Convert Manjaro to Arch

convert.sh

#!/bin/bash
# https://www.gnu.org/licenses/old-licenses/gpl-2.0.html, who cares
#
# Tested on freshly installed Manjaro 22.0.5 Gnome.
pamac build trizen
cat >/tmp/convert.sh <<EOF
pacman -Qq | grep pamac | xargs pacman -Rs --noconfirm pamac-gtk web-installer-url-handler manjaro-hello libpamac pamac-cli libpamac-flatpak-plugin manjaro-application-utility
pacman -Rdd manjaro-release bashrc-manjaro manjaro-keyring
pacman -U https://www.archlinux.org/packages/core/x86_64/pacman/download/ https://www.archlinux.org/packages/core/any/pacman-mirrorlist/download/ https://www.archlinux.org/packages/community/any/lsb-release/download/
mv /etc/pacman.d/mirrorlist.pacnew /etc/pacman.d/mirrorlist
mv /etc/pacman.conf.pacnew /etc/pacman.conf
# following line enables multilib repository
sed -ie 's/#\(\[multilib\]\)/\1/;/\[multilib\]/,/^$/{//!s/^#//;}' /etc/pacman.conf
read -p "Uncomment mirrors from your country (press any key)"
$EDITOR /etc/pacman.d/mirrorlist
read -p "Remove manjaro-system from HoldPkg in /etc/pacman.conf"
$EDITOR /etc/pacman.conf
pacman -Qq | grep manjaro | xargs pacman -R --noconfirm
pacman -Syyu bash
pacman -S linux && pacman -Qq | grep linux[0-9] | xargs pacman -R --noconfirm; grub-mkconfig -o /boot/grub/grub.cfg
EOF
chmod +x /tmp/convert.sh
sudo /tmp/convert.sh
rm /tmp/convert.sh