Add Que integration

lib/bugsnag.rb

@@ -130,7 +130,7 @@ def after_notify_callbacks
   end
 end
 
-[:resque, :sidekiq, :mailman, :delayed_job].each do |integration|
+[:resque, :sidekiq, :mailman, :delayed_job, :que].each do |integration|
   begin
     require "bugsnag/#{integration}"
   rescue LoadError

lib/bugsnag/que.rb

@@ -0,0 +1,31 @@
+if defined?(::Que)
+  Que.error_handler = proc do |error, job|
+    begin
+      job = job.dup # Make sure the original job object is not mutated.
+
+      Bugsnag.configuration.app_type = "que"
+
+      Bugsnag.auto_notify(error) do |notification|
+        job[:error_count] += 1
+
+        # If the job was scheduled using ActiveJob then unwrap the job details for clarity:
+        if job[:job_class] == "ActiveJob::QueueAdapters::QueAdapter::JobWrapper"
+          wrapped_job = job[:args].last
+          wrapped_job = wrapped_job.each_with_object({}) { |(k, v), result| result[k.to_sym] = v } # Symbolize keys
+
+          # Align key names with keys in `job`
+          wrapped_job[:queue] = wrapped_job.delete(:queue_name)
+          wrapped_job[:args]  = wrapped_job.delete(:arguments)
+
+          job.merge!(wrapper_job_class: job[:job_class], wrapper_job_id: job[:job_id]).merge!(wrapped_job)
+        end
+
+        notification.add_tab(:job, job)
+      end
+    rescue => e
+      # Que supresses errors raised by its error handler to avoid killing the worker. Log them somewhere:
+      Bugsnag.warn("Failed to notify Bugsnag of error in Que job (#{e.class}): #{e.message} \n#{e.backtrace[0..9].join("\n")}")
+      raise
+    end
+  end
+end