Script and hook to clean pacman and yay cache

yaycache

#!/usr/bin/env bash

# Assuming yay is run by user with UID 1000
admin="$(id -nu 1000)"
cachedir="/home/$admin/.cache/yay"
removed="$(comm -23 <(basename -a $(find $cachedir -mindepth 1 -maxdepth 1 -type d) | sort) <(pacman -Qqm) | xargs -r printf "$cachedir/%s\n")"

# Remove yay cache for foreign packages that are not installed anymore
rm -rf $removed

pkgcache="$(find $cachedir -mindepth 1 -maxdepth 1 -type d | xargs -r printf "-c %s\n")"

for pkgdir in "$cachedir"/*/; do

    pkgname=$(basename "$pkgdir")

    # Remove untracked files (e. g. source/build files) excepting package files and main source files for installed version if non-git package
    if [[ ! "$pkgname" =~ ^.*-git$ ]]; then

        pkgver="$(pacman -Q $pkgname | cut -d ' ' -f2 | cut -d '-' -f1 | cut -d ':' -f2)"

        cd "$pkgdir"
        rm -f $(git ls-files --others | grep -v -e '^.*\.pkg\.tar.*$' -e '^.*/$' -e "^.*$pkgver.*$" | xargs -r printf "$pkgdir/%s\n")

    fi

    rm -rf "$pkgdir"/src/

done

# Remove everything for uninstalled foreign packages, keep latest version for uninstalled native packages, keep two latest versions for installed packages
/usr/bin/paccache -qruk0 $pkgcache
/usr/bin/paccache -qruk1
/usr/bin/paccache -qrk2 -c /var/cache/pacman/pkg $pkgcache

yaycache.hook

[Trigger]
Operation = Upgrade
Operation = Remove
Type = Package
Target = *

[Action]
Description = Cleaning pacman and yay cache...
When = PostTransaction
Exec = /home/herbort/.local/bin/yaycache
Depends = pacman-contrib