check_BIDS.m

function check_BIDS(input_dir)
% 
% check for existing BIDS directory structure
%  
% this function checks if a subdirectory "BIDS" exists in the 
% current subject's folder
%
% if yes, user will be asked for permission to overwrite
%          
% file history:
% created M. Czisch & F. Binder 8.11.2017


cd(input_dir)
current_dir = pwd;

if exist('BIDS')
    
    fprintf('\n\nWARNING: subdirectory tmp_BIDS already exists\n');
    prompt = 'should the old file be deleted? (y/n):  ';
    str = input(prompt,'s');
    if strcmp(str,'y')
        cmd_str = ['rm -rf ', current_dir, '/BIDS']; system(cmd_str);
    else
        error('ERROR: old files will not be removed - programm terminates');
    end
    
end