install_pacman_packages.sh

#!/usr/bin/env bash

# script for installing pacman packages on Steam Deck
# ATENTION: USE IT AT YOUR OWN RISK!!!!
#
# this will modify root filesystem so it will probably get
# overwrite on system updates but is totally ok executing
# it several times, so if something stops working just
# launch it again

# thanks to àngel "mussol" bosch - muzzol@gmail.com for https://gist.github.com/muzzol/f01fa6a3134d2ec90d3eb3e241bf541b, the original basis for this script

# get the path to this script
DIR=$(dirname "$0");

echo "$(date) - ${0}";

# grab the package names from the list at ./packages-to-install, but only alphanumeric, "-", "_", "+", ".",  and "@"... throw away the rest (and replace /n with " ");
PACKAGES=$(cat "${DIR}/packages-to-install" | grep -wo -E '([-A-Za-z0-9_@\.+])+' | tr '\n' ' ');

# make sure we're root...
echo -n "Checking permissions:";
if [[ "$(id -ru || true)" == "0" ]]; then
    echo "OK";
else # exit 1 if not
    echo "ERROR!";
    echo "this script must be executed by root";
    echo "Ex: sudo $0";
    exit 1;
fi

## system related comands
echo "Disabling readonly filesystem";
steamos-readonly disable;

# add a symlink so visudo will work (not that we actually need it now, since using kdesu)
if [[ ! -f "/usr/bin/vi" ]]; then
    echo "creating symlink /usr/bin/vim -> /usr/bin/vi for visudo";
    ln -s /usr/bin/vim /usr/bin/vi;
fi

# set up the keyring if it doesn't exist already
if [[ ! -e "/etc/pacman.d/gnupg/trustdb.gpg" ]]; then
    echo "Initalizing pacman keys";
    pacman-key --init;
    pacman-key --populate archlinux;
fi

echo "Installing packages";
pacman -Sy --noconfirm --overwrite '*' ${PACKAGES};

echo "Re-enabling readonly filesystem";
steamos-readonly enable;

echo "Done";