Eli Schwartz authored Oct 27, 2019 and Allan McRae committed Oct 30, 2019

Exclude files with hardlinks when cat'ing all the files, and do a second
run to look at each file with hardlinks, keep track of the ones we've
already operated on, and only cat each inode once. Then use "wc -c" to get
the size of all (deduplicated) files the same way we were already doing.

Original-patch-by: Ronan Pigott <rpigott@berkeley.edu>
Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>