hobos: gently skip uptodate sites (#5939)

wcs/ctl/check_hobos.py

@@ -26,6 +26,10 @@ from qommon.ctl import Command
 from qommon.storage import atomic_write
 
 
+class NoChange(Exception):
+    pass
+
+
 class CmdCheckHobos(Command):
     name = 'check-hobos'
 
@@ -63,7 +67,12 @@ class CmdCheckHobos(Command):
                 pub.set_config()
                 new_site = False
 
-            self.configure_site_options(service, pub)
+            try:
+                self.configure_site_options(service, pub)
+            except NoChange:
+                print '  skipping'
+                continue
+
             self.update_configuration(service, pub)
             self.configure_authentication_methods(service, pub)
             if new_site:
@@ -141,6 +150,12 @@ class CmdCheckHobos(Command):
         if os.path.exists(site_options_filepath):
             config.read(site_options_filepath)
 
+        try:
+            if config.getint('hobo', 'timestamp') == self.all_services.get('timestamp'):
+                raise NoChange()
+        except (ConfigParser.NoOptionError, ConfigParser.NoSectionError):
+            pass
+
         if not 'hobo' in config.sections():
             config.add_section('hobo')
         config.set('hobo', 'timestamp', self.all_services.get('timestamp'))