Define Rails.autoloaders.logger=

2 files changed, 28 insertions, 0 deletions

diff --git a/railties/lib/rails/autoloaders.rb b/railties/lib/rails/autoloaders.rb
index b03499cf81..4b41e1faf9 100644
--- a/railties/lib/rails/autoloaders.rb
+++ b/railties/lib/rails/autoloaders.rb
@@ -24,6 +24,11 @@ module Rails
         end
       end
 
+      def logger=(logger)
+        callable_or_nil = logger.respond_to?(:debug) ? logger.method(:debug) : logger
+        each { |loader| loader.logger = callable_or_nil }
+      end
+
       def zeitwerk_enabled?
         Rails.configuration.autoloader == :zeitwerk
       end
diff --git a/railties/test/application/zeitwerk_integration_test.rb b/railties/test/application/zeitwerk_integration_test.rb
index bbb97e983a..8a8ca18ebf 100644
--- a/railties/test/application/zeitwerk_integration_test.rb
+++ b/railties/test/application/zeitwerk_integration_test.rb
@@ -206,4 +206,27 @@ class ZeitwerkIntegrationTest < ActiveSupport::TestCase
     assert_equal Module, Module.method(:const_missing).owner
     assert_equal :no_op, deps.unhook!
   end
+
+  test "autoloaders.logger=" do
+    boot
+
+    logger = ->(_msg) { }
+    Rails.autoloaders.logger = logger
+
+    Rails.autoloaders.each do |autoloader|
+      assert_equal logger, autoloader.logger
+    end
+
+    Rails.autoloaders.logger = Rails.logger
+
+    Rails.autoloaders.each do |autoloader|
+      assert_equal Rails.logger.method(:debug), autoloader.logger
+    end
+
+    Rails.autoloaders.logger = nil
+
+    Rails.autoloaders.each do |autoloader|
+      assert_nil autoloader.logger
+    end
+  end
 end