old_contents: # Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
  #               2014 Martine Lenders <mlenders@inf.fu-berlin.de>
  #
  # This file is subject to the terms and conditions of the GNU Lesser
  # General Public License v2.1. See the file LICENSE in the top level
  # directory for more details.
  
  import os
  import signal
  import sys
  import subprocess
  import time
  from traceback import extract_tb, print_tb
  
  import pexpect
  
  PEXPECT_PATH = os.path.dirname(pexpect.__file__)
  RIOTBASE = os.environ['RIOTBASE'] or \
             os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", ".."))
  
  def list_until(l, cond):
      return l[:([i for i, e in  enumerate(l) if cond(e)][0])]
  
  def run(testfunc, timeout=10, echo=True, traceback=False):
      env = os.environ.copy()
      child = pexpect.spawnu("make term", env=env, timeout=timeout)
  
      # on many platforms, the termprog needs a short while to be ready...
      time.sleep(3)
  
      if echo:
          child.logfile = sys.stdout
  
      try:
          subprocess.check_output(('make', 'reset'), env=env,
                                  stderr=subprocess.PIPE)
      except subprocess.CalledProcessError:
          # make reset yields error on some boards even if successful
          pass
      try:
          testfunc(child)
      except pexpect.TIMEOUT:
          timeouted_at = list_until(extract_tb(sys.exc_info()[2]),
                                    lambda frame:
                                        frame.filename.startswith(PEXPECT_PATH))[-1]
          print("Timeout in expect script at \"%s\" (%s:%d)" %
                      (timeouted_at.line,
                       os.path.relpath(os.path.abspath(timeouted_at.filename), RIOTBASE),
                       timeouted_at.lineno))
          if traceback:
              print_tb(sys.exc_info()[2])
          return 1
      finally:
          print("")
          os.killpg(os.getpgid(child.pid), signal.SIGKILL)
          child.close()
  
      return 0
  
new_contents: # Copyright (C) 2016 Kaspar Schleiser <kaspar@schleiser.de>
  #               2014 Martine Lenders <mlenders@inf.fu-berlin.de>
  #
  # This file is subject to the terms and conditions of the GNU Lesser
  # General Public License v2.1. See the file LICENSE in the top level
  # directory for more details.
  
  import os
  import signal
  import sys
  import subprocess
  import time
  from traceback import extract_tb, print_tb
  
  import pexpect
  
  PEXPECT_PATH = os.path.dirname(pexpect.__file__)
  RIOTBASE = os.environ['RIOTBASE'] or \
             os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "..", ".."))
  
  def list_until(l, cond):
      return l[:([i for i, e in  enumerate(l) if cond(e)][0])]
  
  def find_exc_origin(exc_info):
      pos = list_until(extract_tb(exc_info),
                       lambda frame: frame.filename.startswith(PEXPECT_PATH)
                      )[-1]
      return pos.line, \
             os.path.relpath(os.path.abspath(pos.filename), RIOTBASE), \
             pos.lineno
  
  def run(testfunc, timeout=10, echo=True, traceback=False):
      env = os.environ.copy()
      child = pexpect.spawnu("make term", env=env, timeout=timeout)
  
      # on many platforms, the termprog needs a short while to be ready...
      time.sleep(3)
  
      if echo:
          child.logfile = sys.stdout
  
      try:
          subprocess.check_output(('make', 'reset'), env=env,
                                  stderr=subprocess.PIPE)
      except subprocess.CalledProcessError:
          # make reset yields error on some boards even if successful
          pass
      try:
          testfunc(child)
      except pexpect.TIMEOUT:
          line, filename, lineno = find_exc_origin(sys.exc_info()[2])
          print("Timeout in expect script at \"%s\" (%s:%d)" %
                (line, filename, lineno))
          if traceback:
              print_tb(sys.exc_info()[2])
          return 1
      finally:
          print("")
          os.killpg(os.getpgid(child.pid), signal.SIGKILL)
          child.close()
  
      return 0
  
subject: refactor exception printing