extmine

args = {...}

-- length of the shaft
args[1] = args[1] or 75
-- count of the shaft circles
args[2] = args[2] or 1
-- is dig friable blocks needed
args[3] = args[3] or false
-- set debug level to
args[4] = args[4] or 2
print(args[4])

print("initializing logger...")
shell.run("/programs/logger")
print("initializing extmine API...")
shell.run("/programs/extmineapi")
print("complete")

if args[1] ~= "ini" then
  logger.minLevel = args[4]
  for i = 1, args[2] do
    -- digging circle shaft
    if not em:step(args[1], args[3]) then break end
    turtle.turnRight()
    if not em:step(1) then break end
    em:tryPlaceTorch()
    if not em:step(2) then break end
    turtle.turnRight()
    if not em:step(args[1], args[3]) then break end
    turtle.turnRight()
    if not em:step(3) then break end
    -- digging corridor
    turtle.turnLeft()
    if not em:step(1) then break end
    turtle.turnLeft()
    if not em:step(3) then break end
    em:tryPlaceTorch()
    if not em:step(3) then break end
    turtle.turnLeft()
    if not em:step(1) then break end
    turtle.turnLeft()
    if not em:step(2) then break end
    turtle.turnRight()
    turtle.turnRight()
    if not em:step(2) then break end
    turtle.turnLeft()
  end
end