Use bundler groups instead of conditional

So that the gemfile.lock does not change across invocations

Gemfile

@@ -76,8 +76,7 @@ group :test do
   gem "mocha"
 end
 
-require_relative "lib/fizzy"
-if Fizzy.saas?
+group :saas, optional: true do
   gem "activeresource", require: "active_resource"
   gem "queenbee", git: "https://github.com/basecamp/queenbee-plugin"
   gem "fizzy-saas", path: "gems/fizzy-saas"

Gemfile.lock

@@ -1,3 +1,12 @@
+GIT
+  remote: https://github.com/basecamp/queenbee-plugin
+  revision: 15faf03a876c5e66b67753d2e1ddb24f1eb5abb2
+  specs:
+    queenbee (3.2.0)
+      activeresource
+      builder
+      rexml
+
 GIT
   remote: https://github.com/basecamp/rails-structured-logging
   revision: 76960cb5c15fc2b6b5f7542e05d7dcc031cef9e6
@@ -122,6 +131,14 @@ GIT
       tsort (>= 0.2)
       zeitwerk (~> 2.6)
 
+PATH
+  remote: gems/fizzy-saas
+  specs:
+    fizzy-saas (0.1.0)
+      queenbee
+      rails (>= 8.1.0.beta1)
+      rails_structured_logging
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -567,6 +584,7 @@ PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
+  activeresource
   autotuner
   aws-sdk-s3
   bcrypt (~> 3.1.7)
@@ -577,6 +595,7 @@ DEPENDENCIES
   capybara
   debug
   faker
+  fizzy-saas!
   geared_pagination (~> 1.2)
   image_processing (~> 1.14)
   importmap-rails
@@ -592,6 +611,7 @@ DEPENDENCIES
   prometheus-client-mmap (~> 1.3)
   propshaft
   puma (>= 5.0)
+  queenbee!
   rack-mini-profiler
   rails!
   rails_structured_logging!

bin/rails

@@ -1,4 +1,15 @@
 #!/usr/bin/env ruby
-APP_PATH = File.expand_path('../config/application', __dir__)
-require_relative '../config/boot'
-require 'rails/commands'
+APP_PATH = File.expand_path("../config/application", __dir__)
+
+require_relative "../lib/fizzy"
+
+if Fizzy.saas?
+  ENV["BUNDLE_WITH"] = [ ENV["BUNDLE_WITH"] , "saas" ].compact.join(",")
+end
+
+require_relative "../config/boot"
+
+puts "SaaS version (#{Fizzy.db_adapter})" if Fizzy.saas?
+
+require "rails/commands"
+

config/application.rb

@@ -2,7 +2,9 @@ require_relative "boot"
 require "rails/all"
 require_relative "../lib/fizzy"
 
-Bundler.require(*Rails.groups)
+groups = Rails.groups
+groups << :saas if Fizzy.saas?
+Bundler.require(*groups)
 
 module Fizzy
   class Application < Rails::Application