Revert logic of calculating checksum

app/models/ci/job_artifact.rb

@@ -6,7 +6,6 @@ module Ci
     belongs_to :job, class_name: "Ci::Build", foreign_key: :job_id
     before_save :set_size, if: :file_changed?
-    before_save :set_checksum, if: :file_changed?
     mount_uploader :file, JobArtifactUploader
@@ -26,10 +25,6 @@ module Ci
       self.size = file.size
     end
-    def set_checksum
-      self.checksum = file.checksum
-    end
-
     def expire_in
       expire_at - Time.now if expire_at
     end

app/uploaders/gitlab_uploader.rb

@@ -71,14 +71,6 @@ class GitlabUploader < CarrierWave::Uploader::Base
     !!model
   end
-  ##
-  # ObjectStorage::Concern extends this method for remote files
-  def use_file
-    if file_storage?
-      return yield path
-    end
-  end
-
   private
   # Designed to be overridden by child uploaders that have a dynamic path

app/uploaders/job_artifact_uploader.rb

@@ -9,12 +9,6 @@ class JobArtifactUploader < GitlabUploader
     model.size
   end
-  def checksum
-    return calc_checksum if model.checksum.nil?
-
-    model.checksum
-  end
-
   def store_dir
     dynamic_segment
   end
@@ -27,12 +21,6 @@ class JobArtifactUploader < GitlabUploader
   private
-  def calc_checksum
-    use_file do |file_path|
-      return Digest::SHA256.file(file_path).hexdigest
-    end
-  end
-
   def dynamic_segment
     creation_date = model.created_at.utc.strftime('%Y_%m_%d')

app/workers/all_queues.yml

@@ -104,5 +104,3 @@
 - update_user_activity
 - upload_checksum
 - web_hook
-
-- object_storage:update_artifact_checksum_worker
\ No newline at end of file

app/workers/concerns/object_storage_queue.rb

-# Concern for setting Sidekiq settings for the various GitLab ObjectStorage workers.
-module ObjectStorageQueue
-  extend ActiveSupport::Concern
-
-  included do
-    queue_namespace :object_storage
-  end
-end

app/workers/update_artifact_checksum_worker.rb

-class UpdateArtifactChecksumWorker
-  include ApplicationWorker
-  include ObjectStorageQueue
-
-  def perform(job_artifact_id)
-    Ci::JobArtifact.find_by(id: job_artifact_id).try do |job_artifact|
-      job_artifact.set_checksum
-      job_artifact.save!
-    end
-  end
-end

db/post_migrate/20180228121020_update_checksum_for_ci_job_artifacts.rb

-class UpdateChecksumForCiJobArtifacts < ActiveRecord::Migration
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  BATCH_SIZE = 2500
-
-  class JobArtifact < ActiveRecord::Base
-    include EachBatch
-    self.table_name = 'ci_job_artifacts'
-  end
-
-  def up
-    UpdateChecksumForCiJobArtifacts::JobArtifact
-      .where('checksum IS NULL')
-      .each_batch(of: BATCH_SIZE) do |relation|
-      ids = relation.pluck(:id).map { |id| [id] }
-
-      UpdateArtifactChecksumWorker.bulk_perform_async(ids)
-    end
-  end
-
-  def down
-    # no-op
-  end
-end

spec/workers/concerns/object_storage_queue_spec.rb

-require 'spec_helper'
-
-describe ObjectStorageQueue do
-  let(:worker) do
-    Class.new do
-      def self.name
-        'DummyWorker'
-      end
-
-      include ApplicationWorker
-      include ObjectStorageQueue
-    end
-  end
-
-  it 'sets a default object storage queue automatically' do
-    expect(worker.sidekiq_options['queue'])
-      .to eq 'object_storage:dummy'
-  end
-end