ComputerCraft/Tree_Farm/farmtree.lua

--[[Tree Farming App by Al Sweigart
Plants tree and cuts it down.]]

os.loadAPI('hare.lua') -- Load the hare module

local blockExists, item
local logCount = 0

-- Check if choptree program exists
if not fs.exists('choptree.lua') then
  error('You must install choptree app first')
end

while true do
  -- Check inventory for saplings
  if not hare.selectItem('minecraft:spruce_sapling') then
    error('Out of saplings')
  end
  
  print('Planting...')
  turtle.place() -- plant sapling
  
  -- Loop until tree is grown
  while true do
    blockExists, item = turtle.inspect()
    if item['name'] ~= 'minecraft:spruce_log' then
      print('wait 5 seconds')
      os.sleep(5)
    else
      break -- tree has grown
    end 
  end
  hare.selectEmptySlot()
  shell.run('choptree.lua') -- run choptree

  -- move to and face chest
  turtle.back()
  turtle.turnLeft()
  turtle.turnLeft()

  -- put logs into chest
  while hare.selectItem('minecraft:spruce_log') do
   logCount = logCount + turtle.getItemCount()
    print('Total logs: ' .. logCount)
    turtle.drop()
  end

  --face planting sport
  turtle.turnLeft()
  turtle.turnLeft()
end