popd method

@override Shell popd()

Pop the current directory to get the previous shell throw State error if nothing in the stack

Implementation

@override
Shell popd() {
  if (_parentShell == null) {
    throw StateError('no previous shell');
  }
  if (_options.commandVerbose) {
    stdout.writeln('\$ cd ${_parentShell!._workingDirectoryPath}');
  }
  return _parentShell!;
}