You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: spm_standalone.m
    path of file: ./repos/bspm/thirdparty/spm8
    
    the code of the file until where you have to start completion: function spm_standalone(varargin)
% A function to be compiled, which will run a standalone SPM.
%
% See MATLAB Compiler: http://www.mathworks.com/products/compiler/
% See also config/spm_make_standalone.m
%__________________________________________________________________________
% Copyright (C) 2010-2011 Wellcome Trust Centre for Neuroimaging

% Guillaume Flandin
% $Id: spm_standalone.m 4294 2011-04-06 18:03:20Z guillaume $ 

    
function spm_standalone(varargin)
% A function to be compiled, which will run a standalone SPM.
%
% See MATLAB Compiler: http://www.mathworks.com/products/compiler/
% See also config/spm_make_standalone.m
%__________________________________________________________________________
% Copyright (C) 2010-2011 Wellcome Trust Centre for Neuroimaging

% Guillaume Flandin
% $Id: spm_standalone.m 4294 2011-04-06 18:03:20Z guillaume $ 

[v,r] = spm('Ver');
fprintf('%s (%s): %s\n',v,r,spm('Dir'));

if ~nargin, action = ''; else action = varargin{1}; end