Print Folders and Files Recursively

//  PrintFoldersAndFiles(pathName, extension, recurse, level)
//  Shows how to recursively find all files in a folder and subfolders.
//  pathName is the name of an Igor symbolic path that you created using NewPath or the Misc->New Path menu item.
//  extension is a file name extension like ".txt" or "????" for all files.
//  recurse is 1 to recurse or 0 to list just the top-level folder.
//  level is the recursion level - pass 0 when calling PrintFoldersAndFiles.
Function PrintFoldersAndFiles(pathName, extension, recurse, level)
    String pathName     // Name of symbolic path in which to look for folders and files.
    String extension            // File name extension (e.g., ".txt") or "????" for all files.
    Variable recurse        // True to recurse (do it for subfolders too).
    Variable level          // Recursion level. Pass 0 for the top level.
    
    Variable folderIndex, fileIndex
    String prefix
    
    // Build a prefix (a number of tabs to indicate the folder level by indentation)
    prefix = ""
    folderIndex = 0
    do
        if (folderIndex >= level)
            break
        endif
        prefix += "\t"                  // Indent one more tab
        folderIndex += 1
    while(1)
    
    // Print folder
    String path
    PathInfo $pathName              // Sets S_path
    path = S_path
    Printf "%s%s\r", prefix, path
 
    // Print files
    fileIndex = 0
    do
        String fileName
        fileName = IndexedFile($pathName, fileIndex, extension)
        if (strlen(fileName) == 0)
            break
        endif
        Printf "%s\t%s%s\r", prefix, path, fileName
        fileIndex += 1
    while(1)
    
    if (recurse)                                    // Do we want to go into subfolder?
        folderIndex = 0
        do
            path = IndexedDir($pathName, folderIndex, 1)
            if (strlen(path) == 0)
                break                           // No more folders
            endif
 
            String subFolderPathName = "tempPrintFoldersPath_" + num2istr(level+1)
            
            // Now we get the path to the new parent folder
            String subFolderPath
            subFolderPath = path
            
            NewPath/Q/O $subFolderPathName, subFolderPath
            PrintFoldersAndFiles(subFolderPathName, extension, recurse, level+1)
            KillPath/Z $subFolderPathName
            
            folderIndex += 1
        while(1)
    endif
End