Enable reloading in development

Gemfile

@@ -170,6 +170,7 @@ end
 group :development do
   gem 'debugger-linecache'
   gem 'foreman'
+  gem 'listen'
   gem 'pry', '~> 0.13.0'
   gem 'pry-byebug', '~> 3.9.0'
   gem 'rubocop'

Gemfile.lock

@@ -373,6 +373,9 @@ GEM
     letter_opener (1.7.0)
       launchy (~> 2.2)
     libv8-node (15.14.0.1)
+    listen (3.7.0)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
     loofah (2.12.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
@@ -768,6 +771,7 @@ DEPENDENCIES
   jwt (~> 2.3)
   knapsack
   letter_opener (>= 1.4.1)
+  listen
   mimemagic (> 0.3.5)
   mini_racer (= 0.4.0)
   monetize (~> 1.11)

config/application.rb

@@ -152,12 +152,18 @@ module Openfoodnetwork
       #{config.root}/app/jobs
     )
 
-    initializer "ofn.reports" do |_app|
+    initializer "ofn.reports" do |app|
       module ::Reporting; end
       loader = Zeitwerk::Loader.new
       loader.push_dir("#{Rails.root}/lib/reporting", namespace: ::Reporting)
+      loader.enable_reloading
       loader.setup
       loader.eager_load
+
+      if Rails.env.development?
+        require 'listen'
+        Listen.to("lib/reporting") { loader.reload }.start
+      end
     end
 
     config.paths["config/routes.rb"] = %w(