Merge branch 'lazily-load-blob-content' into 'master'

Lazily load LiteBlob#data

See merge request !25

lib/elasticsearch/git/lite_blob.rb

@@ -7,18 +7,21 @@ module Elasticsearch
       include Linguist::BlobHelper
       include Elasticsearch::Git::EncoderHelper
-      attr_accessor :id, :name, :path, :data, :size, :mode, :commit_id
+      attr_accessor :id, :name, :path, :size, :mode, :commit_id
+      attr_writer :data
       def initialize(repo, raw_blob_hash)
         @id   = raw_blob_hash[:oid]
-
-        blob  = repo.lookup(@id)
+        @blob  = repo.lookup(@id)
         @mode = raw_blob_hash[:mode].to_s(8)
-        @size = blob.size
+        @size = @blob.size
         @path = encode!(raw_blob_hash[:path])
         @name = @path.split('/').last
-        @data = encode!(blob.content)
+      end
+
+      def data
+        @data ||= encode!(@blob.content)
       end
     end
   end