Don’t create storage/ directory if not needed

The storage/ directory is used for sqlite or
Active Storage. If using a different database
and the --skip-active-storage option, this
directory is not needed.

Author: jeromedalbert

railties/lib/rails/generators/app_base.rb

@@ -366,6 +366,10 @@ def skip_active_storage? # :doc:
         options[:skip_active_storage]
       end
 
+      def skip_storage? # :doc:
+        skip_active_storage? && !sqlite3?
+      end
+
       def skip_action_cable? # :doc:
         options[:skip_action_cable]
       end
@@ -784,7 +788,7 @@ def edge_branch
       def dockerfile_chown_directories
         directories = %w(log tmp)
 
-        directories << "storage" unless skip_active_storage? && !sqlite3?
+        directories << "storage" unless skip_storage?
         directories << "db" unless skip_active_record?
 
         directories.sort

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -455,7 +455,7 @@ def create_system_test_files
       end
 
       def create_storage_files
-        build(:storage)
+        build(:storage) unless skip_storage?
       end
 
       def create_devcontainer_files

railties/test/generators/shared_generator_tests.rb

@@ -312,6 +312,13 @@ def test_generator_does_not_generate_active_storage_contents_if_skip_active_reco
     assert_no_file "#{application_path}/config/storage.yml"
   end
 
+  def test_generator_does_not_create_storage_dir_if_skip_active_storage_is_given_and_not_using_sqlite
+    run_generator [destination_root, "--skip-active-storage", "--database=postgresql"]
+
+    assert_no_directory "#{application_path}/storage"
+    assert_no_directory "#{application_path}/tmp/storage"
+  end
+
   def test_generator_if_skip_action_mailer_is_given
     run_generator [destination_root, "--skip-action-mailer"]
     assert_file "#{application_path}/config/application.rb", /#\s+require\s+["']action_mailer\/railtie["']/