plasmalogin

os-session-select

#!/usr/bin/bash

set -e

die() { echo >&2 "!! $*"; exit 1; }

export DESKTOP_WAYLAND=true

SENTINEL_FILE="steamos-session-select"


session="${1:-gamescope}"
if ${DESKTOP_WAYLAND}; then
  session_type="wayland"
else
  session_type="x11"
fi

session_launcher=""
create_sentinel=""

if [[ "$2" == "--sentinel-created" ]]; then
  SENTINEL_CREATED=1
  if ${DESKTOP_WAYLAND}; then
      session_type="wayland"
  else
      session_type="x11"
  fi
fi

# Update config sentinel
if [[ -z $SENTINEL_CREATED ]]; then
  [[ $EUID == 0 ]] && die "Running $0 as root is not allowed"

  [[ -n ${HOME+x} ]] || die "No \$HOME variable"
  config_dir="${XDG_CONF_DIR:-"$HOME/.config"}"
  session_type=$(
    cd "$HOME"
    mkdir -p "$config_dir"
    cd "$config_dir"
    if [[ -f "steamos-session-type" ]]; then
      cp steamos-session-type "$SENTINEL_FILE"
    else
      if ${DESKTOP_WAYLAND}; then
        echo "wayland" > "$SENTINEL_FILE"
      else
        echo "x11" > "$SENTINEL_FILE"
      fi
    fi
    cat "$SENTINEL_FILE"
  )

  # clear steam game desktop shortcut clutter
  DATA_HOME=${XDG_DATA_HOME:-$HOME/.local/share}
  grep -r --files-with-matches "Exec=steam steam://rungameid/" "${DATA_HOME}"/applications/ | tr '\n' '\0' | xargs -0 -I {} rm {} || true

  # If we were executed as a session user and then re-execute as root below, we don't want to set root's sentinel too
  export SENTINEL_CREATED=1
fi

# We use "plasma" as "desktop" to hook up to SteamOS's scripts
case "$session" in
  plasma-wayland-persistent)
    if [[ ! -z $(systemctl status gdm | grep running) ]]; then
      session_launcher="gnome-wayland"
    elif [[ ! -z $(systemctl status sddm | grep running) ]]; then
      session_launcher="plasma"
    fi
  ;;
  plasma-x11-persistent)
    if [[ ! -z $(systemctl status gdm | grep running) ]]; then
      session_launcher="gnome-xorg"
    elif [[ ! -z $(systemctl status sddm | grep running) ]]; then
      session_launcher="plasmax11"
    fi
  ;;
  desktop|plasma)
    if ${DESKTOP_WAYLAND}; then
      if [[ ! -z $(systemctl status gdm | grep running) ]]; then
        session_launcher="gnome-wayland"
      elif [[ ! -z $(systemctl status sddm | grep running) ]]; then
        session_launcher="plasma"
      fi
    else
      if [[ ! -z $(systemctl status gdm | grep running) ]]; then
        session_launcher="gnome-xorg"
      elif [[ ! -z $(systemctl status sddm | grep running) ]]; then
        session_launcher="plasmax11"
      fi
    fi
    create_sentinel=1
  ;;
  gamescope)
    session_launcher="gamescope-session-steam"
    create_sentinel=1
  ;;
  plasmalogin)
    if ${DESKTOP_WAYLAND}; then
      session_launcher="plasma"
    else
      session_launcher="plasmax11"
    fi
    create_sentinel=1
  ;;
  *)
    echo >&2 "!! Unrecognized session '$session'"
    exit 1
  ;;
esac

echo "Updated user selected session to $session_launcher"

if [[ ! -z $4 ]]; then
  GDMUSER="$4"
fi

# Become root
if [[ $EUID != 0 ]]; then
  exec pkexec "$(realpath $0)" "$session" --sentinel-created "$session_type" "$USER"
  exit 1
fi

# Find the home directory of the specified user
USER_HOME=$(getent passwd "$GDMUSER" | cut -d: -f6)

# Check if /etc/nobara/decky_loader/autoupdate.conf exists
if [ ! -f /etc/nobara/decky_loader/autoupdate.conf ]; then
  if [ -f /etc/systemd/system/plugin_loader.service ]; then
    # File does not exist, proceed with stopping Decky Loader
    systemctl stop plugin_loader.service
    # Make sure no lingering Deckyloader processes
    ps aux | grep "$USER_HOME/homebrew/plugins/" | grep -v grep | awk '{print $2}' | xargs -r kill -9
  fi
else
    # File exists, check its contents
    if ! grep -q 'disabled' /etc/nobara/decky_loader/autoupdate.conf; then
      if [ -f /etc/systemd/system/plugin_loader.service ]; then

        # Proceed with stopping Decky Loader
        systemctl stop plugin_loader.service
        # Make sure no lingering Deckyloader processes
        ps aux | grep "$USER_HOME/homebrew/plugins/" | grep -v grep | awk '{print $2}' | xargs -r kill -9
      fi
    fi
fi


# GNOME/GDM
if [[ ! -z $(systemctl status gdm | grep running) ]]; then
  # set new default session
  if ${DESKTOP_WAYLAND}; then
    if [[ -f /var/lib/AccountsService/users/"$GDMUSER" ]]; then
      sed -i "s|Session=.*|Session=$session_launcher|g" /var/lib/AccountsService/users/"$GDMUSER"
    else
      echo "[User]" > /var/lib/AccountsService/users/"$GDMUSER"
      echo "Session=$session_launcher" >> /var/lib/AccountsService/users/"$GDMUSER"
    fi
  else
    if [[ -f /var/lib/AccountsService/users/"$GDMUSER" ]]; then
      sed -i "s|XSession=.*|XSession=$session_launcher|g" /var/lib/AccountsService/users/"$GDMUSER"
    else
      echo "[User]" > /var/lib/AccountsService/users/"$GDMUSER"
      echo "XSession=$session_launcher" >> /var/lib/AccountsService/users/"$GDMUSER"
    fi
  fi
  # enable auto-login
  # We need timedlogin here
  # autologin without timer fails after manual logout
  if [[ -f /etc/gdm/custom.conf ]]; then
    sed -i "s|TimedLoginEnable=.*|TimedLoginEnable=true|g" /etc/gdm/custom.conf
    sed -i "s|TimedLoginDelay=.*|TimedLoginDelay=1|g" /etc/gdm/custom.conf
    sed -i "s|TimedLogin=.*|TimedLogin=$GDMUSER|g" /etc/gdm/custom.conf
    if [[ -z $(cat /etc/gdm/custom.conf | grep TimedLogin) ]]; then
      sed -i "/\[daemon\]/a\TimedLoginEnable=true" /etc/gdm/custom.conf
      sed -i "/TimedLoginEnable=true/a\TimedLoginDelay=1" /etc/gdm/custom.conf
      sed -i "/TimedLoginDelay=1/a\TimedLogin=$GDMUSER" /etc/gdm/custom.conf
    fi
  fi
fi


# KDE/SDDM
if [[ ! -z $(systemctl status sddm | grep running) ]]; then
  if [[ -f /etc/sddm.conf ]]; then
    # set new default session
    sed -i "s|Session=.*|Session=$session_launcher.desktop|g" /etc/sddm.conf
    # Relogin is REQUIRED for SDDM to not just boot us to the login screen without relogging
    # GDM has similar problem needing timedlogin instead of autologin
    sed -i "s|Relogin=.*|Relogin=true|g" /etc/sddm.conf
    if [[ -z $(cat /etc/sddm.conf | grep Relogin) ]]; then
      sed -i '/\[Autologin\]/a\Relogin=true' /etc/sddm.conf
    fi
  fi
  # check second location just in case
  if [[ -f /etc/sddm.conf.d/kde_settings.conf ]]; then
    # set new default session
    sed -i "s|Session=.*|Session=$session_launcher.desktop|g" /etc/sddm.conf.d/kde_settings.conf
    # Relogin is REQUIRED for SDDM to not just boot us to the login screen without relogging
    # GDM has similar problem needing timedlogin instead of autologin
    sed -i "s|Relogin=.*|Relogin=true|g" /etc/sddm.conf.d/kde_settings.conf
    if [[ -z $(cat /etc/sddm.conf.d/kde_settings.conf | grep Relogin) ]]; then
      sed -i '/\[Autologin\]/a\Relogin=true' /etc/sddm.conf.d/kde_settings.conf
    fi
  fi
fi

# LightDM (For Chimera)
if [[ ! -z $(systemctl status lightdm | grep running) ]]; then
  sed -i "s|autologin-session=.*|autologin-session=$session_launcher.desktop|g" /etc/lightdm/lightdm.conf.d/10-chimeraos-session.conf
fi