Use grpc 1.4.5

Gemfile.lock

@@ -356,7 +356,7 @@ GEM
       activesupport
       grape (>= 0.16.0)
       rake
-    grpc (1.4.0)
+    grpc (1.4.5)
       google-protobuf (~> 3.1)
       googleauth (~> 0.5.1)
     haml (4.0.7)

lib/gitlab/gitaly_client/blob_service.rb

@@ -13,10 +13,17 @@ module Gitlab
         )
         response = GitalyClient.call(@gitaly_repo.storage_name, :blob_service, :get_blob, request)
 
-        blob = response.first
-        return unless blob.oid.present?
+        data = ''
+        blob = nil
+        response.each do |msg|
+          if blob.nil?
+            blob = msg
+          end
+
+          data << msg.data
+        end
 
-        data = response.reduce(blob.data.dup) { |memo, msg| memo << msg.data.dup }
+        return nil if blob.oid.blank?
 
         Gitlab::Git::Blob.new(
           id: blob.oid,

lib/gitlab/gitaly_client/commit_service.rb

@@ -60,15 +60,21 @@ module Gitlab
         )
 
         response = GitalyClient.call(@repository.storage, :commit_service, :tree_entry, request)
-        entry = response.first
-        return unless entry.oid.present?
 
-        if entry.type == :BLOB
-          rest_of_data = response.reduce("") { |memo, msg| memo << msg.data }
-          entry.data += rest_of_data
+        entry = nil
+        data = ''
+        response.each do |msg|
+          if entry.nil?
+            entry = msg
+
+            break unless entry.type == :BLOB
+          end
+
+          data << msg.data
         end
+        entry.data = data
 
-        entry
+        entry unless entry.oid.blank?
       end
 
       def tree_entries(repository, revision, path)