Replace multi_json with json

lib/sprockets/base.rb

@@ -5,7 +5,7 @@
 require 'sprockets/processed_asset'
 require 'sprockets/server'
 require 'sprockets/static_asset'
-require 'multi_json'
+require 'json'
 require 'pathname'
 
 module Sprockets
@@ -433,15 +433,8 @@ def matches_filter(filters, logical_path, filename)
         end
       end
 
-      # Feature detect newer MultiJson API
-      if MultiJson.respond_to?(:dump)
-        def json_decode(obj)
-          MultiJson.load(obj)
-        end
-      else
-        def json_decode(obj)
-          MultiJson.decode(obj)
-        end
+      def json_decode(obj)
+        JSON.load(obj)
       end
   end
 end

lib/sprockets/manifest.rb

@@ -1,4 +1,4 @@
-require 'multi_json'
+require 'json'
 require 'securerandom'
 require 'time'
 
@@ -64,7 +64,7 @@ def initialize(*args)
         if File.exist?(@path)
           data = json_decode(File.read(@path))
         end
-      rescue MultiJson::DecodeError => e
+      rescue JSON::ParserError => e
         logger.error "#{@path} is invalid: #{e.class} #{e.message}"
       end
 
@@ -223,23 +223,13 @@ def save
       end
 
     private
-      # Feature detect newer MultiJson API
-      if MultiJson.respond_to?(:dump)
-        def json_decode(obj)
-          MultiJson.load(obj)
-        end
 
-        def json_encode(obj)
-          MultiJson.dump(obj)
-        end
-      else
-        def json_decode(obj)
-          MultiJson.decode(obj)
-        end
+      def json_decode(obj)
+        JSON.load(obj)
+      end
 
-        def json_encode(obj)
-          MultiJson.encode(obj)
-        end
+      def json_encode(obj)
+        JSON.dump(obj)
       end
 
       def logger

sprockets.gemspec

@@ -12,7 +12,6 @@ Gem::Specification.new do |s|
   s.executables = ["sprockets"]
 
   s.add_dependency "hike", "~> 1.2"
-  s.add_dependency "multi_json", "~> 1.0"
   s.add_dependency "rack", "~> 1.0"
   s.add_dependency "tilt", ["~> 1.1", "!= 1.3.0"]