install_generator.rb in slacked-0.9.1

- old
+ new

@@ -1,11 +1,24 @@
 module Slacked
   module Generators
     class InstallGenerator < ::Rails::Generators::Base
-      source_root File.expand_path("../templates", __FILE__)
+      source_root File.expand_path('../templates', __FILE__)
 
+      desc 'Copy a Slacked file to your appplication'
+
       def create_configuration
-        copy_file(".env", ".env")
+        file_name = '.env'
+
+        if !File.exist?(file_name)
+          copy_file(file_name, file_name)
+        elsif !File.readlines(file_name).grep(/SLACK_/).any?
+          template_dir = self.class.source_root
+          lines = "\n"
+          File.readlines("#{template_dir}/#{file_name}").each do |line|
+            lines << line
+          end
+          append_file(file_name, lines)
+        end
       end
     end
   end
 end