Remove non-functional check owners script that pre-dated gerrit.

per-file warn.py,checkowners.py = chh@google.com

#!/usr/bin/python

"""Parse and check syntax errors of a given OWNERS file."""

import argparse

import re

import sys

import urllib.request, urllib.parse, urllib.error

import urllib.request, urllib.error, urllib.parse

parser = argparse.ArgumentParser(description='Check OWNERS file syntax')

parser.add_argument('-v', '--verbose', dest='verbose',

                    action='store_true', default=False,

                    help='Verbose output to debug')

parser.add_argument('-c', '--check_address', dest='check_address',

                    action='store_true', default=False,

                    help='Check email addresses')

parser.add_argument(dest='owners', metavar='OWNERS', nargs='+',

                    help='Path to OWNERS file')

args = parser.parse_args()

gerrit_server = 'https://android-review.googlesource.com'

checked_addresses = {}

def echo(msg):

  if args.verbose:

    print(msg)

def find_address(address):

  if address not in checked_addresses:

    request = (gerrit_server + '/accounts/?n=1&q=email:'

               + urllib.parse.quote(address))

    echo('Checking email address: ' + address)

    result = urllib.request.urlopen(request).read()

    checked_addresses[address] = result.find('"_account_id":') >= 0

    if checked_addresses[address]:

      echo('Found email address: ' + address)

  return checked_addresses[address]

def check_address(fname, num, address):

  if find_address(address):

    return 0

  print('%s:%d: ERROR: unknown email address: %s' % (fname, num, address))

  return 1

def main():

  # One regular expression to check all valid lines.

  noparent = 'set +noparent'

  email = '([^@ ]+@[^ @]+|\\*)'

  emails = '(%s( *, *%s)*)' % (email, email)

  file_directive = 'file: *([^ :]+ *: *)?[^ ]+'

  directive = '(%s|%s|%s)' % (emails, noparent, file_directive)

  glob = '[a-zA-Z0-9_\\.\\-\\*\\?]+'

  globs = '(%s( *, *%s)*)' % (glob, glob)

  perfile = 'per-file +' + globs + ' *= *' + directive

  include = 'include +([^ :]+ *: *)?[^ ]+'

  pats = '(|%s|%s|%s|%s|%s)$' % (noparent, email, perfile, include, file_directive)

  patterns = re.compile(pats)

  address_pattern = re.compile('([^@ ]+@[^ @]+)')

  perfile_pattern = re.compile('per-file +.*=(.*)')

  error = 0

  for fname in args.owners:

    echo('Checking file: ' + fname)

    num = 0

    for line in open(fname, 'r'):

      num += 1

      stripped_line = re.sub('#.*$', '', line).strip()

      if not patterns.match(stripped_line):

        error += 1

        print('%s:%d: ERROR: unknown line [%s]' % (fname, num, line.strip()))

      elif args.check_address:

        if perfile_pattern.match(stripped_line):

          for addr in perfile_pattern.match(stripped_line).group(1).split(','):

            a = addr.strip()

            if a and a != '*':

              error += check_address(fname, num, addr.strip())

        elif address_pattern.match(stripped_line):

          error += check_address(fname, num, stripped_line)

  sys.exit(error)

if __name__ == '__main__':

  main()