farmland.lua

local dist, width = arg[1], arg[2]
local spacing, row_num = 6, 1

local function tryRefuel()
        for n = 1, 16 do
        print("yo", n)
            if turtle.getItemCount(n) > 0 then
                turtle.select(n)
                if turtle.refuel(1) then
                    turtle.select(1)
                    return true
                end
            end
        end
        turtle.select(1)
        return false
    end

local function refuel()
    local fuelLevel = turtle.getFuelLevel()
    if fuelLevel == "unlimited" or fuelLevel > 0 then
        return
    end

    if not tryRefuel() then
        print("Add more fuel to continue.")
        while not tryRefuel() do
            os.pullEvent("turtle_inventory")
        end
        print("Resuming Tunnel.")
    end
end

function tryDig()
    while turtle.detect() do
        if turtle.dig() then
            sleep(0.5)
        else
            return false
        end
    end
    return true
end

function tryDigUp()
    while turtle.detectUp() do
        if turtle.digUp() then
            sleep(0.5)
        else
            return false
        end
    end
    return true
end

function tryDigDown()
    while turtle.detectDown() do
        if turtle.digDown() then
            sleep(0.5)
        else
            return false
        end
    end
    return true
end

function tryUp()
    refuel()
    while not turtle.up() do
        if turtle.detectUp() then
            if not tryDigUp() then
                return false
            end
        else
            sleep(0.5)
        end
    end
    return true
end

function tryDown()
    refuel()
    while not turtle.down() do
        if turtle.detectDown() then
            if not tryDigDown() then
                return false
            end
        else
            sleep(0.5)
        end
    end
    return true
end

function tryForward()
    refuel()
    while not turtle.forward() do
        if turtle.detect() then
            if not tryDig() then
                return false
            end
        else
            sleep(0.5)
        end
    end
    return true
end

function tryBack()
    refuel()
    if not turtle.back() then
        turnLeft(2)
        local ret = tryForward()
        turnLeft(2)
        return ret
    end
    return true
end

function checkIfSlotIsItem(slot, name)
    local item = turtle.getItemDetail(slot)
    if item ~= nil then
        return item["name"] == name
    end
    return false
end

function findItem(name)
    for slot = 1, 16 do
        if checkIfSlotIsItem(slot, name) then
            return slot
        end
    end
    return -1
end

function checkIfHaveItem(name)
    return findItem(name) ~= -1
end

function findEmpty()
    for index = 1, 16 do
        if turtle.getItemCount(index) == 0 then
            return index
        end
    end
    return -1
end

function countItems()
    local total = 0
    for index = 1, 16 do
        total = turtle.getItemCount(index) + total
    end
end


for w = 1, width do
  if checkIfHaveItem("minecraft:diamond_pickaxe") then
    turtle.select(findItem("minecraft:diamond_pickaxe"))
    turtle.equipRight()
  end
  for i = 1, dist do
    local count = 0
    while turtle.detect() do
      turtle.dig()
      tryUp()
      count = count + 1
    end
    for n = 1, count do
      tryDown()
    end
    tryForward()
    if w % spacing == row_num then
      turtle.digDown()
      local bucket = findItem("minecraft:bucket")
      if bucket == -1 then
        turtle.select(findItem("minecraft:water_bucket"))
        turtle.placeDown()
        bucket = findItem("minecraft:bucket")
      end
      local isbelow, data = turtle.inspectDown()
      if (data["name"] ~= "minecraft:water" and bucket ~= -1) or (data["name"] == "minecraft:water" and data["state"]["level"] ~= 0) then
        turtle.select(bucket)
        tryBack()
        tryBack()
        turtle.placeDown()
        tryForward()
        tryForward()
        turtle.placeDown()
      end
      tryDown()
    end
    local dirt = findItem("minecraft:dirt")
    if dirt ~= -1 then
    local isbelow, data = turtle.inspectDown()
    if isbelow and data["name"] ~= "minecraft:dirt" then
        turtle.digDown()
    end
    turtle.select(dirt)
    turtle.placeDown()
    if w % spacing == row_num then
        tryUp()
    end
    end
  end
  turtle.equipRight()
  while not checkIfHaveItem("minecraft:diamond_hoe") do
    term.clear()
    term.setCursorPos(1, 1)
    print("Give me diamond hoe, hoe")
  end
  turtle.select(findItem("minecraft:diamond_hoe"))
  turtle.equipRight()
  for i = 1, dist do
    tryBack()
    turtle.dig()
  end
  if w ~= width then
    turtle.turnLeft()
    tryForward()
    turtle.turnRight()
  end
end
turtle.equipRight()