def main()

in build/get_syzygy_binaries.py [0:0]

• 27 lines of code
• 17 McCabe index (conditional complexity)

def main():
  options = _ParseCommandLine()

  if options.dry_run:
    _LOGGER.debug('Performing a dry-run.')

  # We only care about Windows platforms, as the Syzygy binaries aren't used
  # elsewhere. However, there was a short period of time where this script
  # wasn't gated on OS types, and those OSes downloaded and installed binaries.
  # This will cleanup orphaned files on those operating systems.
  if sys.platform not in ('win32', 'cygwin'):
    if options.no_cleanup:
      _LOGGER.debug('Skipping usual cleanup for non-Windows platforms.')
    else:
      return _RemoveOrphanedFiles(options)

  # Load the current installation state, and validate it against the
  # requested installation.
  state, is_consistent = _GetCurrentState(options.revision, options.output_dir)

  # Decide whether or not an install is necessary.
  if options.force:
    _LOGGER.debug('Forcing reinstall of binaries.')
  elif is_consistent:
    # Avoid doing any work if the contents of the directory are consistent.
    _LOGGER.debug('State unchanged, no reinstall necessary.')
    return

  # Under normal logging this is the only only message that will be reported.
  _LOGGER.info('Installing revision %s Syzygy binaries.',
               options.revision[0:12])

  # Clean up the old state to begin with.
  deleted = []
  if options.overwrite:
    if os.path.exists(options.output_dir):
      # If overwrite was specified then take a heavy-handed approach.
      _LOGGER.debug('Deleting entire installation directory.')
      if not options.dry_run:
        _RmTree(options.output_dir)
  else:
    # Otherwise only delete things that the previous installation put in place,
    # and take care to preserve any local changes.
    deleted = _CleanState(options.output_dir, state, options.dry_run)

  # Install the new binaries. In a dry-run this will actually download the
  # archives, but it won't write anything to disk.
  state = _InstallBinaries(options, deleted)

  # Build and save the state for the directory.
  _SaveState(options.output_dir, state, options.dry_run)