add transaction name to tags

Author: sl0thentr0py

sentry-ruby/lib/sentry/metrics/aggregator.rb

@@ -49,7 +49,7 @@ def add(type,
         # and buckets into 10 second intervals
         bucket_timestamp = (timestamp / ROLLUP_IN_SECONDS) * ROLLUP_IN_SECONDS
 
-        serialized_tags = serialize_tags(tags.merge(@default_tags))
+        serialized_tags = serialize_tags(get_updated_tags(tags))
         bucket_key = [type, key, unit, serialized_tags]
 
         @mutex.synchronize do
@@ -161,6 +161,23 @@ def sanitize_key(key)
       def sanitize_value(value)
         value.gsub(VALUE_SANITIZATION_REGEX, '')
       end
+
+      def get_transaction_name
+        transaction = Sentry.get_current_scope&.get_transaction
+        return nil unless transaction
+        return nil if transaction.source_low_quality?
+
+        transaction.name
+      end
+
+      def get_updated_tags(tags)
+        updated_tags = @default_tags.merge(tags)
+
+        transaction_name = get_transaction_name
+        updated_tags['transaction'] = transaction_name if transaction_name
+
+        updated_tags
+      end
     end
   end
 end

sentry-ruby/lib/sentry/transaction.rb

@@ -302,6 +302,11 @@ def start_profiler!
       profiler.start
     end
 
+    # These are high cardinality and thus bad
+    def source_low_quality?
+      source == :url
+    end
+
     protected
 
     def init_span_recorder(limit = 1000)
@@ -337,11 +342,6 @@ def populate_head_baggage
       @baggage = Baggage.new(items, mutable: false)
     end
 
-    # These are high cardinality and thus bad
-    def source_low_quality?
-      source == :url
-    end
-
     class SpanRecorder
       attr_reader :max_length, :spans