Basic --webpack delegation to new webpacker gem (#27288)

2 files changed, 16 insertions, 1 deletions

diff --git a/railties/lib/rails/generators/app_base.rb b/railties/lib/rails/generators/app_base.rb
index aba68d6db2..2f7339e7f5 100644
--- a/railties/lib/rails/generators/app_base.rb
+++ b/railties/lib/rails/generators/app_base.rb
@@ -33,6 +33,9 @@ module Rails
         class_option :javascript,         type: :string, aliases: "-j",
                                           desc: "Preconfigure for selected JavaScript library"
 
+        class_option :webpack,            type: :boolean, default: false,
+                                          desc: "Preconfigure for app-like JavaScript with Webpack"
+
         class_option :skip_yarn,          type: :boolean, default: false,
                                           desc: "Don't use Yarn for managing JavaScript dependencies"
 
@@ -128,6 +131,7 @@ module Rails
          database_gemfile_entry,
          webserver_gemfile_entry,
          assets_gemfile_entry,
+         webpacker_gemfile_entry,
          javascript_gemfile_entry,
          jbuilder_gemfile_entry,
          psych_gemfile_entry,
@@ -315,6 +319,13 @@ module Rails
         gems
       end
 
+      def webpacker_gemfile_entry
+        if options[:webpack]
+          comment = "Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker"
+          GemfileEntry.new "webpacker", "~> 0.1", comment
+        end
+      end
+
       def jbuilder_gemfile_entry
         comment = "Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder"
         GemfileEntry.new "jbuilder", "~> 2.5", comment, {}, options[:api]
@@ -414,6 +425,10 @@ module Rails
         bundle_command("install") if bundle_install?
       end
 
+      def run_webpack
+        rails_command "webpacker:install"
+      end
+
       def generate_spring_binstubs
         if bundle_install? && spring_install?
           bundle_command("exec spring binstub --all")
diff --git a/railties/lib/rails/generators/rails/app/app_generator.rb b/railties/lib/rails/generators/rails/app/app_generator.rb
index a8586d56dd..19d3ba2f0f 100644
--- a/railties/lib/rails/generators/rails/app/app_generator.rb
+++ b/railties/lib/rails/generators/rails/app/app_generator.rb
@@ -357,7 +357,7 @@ module Rails
       end
 
       public_task :apply_rails_template, :run_bundle
-      public_task :generate_spring_binstubs
+      public_task :run_webpack, :generate_spring_binstubs
 
       def run_after_bundle_callbacks
         @after_bundle_callbacks.each(&:call)