ASCII Library for Creating “Pretty” Directory Trees?

Question

Is there some *nix tool or perl/php library that will let you easily create directory tree visualizations that look like the following?

www
|-- private
|             


        

Answer 1

Not a library per se, but this little utility is handy for generating quick tree graphs without leaving the browser: https://tree.nathanfriend.io/

Disclaimer: I'm the author :).