Runs "du", and displays the output as a tree of file space used.

Use:
    treedu [-h] [-maxdepth (1..9)] [-du_opts] [--] [path ...]

The default path is ".", the current directory.
The default command is "du", but this can be overridden by setting the
environment variable TREEDU to another du-ish command.

Options (must not be combined):
    -h:		print this help message, then exit.
    -maxdepth:	only show dirs maxdepth levels deep.  -1 or -2 is very useful.
    -du_opts:	any other options (e.g. -k) are passed to the du command.