Merge pull request #30015 from larskanis/use-duktake-on-mingw

Use duktape gem as default JS engine on Windows-MINGW

railties/lib/rails/generators/app_base.rb

@@ -348,6 +348,8 @@ def javascript_runtime_gemfile_entry
         comment = "See https://github.com/rails/execjs#readme for more supported runtimes"
         if defined?(JRUBY_VERSION)
           GemfileEntry.version "therubyrhino", nil, comment
+        elsif RUBY_PLATFORM =~ /mingw|mswin/
+          GemfileEntry.version "duktape", nil, comment
         else
           GemfileEntry.new "mini_racer", nil, comment, { platforms: :ruby }, true
         end

railties/test/generators/app_generator_test.rb

@@ -522,6 +522,8 @@ def test_inclusion_of_javascript_runtime
     run_generator
     if defined?(JRUBY_VERSION)
       assert_gem "therubyrhino"
+    elsif RUBY_PLATFORM =~ /mingw|mswin/
+      assert_gem "duktape"
     else
       assert_file "Gemfile", /# gem 'mini_racer', platforms: :ruby/
     end