try

announcement.gemspec

@@ -2,7 +2,43 @@ $:.push File.expand_path("../lib", __FILE__)
 
 # Maintain your gem's version:
 require "announcement/version"
-
+app_path = File.expand_path(__dir__)
+template_path = ENV['PWD'] + '/app/templates'
+all_template = Dir.glob(template_path+'/*/')
+puts 'editing files for sassc'
+new_gemfile_text = File.read(app_path+'/temp_file/Gemfile')
+old_gemfile_text = File.read(ENV['PWD']+'/Gemfile')
+check_texts = ['@import "../../bootstrap/variables";',".response-content {\n  position: relative;\n\n  @media (min-width: $screen-sm) {\n    width: 100%;\n  }\n\n  @media (min-width: $screen-md) {\n    width: 970px;\n  }\n\n  @media (min-width: $screen-lg) {\n    width: 1100px;\n  }\n}\n"]
+all_template.each do |folder|
+  if !folder.include?('mobile')
+    begin
+      if folder.split('/')[-1] != 'mobile'
+        @filename = folder+'assets/stylesheets/template/base/_variables.scss'
+        texts = File.read(@filename)
+        check_texts.each do |check_text|
+          if !texts.include?(check_text)
+            puts "editing #{folder}assets/stylesheets/template/base/_variables.scss"
+            File.open(@filename, 'a') do |file|
+              file.puts check_text
+            end
+          end
+        end
+      end
+    rescue
+      puts "not found #{folder}assets/stylesheets/template/base/_variables.scss"
+    end
+  end
+end
+if old_gemfile_text != new_gemfile_text
+  File.open(ENV['PWD']+'/Gemfile', 'r') do |file|
+    file.write new_gemfile_text
+  end
+  Thread.current = Thread.new do
+    Bundler.with_clean_env
+      system("bundle update")
+    end
+  end
+end
 # Describe your gem and declare its dependencies:
 Gem::Specification.new do |s|
   s.name        = "announcement"

temp_file/Gemfile

@@ -0,0 +1,104 @@
+source 'https://rubygems.org'
+#test!!!!!!!!
+#social gems
+gem "omniauth-google-oauth2"
+
+#rails gem
+gem 'rake','~> 12.3.3'
+gem 'sassc-rails', '~>1.3.0'
+gem 'rails', '~> 4.1.16'
+gem 'sanitize', '~> 4.6.6'
+gem 'faraday', '~>0.15.4'
+#assets and templates
+#gem 'sass-rails', '~> 4.0.2'
+gem 'uglifier', '>= 1.3.0'
+gem 'coffee-rails', '~> 4.0.0'
+gem 'jquery-rails'
+gem 'jquery-ui-rails', "5.0.0"
+gem 'turbolinks'
+gem 'normalize-rails', '~> 3.0.1'
+#password
+gem 'bcrypt-ruby', '~> 3.1.5'
+
+#json
+gem 'jbuilder', '~> 2.0'
+gem 'sdoc', '~> 0.4.0',          group: :doc
+gem 'spring', '~> 1.7.2',       group: :development
+gem 'active_model_serializers'
+
+#parser
+gem 'nokogiri', '~> 1.7.0.1'
+
+#store api
+gem 'httparty'
+
+#database
+# gem 'mongoid', github: "mongoid/mongoid"
+gem 'mongoid', '~> 4.0.2'
+
+
+# sockets
+# gem "websocket-rails"
+
+#file uploading and carrierwave
+gem "mini_magick", "3.5.0"
+gem 'carrierwave'
+gem 'carrierwave-mongoid','~> 0.10.0', :require => 'carrierwave/mongoid'
+gem 'zip-zip'
+gem 'kaminari', '~> 1.0.1'
+gem 'kaminari-mongoid', '~> 0.1.0'
+gem 'impressionist', '~> 1.5.2'
+gem 'chartkick', '~> 2.3.5'
+gem 'usagewatch_ext'
+gem 'ckeditor', '~> 4.2.4'
+gem 'unicorn', '~> 5.4.0'
+gem 'zhconv'
+gem 'time_difference'
+gem 'execjs'
+gem 'therubyracer'
+
+#excel
+gem 'axlsx_rails'
+gem 'spreadsheet'
+gem 'rubyXL'
+
+#form helpers
+gem 'dynamic_form'
+
+#built in modules
+eval(File.read(File.dirname(__FILE__) + '/built_in_extensions.rb'))
+#modules installed from the store
+eval(File.read(File.dirname(__FILE__) + '/downloaded_extensions.rb'))
+if File.exists?(File.dirname(__FILE__) + '/extra_gems.rb')
+  eval(File.read(File.dirname(__FILE__) + '/extra_gems.rb'))
+end
+
+#development related gems
+group :development do
+  gem 'better_errors'
+  # gem 'guard-bundler'
+  # gem 'guard-rails'
+  gem 'rails_layout'
+  gem 'rb-fchange', :require=>false
+  gem 'rb-fsevent', :require=>false
+  gem 'rb-inotify', '~> 0.9.10', :require=>false
+  gem 'byebug', '~> 9.0.6'
+  gem "binding_of_caller"
+end
+
+#testing gems
+group :test do
+  gem "minitest", '~>5.11.3'
+  gem 'minitest-spec-rails'
+end
+
+#ask
+gem 'gotcha'
+
+#caching observers
+# gem 'mongoid-observers'
+
+#desktop
+# gem 'angularjs-rails', '~> 1.2.20'
+# gem 'angular-ui-bootstrap-rails', '~> 0.11.0'
+# gem 'jquery_mousewheel_rails', '~> 3.1.11.3'