text: #!/usr/bin/env python
  
  # Copyright 2015-present Samsung Electronics Co., Ltd. and other contributors
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from __future__ import print_function
  
  import argparse
  import fileinput
  import functools
  import os
  import subprocess
  import tempfile
  import re
  
  from distutils import spawn
  
  from check_license import CheckLicenser
  from common_py.system.filesystem import FileSystem as fs
  from common_py.system.executor import Executor as ex
  
  
  def parse_option():
      parser = argparse.ArgumentParser()
      parser.add_argument('--autoedit', action='store_true', default=False,
          help='Automatically edit the detected clang format and eslint errors.'
          'No diffs will be displayed')
  
      option = parser.parse_args()
      return option
  
  
  class StyleChecker(object):
  
      column_limit = 80
  
      def __init__(self):
          self.count_lines = 0
          self.count_empty_lines = 0
          self.errors = []
          self.rules = []
          self.err_msgs = []
  
      @property
      def error_count(self):
          return len(self.errors)
  
      @property
      def count_valid_lines(self):
          return self.count_lines - self.count_empty_lines
  
      def report_error(self, msg):
          name = fileinput.filename()
          line = fileinput.filelineno()
          self.errors.append("%s:%d: %s" % (name, line, msg))
  
      def set_rules(self):
          limit = StyleChecker.column_limit
          self.rules.append(re.compile(r"[\t]"))
          self.err_msgs.append("TAB character")
          self.rules.append(re.compile(r"[\r]"))
          self.err_msgs.append("CR character")
          self.rules.append(re.compile(r"[ \t]+[\n]$"))
          self.err_msgs.append("Trailing Whitespace")
          self.rules.append(re.compile(r"[^\n]\Z"))
          self.err_msgs.append("Line ends without NEW LINE character")
          self.rules.append(re.compile("^.{" + str(limit+1) + ",}"))
          self.err_msgs.append("Line exceeds %d characters" % limit)
          # append additional rules
  
      def check(self, files):
          for line in fileinput.input(files):
              for i, rule in enumerate(self.rules):
                  mc = rule.search(line)
                  if mc:
                      self.report_error(self.err_msgs[i])
  
              if fileinput.isfirstline():
                  if not CheckLicenser.check(fileinput.filename()):
                      self.report_error('incorrect license')
  
              self.count_lines += 1
              if not line.strip():
                  self.count_empty_lines += 1
  
  
  class ClangFormat(object):
  
      def __init__(self, extensions, skip_files=None, options=None):
          self.diffs = []
          self._extensions = extensions
          self._skip_files = skip_files
          self._options = options
          self._check_clang_format("clang-format-3.8")
  
      def _check_clang_format(self, base):
          clang_format = spawn.find_executable(base)
  
          if not clang_format:
              clang_format = spawn.find_executable("clang-format")
              if clang_format:
                  print("%sUsing %s instead of %s%s"
                        % (ex._TERM_YELLOW, clang_format, base, ex._TERM_EMPTY))
              else:
                  print("%sNo %s found, skipping checks!%s"
                        % (ex._TERM_RED, base, ex._TERM_EMPTY))
  
          self._clang_format = clang_format
  
      @property
      def error_count(self):
          return len(self.diffs)
  
      def is_checked_by_clang(self, file):
          _, ext = fs.splitext(file)
          return ext in self._extensions and file not in self._skip_files
  
      def check(self, files):
          if not self._clang_format:
              return
  
          for file in filter(self.is_checked_by_clang, files):
              args = ['-style=file', file]
              if self._options and self._options.autoedit:
                  args.append('-i')
              output = ex.check_run_cmd_output(self._clang_format,
                                         args, quiet=True)
  
              if output:
                  with tempfile.NamedTemporaryFile() as temp:
                      temp.write(output)
                      temp.flush() # just to be really safe
                      self._diff(file, temp.name)
  
      def _diff(self, original, formatted):
          try:
              subprocess.check_output(['diff', '-u', original, formatted])
          except subprocess.CalledProcessError as error:
              # if there is a difference between the two files
              # this error will be generated and we can extract
              # the diff from that it. Otherwise nothing to do.
              self.diffs.append(error.output.decode())
  
  class EslintChecker(object):
  
      def __init__(self, options=None):
          self._check_eslint()
          self._options = options
  
      def _check_eslint(self):
          self._node = spawn.find_executable('node')
          if not self._node:
              print('%sNo node found.%s'
                      % (ex._TERM_RED, ex._TERM_EMPTY))
              return
  
          self._eslint = spawn.find_executable('node_modules/.bin/eslint')
          if not self._eslint:
              self._eslint = spawn.find_executable('eslint')
              if not self._eslint:
                  print('%sNo eslint found.%s'
                          % (ex._TERM_RED, ex._TERM_EMPTY))
  
      def check(self):
          self.error_count = 0
  
          if not self._node or not self._eslint:
              return
          args = ['src', '-f', 'codeframe']
          if self._options and self._options.autoedit:
               args.append('--fix')
  
          output = ex.run_cmd_output(self._eslint, args, quiet=True)
          match = re.search('(\d+) error', output)
          if match:
              self.error_count = int(match.group(1))
  
          # Delete unnecessary error messages.
          self.errors = output.split('\n')[:-4]
  
  
  class FileFilter(object):
  
      def __init__(self, allowed_exts, allowed_files, skip_files):
          self._allowed_exts = allowed_exts
          self._allowed_files = allowed_files
          self._skip_files = skip_files
  
      def __call__(self, dir_path, file):
          if file in self._allowed_files:
              return True
  
          if file in self._skip_files:
              return False
  
          _, ext = fs.splitext(file)
          return ext in self._allowed_exts
  
  
  def check_tidy(src_dir, options=None):
      allowed_exts = ['.c', '.h', '.js', '.py', '.sh', '.cmake']
      allowed_files = ['CMakeLists.txt']
      clang_format_exts = ['.c', '.h']
      skip_dirs = ['deps', 'build', '.git', 'node_modules', 'coverage',
                   'iotjs_modules']
      skip_files = ['check_signed_off.sh', '__init__.py',
                    'iotjs_js.c', 'iotjs_js.h', 'iotjs_string_ext.inl.h',
                    "iotjs_module_inl.h",
                    'ble.js',
                    'ble_hci_socket_acl_stream.js',
                    'ble_hci_socket_smp.js',
                    'ble_hci_socket_hci.js',
                    'ble_hci_socket_gap.js',
                    'ble_hci_socket_gatt.js',
                    'ble_hci_socket_mgmt.js',
                    'ble_hci_socket_bindings.js',
                    'ble_characteristic.js',
                    'test_ble_setservices.js',
                    '.eslintrc.js'
                    ]
  
      style = StyleChecker()
      style.set_rules()
      clang = ClangFormat(clang_format_exts, skip_files, options)
      eslint = EslintChecker(options)
  
      file_filter = FileFilter(allowed_exts, allowed_files, skip_files)
      files = fs.files_under(src_dir, skip_dirs, file_filter)
  
      clang.check(files)
      style.check(files)
      eslint.check()
  
      if clang.error_count:
          print("Detected clang-format problems:")
          print("".join(clang.diffs))
          print()
  
      if style.error_count:
          print("Detected style problems:")
          print("\n".join(style.errors))
          print()
  
      if eslint.error_count:
          print("Detected eslint problems:")
          print("\n".join(eslint.errors))
          print()
  
      total_errors = style.error_count + clang.error_count + eslint.error_count
      print("* total lines of code: %d" % style.count_lines)
      print("* total non-blank lines of code: %d" % style.count_valid_lines)
      print("* style errors: %d" % style.error_count)
      print("* clang-format errors: %d" % clang.error_count)
      print("* eslint errors: %d" % eslint.error_count)
  
      msg_color = ex._TERM_RED if total_errors > 0 else ex._TERM_GREEN
      print("%s* total errors: %d%s" % (msg_color, total_errors, ex._TERM_EMPTY))
      print()
  
      if total_errors:
          ex.fail("Failed tidy check")
  
  
  
  if __name__ == '__main__':
      from common_py import path
      options = parse_option()
      check_tidy(path.PROJECT_ROOT, options)
  