Using Matlab Regex to insert "disclaimer" at begining of multiple codes within multiple subfolders

Question

I have a folder with multiple subfolders that all contain several files. I am looking to write a matlab code that will insert a commented out "disclaimer" on the top of every relevant code [c, python (.py not .pyc), .urdf, .xml (.launch, .xacro, .config)]

My current thought process is to first list out every subfolder within the main folder. Then search within each subfolder for the relevant codes. If a relevant code is found, the disclaimer is commented in the top of the code... (each language has a different disclaimer)

I am having a hard time piecing this all together.. any help?

data_dir = 'C:thedirectorytomainfolder':

topLevelFolder = data_dir;
if topLevelFolder == 0
    return;
end

% Get list of all subfolders.
allSubFolders = genpath(topLevelFolder);
remain = allSubFolders;
listOfFolderNames = {};

while true
    [singleSubFolder, remain] = strtok(remain, ';');
    if isempty(singleSubFolder)
        break;
    end
    listOfFolderNames = [listOfFolderNames singleSubFolder];
end

numberOfFolders = length(listOfFolderNames)

%% Process all (wanted) files in those folders
for k = 1 : numberOfFolders
    % Get this folder and print it out.
    thisFolder = listOfFolderNames{k};
    fprintf('Processing folder %s\n', thisFolder);

    % Get .xml files.
    filePattern = sprintf('%s/*.xml', thisFolder);
    baseFileNames = dir(filePattern);

filePattern = sprintf('%s/*.c', thisFolder);
baseFileNames = [baseFileNames; dir(filePattern)];

numberOfImageFiles = length(baseFileNames)

I'm having a hard time reading each relevant file and inserting the correct comment code at the beginning of the file... any help?

score 0 · Answer 1 · answered May 01 '15 at 19:23

Most of matlab's methods for reading text files assume you are trying to load in primarily numeric data but one of them might still work for you.

Sometimes it's easier to fopen the file and then read lines with fgetl of fread. Because you're doing low-level IO you have to test for the end of file too with while ~feof or somesuch. You could store each line in a cell array, prepend it with a cell array of your disclaimer and then write back out with fwrite, converting the cell back to a string with char.

It'll be pretty cumbersome. Does it have to be matlab? If you have the option it might be quicker to do it in a different language - it would be less than twenty lines in shell, and ruby/python/perl are all more geared up for text processing, which isn't matlab's strongest point.

Using Matlab Regex to insert "disclaimer" at begining of multiple codes within multiple subfolders

1 Answers1