Just save the size in total rather than individual files

Feedback:
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4964#note_12741046

app/models/ci/build.rb

@@ -5,7 +5,6 @@ module Ci
     belongs_to :erased_by, class_name: 'User'
 
     serialize :options
-    serialize :artifacts_sizes, JSON
 
     validates :coverage, numericality: true, allow_blank: true
     validates_presence_of :ref
@@ -329,19 +328,13 @@ module Ci
       artifacts? && artifacts_metadata.exists?
     end
 
-    def artifacts_metadata_sizes
-      return unless artifacts_metadata?
-
-      entries = new_artifacts_metadata('', recursive: true).find_entries!
-
-      entries.inject({}) do |result, (path, metadata)|
-        result[path] = metadata[:size] if metadata[:size]
-        result
-      end
-    end
-
     def artifacts_metadata_entry(path, **options)
-      new_artifacts_metadata(path, **options).to_entry
+      metadata = Gitlab::Ci::Build::Artifacts::Metadata.new(
+        artifacts_metadata.path,
+        path,
+        **options)
+
+      metadata.to_entry
     end
 
     def erase_artifacts!
@@ -387,13 +380,6 @@ module Ci
 
     private
 
-    def new_artifacts_metadata(path, **options)
-      Gitlab::Ci::Build::Artifacts::Metadata.new(
-        artifacts_metadata.path,
-        path,
-        **options)
-    end
-
     def erase_trace!
       self.trace = nil
     end

db/migrate/20160628085157_add_artifacts_size_to_ci_builds.rb

@@ -1,11 +1,10 @@
 # See http://doc.gitlab.com/ce/development/migration_style_guide.html
 # for more information on how to write migrations for GitLab.
 
-class AddArtifactsSizesToCiBuilds < ActiveRecord::Migration
+class AddArtifactsSizeToCiBuilds < ActiveRecord::Migration
   include Gitlab::Database::MigrationHelpers
 
   def change
-    # Or :json if under PostgreSQL?
-    add_column(:ci_builds, :artifacts_sizes, :text)
+    add_column(:ci_builds, :artifacts_size, :integer)
   end
 end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20160620115026) do
+ActiveRecord::Schema.define(version: 20160628085157) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -163,6 +163,7 @@ ActiveRecord::Schema.define(version: 20160620115026) do
     t.datetime "erased_at"
     t.string   "environment"
     t.datetime "artifacts_expire_at"
+    t.integer  "artifacts_size"
   end
 
   add_index "ci_builds", ["commit_id", "stage_idx", "created_at"], name: "index_ci_builds_on_commit_id_and_stage_idx_and_created_at", using: :btree

lib/ci/api/builds.rb

@@ -147,7 +147,7 @@ module Ci
           build.artifacts_file = artifacts
           build.artifacts_metadata = metadata
           build.artifacts_expire_in = params['expire_in']
-          build.artifacts_sizes = build.artifacts_metadata_sizes
+          build.artifacts_size = artifacts.size
 
           if build.save
             present(build, with: Entities::BuildDetails)

spec/requests/ci/api/builds_spec.rb

@@ -344,14 +344,11 @@ describe Ci::API::API do
 
           context 'should post artifacts file and metadata file' do
             let!(:artifacts) { file_upload }
-            let!(:metadata) do
-              fixture_file_upload(
-                Rails.root + 'spec/fixtures/ci_build_artifacts_metadata.gz')
-            end
+            let!(:metadata) { file_upload2 }
 
             let(:stored_artifacts_file) { build.reload.artifacts_file.file }
             let(:stored_metadata_file) { build.reload.artifacts_metadata.file }
-            let(:stored_artifacts_sizes) { build.reload.artifacts_sizes }
+            let(:stored_artifacts_size) { build.reload.artifacts_size }
 
             before do
               post(post_url, post_data, headers_with_token)
@@ -369,12 +366,7 @@ describe Ci::API::API do
                 expect(response).to have_http_status(201)
                 expect(stored_artifacts_file.original_filename).to eq(artifacts.original_filename)
                 expect(stored_metadata_file.original_filename).to eq(metadata.original_filename)
-                expect(stored_artifacts_sizes).to eq(
-                  'ci_artifacts.txt' => 27,
-                  'other_artifacts_0.1.2/another-subdirectory/banana_sample.gif' => 71759,
-                  'other_artifacts_0.1.2/doc_sample.txt' => 1314,
-                  'rails_sample.jpg' => 35255,
-                  'tests_encoding/utf8 test dir ✓/regular_file_2' => 7)
+                expect(stored_artifacts_size).to eq(71759)
               end
             end