get list of all files in a folder (and subfolders)

// Given a path to a folder on disk, gets all files ending in "ext" 
Function/S findFiles(path, ext[, recurse])
// By default, subfolders are searched. Turn off with recurse=0.
// 2017-05-02, joel corbin
//
    string path, ext; variable recurse
    
    if (paramIsDefault(recurse))
        recurse=1
    endif
    path = sanitizeFilePath(path)                                               // may not work in extreme cases
    
    string fileList=""
    string files=""
    string pathName = "tmpPath"
    string folders =path+";"                                                    // Remember the full path of all folders in "path" & search each for "ext" files
    string fldr
    do
        fldr = stringFromList(0,folders)
        NewPath/O/Q $pathName, fldr                                             // sets S_path=$path, and creates the symbolic path needed for indexedFile()
        PathInfo $pathName
        files = indexedFile($pathName,-1,ext)                                   // get file names
        if (strlen(files))
            files = fldr+":"+ replaceString(";", removeEnding(files), ";"+fldr+":") // add the full path (folders 'fldr') to every file in the list
            fileList = addListItem(files,fileList)
        endif
        if (recurse)
            folders += indexedDir($pathName,-1,1)                               // get full folder paths
        endif
        folders = removeFromList(fldr, folders)                                 // Remove the folder we just looked at
    while (strlen(folders))
    KillPath $pathName
    return fileList
End
 
static function /s sanitizeFilePath(path)
    // Avoid annoyances with escape characters when using Microsoft Windows directories.
    
    string path
    path = replaceString("\t", path, "\\t")
    path = replaceString("\r", path, "\\r")
    path = replaceString("\n", path, "\\n")
 
    return path
end