santad: add prefixes on a background thread (#444)

* add prefixes on a background thread

* version bump

Source/santad/EventProviders/SNTDriverManager.m

@@ -336,6 +336,8 @@ static void driverAppearedHandler(void *info, io_iterator_t iterator) {
         LOGE(@"Prefix filter tree is full!");
         return;
       }
+    } else {
+      LOGI(@"Added prefix filter: %s", buffer);
     }
   }
 }

Source/santad/SNTApplication.m

@@ -93,12 +93,14 @@
         break;
     }
 
-    // The filter is reset when santad disconnects from the driver.
-    // Add the default filters.
-    [_eventProvider fileModificationPrefixFilterAdd:@[ @"/.", @"/dev/" ]];
+    dispatch_async(dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0), ^{
+      // The filter is reset when santad disconnects from the driver.
+      // Add the default filters.
+      [self.eventProvider fileModificationPrefixFilterAdd:@[ @"/.", @"/dev/" ]];
 
-    // TODO(bur): Add KVO handling for fileChangesPrefixFilters.
-    [_eventProvider fileModificationPrefixFilterAdd:[configurator fileChangesPrefixFilters]];
+      // TODO(bur): Add KVO handling for fileChangesPrefixFilters.
+      [self.eventProvider fileModificationPrefixFilterAdd:[configurator fileChangesPrefixFilters]];
+    });
 
     self.notQueue = [[SNTNotificationQueue alloc] init];
     SNTSyncdQueue *syncdQueue = [[SNTSyncdQueue alloc] init];

version.bzl

@@ -1,3 +1,3 @@
 """The version for all Santa components."""
 
-SANTA_VERSION = "1.5"
+SANTA_VERSION = "1.6"