#!/usr/bin/env python
#
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.
#
#
#
# run_tests.py - run the tests in the regression test suite.
#

'''usage: python run_tests.py
            [--verbose] [--log-to-stdout] [--cleanup] [--parallel]
            [--url=<base-url>] [--http-library=<http-library>] [--enable-sasl]
            [--fs-type=<fs-type>] [--fsfs-packing] [--fsfs-sharding=<n>]
            [--list] [--milestone-filter=<regex>] [--mode-filter=<type>]
            [--server-minor-version=<version>] [--http-proxy=<host>:<port>]
            [--httpd-version=<version>]
            [--config-file=<file>] [--ssl-cert=<file>]
            <abs_srcdir> <abs_builddir>
            <prog ...>

The optional flags and the first two parameters are passed unchanged
to the TestHarness constructor.  All other parameters are names of
test programs.

Each <prog> should be the full path (absolute or from the current directory)
and filename of a test program, optionally followed by '#' and a comma-
separated list of test numbers; the default is to run all the tests in it.
'''

# A few useful constants
SVN_VER_MINOR = 8

import os, re, subprocess, sys, imp, threading
from datetime import datetime

import getopt
try:
  my_getopt = getopt.gnu_getopt
except AttributeError:
  my_getopt = getopt.getopt

# Ensure the compiled C tests use a known locale (Python tests set the locale
# explicitly).
os.environ['LC_ALL'] = 'C'

class TextColors:
  '''Some ANSI terminal constants for output color'''
  ENDC = '\033[0;m'
  FAILURE = '\033[1;31m'
  SUCCESS = '\033[1;32m'

  @classmethod
  def disable(cls):
    cls.ENDC = ''
    cls.FAILURE = ''
    cls.SUCCESS = ''


def _get_term_width():
  'Attempt to discern the width of the terminal'
  # This may not work on all platforms, in which case the default of 80
  # characters is used.  Improvements welcomed.

  def ioctl_GWINSZ(fd):
    try:
      import fcntl, termios, struct, os
      cr = struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234'))
    except:
      return None
    return cr

  cr = None
  if not cr:
    try:
      cr = (os.environ['SVN_MAKE_CHECK_LINES'],
            os.environ['SVN_MAKE_CHECK_COLUMNS'])
    except:
      cr = None
  if not cr:
    cr = ioctl_GWINSZ(0) or ioctl_GWINSZ(1) or ioctl_GWINSZ(2)
  if not cr:
    try:
      fd = os.open(os.ctermid(), os.O_RDONLY)
      cr = ioctl_GWINSZ(fd)
      os.close(fd)
    except:
      pass
  if not cr:
    try:
      cr = (os.environ['LINES'], os.environ['COLUMNS'])
    except:
      cr = None
  if not cr:
    # Default
    if sys.platform == 'win32':
      cr = (25, 79)
    else:
      cr = (25, 80)
  return int(cr[1])


class TestHarness:
  '''Test harness for Subversion tests.
  '''

  def __init__(self, abs_srcdir, abs_builddir, logfile, faillogfile,
               base_url=None, fs_type=None, http_library=None,
               server_minor_version=None, verbose=None,
               cleanup=None, enable_sasl=None, parallel=None, config_file=None,
               fsfs_sharding=None, fsfs_packing=None,
               list_tests=None, svn_bin=None, mode_filter=None,
               milestone_filter=None, set_log_level=None, ssl_cert=None,
               http_proxy=None, httpd_version=None):
    '''Construct a TestHarness instance.

    ABS_SRCDIR and ABS_BUILDDIR are the source and build directories.
    LOGFILE is the name of the log file. If LOGFILE is None, let tests
    print their output to stdout and stderr, and don't print a summary
    at the end (since there's no log file to analyze).
    BASE_URL is the base url for DAV tests.
    FS_TYPE is the FS type for repository creation.
    HTTP_LIBRARY is the HTTP library for DAV-based communications.
    SERVER_MINOR_VERSION is the minor version of the server being tested.
    SVN_BIN is the path where the svn binaries are installed.
    MODE_FILTER restricts the TestHarness to tests with the expected mode
    XFail, Skip, Pass, or All tests (default).  MILESTONE_FILTER is a
    string representation of a valid regular expression pattern; when used
    in conjunction with LIST_TESTS, the only tests that are listed are
    those with an associated issue in the tracker which has a target
    milestone that matches the regex.
    '''
    self.srcdir = abs_srcdir
    self.builddir = abs_builddir
    self.logfile = logfile
    self.faillogfile = faillogfile
    self.base_url = base_url
    self.fs_type = fs_type
    self.http_library = http_library
    self.server_minor_version = server_minor_version
    # If you change the below condition then change in
    # ../subversion/tests/cmdline/svntest/main.py too.
    if server_minor_version is not None:
      if int(server_minor_version) not in range(3, 1+SVN_VER_MINOR):
        sys.stderr.write("Test harness only supports server minor versions 3-%d\n"
                         % SVN_VER_MINOR)
        sys.exit(1)
    self.verbose = verbose
    self.cleanup = cleanup
    self.enable_sasl = enable_sasl
    self.parallel = parallel
    self.fsfs_sharding = fsfs_sharding
    self.fsfs_packing = fsfs_packing
    if fsfs_packing is not None and fsfs_sharding is None:
      raise Exception('--fsfs-packing requires --fsfs-sharding')
    self.config_file = None
    if config_file is not None:
      self.config_file = os.path.abspath(config_file)
    self.list_tests = list_tests
    self.milestone_filter = milestone_filter
    self.set_log_level = set_log_level
    self.svn_bin = svn_bin
    self.mode_filter = mode_filter
    self.log = None
    self.ssl_cert = ssl_cert
    self.http_proxy = http_proxy
    self.httpd_version = httpd_version
    if not sys.stdout.isatty() or sys.platform == 'win32':
      TextColors.disable()

  def run(self, list):
    '''Run all test programs given in LIST. Print a summary of results, if
       there is a log file. Return zero iff all test programs passed.'''
    self._open_log('w')
    failed = 0
    for cnt, prog in enumerate(list):
      failed = self._run_test(prog, cnt, len(list)) or failed

    if self.log is None:
      return failed

    # Open the log in binary mode because it can contain binary data
    # from diff_tests.py's testing of svnpatch. This may prevent
    # readlines() from reading the whole log because it thinks it
    # has encountered the EOF marker.
    self._open_log('rb')
    log_lines = self.log.readlines()

    # Remove \r characters introduced by opening the log as binary
    if sys.platform == 'win32':
      log_lines = [x.replace('\r', '') for x in log_lines]

    # Print the results, from least interesting to most interesting.

    # Helper for Work-In-Progress indications for XFAIL tests.
    wimptag = ' [[WIMP: '
    def printxfail(x):
      wip = x.find(wimptag)
      if 0 > wip:
        sys.stdout.write(x)
      else:
        sys.stdout.write('%s\n       [[%s'
                         % (x[:wip], x[wip + len(wimptag):]))

    if self.list_tests:
      passed = [x for x in log_lines if x[8:13] == '     ']
    else:
      passed = [x for x in log_lines if x[:6] == 'PASS: ']

    if self.list_tests:
      skipped = [x for x in log_lines if x[8:12] == 'SKIP']
    else:
      skipped = [x for x in log_lines if x[:6] == 'SKIP: ']

    if skipped and not self.list_tests:
      print('At least one test was SKIPPED, checking ' + self.logfile)
      for x in skipped:
        sys.stdout.write(x)

    if self.list_tests:
      xfailed = [x for x in log_lines if x[8:13] == 'XFAIL']
    else:
      xfailed = [x for x in log_lines if x[:6] == 'XFAIL:']
    if xfailed and not self.list_tests:
      print('At least one test XFAILED, checking ' + self.logfile)
      for x in xfailed:
        printxfail(x)

    xpassed = [x for x in log_lines if x[:6] == 'XPASS:']
    if xpassed:
      print('At least one test XPASSED, checking ' + self.logfile)
      for x in xpassed:
        printxfail(x)

    failed_list = [x for x in log_lines if x[:6] == 'FAIL: ']
    if failed_list:
      print('At least one test FAILED, checking ' + self.logfile)
      for x in failed_list:
        sys.stdout.write(x)

    # Print summaries, from least interesting to most interesting.
    if self.list_tests:
      print('Summary of test listing:')
    else:
      print('Summary of test results:')
    if passed:
      if self.list_tests:
        print('  %d test%s are set to PASS'
              % (len(passed), 's'*min(len(passed) - 1, 1)))
      else:
        print('  %d test%s PASSED'
              % (len(passed), 's'*min(len(passed) - 1, 1)))
    if skipped:
      if self.list_tests:
        print('  %d test%s are set as SKIP'
              % (len(skipped), 's'*min(len(skipped) - 1, 1)))
      else:
        print('  %d test%s SKIPPED'
              % (len(skipped), 's'*min(len(skipped) - 1, 1)))
    if xfailed:
      passwimp = [x for x in xfailed if 0 <= x.find(wimptag)]
      if passwimp:
        if self.list_tests:
          print('  %d test%s are set to XFAIL (%d WORK-IN-PROGRESS)'
                % (len(xfailed), 's'*min(len(xfailed) - 1, 1), len(passwimp)))
        else:
          print('  %d test%s XFAILED (%d WORK-IN-PROGRESS)'
                % (len(xfailed), 's'*min(len(xfailed) - 1, 1), len(passwimp)))
      else:
        if self.list_tests:
          print('  %d test%s are set as XFAIL'
                % (len(xfailed), 's'*min(len(xfailed) - 1, 1)))
        else:
          print('  %d test%s XFAILED'
                % (len(xfailed), 's'*min(len(xfailed) - 1, 1)))
    if xpassed:
      failwimp = [x for x in xpassed if 0 <= x.find(wimptag)]
      if failwimp:
        print('  %d test%s XPASSED (%d WORK-IN-PROGRESS)'
              % (len(xpassed), 's'*min(len(xpassed) - 1, 1), len(failwimp)))
      else:
        print('  %d test%s XPASSED'
              % (len(xpassed), 's'*min(len(xpassed) - 1, 1)))
    if failed_list:
      print('  %d test%s FAILED'
            % (len(failed_list), 's'*min(len(failed_list) - 1, 1)))

    # Copy the truly interesting verbose logs to a separate file, for easier
    # viewing.
    if xpassed or failed_list:
      faillog = open(self.faillogfile, 'wb')
      last_start_lineno = None
      last_start_re = re.compile('^(FAIL|SKIP|XFAIL|PASS|START|CLEANUP|END):')
      for lineno, line in enumerate(log_lines):
        # Iterate the lines.  If it ends a test we're interested in, dump that
        # test to FAILLOG.  If it starts a test (at all), remember the line
        # number (in case we need it later).
        if line in xpassed or line in failed_list:
          faillog.write('[[[\n')
          faillog.writelines(log_lines[last_start_lineno : lineno+1])
          faillog.write(']]]\n\n')
        if last_start_re.match(line):
          last_start_lineno = lineno + 1
      faillog.close()
    elif os.path.exists(self.faillogfile):
      print("WARNING: no failures, but '%s' exists from a previous run."
            % self.faillogfile)

    # Summary.
    if failed or xpassed or failed_list:
      print("SUMMARY: Some tests failed.\n")
    else:
      print("SUMMARY: All tests successful.\n")

    self._close_log()
    return failed

  def _open_log(self, mode):
    'Open the log file with the required MODE.'
    if self.logfile:
      self._close_log()
      self.log = open(self.logfile, mode)

  def _close_log(self):
    'Close the log file.'
    if not self.log is None:
      self.log.close()
      self.log = None

  def _run_c_test(self, prog, test_nums, dot_count):
    'Run a c test, escaping parameters as required.'
    progdir, progbase = os.path.split(prog)

    if self.list_tests and self.milestone_filter:
      print 'WARNING: --milestone-filter option does not currently work with C tests'

    if os.access(progbase, os.X_OK):
      progname = './' + progbase
      cmdline = [progname,
                 '--srcdir=' + os.path.join(self.srcdir, progdir)]
      if self.config_file is not None:
        cmdline.append('--config-file=' + self.config_file)
    else:
      print("Don't know what to do about " + progbase)
      sys.exit(1)

    if self.verbose is not None:
      cmdline.append('--verbose')
    if self.cleanup is not None:
      cmdline.append('--cleanup')
    if self.fs_type is not None:
      cmdline.append('--fs-type=' + self.fs_type)
    if self.server_minor_version is not None:
      cmdline.append('--server-minor-version=' + self.server_minor_version)
    if self.list_tests is not None:
      cmdline.append('--list')
    if self.mode_filter is not None:
      cmdline.append('--mode-filter=' + self.mode_filter)

    if test_nums:
      test_nums = test_nums.split(',')
      cmdline.extend(test_nums)

    if test_nums:
      total = len(test_nums)
    else:
      total_cmdline = [cmdline[0], '--list']
      prog = subprocess.Popen(total_cmdline, stdout=subprocess.PIPE)
      lines = prog.stdout.readlines()
      total = len(lines) - 2

    # This has to be class-scoped for use in the progress_func()
    self.dots_written = 0
    def progress_func(completed):
      if not self.log or self.dots_written >= dot_count:
        return
      dots = (completed * dot_count) / total
      if dots > dot_count:
        dots = dot_count
      dots_to_write = dots - self.dots_written
      os.write(sys.stdout.fileno(), '.' * dots_to_write)
      self.dots_written = dots

    tests_completed = 0
    prog = subprocess.Popen(cmdline, stdout=subprocess.PIPE,
                            stderr=self.log)
    line = prog.stdout.readline()
    while line:
      if sys.platform == 'win32':
        # Remove CRs inserted because we parse the output as binary.
        line = line.replace('\r', '')

      # If using --log-to-stdout self.log in None.
      if self.log:
        self.log.write(line)

      if line.startswith('PASS') or line.startswith('FAIL') \
           or line.startswith('XFAIL') or line.startswith('XPASS') \
           or line.startswith('SKIP'):
        tests_completed += 1
        progress_func(tests_completed)

      line = prog.stdout.readline()

    # If we didn't run any tests, still print out the dots
    if not tests_completed:
      os.write(sys.stdout.fileno(), '.' * dot_count)

    prog.wait()
    return prog.returncode

  def _run_py_test(self, prog, test_nums, dot_count):
    'Run a python test, passing parameters as needed.'
    progdir, progbase = os.path.split(prog)

    old_path = sys.path[:]
    sys.path = [progdir] + sys.path

    try:
      prog_mod = imp.load_module(progbase[:-3], open(prog, 'r'), prog,
                                 ('.py', 'U', imp.PY_SOURCE))
    except:
      print("Don't know what to do about " + progbase)
      sys.exit(1)

    import svntest.main

    # set up our options
    svntest.main.create_default_options()
    if self.base_url is not None:
      svntest.main.options.test_area_url = self.base_url
    if self.enable_sasl is not None:
      svntest.main.options.enable_sasl = True
    if self.parallel is not None:
      svntest.main.options.parallel = svntest.main.default_num_threads
    if self.config_file is not None:
      svntest.main.options.config_file = self.config_file
    if self.verbose is not None:
      svntest.main.options.verbose = True
    if self.cleanup is not None:
      svntest.main.options.cleanup = True
    if self.fs_type is not None:
      svntest.main.options.fs_type = self.fs_type
    if self.http_library is not None:
      svntest.main.options.http_library = self.http_library
    if self.server_minor_version is not None:
      svntest.main.options.server_minor_version = int(self.server_minor_version)
    if self.list_tests is not None:
      svntest.main.options.list_tests = True
    if self.milestone_filter is not None:
      svntest.main.options.milestone_filter = self.milestone_filter
    if self.set_log_level is not None:
      # Somehow the logger is not setup correctly from win-tests.py, so
      # setting the log level would fail. ### Please fix
      if svntest.main.logger is None:
        import logging
        svntest.main.logger = logging.getLogger()
      svntest.main.logger.setLevel(self.set_log_level)
    if self.svn_bin is not None:
      svntest.main.options.svn_bin = self.svn_bin
    if self.fsfs_sharding is not None:
      svntest.main.options.fsfs_sharding = int(self.fsfs_sharding)
    if self.fsfs_packing is not None:
      svntest.main.options.fsfs_packing = self.fsfs_packing
    if self.mode_filter is not None:
      svntest.main.options.mode_filter = self.mode_filter
    if self.ssl_cert is not None:
      svntest.main.options.ssl_cert = self.ssl_cert
    if self.http_proxy is not None:
      svntest.main.options.http_proxy = self.http_proxy
    if self.httpd_version is not None:
      svntest.main.options.httpd_version = self.httpd_version

    svntest.main.options.srcdir = self.srcdir

    # setup the output pipes
    if self.log:
      sys.stdout.flush()
      sys.stderr.flush()
      self.log.flush()
      old_stdout = os.dup(sys.stdout.fileno())
      old_stderr = os.dup(sys.stderr.fileno())
      os.dup2(self.log.fileno(), sys.stdout.fileno())
      os.dup2(self.log.fileno(), sys.stderr.fileno())

    # These have to be class-scoped for use in the progress_func()
    self.dots_written = 0
    self.progress_lock = threading.Lock()
    def progress_func(completed, total):
      """Report test suite progress. Can be called from multiple threads
         in parallel mode."""
      if not self.log:
        return
      dots = (completed * dot_count) / total
      if dots > dot_count:
        dots = dot_count
      self.progress_lock.acquire()
      if self.dots_written < dot_count:
        dots_to_write = dots - self.dots_written
        self.dots_written = dots
        os.write(old_stdout, '.' * dots_to_write)
      self.progress_lock.release()

    serial_only = hasattr(prog_mod, 'serial_only') and prog_mod.serial_only

    # run the tests
    svntest.testcase.TextColors.disable()

    if self.list_tests:
      prog_f = None
    else:
      prog_f = progress_func

    if test_nums:
      test_selection = [test_nums]
    else:
      test_selection = []

    try:
      failed = svntest.main.execute_tests(prog_mod.test_list,
                                          serial_only=serial_only,
                                          test_name=progbase,
                                          progress_func=prog_f,
                                          test_selection=test_selection)
    except svntest.Failure:
      if self.log:
        os.write(old_stdout, '.' * dot_count)
      failed = True

    # restore some values
    sys.path = old_path
    if self.log:
      sys.stdout.flush()
      sys.stderr.flush()
      os.dup2(old_stdout, sys.stdout.fileno())
      os.dup2(old_stderr, sys.stderr.fileno())
      os.close(old_stdout)
      os.close(old_stderr)

    return failed

  def _run_test(self, prog, test_nr, total_tests):
    "Run a single test. Return the test's exit code."

    if self.log:
      log = self.log
    else:
      log = sys.stdout

    test_nums = None
    if '#' in prog:
      prog, test_nums = prog.split('#')

    progdir, progbase = os.path.split(prog)
    if self.log:
      # Using write here because we don't want even a trailing space
      test_info = '[%s/%d] %s' % (str(test_nr + 1).zfill(len(str(total_tests))),
                                  total_tests, progbase)
      if self.list_tests:
        sys.stdout.write('Listing tests in %s' % (test_info, ))
      else:
        sys.stdout.write('%s' % (test_info, ))
      sys.stdout.flush()
    else:
      # ### Hack for --log-to-stdout to work (but not print any dots).
      test_info = ''

    if self.list_tests:
      log.write('LISTING: %s\n' % progbase)
    else:
      log.write('START: %s\n' % progbase)

    log.flush()

    start_time = datetime.now()

    progabs = os.path.abspath(os.path.join(self.srcdir, prog))
    old_cwd = os.getcwd()
    line_length = _get_term_width()
    dots_needed = line_length \
                    - len(test_info) \
                    - len('success')
    try:
      os.chdir(progdir)
      if progbase[-3:] == '.py':
        failed = self._run_py_test(progabs, test_nums, dots_needed)
      else:
        failed = self._run_c_test(prog, test_nums, dots_needed)
    except:
      os.chdir(old_cwd)
      raise
    else:
      os.chdir(old_cwd)

    # We always return 1 for failed tests. Some other failure than 1
    # probably means the test didn't run at all and probably didn't
    # output any failure info. In that case, log a generic failure message.
    # ### Even if failure==1 it could be that the test didn't run at all.
    if failed and failed != 1:
      if self.log:
        log.write('FAIL:  %s: Unknown test failure; see tests.log.\n' % progbase)
        log.flush()
      else:
        log.write('FAIL:  %s: Unknown test failure.\n' % progbase)

    if not self.list_tests:
      # Log the elapsed time.
      elapsed_time = str(datetime.now() - start_time)
      log.write('END: %s\n' % progbase)
      log.write('ELAPSED: %s %s\n' % (progbase, elapsed_time))

    log.write('\n')

    # If we are only listing the tests just add a newline, otherwise if
    # we printed a "Running all tests in ..." line, add the test result.
    if self.log:
      if self.list_tests:
        print ''
      else:
        if failed:
          print(TextColors.FAILURE + 'FAILURE' + TextColors.ENDC)
        else:
          print(TextColors.SUCCESS + 'success' + TextColors.ENDC)

    return failed


def main():
  try:
    opts, args = my_getopt(sys.argv[1:], 'u:f:vc',
                           ['url=', 'fs-type=', 'verbose', 'cleanup',
                            'http-library=', 'server-minor-version=',
                            'fsfs-packing', 'fsfs-sharding=',
                            'enable-sasl', 'parallel', 'config-file=',
                            'log-to-stdout', 'list', 'milestone-filter=',
                            'mode-filter=', 'set-log-level=', 'ssl-cert=',
                            'http-proxy=', 'httpd-version='])
  except getopt.GetoptError:
    args = []

  if len(args) < 3:
    print(__doc__)
    sys.exit(2)

  base_url, fs_type, verbose, cleanup, enable_sasl, http_library, \
    server_minor_version, fsfs_sharding, fsfs_packing, parallel, \
    config_file, log_to_stdout, list_tests, mode_filter, milestone_filter, \
    set_log_level, ssl_cert, http_proxy, httpd_version = \
            None, None, None, None, None, None, None, None, None, None, None, \
            None, None, None, None, None, None, None, None
  for opt, val in opts:
    if opt in ['-u', '--url']:
      base_url = val
    elif opt in ['-f', '--fs-type']:
      fs_type = val
    elif opt in ['--http-library']:
      http_library = val
    elif opt in ['--fsfs-sharding']:
      fsfs_sharding = int(val)
    elif opt in ['--fsfs-packing']:
      fsfs_packing = 1
    elif opt in ['--server-minor-version']:
      server_minor_version = val
    elif opt in ['-v', '--verbose']:
      verbose = 1
    elif opt in ['-c', '--cleanup']:
      cleanup = 1
    elif opt in ['--enable-sasl']:
      enable_sasl = 1
    elif opt in ['--parallel']:
      parallel = 1
    elif opt in ['--config-file']:
      config_file = val
    elif opt in ['--log-to-stdout']:
      log_to_stdout = 1
    elif opt in ['--list']:
      list_tests = 1
    elif opt in ['--milestone-filter']:
      milestone_filter = val
    elif opt in ['--mode-filter']:
      mode_filter = val
    elif opt in ['--set-log-level']:
      set_log_level = val
    elif opt in ['--ssl-cert']:
      ssl_cert = val
    elif opt in ['--http-proxy']:
      http_proxy = val
    elif opt in ['--httpd-version']:
      httpd_version = val
    else:
      raise getopt.GetoptError

  if log_to_stdout:
    logfile = None
    faillogfile = None
  else:
    logfile = os.path.abspath('tests.log')
    faillogfile = os.path.abspath('fails.log')

  th = TestHarness(args[0], args[1], logfile, faillogfile,
                   base_url, fs_type, http_library, server_minor_version,
                   verbose, cleanup, enable_sasl, parallel, config_file,
                   fsfs_sharding, fsfs_packing, list_tests,
                   mode_filter=mode_filter, milestone_filter=milestone_filter,
                   set_log_level=set_log_level, ssl_cert=ssl_cert,
                   http_proxy=http_proxy, httpd_version=httpd_version)

  failed = th.run(args[2:])
  if failed:
    sys.exit(1)


# Run main if not imported as a module
if __name__ == '__main__':
  main()
