Create pacman hook to delete cache

[dminca]

• according to Clearing the package cache info, one can create a hook that only keeps the current version of installed package and the previous one in cache
• create a pacman hook that deletes previous versions of packages, and only keeps the current and 1 pre-version of package
• the man alpm-hooks(5) provides all the possible options
• according to this thread | bbs.achlinux.org a pacman hook looks like this:

# hook-example1.hook
[Trigger]
Operation = Upgrade
Operation = Install
Operation = Remove
Type = Package
Target = *

[Action]
Description = Cleaning pacman cache...
When = PostTransaction
Exec = /usr/bin/paccache -r 


# hook-example2.hook
[Trigger]
Operation = Remove
Operation = Install
Operation = Upgrade
Type = Package
Target = *

[Action]
Description = Keep the last cache and the currently installed.
When = PostTransaction
Exec = /usr/bin/paccache -rvk2