branch_mine

local argv = {...}
local branch_count = argv[1] or 2
local branch_length = argv[2] or 8
local branch_torch_distance = argv[3] or 9

-- Constants
local torch_slot = 1
local main_adit_width = 3


local main_adit_length = branch_count * 4

-- Figure out how many torches we need
local required_torches_per_branch = 2 + ( branch_length / branch_torch_distance )
local required_torches = required_torches_per_branch * ( branch_count + 1 )

-- Ensure we have enough torches
local torchSlotInfo = turtle.getItemDetail( torch_slot )
if torchSlotInfo then
  if torchSlotInfo.count < required_torches then
		print( "Insufficient torches, what about the Grues?" )
  print( "I only have "..torchSlotInfo.count..", but I would really like "..required_torches)
	  return -2
	end
else
	print( "No torches, I'm afraid of the dark." )
	return -1
end

-- Dig the main shaft and prepare to carve teh branches
shell.run("tun", main_adit_length, main_adit_width, "right", 1 )
shell.run("left", 2 )
shell.run("forward", 3 )
shell.run("turn", "left" )

function carve_branch()
	shell.run( "carve_branches", branch_count, branch_length, branch_torch_distance )
end

carve_branch()
shell.run( "turn", "right", "2" )
shell.run( "forward", main_adit_width - 1 )
carve_branch()