allow apps to not include the user in a notification

While some may find the current OS user helpful, in other contexts, that user is randomly assigned and not material to the notification itself. Consider a deployment enviroment like Heroku, which will use a different OS user for each deployable, and each deploy.

It may also cause grouping issues in services like Sentry, which use the exception / notification content to determine whether the situation has occurred already.

This does not change the default behavior, but rather introduces a new option to skip including that information in notifications, for those who want to.

README.md

@@ -102,6 +102,7 @@ The code above will enable all of the Bullet notification systems:
 * `Bullet.slack`: add notifications to slack
 * `Bullet.raise`: raise errors, useful for making your specs fail unless they have optimized queries
 * `Bullet.always_append_html_body`: always append the html body even if no notifications are present. Note: `console` or `add_footer` must also be true. Useful for Single Page Applications where the initial page load might not have any notifications present.
+* `Bullet.skip_user_in_notification`: exclude the OS user (`whoami`) from notifications.
 
 
 Bullet also allows you to disable any of its detectors.

lib/bullet.rb

@@ -40,7 +40,7 @@ class << self
                 :stacktrace_excludes,
                 :skip_html_injection
     attr_reader :safelist
-    attr_accessor :add_footer, :orm_patches_applied, :skip_http_headers, :always_append_html_body
+    attr_accessor :add_footer, :orm_patches_applied, :skip_http_headers, :always_append_html_body, :skip_user_in_notification
 
     available_notifiers =
       UniformNotifier::AVAILABLE_NOTIFIERS.select { |notifier| notifier != :raise }

lib/bullet/notification/base.rb

@@ -51,11 +51,22 @@ def notify_out_of_channel
       end
 
       def short_notice
-        [whoami.presence, url, title, body].compact.join('  ')
+        parts = []
+        parts << whoami.presence unless Bullet.skip_user_in_notification
+        parts << url
+        parts << title
+        parts << body
+
+        parts.compact.join('  ')
       end
 
       def notification_data
-        { user: whoami, url: url, title: title, body: body_with_caller }
+        hash = {}
+        hash[:user] = whoami unless Bullet.skip_user_in_notification
+        hash[:url] = url
+        hash[:title] = title
+        hash[:body] = body_with_caller
+        hash
       end
 
       def eql?(other)

spec/bullet/notification/base_spec.rb

@@ -70,6 +70,18 @@ def temp_env_variable(name, value)
           allow(subject).to receive(:body_with_caller).and_return('body_with_caller')
           expect(subject.notification_data).to eq(user: 'whoami', url: 'url', title: 'title', body: 'body_with_caller')
         end
+
+        context 'when skip_user_in_notification is true' do
+          before { allow(Bullet).to receive(:skip_user_in_notification).and_return(true) }
+
+          it 'should return notification data without user' do
+            allow(subject).to receive(:url).and_return('url')
+            allow(subject).to receive(:title).and_return('title')
+            allow(subject).to receive(:body_with_caller).and_return('body_with_caller')
+
+            expect(subject.notification_data).to eq(url: 'url', title: 'title', body: 'body_with_caller')
+          end
+        end
       end
 
       context '#notify_inline' do