main-desktop/scripts/setup.sh

#!/usr/bin/env bash
# Fresh Ubuntu 26.04 LTS -> my desktop, in one pass. Run as your user; it sudos as needed.
# Safe to re-run: each step checks before it changes anything. Reboot when it finishes,
# then run `sudo flatpak update` once so the Flatpak apps get the NVIDIA GL runtime.
set -euo pipefail

REPO="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

# Second NVMe (970 EVO Plus, label "Data"): SteamLibrary + emulator files. Never formatted.
DATA_UUID=29db4bd3-b743-417d-aa39-4da4acc9df3f
DATA_MNT=/mnt/data
# server-marvin SMB share, mounted if you give it credentials. \040 is fstab's escaped space.
MARVIN_SHARE='//192.168.1.193/Personal\040Files\040-\040ckoch'
MARVIN_MNT=/mnt/server-marvin-personal
MARVIN_CREDS=/etc/samba/credentials-marvin

step() { printf '\n\033[1;34m== %s ==\033[0m\n' "$*"; }
warn() { printf '\033[1;33mwarning:\033[0m %s\n' "$*" >&2; }
die()  { printf '\033[1;31merror:\033[0m %s\n' "$*" >&2; exit 1; }
apt_install() { sudo DEBIAN_FRONTEND=noninteractive apt-get install -y "$@"; }

[[ $EUID -ne 0 ]] || die "run as your user, not with sudo"
. /etc/os-release
[[ $ID == ubuntu ]] || die "expected Ubuntu, found $ID"
[[ $VERSION_ID == 26.04 ]] || warn "written for 26.04; this is $VERSION_ID — carrying on"
CODENAME=${UBUNTU_CODENAME:-$VERSION_CODENAME}

# Ask for the password once and keep sudo alive for the whole run (Flatpaks take a while).
sudo -v
while true; do sudo -n true; sleep 50; kill -0 "$$" 2>/dev/null || exit; done 2>/dev/null &
keepalive=$!
trap 'kill "$keepalive" 2>/dev/null' EXIT

# ---------------------------------------------------------------------------------------
step "Apt repositories"
sudo apt-get update
apt_install curl gpg ca-certificates software-properties-common
for c in universe multiverse restricted; do sudo add-apt-repository -y -n "$c"; done
sudo dpkg --add-architecture i386          # Steam + 32-bit game libraries
sudo install -d -m 0755 /etc/apt/keyrings

# Docker CE — Docker's own repo, not the snap or Ubuntu's docker.io
if [[ ! -f /etc/apt/sources.list.d/docker.sources ]]; then
  sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
  sudo chmod a+r /etc/apt/keyrings/docker.asc
  sudo tee /etc/apt/sources.list.d/docker.sources >/dev/null <<EOF
Types: deb
URIs: https://download.docker.com/linux/ubuntu
Suites: $CODENAME
Components: stable
Signed-By: /etc/apt/keyrings/docker.asc
EOF
fi

# NVIDIA Container Toolkit — GPU access inside Docker/Podman
if [[ ! -f /etc/apt/sources.list.d/nvidia-container-toolkit.list ]]; then
  curl -fsSL https://nvidia.github.io/libnvidia-container/gpgkey \
    | sudo gpg --dearmor --yes -o /usr/share/keyrings/nvidia-container-toolkit-keyring.gpg
  curl -fsSL https://nvidia.github.io/libnvidia-container/stable/deb/nvidia-container-toolkit.list \
    | sed 's#deb https://#deb [signed-by=/usr/share/keyrings/nvidia-container-toolkit-keyring.gpg] https://#g' \
    | sudo tee /etc/apt/sources.list.d/nvidia-container-toolkit.list >/dev/null
fi

# VS Code — Microsoft's repo (was rpm-ostree-layered on Bazzite)
if [[ ! -f /etc/apt/sources.list.d/vscode.sources ]]; then
  curl -fsSL https://packages.microsoft.com/keys/microsoft.asc \
    | sudo gpg --dearmor --yes -o /usr/share/keyrings/microsoft.gpg
  sudo tee /etc/apt/sources.list.d/vscode.sources >/dev/null <<EOF
Types: deb
URIs: https://packages.microsoft.com/repos/code
Suites: stable
Components: main
Architectures: amd64
Signed-By: /usr/share/keyrings/microsoft.gpg
EOF
fi

# GitHub CLI
if [[ ! -f /etc/apt/sources.list.d/github-cli.list ]]; then
  sudo curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg \
    -o /etc/apt/keyrings/githubcli-archive-keyring.gpg
  sudo chmod go+r /etc/apt/keyrings/githubcli-archive-keyring.gpg
  echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" \
    | sudo tee /etc/apt/sources.list.d/github-cli.list >/dev/null
fi

# Claude desktop — Anthropic's repo (ran inside an Ubuntu distrobox on Bazzite)
if [[ ! -f /etc/apt/sources.list.d/claude-desktop.list ]]; then
  key=/usr/share/keyrings/claude-desktop-archive-keyring.asc
  sudo curl -fsSLo "$key" https://downloads.claude.ai/claude-desktop/key.asc
  if ! gpg --show-keys --with-colons "$key" 2>/dev/null \
      | grep -q '^fpr:::::::::31DDDE24DDFAB679F42D7BD2BAA929FF1A7ECACE:'; then
    sudo rm -f "$key"; die "Claude desktop signing key has the wrong fingerprint — not adding the repo"
  fi
  echo "deb [arch=amd64,arm64 signed-by=$key] https://downloads.claude.ai/claude-desktop/apt/stable stable main" \
    | sudo tee /etc/apt/sources.list.d/claude-desktop.list >/dev/null
fi

sudo apt-get update
sudo DEBIAN_FRONTEND=noninteractive apt-get full-upgrade -y

# ---------------------------------------------------------------------------------------
step "Packages"
# steam-installer refuses to install non-interactively until its license is accepted.
echo 'steam-installer steam/question select I AGREE' | sudo debconf-set-selections
echo 'steam-installer steam/license note '           | sudo debconf-set-selections

apt_install \
  build-essential cmake pkg-config git git-lfs wget jq zstd unzip p7zip-full rsync htop \
  python3-venv python3-pip pipx ffmpeg cifs-utils flatpak \
  steam-installer steam-devices gamemode mangohud lutris vulkan-tools \
  docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin \
  nvidia-container-toolkit \
  code claude-desktop

# ---------------------------------------------------------------------------------------
step "NVIDIA driver (open kernel modules — the only kind the RTX 5090 supports)"
apt_install ubuntu-drivers-common
installed_driver() {
  { dpkg-query -W -f='${Status} ${Package}\n' 'nvidia-driver-*' 2>/dev/null || true; } \
    | awk '/^install ok installed / {print $4}' | sort -V | tail -1
}
if [[ $(installed_driver) != *-open ]]; then
  ubuntu-drivers devices 2>/dev/null | grep -E 'model|driver' || true
  # Picks Ubuntu's recommended branch plus its prebuilt, signed kernel modules (no DKMS).
  sudo ubuntu-drivers install
fi
driver=$(installed_driver)
[[ $driver == nvidia-driver-*-open ]] \
  || die "got '${driver:-no driver}', but the 5090 needs an -open driver — check 'ubuntu-drivers devices'"
branch=${driver#nvidia-driver-}; branch=${branch%-open}
apt_install "libnvidia-gl-$branch:i386"     # 32-bit GL/Vulkan for Steam and Proton
echo "using $driver"

# ---------------------------------------------------------------------------------------
step "Docker, GPU containers, Claude's Cowork VM"
sudo usermod -aG docker "$USER"            # docker without sudo (after reboot)
getent group kvm >/dev/null && sudo usermod -aG kvm "$USER"   # Cowork needs /dev/kvm + vhost-vsock
echo vhost_vsock | sudo tee /etc/modules-load.d/vhost_vsock.conf >/dev/null
if ! grep -q nvidia /etc/docker/daemon.json 2>/dev/null; then
  sudo nvidia-ctk runtime configure --runtime=docker   # enables `docker run --gpus all`
  sudo systemctl restart docker
fi

# ---------------------------------------------------------------------------------------
step "Flatpak apps"
sudo flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
mapfile -t apps < <(sed -e 's/#.*//' -e 's/[[:space:]]//g' -e '/^$/d' "$REPO/flatpaks.txt")
sudo flatpak install -y --noninteractive --system flathub "${apps[@]}"
# Firefox's read-only peek at landingPage, as set by hand on Bazzite
flatpak override --user org.mozilla.firefox --filesystem="$HOME/Documents/git/landingPage:ro"

# Firefox/Thunderbird come from Flathub instead, so restoring ~/.var/app brings the old
# profiles back untouched. Drop Ubuntu's snaps and the debs that pull them back in.
for s in firefox thunderbird; do
  if snap list "$s" >/dev/null 2>&1; then sudo snap remove --purge "$s"; fi
  if dpkg -s "$s" >/dev/null 2>&1; then sudo apt-get remove -y "$s"; fi
done
xdg-settings set default-web-browser org.mozilla.firefox.desktop 2>/dev/null || true

# Keep Flatpaks updated daily, like Bazzite did. Starts next boot.
sudo tee /etc/systemd/system/flatpak-update.service >/dev/null <<'EOF'
[Unit]
Description=Update system Flatpaks
Wants=network-online.target
After=network-online.target

[Service]
Type=oneshot
ExecStart=/usr/bin/flatpak update --system --noninteractive --assumeyes
EOF
sudo tee /etc/systemd/system/flatpak-update.timer >/dev/null <<'EOF'
[Unit]
Description=Update system Flatpaks daily

[Timer]
OnBootSec=10min
OnUnitActiveSec=1d
Persistent=true

[Install]
WantedBy=timers.target
EOF
sudo systemctl daemon-reload
sudo systemctl enable flatpak-update.timer

# ---------------------------------------------------------------------------------------
step "Git credentials in the keyring"
# On Bazzite, KDE Wallet fed git your Gitea password through ksshaskpass. GNOME's keyring does
# the same job via git's libsecret helper, which Ubuntu ships as source only — so build it.
if ! git config --global --get credential.helper >/dev/null 2>&1; then
  helper="" src=/usr/share/doc/git/contrib/credential/libsecret
  if [[ -e $src/git-credential-libsecret.c || -e $src/git-credential-libsecret.c.gz ]]; then
    apt_install libsecret-1-dev libglib2.0-dev
    tmp=$(mktemp -d)
    if [[ -e $src/git-credential-libsecret.c.gz ]]; then
      zcat "$src/git-credential-libsecret.c.gz" > "$tmp/h.c"
    else
      cp "$src/git-credential-libsecret.c" "$tmp/h.c"
    fi
    read -ra cf < <(pkg-config --cflags libsecret-1 glib-2.0)
    read -ra lf < <(pkg-config --libs libsecret-1 glib-2.0)
    if cc -O2 "${cf[@]}" "$tmp/h.c" -o "$tmp/git-credential-libsecret" "${lf[@]}" 2>/dev/null; then
      sudo install -m 755 "$tmp/git-credential-libsecret" /usr/local/bin/
      helper=/usr/local/bin/git-credential-libsecret
    fi
    rm -rf "$tmp"
  fi
  if [[ -n $helper ]]; then
    git config --global credential.helper "$helper"
  else
    git config --global credential.helper 'cache --timeout=604800'
    warn "no keyring helper — git will hold your Gitea password for a week at a time instead"
  fi
fi

step "Claude Code CLI"
# No Node or .NET on the host by choice — LudosData and landingPage build in Docker.
# If you want them back: sudo apt install mise dotnet-sdk-10.0 (mise needs ppa:jdxcode/mise).
command -v claude >/dev/null || [[ -x ~/.local/bin/claude ]] || curl -fsSL https://claude.ai/install.sh | bash

# ---------------------------------------------------------------------------------------
step "Data drive + server-marvin share"
sudo mkdir -p "$DATA_MNT" "$MARVIN_MNT"
if ! grep -q "$DATA_UUID" /etc/fstab; then
  echo "UUID=$DATA_UUID  $DATA_MNT  ext4  defaults,nofail,x-gvfs-show,x-gvfs-name=Data  0  2" \
    | sudo tee -a /etc/fstab >/dev/null
fi
sudo blkid -U "$DATA_UUID" >/dev/null || warn "Data drive ($DATA_UUID) not found — fstab entry is nofail, so boot is fine"

if [[ ! -f $MARVIN_CREDS ]]; then
  echo "server-marvin SMB share — press Enter to skip mounting it."
  read -rp  "  username: " smb_user
  if [[ -n $smb_user ]]; then
    read -rsp "  password: " smb_pass; echo
    sudo install -d -m 0755 /etc/samba
    printf 'username=%s\npassword=%s\n' "$smb_user" "$smb_pass" \
      | sudo install -m 600 /dev/stdin "$MARVIN_CREDS"
    unset smb_pass
  fi
fi
if [[ -f $MARVIN_CREDS ]] && ! grep -q "$MARVIN_MNT" /etc/fstab; then
  echo "$MARVIN_SHARE  $MARVIN_MNT  cifs  credentials=$MARVIN_CREDS,uid=$(id -u),gid=$(id -g),iocharset=utf8,vers=3.0,x-systemd.automount,_netdev,nofail  0  0" \
    | sudo tee -a /etc/fstab >/dev/null
fi
sudo systemctl daemon-reload
sudo mount -a || warn "a mount failed — check 'sudo mount -a' (is server-marvin up? right password?)"

# ---------------------------------------------------------------------------------------
step "Small carry-overs from Bazzite"
# Xbox controllers over Bluetooth (Bazzite set this as a kernel argument)
echo 'options bluetooth disable_ertm=1' | sudo tee /etc/modprobe.d/bluetooth-xbox.conf >/dev/null

step "Done"
cat <<'EOF'
Reboot now — the NVIDIA driver and your docker/kvm groups only take effect after that.

Then, once:
  sudo flatpak update        # pulls the NVIDIA GL runtime the Flatpak apps need.
                             # Skip it and apps render in software until the daily
                             # timer catches up ~10 minutes after boot.

Then sign in to things, and add /mnt/data/SteamLibrary in Steam > Settings > Storage.
EOF