Remove CPDB backend info file (#26)

The frontend libraries now use only the D-Bus to find available backends. This makes sure that everything works also if the frontend and/or any of the backends are installed via sanboxed packaging (like Snap for example) where the components cannot read each other's file systems.

configure.ac

@@ -35,13 +35,6 @@ PKG_CHECK_VAR([DBUS_SERVICES_DIR], [dbus-1], [session_bus_services_dir],
   AC_MSG_FAILURE([cannot locate session_bus_services_dir])
 )
 
-# The info directory which will be read by the frontend
-AC_MSG_CHECKING([CPDB backend info path])
-PKG_CHECK_VAR([INFO_DIR], [cpdb], [cpdb_backend_info_dir],
-  AC_MSG_RESULT($INFO_DIR),
-  AC_MSG_FAILURE([cannot locate cpdb_backend_info_dir])
-)
-
 # The directory for the backend executables
 AC_MSG_CHECKING([CPDB backend executables path])
 PKG_CHECK_VAR([CPDB_BACKEND_DIR], [cpdb], [cpdb_backend_exec_dir],

data/Makefile.am

@@ -1,6 +1,5 @@
 EXTRA_DIST = \
 	org.cups.cupsd.Notifier.xml \
-	org.openprinting.Backend.CUPS \
 	org.openprinting.Backend.CUPS.service.in
 
 # Dbus service file
@@ -11,8 +10,5 @@ service_DATA = $(service_in_files:.service.in=.service)
 $(service_DATA): $(service_in_files) Makefile
 	@sed -e "s|\@cpdb_backend_dir\@|$(CPDB_BACKEND_DIR)|" $<> $@
 
-info_backenddir = $(INFO_DIR)
-info_backend_DATA = org.openprinting.Backend.CUPS
-
 clean-local:
 	rm -rf $(service_DATA)

src/print_backend_cups.c

@@ -12,7 +12,6 @@
 
 #define _CUPS_NO_DEPRECATED 1
 #define BUS_NAME "org.openprinting.Backend.CUPS"
-#define OBJECT_PATH "/"
 
 static void
 on_name_acquired(GDBusConnection *connection,
@@ -164,7 +163,7 @@ on_name_acquired(GDBusConnection *connection,
     b->dbus_connection = connection;
     b->skeleton = print_backend_skeleton_new();
     connect_to_signals();
-    connect_to_dbus(b, OBJECT_PATH);
+    connect_to_dbus(b, CPDB_BACKEND_OBJ_PATH);
 }
 
 static gboolean on_handle_get_printer_list(PrintBackend *interface,