code: def main(commit_only=True):
      
      global TEMP_FOLDER
      exit_code = 0
      hook_checks = HookConfig(get_config_file())
      with files_to_check(commit_only) as files:
          for name, mod in checks():
              default = getattr(mod, 'DEFAULT', 'off')
              if hook_checks.is_enabled(name, default=default):
                  if hasattr(mod, 'REQUIRED_FILES'):
                      for filename in mod.REQUIRED_FILES:
                          if os.path.isfile(filename):
                              try:
                                  shutil.copy(filename, TEMP_FOLDER)
                              except shutil.Error:
                                  # Copied over by a previous check
                                  continue
                  args = hook_checks.arguments(name)
  
                  tmp_files = [os.path.join(TEMP_FOLDER, f) for f in files]
  
                  if args:
                      errors = mod.run(tmp_files, TEMP_FOLDER, args)
                  else:
                      errors = mod.run(tmp_files, TEMP_FOLDER)
                  if errors:
                      title_print("Checking {0}".format(name))
                      print((errors.replace(TEMP_FOLDER + "/", '')))
                      print("")
                      exit_code = 1
  
      if exit_code == 1:
          title_print("Rejecting commit")
      return exit_code
docs: Run the configured code checks.
  
      Return system exit code.
          1 - reject commit
          0 - accept commit