#!/bin/sh
#
# A wrapper script to decide how to invoke gnome-session
GNOME_SESSION_VER=`dpkg-query --showformat='${Version}' --show gnome-session`

SESSION="gnome-session"
ARGS=""

# STDERR will go somewhere useful at this point, right?
echo "**** Athena session wrapper (/usr/bin/athena-session)" >&2
echo "**** session started at $(date)" >&2

# Support for --session was added in gnome-session 2.32.1-0ubuntu2
# according to the changelog
if dpkg --compare-versions "$GNOME_SESSION_VER" ge '2.32.1-0ubuntu2~'; then
  if [ -e /usr/share/gnome-session/sessions/classic-gnome.session ]; then
    ARGS="--session=classic-gnome"
  elif [ -e /usr/share/gnome-session/sessions/ubuntu-2d.session ]; then
    ARGS="--session=ubuntu-2d"
  elif [ -e /usr/share/gnome-session/sessions/ubuntu.session ]; then
    ARGS="--session=ubuntu"
  else
    zenity --error --text="Can't find a valid GNOME session to run (shouldn't happen).  Please report this error to bugs@mit.edu and mention the hostname ($(hostname -f)) in your report."
    exit 1
  fi
fi

echo "**** About to run $SESSION $ARGS $@" >&2
exec "$SESSION" "$ARGS" "$@"