Clear pacman cache

[Temet79]

Hello Antiz,

I would add a pull request but I actually don't know how it works :(

I added this to the script on my own to clear the cache, I was doing manually after updates.
Feel free to add and improve you want.

# Definition of the clear_paccache function: Remove previous versions of packages from clear_paccache
clear_paccache() {
  cache_old=$(paccache -dk2 | sed -n 's/.*: \([0-9]*\) candidate.*/\1/p')
  [ -z "$cache_old" ] && cache_old=0
  cache_uninstalled=$(paccache -duk0 | sed -n 's/.*: \([0-9]*\) candidate.*/\1/p')
  [ -z "$cache_uninstalled" ] && cache_uninstalled=0
  cache_total=$(($cache_old+$cache_uninstalled))

  if [ $cache_total -gt 0 ]; then
    if [ $cache_total -eq 1 ]; then
      read -rp $'Would you like to remove the older package version stored in cache? [Y/n] ' answer
    elif [ $cache_total -gt 1 ]; then
      echo $cache_total older packages versions are stored in cache.
      read -rp $'Would you like to remove them? [Y/n] ' answer
    fi

    case "${answer}" in
      [Yy]|"")
        "${su_cmd}" paccache -rk2
        "${su_cmd}" paccache -ruk0
      ;;
    esac
  fi
}

[Antiz96]

Hello,

Thanks a lot for the great suggestion, and the example!
I'm currently working on implementing it, taking inspiration from your code ;)

[Antiz96]

Feature implemented in #71.
I set the number of kept cached versions to 3 instead of 2 though. It is the default value applied by paccache and feels like a sane/safe behavior.

I will release v1.9.0 in a moment, including this new feature.
Thanks once again for the suggestion and the implementation example 😄

[Antiz96]

https://github.com/Antiz96/arch-update/releases/tag/v1.9.0

[Antiz96]

Hi,

Just in case, the latest v1.10.0 release now includes an optional arch-update.conf configuration file that allows you to enable/disable or modify certain options within the script, including the number of old and uninstalled packages to keep in pacman's cache.
So if you wanna get back to keeping only 2 old packages' version in pacman's cache, you can now specify it in your arch-update.conf 😉

The documentation for the new arch-update.conf is available in the README or in the arch-update.conf(5) man page.