adds --skip-listen to the application generator [closes #23590]

3 files changed, 10 insertions, 3 deletions

diff --git a/railties/lib/rails/generators/app_base.rb b/railties/lib/rails/generators/app_base.rb
index 8f8c2ec9e1..9adfcc6ee7 100644
--- a/railties/lib/rails/generators/app_base.rb
+++ b/railties/lib/rails/generators/app_base.rb
@@ -63,6 +63,9 @@ module Rails
         class_option :skip_spring,        type: :boolean, default: false,
                                           desc: "Don't install Spring application preloader"
 
+        class_option :skip_listen,        type: :boolean, default: false,
+                                          desc: "Don't generate configuration that depends on the listen gem"
+
         class_option :skip_javascript,    type: :boolean, aliases: '-J', default: false,
                                           desc: 'Skip JavaScript files'
 
@@ -390,6 +393,10 @@ module Rails
         !options[:skip_spring] && !options.dev? && Process.respond_to?(:fork) && !RUBY_PLATFORM.include?("cygwin")
       end
 
+      def depend_on_listen?
+        !options[:skip_listen] && os_supports_listen_out_of_the_box?
+      end
+
       def os_supports_listen_out_of_the_box?
         RbConfig::CONFIG['host_os'] =~ /darwin|linux/
       end
diff --git a/railties/lib/rails/generators/rails/app/templates/Gemfile b/railties/lib/rails/generators/rails/app/templates/Gemfile
index c3fad31f23..f3bc9d9734 100644
--- a/railties/lib/rails/generators/rails/app/templates/Gemfile
+++ b/railties/lib/rails/generators/rails/app/templates/Gemfile
@@ -38,13 +38,13 @@ group :development do
   gem 'web-console', '~> 3.0'
   <%- end -%>
 <%- end -%>
-<% if os_supports_listen_out_of_the_box? -%>
+<% if depend_on_listen? -%>
   gem 'listen', '~> 3.0.5'
 <% end -%>
 <% if spring_install? -%>
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
-<% if os_supports_listen_out_of_the_box? -%>
+<% if depend_on_listen? -%>
   gem 'spring-watcher-listen', '~> 2.0.0'
 <% end -%>
 <% end -%>
diff --git a/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt b/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
index 3451ade158..d4e2b1c756 100644
--- a/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
+++ b/railties/lib/rails/generators/rails/app/templates/config/environments/development.rb.tt
@@ -58,5 +58,5 @@ Rails.application.configure do
 
   # Use an evented file watcher to asynchronously detect changes in source code,
   # routes, locales, etc. This feature depends on the listen gem.
-  <%= '# ' unless os_supports_listen_out_of_the_box? %>config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+  <%= '# ' unless depend_on_listen? %>config.file_watcher = ActiveSupport::EventedFileUpdateChecker
 end