diff --git a/announcement.gemspec b/announcement.gemspec
index 3d1b36a..ef8a5c3 100644
--- a/announcement.gemspec
+++ b/announcement.gemspec
@@ -2,29 +2,30 @@ $:.push File.expand_path("../lib", __FILE__)
 
 # Maintain your gem's version:
 require "announcement/version"
+env_pwd = ENV['PWD']
 app_path = File.expand_path(__dir__)
-template_path = ENV['PWD'] + '/app/templates'
+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')
+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"]
-git_url = %x[cd '#{ENV['PWD']}' && git config --get remote.origin.url].sub("\n",'')
-git_remote = %x[cd '#{ENV['PWD']}' && git remote].sub("\n",'')
+git_url = Bundler.with_clean_env{%x[cd '#{env_pwd}' && git config --get remote.origin.url].sub("\n",'')}
+git_remote = Bundler.with_clean_env{%x[cd '#{env_pwd}' && git remote].sub("\n",'')}
 if git_url != 'https://ruling.digital/git'
   puts 'changing remote url'
-  system("cd #{ENV['PWD']} && git remote set-url #{git_remote} https://ruling.digital/git")
+  Bundler.with_clean_env{system("cd #{env_pwd} && git remote set-url #{git_remote} https://ruling.digital/git")}
 end
 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)
+        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.open(filename, 'a') do |file|
               file.puts check_text
             end
           end
@@ -38,59 +39,62 @@ end
 if old_gemfile_text != new_gemfile_text
   unicorn_rails = %x[which unicorn_rails].sub("\n",'')
   puts 'updating gemfile'
-  %x[cp -f '#{ENV['PWD']}'/Gemfile '#{ENV['PWD']}'/Gemfile.bak123]
-  %x[cp -f '#{app_path}'/temp_file/Gemfile '#{ENV['PWD']}'/Gemfile]
-  old_playground = File.read (ENV['PWD']+'/app/controllers/admin/playground_controller.rb') rescue ''
+  Bundler.with_clean_env{%x[cp -f '#{env_pwd}'/Gemfile '#{env_pwd}'/Gemfile.bak123]}
+  Bundler.with_clean_env{%x[cp -f '#{app_path}'/temp_file/Gemfile '#{env_pwd}'/Gemfile]}
+  old_playground = File.read (env_pwd+'/app/controllers/admin/playground_controller.rb') rescue ''
   new_playground = File.read (app_path+'/temp_file/playground_controller.rb') rescue ''
   command2 = ''
   if old_playground != new_playground
     puts 'updating playground'
-    command2 = "cp -f #{app_path}/temp_file/playground_controller.rb #{ENV['PWD']}/app/controllers/admin/playground_controller.rb ;"
+    command2 = "cp -f #{app_path}/temp_file/playground_controller.rb #{env_pwd}/app/controllers/admin/playground_controller.rb &&"
     #File.open(ENV['PWD']+'/app/controllers/admin/playground_controller.rb', 'w') do |file|
     #  file.write new_playground
     #end
   end
-  old_multithread = File.read (ENV['PWD']+'/app/models/multithread.rb') rescue ''
+  old_multithread = File.read (env_pwd+'/app/models/multithread.rb') rescue ''
   new_multithread = File.read (app_path+'/temp_file/multithread.rb') rescue ''
   command3 = ''
   if old_multithread != new_multithread
     puts 'updating multithread'
-    command3 = "cp -f #{app_path}/temp_file/multithread.rb #{ENV['PWD']}/app/models/multithread.rb ;"
+    command3 = "cp -f #{app_path}/temp_file/multithread.rb #{env_pwd}/app/models/multithread.rb &&"
     #File.open(ENV['PWD']+'/app/models/multithread.rb', 'w') do |file|
     #  file.write new_multithread
     #end
   end
-  command4 = "cp -rf #{app_path}/temp_file/app #{ENV['PWD']}/app"
-  log_development = File.mtime(ENV['PWD']+'/log/development.log').strftime('%Y%m%d%H%M').to_i rescue 0
-  log_production = File.mtime(ENV['PWD']+'/log/production.log').strftime('%Y%m%d%H%M').to_i rescue 0
+  command4 = "cp -rf #{app_path}/temp_file/app #{env_pwd}"
+  log_development = File.mtime(env_pwd+'/log/development.log').strftime('%Y%m%d%H%M').to_i rescue 0
+  log_production = File.mtime(env_pwd+'/log/production.log').strftime('%Y%m%d%H%M').to_i rescue 0
   if log_development > log_production
       mode = 'development'
   else
       mode = 'production'
   end
-  files = Dir[ENV['PWD']+'/Gemfile.lock']
-  dir_name = ENV['PWD'].split('/')[-1]
-  Bundler.with_clean_env{%x[screen -ls | grep auto_reopen_#{dir_name} | cut -d. -f1 | awk '{print $1}' | xargs kill]}
-  if files.count ==0
-    command1 = "cd #{ENV['PWD']} && gem install bundler -v 1.17.3 && bundle update"
-  else
-    command1 = "cd #{ENV['PWD']} && gem install bundler -v 1.17.3 && mv -f Gemfile.lock Gemfile.lock.bak123 && bundle update"
+  files = Dir[env_pwd+'/Gemfile.lock']
+  dir_name = env_pwd.split('/')[-1]
+  watch_dog = %x[screen -ls auto_reopen_#{dir_name}]
+  if watch_dog.scan("auto_reopen_#{dir_name}").count != 0
+    Bundler.with_clean_env{%x[screen -ls | grep auto_reopen_#{dir_name} | cut -d. -f1 | awk '{print $1}' | xargs kill]}
   end
-  Bundler.with_clean_env{system("screen -d -m -S auto_reopen_#{dir_name} watch -n 30 bundle exec #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now")}
-  filedata = File.read(ENV['PWD']+"/built_in_extensions.rb")
+  if files.count ==0
+    command1 = "cd #{env_pwd} && gem install bundler -v 1.17.3 && bundle update"
+  else
+    command1 = "cd #{env_pwd} && gem install bundler -v 1.17.3 && mv -f Gemfile.lock Gemfile.lock.bak123 && bundle update"
+  end
+  Bundler.with_clean_env{system("cd #{env_pwd} && screen -d -m -S auto_reopen_#{dir_name} watch -n 30 bundle exec #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now")}
+  filedata = File.read(env_pwd+"/built_in_extensions.rb")
   exist_str = "gem 'patchfile', git: 'http://gitlab.tp.rulingcom.com/chiu/patch_file.git'"
   if filedata.include? exist_str
       puts "patchfile exist"
   else
-      @file = ENV['PWD']+"/built_in_extensions.rb"
-      open(@file, 'a') { |f|
+      file = env_pwd+"/built_in_extensions.rb"
+      open(file, 'a') { |f|
         f.puts exist_str
       }
   end
-  all_command = "#{command1} && cd #{ENV['PWD']} && #{command2} #{command3} #{command4} && kill -s TERM `cat tmp/pids/unicorn.pid`; bundle exec #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now"
+  all_command = "#{command1} && cd #{env_pwd} && #{command2} #{command3} #{command4} && kill -s TERM `cat tmp/pids/unicorn.pid` && bundle exec #{unicorn_rails} -c config/unicorn.rb -D -E #{mode}|at now"
   a = Thread.start do
     Bundler.with_clean_env do
-        puts ENV['PWD']
+        puts env_pwd
         puts mode
         exec(all_command)
     end