text: #!/usr/bin/env python3
  # Copyright (c) 2015-2018 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  '''
  This checks if all command line args are documented.
  Return value is 0 to indicate no error.
  
  Author: @MarcoFalke
  '''
  
  from subprocess import check_output
  import re
  import sys
  
  FOLDER_GREP = 'src'
  FOLDER_TEST = 'src/test/'
  CMD_ROOT_DIR = '`git rev-parse --show-toplevel`/{}'.format(FOLDER_GREP)
  CMD_GREP_ARGS = r"egrep -r -I '(map(Multi)?Args(\.count\(|\[)|Get(Bool)?Arg\()\"\-[^\"]+?\"' {} | grep -v '{}'".format(CMD_ROOT_DIR, FOLDER_TEST)
  CMD_GREP_DOCS = r"egrep -r -I 'HelpMessageOpt\(\"\-[^\"=]+?(=|\")' {}".format(CMD_ROOT_DIR)
  REGEX_ARG = re.compile(r'(?:map(?:Multi)?Args(?:\.count\(|\[)|Get(?:Bool)?Arg\()\"(\-[^\"]+?)\"')
  REGEX_DOC = re.compile(r'HelpMessageOpt\(\"(\-[^\"=]+?)(?:=|\")')
  # list unsupported, deprecated and duplicate args as they need no documentation
  SET_DOC_OPTIONAL = set(['-rpcssl', '-benchmark', '-h', '-help', '-socks', '-tor', '-debugnet', '-whitelistalwaysrelay', '-prematurewitness', '-walletprematurewitness', '-promiscuousmempoolflags', '-blockminsize', '-sendfreetransactions', '-checklevel', '-liquidityprovider', '-anonymizegauntletamount'])
  
  def main():
      used = check_output(CMD_GREP_ARGS, shell=True, universal_newlines=True)
      docd = check_output(CMD_GREP_DOCS, shell=True, universal_newlines=True)
  
      args_used = set(re.findall(re.compile(REGEX_ARG), used))
      args_docd = set(re.findall(re.compile(REGEX_DOC), docd)).union(SET_DOC_OPTIONAL)
      args_need_doc = args_used.difference(args_docd)
      args_unknown = args_docd.difference(args_used)
  
      print("Args used        : {}".format(len(args_used)))
      print("Args documented  : {}".format(len(args_docd)))
      print("Args undocumented: {}".format(len(args_need_doc)))
      print(args_need_doc)
      print("Args unknown     : {}".format(len(args_unknown)))
      print(args_unknown)
  
      sys.exit(len(args_need_doc))
  
  
  if __name__ == "__main__":
      main()
  