I have a large directory tree with lots of files.
I would like to re-create the directory structure in a new location, but only the directories, not the files.
cp's man page, but don't see an argument that will help.
Taken from @whitequark's answer to to this question: Copy directory structure without copying files, on Mac OS X
Found this as have hit a similar need. With a new enough version of rsync, that's your best bet.
If you don't have a recent version of rsync, then this does the trick:
(A variant of this can be used for permission mirroring)