Make openbox-gnome-session compatible with gnome3 with gnome-session 3.0+ support.

Yay they did something nice and made it easier for other window managers to be used.  How unexpected and pleasant.

Makefile.am

@@ -6,6 +6,7 @@ localedir       = $(datadir)/locale
 configdir       = $(sysconfdir)/xdg
 rcdir           = $(configdir)/openbox
 xsessionsdir    = $(datadir)/xsessions
+gnomesessiondir = $(datadir)/gnome-session/sessions
 gnomewmfilesdir = $(datadir)/gnome/wm-properties
 pkgconfigdir    = $(libdir)/pkgconfig
 obtpubincludedir= $(includedir)/openbox/@OBT_VERSION@/obt
@@ -513,6 +514,9 @@ nodist_xsessions_DATA = \
 	data/xsession/openbox-gnome.desktop \
 	data/xsession/openbox-kde.desktop
 
+dist_gnomesession_DATA = \
+	data/xsession/openbox-gnome.session
+
 dist_noinst_DATA = \
 	data/rc.xsd \
 	data/menu.xsd \
@@ -581,6 +585,7 @@ EXTRA_DIST = \
 CLEANFILES = \
 	$(nodist_man_MANS) \
 	$(nodist_bin_SCRIPTS) \
+	$(dist_gnomesession_DATA) \
 	$(nodist_xsessions_DATA) \
 	$(nodist_rc_SCRIPTS) \
 	$(nodist_libexec_SCRIPTS)

data/xsession/openbox-gnome-session.in

@@ -21,11 +21,11 @@ MINOR=$(echo $VER | cut -d . -f 2)
 # run GNOME with Openbox as its window manager
 
 if test $MAJOR -lt 2 || (test $MAJOR = 2 && test $MINOR -le 22); then
-  # old gnome-session was easy to work with
+  # older gnome-session was easy to work with
   export WINDOW_MANAGER="@bindir@/openbox"
   exec gnome-session --choose-session=openbox-session "$@"
-else
-  # new gnome-session requires openbox to be set in gconf and an
+elif test $MAJOR -lt 3; then
+  # old gnome-session requires openbox to be set in gconf and an
   # openbox.desktop to be installed in the applications directory
 
   SPATH=/desktop/gnome/session
@@ -54,6 +54,12 @@ else
 
   # run GNOME/Openbox
   exec gnome-session --default-session-key $SPATH/openbox_session "$@"
+else
+  # new gnome-session requires session file installed in
+  # /usr/share/gnome-session/sessions as well as openbox.desktop to be
+  # installed in the applications directory
+
+  exec gnome-session --session=openbox-gnome
 fi
 
 

data/xsession/openbox-gnome.session

@@ -0,0 +1,6 @@
+[GNOME Session]
+Name=GNOME/Openbox
+RequiredComponents=gnome-panel;gnome-settings-daemon;
+RequiredProviders=windowmanager;notifications;
+DefaultProvider-windowmanager=openbox
+DefaultProvider-notifications=notification-daemon