convert ubuntu-aarch64 to pop-os (for Parallels on Apple Silicon Macs)

ubuntu-to-popos-arm64-coversion

#!/bin/bash

## this script is intended to allow pop os to run on arm64 machines that isn't a raspberry pi
## very useful especially on a parallels virtual machine on the M1 or M2 macs

### plz note I got commands from a random reddit link leading to a website
### which I really need to credit but can't find the source

# to get the script started you must start up an ubuntu live cd ad perform the installation
# see link to download the desktop live environment for easy install
# https://cdimage.ubuntu.com/jammy/daily-live/current/jammy-desktop-arm64.iso

## plz DO NOT RESTART after the ubuntu installation
## you must chroot to /target (make sure it's mounted)
mount | grep -e '\s/target\s' &> /dev/null && 
    mount --bind /target /target && 
    cd /target && 
    rm /target/etc/resolv.conf && 
    cp /etc/resolv.conf etc && 
    mount -t proc /proc proc && 
    mount --make-rslave --rbind /sys sys && 
    mount --make-rslave --rbind /dev dev && 
    mount --make-rslave --rbind /run run

[ "$?" == "0" ] && cp "$0" "/target/tmp/"

if mount | grep -e \\s"/cdrom"\\s &> /dev/null; then
    # to prevent Pop!_OS being installed to the live environment
    printf "%s\n" "error: please chroot into '/target' before performming the script"
    exit 1
fi


# this is for when they are not in the live environment running directly on the ubuntu installation
if pgrep gnome-shell &> /dev/null || pgrep gdm &> /dev/null  && ! ischroot; then
    printf "%s\n" "error: this script cannot run when gdm or gnome is running"
    printf "%s\n" "       log out then press ctrl-alt-(fn)f3 and type in"
    printf "%s\n" "       'sudo systemctl stop gdm'"
    printf "%s\n" "       then try again"
    exit 1
fi    

# the conversion 
sudo apt purge --autoremove -y ubuntu-desktop
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 63C46DF0140D738961429F4E204DD8AEC33A7AFF
sudo add-apt-repository "deb http://apt.pop-os.org/release $(lsb_release -cs) main" -y
sudo add-apt-repository "deb http://apt.pop-os.org/staging/master $(lsb_release -cs) main" -y
sudo apt update -y && sudo apt full-upgrade -y
sudo apt install -y pop-desktop-raspi

# error occurs so we must fix on apt
sudo dpkg -i --force-overwrite /var/cache/apt/archives/pop-gnome-initial-setup_*_arm64.deb 
sudo apt -f -y install
sudo apt install -y pop-desktop-raspi

sudo sed -i 's/Enabled: yes/Enabled: no/g' /etc/apt/sources.list.d/system.sources /etc/apt/sources.list.d/pop-os-apps.sources

sudo apt purge --autoremove -y linux*-raspi*
sudo apt update -y && sudo apt full-upgrade --allow-downgrades -y