Ensure only constants that extend Module are parsed from requested paths

lib/tapioca/commands/abstract_dsl.rb

@@ -170,7 +170,9 @@ def constantize(constant_names, ignore_missing: false)
           raise Thor::Error, ""
         end
 
-        processable_constants.map { |_, constant| constant }
+        processable_constants
+          .map { |_, constant| constant }
+          .grep(Module)
       end
 
       sig { params(compiler_names: T::Array[String]).returns(T::Array[T.class_of(Tapioca::Dsl::Compiler)]) }

spec/tapioca/cli/dsl_spec.rb

@@ -1840,6 +1840,65 @@ def saved_change_to_reviewer?; end
 
           assert_success_status(result)
         end
+
+        it "generates RBIs for ActiveResource containing arbitrary constants, and referenced by file path" do
+          @project.require_real_gem("activeresource")
+          @project.bundle_install!
+          @project.write!("lib/post.rb", <<~RUBY)
+            require "active_resource"
+
+            class Post < ActiveResource::Base
+              SOME_CONSTANT = 123
+
+              schema do
+                integer 'id'
+              end
+            end
+          RUBY
+
+          result = @project.tapioca("dsl lib/post.rb")
+
+          assert_stdout_equals(<<~OUT, result)
+            Loading DSL extension classes... Done
+            Loading Rails application... Done
+            Loading DSL compiler classes... Done
+            Compiling DSL RBI files...
+
+                  create  sorbet/rbi/dsl/post.rbi
+
+            Done
+
+            Checking generated RBI files...  Done
+              No errors found
+
+            All operations performed in working directory.
+            Please review changes and commit them.
+          OUT
+
+          assert_empty_stderr(result)
+
+          assert_project_file_equal("sorbet/rbi/dsl/post.rbi", <<~RUBY)
+            # typed: true
+
+            # DO NOT EDIT MANUALLY
+            # This is an autogenerated file for dynamic methods in `Post`.
+            # Please instead update this file by running `bin/tapioca dsl Post`.
+
+
+            class Post
+              sig { returns(Integer) }
+              def id; end
+
+              sig { params(value: Integer).returns(Integer) }
+              def id=(value); end
+
+              sig { returns(T::Boolean) }
+              def id?; end
+            end
+          RUBY
+
+          assert_success_status(result)
+        end
       end
 
       describe "verify" do