if [ "$DESKTOP_SESSION" != "gnome" ]; then
if [ -z "$XDG_DATA_DIRS" ]; then XDG_DATA_DIRS="$DEFAULT_XDG_DATA_DIRS"
fi
if [ -n "${XDG_DATA_DIRS##*/usr/share/$DESKTOP_SESSION*}" ]; then XDG_DATA_DIRS=/usr/share/"$DESKTOP_SESSION":"$XDG_DATA_DIRS"
fi
export XDG_DATA_DIRS
fi
It seems to come from
/etc/X11/ Xsession. d/60x11- common_ xdg_path
which sets
DEFAULT_ XDG_DATA_ DIRS='/ usr/local/ share/: /usr/share/ '
...
if [ "$DESKTOP_SESSION" != "gnome" ]; then
XDG_DATA_ DIRS="$ DEFAULT_ XDG_DATA_ DIRS" DATA_DIRS# #*/usr/ share/$ DESKTOP_ SESSION* }" ]; then
XDG_DATA_ DIRS=/usr/ share/" $DESKTOP_ SESSION" :"$XDG_ DATA_DIRS"
if [ -z "$XDG_DATA_DIRS" ]; then
fi
if [ -n "${XDG_
fi
export XDG_DATA_DIRS
fi
where $DESKTOP_SESSION has the value Lubuntu