KREOS setup

if not term.isColor and not term.isColor() then
    if os.getVersion() == "CraftOS 1.3" then
        print("Sorry, this OS can only run on Computers with CraftOS 1.4 and above.")
        error()
    end

    print("Sorry, this OS can only run on Advanced Computers")
    error()
end

if not http then
    print("Sorry, This OS requires the HTTP API to be enabled, please enable it.")
    error()
end

local w, h = term.getSize()

function fileDownload(path, url)
    local text = http.get( url ).readAll()
    local file = assert( io.open( path, "w" ) )
    file:write( text )
    file:close()
end

if fs.exists("/kreos") then fs.delete("/kreos") end
fs.makeDir("/kreos")
fs.makeDir("/kreos/temp")
fs.makeDir("/kreos/api")
fs.makeDir("/kreos/pictures")
fs.makeDir("/kreos/programs")
fs.makeDir("/kreos/config")
fileDownload("/kreos/temp/updatefiles.kre", "http://bitnut.de/kreos20/updatefiles.kre")
term.clear()
print("Downloading... Please wait a moment.")
local file = fs.open("/kreos/temp/updatefiles.kre", "r")
local lines = {}
local i = 1
local line = file.readLine()
while line ~= nil do

    lines[i] = line
    line = file.readLine()
    i = i + 1

    if line ~= nil then
        print("Downloading..." ..tostring(line))
        if fs.exists(tostring(line)) then fs.delete(tostring(line)) end
        fileDownload(tostring(line), "http://bitnut.de/kreos20/sysfiles/" ..tostring(line))
    else
        break
    end
end
file:close()
print("All files are downloaded!")
print("System will reboot now.")
sleep(1)
os.reboot()