refuel

local tArgs = { ... }
local nLimit = 1
if #tArgs > 1 then
    print( "Usage: refuel [number]" )
    return
elseif #tArgs > 0 then
    if tArgs[1] == "all" then
        nLimit = 64 * 16
    else
        nLimit = tonumber( tArgs[1] )
    end
end

if turtle.getFuelLevel() ~= "unlimited" then
    for n=1,16 do
        local nCount = turtle.getItemCount(n)
        if nCount > 0 then
            turtle.select( n )
            if nCount >= nLimit then
                if turtle.refuel( nLimit ) then
                    break
                end
            else
                if turtle.refuel( nCount ) then
                    nLimit = nLimit - nCount
                end
            end
        end
    end
end

print( "Fuel level is "..turtle.getFuelLevel() )