text: import os
  import shutil
  import sys
  import subprocess
  import time
  
  travis = False
  if "TRAVIS" in os.environ and os.environ["TRAVIS"] == "true":
      travis = True
  
  success_count = 0
  fail_count = 0
  exit_status = 0
  
  total_time = time.monotonic()
  
  all_examples = []
  
  # build all example if input not existed
  if len(sys.argv) > 1:
      all_examples.append(sys.argv[1])
  else:
      for entry in os.scandir("examples/device"):
          if entry.is_dir():
              all_examples.append(entry.name)
  
      # TODO update freeRTOS example to work with all boards (only nrf52840 now)
      all_examples.remove("cdc_msc_hid_freertos")
  
  all_boards = []
  for entry in os.scandir("hw/bsp"):
      if entry.is_dir():
          all_boards.append(entry.name)
  
  
  def build_example(example, board):
      subprocess.run("make -C examples/device/{} BOARD={} clean".format(example, board), shell=True,
                     stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
      return subprocess.run("make -j 4 -C examples/device/{} BOARD={} all".format(example, board), shell=True,
                            stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
  
  
  build_format = '| {:30} | {:30} | {:9} '
  build_separator = '-' * 87
  print(build_separator)
  print((build_format + '| {:5} |').format('Example', 'Board', 'Result', 'Time'))
  for example in all_examples:
      print(build_separator)
      for board in all_boards:
          start_time = time.monotonic()
          build_result = build_example(example, board)
          build_duration = time.monotonic() - start_time
  
          if build_result.returncode == 0:
              success = "\033[32msucceeded\033[0m"
              success_count += 1
          else:
              exit_status = build_result.returncode
              success = "\033[31mfailed\033[0m   "
              fail_count += 1
  
          if travis:
              print('travis_fold:start:build-{}-{}\\r'.format(example, board))
  
          print((build_format + '| {:.2f}s |').format(example, board, success, build_duration))
          if build_result.returncode != 0:
              print(build_result.stdout.decode("utf-8"))
  
          if travis:
              print('travis_fold:end:build-{}-{}\\r'.format(example, board))
  
  # FreeRTOS example
  # example = 'cdc_msc_hid_freertos'
  # board = 'pca10056'
  # build_example(example, board)
  
  total_time = time.monotonic() - total_time
  print(build_separator)
  print("Build Sumamary: {} \033[32msucceeded\033[0m, {} \033[31mfailed\033[0m and took {:.2f}s".format(success_count, fail_count, total_time))
  print(build_separator)
  
  sys.exit(exit_status)
  