SteamDeck_rEFInd_install.sh

#!/bin/bash
# A simple Steam Deck rEFInd automated install script

passwd --status deck | tee ~/deck_passwd_status.txt
awk '{
	if($2 =="P")
    {
		print "Password is already set.";
	}
    else
    {
		print "Password has not been set. Please set password for deck user now.";
		system("passwd");
	}
}' ~/deck_passwd_status.txt

sudo steamos-readonly disable
sudo pacman-key --init
sudo pacman-key --populate archlinux
sudo pacman -Sy --noconfirm --needed refind
sudo refind-install

efibootmgr | tee ~/efibootlist.txt
WINDOWS_BOOTNUM="$(grep -A0 'Windows' ~/efibootlist.txt | grep -Eo '[0-9]{1,4}' | head -1)"
# Disable Windows EFI boot entry
sudo efibootmgr -b $WINDOWS_BOOTNUM -A
REFIND_BOOTNUM="$(grep -A0 'rEFInd Boot Manager' ~/efibootlist.txt | grep -Eo '[0-9]{1,4}' | head -1)"
# Delete rEFInd EFI boot entry from rEFInd-install... will be re-added later pointing to esp partition
sudo efibootmgr -b $REFIND_BOOTNUM -B
# Checking for duplicate rEFInd EFI boot entry, from previous script runs (or other sources)
REFIND_BOOTNUM_ALT="$(grep -A0 'rEFInd' ~/efibootlist.txt | grep -Eo '[0-9]{1,4}' | head -1)"
STEAMOS_BOOTNUM="$(grep -A0 'SteamOS' ~/efibootlist.txt | grep -Eo '[0-9]{1,4}' | head -1)"

# Deleting duplicate rEFInd boot entry, if one was found
re='^[0-9]+$'
if [[ $REFIND_BOOTNUM_ALT =~ $re ]]; then
	sudo efibootmgr -b $REFIND_BOOTNUM_ALT -B
fi

if ! [[ $STEAMOS_BOOTNUM =~ $re ]]; then
	# Recreate the missing SteamOS EFI entry
	sudo efibootmgr -c -d /dev/nvme0n1 -p 1 -L "SteamOS" -l \\EFI\\steamos\\steamcl.efi
fi

yes | sudo cp -rf /boot/efi/EFI/refind/ /esp/efi
# Renaming default rEFInd config file to keep for reference and backup
sudo mv /esp/efi/refind/refind.conf /esp/efi/refind/refind-bkp.conf
CURRENT_WD=$(pwd)
yes | sudo cp $CURRENT_WD/refind-GUI.conf /esp/efi/refind/refind.conf
yes | sudo cp -rf $CURRENT_WD/backgrounds/ /esp/efi/refind
yes | sudo cp -rf $CURRENT_WD/icons/ /esp/efi/refind
# Creating rEFInd EFI entry
sudo efibootmgr -c -d /dev/nvme0n1 -p 1 -L "rEFInd" -l \\EFI\\refind\\refind_x64.efi

# Granting executable permissions to EFI entry restore script
chmod +x $CURRENT_WD/scripts/restore_EFI_entries.sh
mkdir -p $HOME/.local/SteamDeck_rEFInd/GUI
cp $CURRENT_WD/scripts/restore_EFI_entries.sh $HOME/.local/SteamDeck_rEFInd/

# Adding Systemctl daemon for rEFInd to be next boot priority
# Credit goes to Reddit user lucidludic for the idea :)
yes | sudo cp $CURRENT_WD/systemd/bootnext-refind.service /etc/systemd/system/bootnext-refind.service
sudo systemctl daemon-reload
sudo systemctl enable --now bootnext-refind.service

# Clean up temporary files, created for code clarity
yes | rm $HOME/deck_passwd_status.txt
yes | rm $HOME/efibootlist.txt

sudo steamos-readonly enable

echo -e "\nrEFInd has now been installed (assuming pacman is functional).\n"