Bread - CC Redirect through BLittle

--requires CC 1.76 or higher (MC 1.8 or higher)

local endit = function(code)
    local codes = {
        [1] = "Your ComputerCraft version is too low. You need CC1.76 or higher (for Minecraft 1.8)",
        [2] = fs.getName(shell.getRunningProgram()).." <program> ...",
    }
    print(codes[code or 2])
    error()
end

if _HOST then
    if tonumber(_HOST:sub(15,18)) < 1.76 then
        endit(1)
    end
else
    endit(1)
end
if tonumber(os.version():sub(9)) < 1.7 then
    endit(1)
end

local getFile = function(filename,url)
    if fs.isReadOnly(filename) then
        return false, "access denied"
    end
    local prog = http.get(url)
    if not prog then
        return false, "could not connect"
    end
    prog = prog.readAll()
    local fyle = fs.open(filename,"w")
    fyle.write(prog)
    fyle.close()
    return true, fs.getSize(filename)
end

local apidir = fs.combine(shell.dir(),"blittle")
if (not blittle) then
    if fs.exists(apidir) then
        os.loadAPI(apidir)
    else
        print("Downloading blittle...")
        local res = getFile(apidir,"http://pastebin.com/raw/ujchRSnU")
        if not res then
            error("...but couldn't!")
        else
            os.loadAPI(apidir)
        end
    end
end

local tArg = {...}
local mon = blittle.createWindow()
local oldTerm = term.redirect(mon)
mon.setVisible(true)
shell.run(unpack(tArg))
mon.setVisible(false)
term.redirect(oldTerm)