feat: exclude insights from rake tasks config (#697)

This introduces a new configuration option
`insights.exclude_rake_tasks`. By default this includes the
`assets:precompile` rake task commonly executed in Rails. This can be
overridden to include other tasks when needed.

Author: roelbondoc

lib/honeybadger/config.rb

@@ -289,7 +289,18 @@ def load_plugin?(name)
     end
 
     def insights_enabled?
-      public? && !!self[:'insights.enabled']
+      return false unless public?
+      return false if insights_exclude_for_rake_tasks?
+      !!self[:'insights.enabled']
+    end
+
+    def insights_exclude_for_rake_tasks?
+      return false unless defined?(Rake) && Rake.application&.top_level_tasks
+
+      current_tasks = Array(Rake.application.top_level_tasks)
+      excluded_tasks = Array(self[:'insights.exclude_rake_tasks'])
+
+      (current_tasks & excluded_tasks).any?
     end
 
     def cluster_collection?(name)

lib/honeybadger/config/defaults.rb

@@ -497,6 +497,11 @@ class Boolean; end
         default: 60,
         type: Integer
       },
+      :'insights.exclude_rake_tasks' => {
+        description: "List of Rake tasks to exclude from Insights instrumentation.",
+        default: ['assets:precompile'],
+        type: Array
+      },
       :'puma.insights.events' => {
         description: 'Enable automatic event capturing for Puma stats.',
         default: true,