shell script to prepare steamdeck for development

prep

#!/bin/sh
# use this to prep remote development
#
# ensures sshd is active and multiuser nix is installed
#
# the most common activity here is mounting the local vault
# other activities happen only on installation or after upgrades
#
# activate ssh if it's not activated
if ! systemctl is-active sshd > /dev/null 2>&1; then
    echo Activating sshd...
    sudo systemctl activate sshd
    sudo systemctl start sshd
fi
# prep nix if it's not there
if ! [ -d /nix ]; then
    echo Installing Nix...
    sudo steamos-readonly disable
    sudo mkdir /nix
    sudo steamos-readonly enable
    if ! [ -d /home/nix ]; then
        mkdir /home/nix
    fi
    if ! grep -q /nix /etc/fstab; then
        sudo sh -c 'echo "/home/nix                         /nix    none    defaults,bind 0 2" >> /etc/fstab'
    fi
    sudo mount /nix
    sh <(curl -L https://nixos.org/nix/install) --daemon
fi
# check separately for /etc/systemd/system/nix-daemon.* because upgrades might delete it
if ! [ -f /etc/systemd/system/nix-daemon.service ] || [ "$(realpath /etc/systemd/system/nix-daemon.service)" = /nix/var/nix/profiles/default/lib/systemd/system/nix-daemon.service ]; then
    # copy systemd files so they are present at systemd startup
    echo Copying systemd files...
    sudo rm -f /etc/systemd/system/nix-daemon.service /etc/systemd/system/nix-daemon.socket
    sudo cp /home/nix/var/nix/profiles/default/lib/systemd/system/nix-daemon.service /etc/systemd/system
    sudo cp /home/nix/var/nix/profiles/default/lib/systemd/system/nix-daemon.socket /etc/systemd/system
    sudo systemctl enable nix-daemon
    sudo systemctl start nix-daemon
fi
# mount local vault if it's not mounted
! [ -d ~/Vaults/local ] && umount ~/Vaults/local
if ! mount | grep -q /home/deck/Vaults/local; then
    echo Mounting vault...
    gocryptfs /home/deck/.local/share/plasma-vault/local.enc /home/deck/Vaults/local
fi