a random arg, do options[number] = argument
            table.insert(opt, tArgs[i])
        end

        i = i+1
    end
    return opt
end

local tArgs = { ... }
local options = getOpt(tArgs)

local fileName = options[1]

local extension = options.e
if not extension then extension = "lua" end

local file=http.get("http://wyvern67.free.fr/Minecraft/scripts/"..fileName.."."..extension)
if not file then print("Url invalide") return false end

local cFile = file.readAll()
file.close()

local fHandle = fs.open(fileName.."."..extension, "w")
fHandle.write(cFile)
fHandle.close()

local action
if options.i then
    if fs.exists("startup.lua") then
        fs.delete("startup.lua")
        action = " and startup overwritten"
    else
        action = " and startup written"
    end

    fHandle = fs.open("startup.lua", "w")
    if options.e then
        fHandle.writeLine('shell.run("dl", "' .. options[1] .. '", "-e", ' .. extension .. '"-s")')
    else
        fHandle.writeLine('shell.run("dl", "' .. options[1] .. '", "-s")')
    end
    fHandle.writeLine('shell.run("'..fileName.."."..extension..'")')
    fHandle.close()
else
    action = ""
end

if options.s == nil then
    print("Downloaded as "..fileName.."."..extension..action)
end

if options.r then
    os.reboot()
end