Add suffix option

README.md

@@ -252,7 +252,7 @@ MyNamespace.translations["en"] = { ... }
 
 Setting the `prefix: "import I18n from 'i18n-js';\n"` option will add the line at the beggining of the resultant translation file.
 This can be useful to use this gem with the [i18n-js](https://www.npmjs.com/package/i18n-js) npm package, which is quite useful to use it with webpack.
-The user should provide the semi-colon and the newline character if needed.
+The user should provide the semi-colon and the newline character if needed. Note, the suffix option may also be used to wrap translations files.
 
 For example:
 

lib/i18n/js/formatters/base.rb

@@ -2,11 +2,12 @@ module I18n
   module JS
     module Formatters
       class Base
-        def initialize(js_extend: false, namespace: nil, pretty_print: false, prefix: nil)
+        def initialize(js_extend: false, namespace: nil, pretty_print: false, prefix: nil, suffix: nil)
           @js_extend    = js_extend
           @namespace    = namespace
           @pretty_print = pretty_print
           @prefix = prefix
+          @suffix = suffix
         end
 
         protected

lib/i18n/js/formatters/js.rb

@@ -9,7 +9,7 @@ def format(translations)
           translations.each do |locale, translations_for_locale|
             contents << line(locale, format_json(translations_for_locale))
           end
-          contents
+          contents << footer
         end
 
         protected
@@ -19,6 +19,10 @@ def header
           text + %(#{@namespace}.translations || (#{@namespace}.translations = {});\n)
         end
 
+        def footer
+          @suffix || ''
+        end
+
         def line(locale, translations)
           if @js_extend
             %(#{@namespace}.translations["#{locale}"] = I18n.extend((#{@namespace}.translations["#{locale}"] || {}), #{translations});\n)

lib/i18n/js/segment.rb

@@ -7,7 +7,7 @@ module JS
 
     # Class which enscapulates a translations hash and outputs a single JSON translation file
     class Segment
-      OPTIONS = [:namespace, :pretty_print, :js_extend, :prefix, :sort_translation_keys, :json_only].freeze
+      OPTIONS = [:namespace, :pretty_print, :js_extend, :prefix, :suffix, :sort_translation_keys, :json_only].freeze
       LOCALE_INTERPOLATOR = /%\{locale\}/
 
       attr_reader *([:file, :translations] | OPTIONS)
@@ -25,6 +25,7 @@ def initialize(file, translations, options = {})
         @pretty_print = !!options[:pretty_print]
         @js_extend    = options.key?(:js_extend) ? !!options[:js_extend] : true
         @prefix       = options.key?(:prefix) ? options[:prefix] : nil
+        @suffix       = options.key?(:suffix) ? options[:suffix] : nil
         @sort_translation_keys = options.key?(:sort_translation_keys) ? !!options[:sort_translation_keys] : true
         @json_only = options.key?(:json_only) ? !!options[:json_only] : false
       end
@@ -70,7 +71,9 @@ def formatter_options
         { js_extend: @js_extend,
           namespace: @namespace,
           pretty_print: @pretty_print,
-          prefix: @prefix }
+          prefix: @prefix,
+          suffix: @suffix
+        }
       end
     end
   end

package.json

@@ -8,7 +8,7 @@
     "i18n"
   ],
   "devDependencies": {
-    "jasmine-node": "^1.14.5"
+    "jasmine-node": "^1.16.2"
   },
   "main": "app/assets/javascripts/i18n.js",
   "scripts": {

spec/fixtures/js_file_with_namespace_prefix_and_pretty_print.yml

@@ -6,3 +6,4 @@ translations:
     namespace: "Foo"
     pretty_print: true
     prefix: "import random from 'random-library';\n"
+    suffix: "//test"

spec/ruby/i18n/js_spec.rb

@@ -351,7 +351,7 @@
     end
   end
 
-  context "namespace, prefix and pretty_print options" do
+  context "namespace, prefix, suffix, and pretty_print options" do
 
     before do
       stub_const('I18n::JS::DEFAULT_EXPORT_DIR_PATH', temp_path)
@@ -379,6 +379,7 @@
   "foo": "Foo",
   "fallback_test": "Success"
 };
+//test
 EOS
 }$/)
     end