add per-service default set of variables (#5841)

hobo/default_settings.py

@@ -120,6 +120,15 @@ SERVICE_URL_TEMPLATE = 'https://${app}.example.net'
 #    }
 SERVICE_TEMPLATES = None
 
+# SERVICE_EXTRA_VARIABLES: variables to create automatically for the
+# given service types.
+#
+# Example:
+#    SERVICE_EXTRA_VARIABLES = {
+#        'wcs': ['legal_url', 'commune_url', 'domain_key'],
+#    }
+SERVICE_EXTRA_VARIABLES = None
+
 AGENT_HOST_PATTERNS = None
 AGENT_WCS_APP_DIR = '/var/lib/wcs'
 AGENT_WCS_COMMAND = '/usr/sbin/wcsctl check-hobos'

hobo/environment/models.py

@@ -88,6 +88,16 @@ class ServiceBase(models.Model):
     def name(self):
         return self.title
 
+    def save(self, *args, **kwargs):
+        is_new = (self.id is None)
+        super(ServiceBase, self).save(*args, **kwargs)
+        if is_new and settings.SERVICE_EXTRA_VARIABLES:
+            for variable in settings.SERVICE_EXTRA_VARIABLES.get(self.Extra.service_id, []):
+                v = Variable()
+                v.name = variable
+                v.service = self
+                v.save()
+
 
 class Authentic(ServiceBase):
     class Meta: