Updated the file to support modules.lua and check fuel

The app now checks if it has enough fuel and if not, it asks for more.
Additionally it digs everythin in front of it, except for the last block.

Tree_Farm/farmtree.lua

@@ -1,71 +1,82 @@
 --[[Tree Farming App by Al Sweigart
 Plants tree and cuts it down.]]
 
-os.loadAPI('hare.lua') -- Load the hare module
+os.loadAPI('modules.lua') -- Load the modules module
 
 local NUM_OF_TREES = 4
-local TREE_SAPLING = 'spruce'
+local TREE_SAPLING = 'oak'
 
 -- Check if choptree program exists
 if not fs.exists('choptree.lua') then
-    error('You must install choptree app first')
+  error('You must install choptree app first')
 end
 
 while true do
-    -- First of all, wait a few minutes
+  -- First of all, wait a few minutes
-    os.sleep(300)
+  os.sleep(300)
-    -- Check if turtle has enough fuel
+
-    if turtle.getFuelLevel() < (2 * (3 * NUM_OF_TREES)) then
+  -- Sort all Items together
-	hare.selectItem('minecraft:' .. TREE_SAPLING .. 'log')
+  modules.sort_items()
-	turtle.refuel(2)
+
+
+  -- Empty everything except for the saplings
+  for i = 1, 16 do
+    local item = turtle.getItemDetail(i)
+
+    if item ~= nil and item['name'] ~= 'minecraft:' .. TREE_SAPLING .. '_sapling' then
+      turtle.select(i)
+      turtle.drop()
     end
+  end
 
-    -- Empty everything except for the saplings
-    for i = 1, 16 do
-	local item = turtle.getItemDetail(i)
 
-	if item ~= nil and item['name'] ~= 'minecraft:' .. TREE_SAPLING .. '_sapling' then
+  -- Check if we have saplings in our inventory
-	    turtle.select(i)
+  if not modules.select_item('minecraft:' .. TREE_SAPLING .. '_sapling') then
-	    turtle.drop()
+    error('Out of ' .. TREE_SAPLING .. ' saplings')
-	end
+  end
+
+  -- Build a Loop, where we plant and cut trees
+  turtle.turnLeft()
+  turtle.turnLeft()
+  for i = 1, NUM_OF_TREES do
+    for j = 1, 3 do
+      check_fuel()
+      if i ~= 3 * NUM_OF_TREES then
+        turtle.dig()
+      end
+      turtle.forward()
     end
-
+    turtle.turnLeft()
- 
+    blockExists, item = turtle.inspect()
-    -- Check if we have saplings in our inventory
+    if blockExists and item['name'] == 'minecraft:' .. TREE_SAPLING .. '_log' then
-    if not hare.selectItem('minecraft:' .. TREE_SAPLING .. '_sapling') then
+      modules.selectEmptySlot()
-        error('Out of ' .. TREE_SAPLING .. ' saplings')
+      shell.run('choptree.lua') -- Run Choptree
+    elseif blockExists and item['name'] ~= 'minecraft:' .. TREE_SAPLING .. '_sapling' then
+      print('Error! Wrong block')
+    elseif not blockExists then
+      turtle.forward()
+      local success, underneath = turtle.inspectDown()
+      if underneath['name'] ~= 'minecraft:dirt' and underneath['name'] ~= 'minecraft:grass_block' then
+        print('Error. No Dirt or Grass underneath to plant a tree. Found: ' .. underneath['name'])
+        turtle.back()
+      else
+        turtle.back()
+        modules.selectItem('minecraft:' .. TREE_SAPLING .. '_sapling')
+        turtle.place()
+      end
     end
+    turtle.turnRight()
+  end
 
-    -- Build a Loop, where we plant and cut trees
+  -- Move forward to the chest again
-    for i = 1, NUM_OF_TREES do
+  turtle.turnLeft()
-	turtle.back()
+  turtle.turnLeft()
-	turtle.back()
+  for i = 1, (3 * NUM_OF_TREES) do
-	turtle.back()
+    check_fuel()
-	turtle.turnRight()
+    if i ~= 3 * NUM_OF_TREES then
-	blockExists, item = turtle.inspect()
+      turtle.dig()
-	if blockExists and item['name'] == 'minecraft:' .. TREE_SAPLING .. '_log' then
-	    hare.selectEmtySlot()
-            shell.run('choptree.lua') -- Run Choptree
-	elseif blockExists and item['name'] ~= 'minecraft:' .. TREE_SAPLING .. '_sapling' then
-	    print('Error! Wrong block')
-	elseif not blockExists then
-	    turtle.forward()
-	    local success, underneath = turtle.inspectDown()
-	    if underneath['name'] ~= 'minecraft:dirt' and underneath['name'] ~= 'minecraft:grass_block' then
-                print('Error. No Dirt or Grass underneath to plant a tree. Found: ' .. underneath['name'])
-		turtle.back()
-	    else
-		turtle.back()
-		hare.selectItem('minecraft:' .. TREE_SAPLING .. '_sapling')
-		turtle.place()
-	    end
-	end
-	turtle.turnLeft()
-    end
-
-    -- Move forward to the chest again
-    for i = 1, (3 * NUM_OF_TREES) do
-        turtle.forward()
     end
+    turtle.foward()
+  end
 
 end