Auto felling program for ComputerCraft

AutoFelling.lua

local resInspect, blkInfo = turtle.inspect()

local blkType = blkInfo.name
print(resInspect)
print(blkType)

if resInspect == false then
  print("Front block is nil.")
  return
end

if string.find(blkType, "log") == nil then
  print("Target is not log.")
  return
end

print("Target is log!")


-- Felling
local step = 0

repeat
  -- Get front log
  local resDig = turtle.dig()
  -- Can't dig
  if not resDig then
    print("DigFront faild.")
    break
  end

  -- Check up
  local blkUp = turtle.detectUp()
  
  if blkUp == true then
    resDig = turtle.digUp()
    -- Can't dig
    if not resDig then
      print("DigUp failed.")
      break
    end
  end

  -- Move up
  local resMove = turtle.up()
  -- Can't move
  if not resMove then
    print("MoveUp faild.")
    break
  end

  -- Increment
  step = step + 1
  
  -- Inspect front block
  resInspect, blkInfo = turtle.inspect()
  
  -- Update block type name
  if resInspect == true then
    blkType = blkInfo.name
    print("BlockType updated.")
  end
  
  print(blkType)
until string.find(blkType, "log") == nil

-- End felling
local moveDown = 0
local resMove = false
while moveDown < step do
  -- Move down
  resMove = turtle.down()

  -- If move success
  if resMove == true then
    moveDown = moveDown + 1
  end
end

AutoFellingMove.lua

local PRG_DIR = "/dev"
local MOVE_FRONT_VAL = 3
local MOVE_DIFF_CNT = 6
local REPEAT_CNT = 4

print("Start program!")
local stop = false
local moveTargetCnt = MOVE_FRONT_VAL
local moveFront = 0
local moveFrontTemp = 0
local resDig = false
local resMove = false

for i = 1, REPEAT_CNT, 1 do
  moveFrontTemp = 0

  while moveFrontTemp < moveTargetCnt do
    local frontBlock = turtle.detect()
    if frontBlock == true then
      resDig = turtle.dig()
      if resDig == false then
        stop = true
        break
      end
    end

    resMove = turtle.forward()
    if resMove == true then
      moveFrontTemp = moveFrontTemp + 1
      moveFront = moveFront + 1
    end
  end

  if stop == true then
    break
  end

  -- TODO Check fail
  turtle.turnLeft()


  print("Start felling...")
  shell.setDir(PRG_DIR)
  shell.run("AutoFelling.lua")

  turtle.turnRight()

  moveTargetCnt = MOVE_DIFF_CNT
end

print("End felling.")
while moveFront > 0 do
  resMove = turtle.back()
  if resMove == true then
    moveFront = moveFront - 1
  end
end

print("Dropping item...")
local itemCnt = 0
for i = 1, 16, 1 do
  turtle.select(i)
  itemCnt = turtle.getItemCount()
  
  if itemCnt > 0 then
    turtle.dropUp(itemCnt)
  end
end

print("End program.")