Replace to shakapacker from webpacker

bin/webpacker

@@ -1,18 +1,14 @@
 #!/usr/bin/env ruby
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
-ENV["NODE_ENV"]  ||= "development"
-
 require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
-
-require "rubygems"
 require "bundler/setup"
-
 require "webpacker"
 require "webpacker/webpack_runner"
 
+ENV["RAILS_ENV"] ||= "development"
+ENV["NODE_ENV"]  ||= ENV["RAILS_ENV"]
+ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile", Pathname.new(__FILE__).realpath)
+
 APP_ROOT = File.expand_path("..", __dir__)
 Dir.chdir(APP_ROOT) do
   Webpacker::WebpackRunner.run(ARGV)

bin/webpacker-dev-server

@@ -1,13 +1,12 @@
 #!/usr/bin/env ruby
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
-ENV["NODE_ENV"]  ||= "development"
+ENV["RAILS_ENV"] ||= "development"
+ENV["NODE_ENV"]  ||= ENV["RAILS_ENV"]
 
 require "pathname"
 ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
   Pathname.new(__FILE__).realpath)
 
-require "rubygems"
 require "bundler/setup"
 
 require "webpacker"

bin/yarn

@@ -1,17 +0,0 @@
-#!/usr/bin/env ruby
-APP_ROOT = File.expand_path('..', __dir__)
-Dir.chdir(APP_ROOT) do
-  yarn = ENV["PATH"].split(File::PATH_SEPARATOR).
-    select { |dir| File.expand_path(dir) != __dir__ }.
-    product(["yarn", "yarn.cmd", "yarn.ps1"]).
-    map { |dir, file| File.expand_path(file, dir) }.
-    find { |file| File.executable?(file) }
-
-  if yarn
-    exec yarn, *ARGV
-  else
-    $stderr.puts "Yarn executable was not detected in the system."
-    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
-    exit 1
-  end
-end