This is a set of pacman hooks and script that automatically causes snapper to perform a pre and post snapshot before and after pacman transactions, similar to how YaST does with OpenSuse. This provides a simple way to undo changes to a system after a pacman transaction.
snap-pac package using pacman.
For instructions on how to install without pacman, see the documentation.
Most likely, configuration is not needed. By default, the snapper configuration named
root will have pre/post snapshots taken for every pacman transaction.
For more information on configuring snap-pac, see the documentation.
See the documentation here or
man 8 snap-pac
After reviewing the documentation, check the issues page and file a new issue if your problem is not covered.