1 files changed, 39 insertions, 0 deletions
diff --git a/railties/lib/rails/commands/notes/notes_command.rb b/railties/lib/rails/commands/notes/notes_command.rb
new file mode 100644
index 0000000000..a0faaeff8f
--- /dev/null
+++ b/railties/lib/rails/commands/notes/notes_command.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+require "rails/source_annotation_extractor"
+
+module Rails
+  module Command
+    class NotesCommand < Base # :nodoc:
+      class_option :annotations, aliases: "-a", desc: "Filter by specific annotations, e.g. Foobar TODO", type: :array, default: %w(OPTIMIZE FIXME TODO)
+
+      def perform(*)
+        require_application_and_environment!
+
+        deprecation_warning
+        display_annotations
+      end
+
+      private
+        def display_annotations
+          annotations = options[:annotations]
+          tag = (annotations.length > 1)
+
+          Rails::SourceAnnotationExtractor.enumerate annotations.join("|"), tag: tag, dirs: directories
+        end
+
+        def directories
+          Rails::SourceAnnotationExtractor::Annotation.directories + source_annotation_directories
+        end
+
+        def deprecation_warning
+          return if source_annotation_directories.empty?
+          ActiveSupport::Deprecation.warn("`SOURCE_ANNOTATION_DIRECTORIES` will be deprecated in Rails 6.1. You can add default directories by using config.annotations.register_directories instead.")
+        end
+
+        def source_annotation_directories
+          ENV["SOURCE_ANNOTATION_DIRECTORIES"].to_s.split(",")
+        end
+    end
+  end
+end