Accept mode as argument in `file_write' action

lib/producer/core/actions/file_writer.rb

@@ -3,7 +3,12 @@ module Producer
     module Actions
       class FileWriter < Action
         def apply
-          fs.file_write path, content
+          case arguments.size
+          when 2
+            fs.file_write path, content
+          when 3
+            fs.file_write path, content, mode
+          end
         end
 
         def path
@@ -13,6 +18,10 @@ module Producer
         def content
           arguments[1]
         end
+
+        def mode
+          arguments[2]
+        end
       end
     end
   end

lib/producer/core/remote/fs.rb

@@ -30,8 +30,8 @@ module Producer
           nil
         end
 
-        def file_write(path, content)
-          sftp.file.open path, 'w' do |f|
+        def file_write(path, content, mode = nil)
+          sftp.file.open path, 'w', mode do |f|
             f.write content
           end
         end