Merge branch 'bvl-free-system-namespace' into 'master'

Free `system` namespace by moving uploads into `uploads/-`

Closes #33550

See merge request !12917

app/helpers/projects_helper.rb

@@ -195,7 +195,7 @@ module ProjectsHelper
       controller.controller_name,
       controller.action_name,
       current_application_settings.cache_key,
-      'v2.4'
+      'v2.5'
     ]
 
     key << pipeline_status_cache_key(project.pipeline_status) if project.pipeline_status.has_status?

app/uploaders/gitlab_uploader.rb

@@ -16,7 +16,7 @@ class GitlabUploader < CarrierWave::Uploader::Base
   def self.base_dir
     return root_dir unless file_storage?
 
-    File.join(root_dir, 'system')
+    File.join(root_dir, '-', 'system')
   end
 
   def self.file_storage?

changelogs/unreleased/bvl-free-system-namespace.yml

+---
+title: "Move uploads from `uploads/system` to `uploads/-/system` to free up `system` as a group name"
+merge_request: 11713
+author:

config/routes/uploads.rb

 scope path: :uploads do
   # Note attachments and User/Group/Project avatars
-  get "system/:model/:mounted_as/:id/:filename",
+  get "-/system/:model/:mounted_as/:id/:filename",
       to:           "uploads#show",
       constraints:  { model: /note|user|group|project/, mounted_as: /avatar|attachment/, filename: /[^\/]+/ }
 
@@ -15,7 +15,7 @@ scope path: :uploads do
     constraints: { filename: /[^\/]+/ }
 
   # Appearance
-  get "system/:model/:mounted_as/:id/:filename",
+  get "-/system/:model/:mounted_as/:id/:filename",
       to:           "uploads#show",
       constraints:  { model: /appearance/, mounted_as: /logo|header_logo/, filename: /.+/ }
 

db/migrate/20170717074009_move_system_upload_folder.rb

+class MoveSystemUploadFolder < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+
+  def up
+    unless file_storage?
+      say 'Using object storage, no need to move.'
+      return
+    end
+
+    unless File.directory?(old_directory)
+      say "#{old_directory} doesn't exist, no need to move it."
+      return
+    end
+
+    FileUtils.mkdir_p(File.join(base_directory, '-'))
+
+    say "Moving #{old_directory} -> #{new_directory}"
+    FileUtils.mv(old_directory, new_directory)
+    FileUtils.ln_s(new_directory, old_directory)
+  end
+
+  def down
+    unless file_storage?
+      say 'Using object storage, no need to move.'
+      return
+    end
+
+    unless File.directory?(new_directory)
+      say "#{new_directory} doesn't exist, no need to move it."
+      return
+    end
+
+    if File.symlink?(old_directory)
+      say "Removing #{old_directory} -> #{new_directory} symlink"
+      FileUtils.rm(old_directory)
+    end
+
+    say "Moving #{new_directory} -> #{old_directory}"
+    FileUtils.mv(new_directory, old_directory)
+  end
+
+  def new_directory
+    File.join(base_directory, '-', 'system')
+  end
+
+  def old_directory
+    File.join(base_directory, 'system')
+  end
+
+  def base_directory
+    File.join(Rails.root, 'public', 'uploads')
+  end
+
+  def file_storage?
+    CarrierWave::Uploader::Base.storage == CarrierWave::Storage::File
+  end
+end

db/post_migrate/20170717111152_cleanup_move_system_upload_folder_symlink.rb

+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class CleanupMoveSystemUploadFolderSymlink < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    if File.symlink?(old_directory)
+      say "Removing #{old_directory} -> #{new_directory} symlink"
+      FileUtils.rm(old_directory)
+    else
+      say "Symlink #{old_directory} non existant, nothing to do."
+    end
+  end
+
+  def down
+    if File.directory?(new_directory)
+      say "Symlinking #{old_directory} -> #{new_directory}"
+      FileUtils.ln_s(new_directory, old_directory)
+    else
+      say "#{new_directory} doesn't exist, skipping."
+    end
+  end
+
+  def new_directory
+    File.join(base_directory, '-', 'system')
+  end
+
+  def old_directory
+    File.join(base_directory, 'system')
+  end
+
+  def base_directory
+    File.join(Rails.root, 'public', 'uploads')
+  end
+end

db/post_migrate/20170717150329_enqueue_migrate_system_uploads_to_new_folder.rb

+class EnqueueMigrateSystemUploadsToNewFolder < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  OLD_FOLDER = 'uploads/system/'
+  NEW_FOLDER = 'uploads/-/system/'
+
+  disable_ddl_transaction!
+
+  def up
+    BackgroundMigrationWorker.perform_async('MigrateSystemUploadsToNewFolder',
+                                            [OLD_FOLDER, NEW_FOLDER])
+  end
+
+  def down
+    BackgroundMigrationWorker.perform_async('MigrateSystemUploadsToNewFolder',
+                                            [NEW_FOLDER, OLD_FOLDER])
+  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: 20170713104829) do
+ActiveRecord::Schema.define(version: 20170717150329) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"

features/steps/groups.rb

@@ -81,7 +81,7 @@ class Spinach::Features::Groups < Spinach::FeatureSteps
 
   step 'I should see new group "Owned" avatar' do
     expect(owned_group.avatar).to be_instance_of AvatarUploader
-    expect(owned_group.avatar.url).to eq "/uploads/system/group/avatar/#{Group.find_by(name: "Owned").id}/banana_sample.gif"
+    expect(owned_group.avatar.url).to eq "/uploads/-/system/group/avatar/#{Group.find_by(name: "Owned").id}/banana_sample.gif"
   end
 
   step 'I should see the "Remove avatar" button' do

features/steps/profile/profile.rb

@@ -36,7 +36,7 @@ class Spinach::Features::Profile < Spinach::FeatureSteps
 
   step 'I should see new avatar' do
     expect(@user.avatar).to be_instance_of AvatarUploader
-    expect(@user.avatar.url).to eq "/uploads/system/user/avatar/#{@user.id}/banana_sample.gif"
+    expect(@user.avatar.url).to eq "/uploads/-/system/user/avatar/#{@user.id}/banana_sample.gif"
   end
 
   step 'I should see the "Remove avatar" button' do

features/steps/project/project.rb

@@ -38,7 +38,7 @@ class Spinach::Features::Project < Spinach::FeatureSteps
   step 'I should see new project avatar' do
     expect(@project.avatar).to be_instance_of AvatarUploader
     url = @project.avatar.url
-    expect(url).to eq "/uploads/system/project/avatar/#{@project.id}/banana_sample.gif"
+    expect(url).to eq "/uploads/-/system/project/avatar/#{@project.id}/banana_sample.gif"
   end
 
   step 'I should see the "Remove avatar" button' do

lib/gitlab/background_migration/migrate_system_uploads_to_new_folder.rb

+module Gitlab
+  module BackgroundMigration
+    class MigrateSystemUploadsToNewFolder
+      include Gitlab::Database::MigrationHelpers
+      attr_reader :old_folder, :new_folder
+
+      class Upload < ActiveRecord::Base
+        self.table_name = 'uploads'
+        include EachBatch
+      end
+
+      def perform(old_folder, new_folder)
+        replace_sql = replace_sql(uploads[:path], old_folder, new_folder)
+        affected_uploads = Upload.where(uploads[:path].matches("#{old_folder}%"))
+
+        affected_uploads.each_batch do |batch|
+          batch.update_all("path = #{replace_sql}")
+        end
+      end
+
+      def uploads
+        Arel::Table.new('uploads')
+      end
+    end
+  end
+end

lib/gitlab/path_regex.rb

@@ -49,7 +49,6 @@ module Gitlab
       sent_notifications
       services
       snippets
-      system
       teams
       u
       unicorn_test

spec/factories/uploads.rb

 FactoryGirl.define do
   factory :upload do
     model { build(:project) }
-    path { "uploads/system/project/avatar/avatar.jpg" }
+    path { "uploads/-/system/project/avatar/avatar.jpg" }
     size 100.kilobytes
     uploader "AvatarUploader"
   end

spec/features/admin/admin_appearance_spec.rb

@@ -63,11 +63,11 @@ feature 'Admin Appearance', feature: true do
   end
 
   def logo_selector
-    '//img[@src^="/uploads/system/appearance/logo"]'
+    '//img[@src^="/uploads/-/system/appearance/logo"]'
   end
 
   def header_logo_selector
-    '//img[@src^="/uploads/system/appearance/header_logo"]'
+    '//img[@src^="/uploads/-/system/appearance/header_logo"]'
   end
 
   def logo_fixture

spec/features/uploads/user_uploads_avatar_to_group_spec.rb

@@ -18,7 +18,7 @@ feature 'User uploads avatar to group', feature: true do
 
     visit group_path(group)
 
-    expect(page).to have_selector(%Q(img[src$="/uploads/system/group/avatar/#{group.id}/dk.png"]))
+    expect(page).to have_selector(%Q(img[src$="/uploads/-/system/group/avatar/#{group.id}/dk.png"]))
 
     # Cheating here to verify something that isn't user-facing, but is important
     expect(group.reload.avatar.file).to exist

spec/features/uploads/user_uploads_avatar_to_profile_spec.rb

@@ -16,7 +16,7 @@ feature 'User uploads avatar to profile', feature: true do
 
     visit user_path(user)
 
-    expect(page).to have_selector(%Q(img[src$="/uploads/system/user/avatar/#{user.id}/dk.png"]))
+    expect(page).to have_selector(%Q(img[src$="/uploads/-/system/user/avatar/#{user.id}/dk.png"]))
 
     # Cheating here to verify something that isn't user-facing, but is important
     expect(user.reload.avatar.file).to exist

spec/helpers/application_helper_spec.rb

@@ -59,13 +59,13 @@ describe ApplicationHelper do
   describe 'project_icon' do
     it 'returns an url for the avatar' do
       project = create(:empty_project, avatar: File.open(uploaded_image_temp_path))
-      avatar_url = "/uploads/system/project/avatar/#{project.id}/banana_sample.gif"
+      avatar_url = "/uploads/-/system/project/avatar/#{project.id}/banana_sample.gif"
 
       expect(helper.project_icon(project.full_path).to_s)
         .to eq "<img src=\"#{avatar_url}\" alt=\"Banana sample\" />"
 
       allow(ActionController::Base).to receive(:asset_host).and_return(gitlab_host)
-      avatar_url = "#{gitlab_host}/uploads/system/project/avatar/#{project.id}/banana_sample.gif"
+      avatar_url = "#{gitlab_host}/uploads/-/system/project/avatar/#{project.id}/banana_sample.gif"
 
       expect(helper.project_icon(project.full_path).to_s)
         .to eq "<img src=\"#{avatar_url}\" alt=\"Banana sample\" />"
@@ -88,7 +88,7 @@ describe ApplicationHelper do
       context 'when there is a matching user' do
         it 'returns a relative URL for the avatar' do
           expect(helper.avatar_icon(user.email).to_s)
-            .to eq("/uploads/system/user/avatar/#{user.id}/banana_sample.gif")
+            .to eq("/uploads/-/system/user/avatar/#{user.id}/banana_sample.gif")
         end
 
         context 'when an asset_host is set in the config' do
@@ -100,14 +100,14 @@ describe ApplicationHelper do
 
           it 'returns an absolute URL on that asset host' do
             expect(helper.avatar_icon(user.email, only_path: false).to_s)
-              .to eq("#{asset_host}/uploads/system/user/avatar/#{user.id}/banana_sample.gif")
+              .to eq("#{asset_host}/uploads/-/system/user/avatar/#{user.id}/banana_sample.gif")
           end
         end
 
         context 'when only_path is set to false' do
           it 'returns an absolute URL for the avatar' do
             expect(helper.avatar_icon(user.email, only_path: false).to_s)
-              .to eq("#{gitlab_host}/uploads/system/user/avatar/#{user.id}/banana_sample.gif")
+              .to eq("#{gitlab_host}/uploads/-/system/user/avatar/#{user.id}/banana_sample.gif")
           end
         end
 
@@ -120,7 +120,7 @@ describe ApplicationHelper do
 
           it 'returns a relative URL with the correct prefix' do
             expect(helper.avatar_icon(user.email).to_s)
-              .to eq("/gitlab/uploads/system/user/avatar/#{user.id}/banana_sample.gif")
+              .to eq("/gitlab/uploads/-/system/user/avatar/#{user.id}/banana_sample.gif")
           end
         end
       end
@@ -138,14 +138,14 @@ describe ApplicationHelper do
       context 'when only_path is true' do
         it 'returns a relative URL for the avatar' do
           expect(helper.avatar_icon(user, only_path: true).to_s)
-            .to eq("/uploads/system/user/avatar/#{user.id}/banana_sample.gif")
+            .to eq("/uploads/-/system/user/avatar/#{user.id}/banana_sample.gif")
         end
       end
 
       context 'when only_path is false' do
         it 'returns an absolute URL for the avatar' do
           expect(helper.avatar_icon(user, only_path: false).to_s)
-            .to eq("#{gitlab_host}/uploads/system/user/avatar/#{user.id}/banana_sample.gif")
+            .to eq("#{gitlab_host}/uploads/-/system/user/avatar/#{user.id}/banana_sample.gif")
         end
       end
     end

spec/helpers/emails_helper_spec.rb

@@ -52,7 +52,7 @@ describe EmailsHelper do
         )
 
         expect(header_logo).to eq(
-          %{<img style="height: 50px" src="/uploads/system/appearance/header_logo/#{appearance.id}/dk.png" alt="Dk" />}
+          %{<img style="height: 50px" src="/uploads/-/system/appearance/header_logo/#{appearance.id}/dk.png" alt="Dk" />}
         )
       end
     end

spec/helpers/groups_helper_spec.rb

@@ -11,7 +11,7 @@ describe GroupsHelper do
       group.avatar = fixture_file_upload(avatar_file_path)
       group.save!
       expect(group_icon(group.path).to_s)
-        .to match("/uploads/system/group/avatar/#{group.id}/banana_sample.gif")
+        .to match("/uploads/-/system/group/avatar/#{group.id}/banana_sample.gif")
     end
 
     it 'gives default avatar_icon when no avatar is present' do

spec/helpers/page_layout_helper_spec.rb

@@ -60,7 +60,7 @@ describe PageLayoutHelper do
     %w(project user group).each do |type|
       context "with @#{type} assigned" do
         it "uses #{type.titlecase} avatar if available" do
-          object = double(avatar_url: 'http://example.com/uploads/system/avatar.png')
+          object = double(avatar_url: 'http://example.com/uploads/-/system/avatar.png')
           assign(type, object)
 
           expect(helper.page_image).to eq object.avatar_url

spec/javascripts/vue_shared/components/commit_spec.js

@@ -22,7 +22,7 @@ describe('Commit component', () => {
         shortSha: 'b7836edd',
         title: 'Commit message',
         author: {
-          avatar_url: 'https://gitlab.com/uploads/system/user/avatar/300478/avatar.png',
+          avatar_url: 'https://gitlab.com/uploads/-/system/user/avatar/300478/avatar.png',
           web_url: 'https://gitlab.com/jschatz1',
           path: '/jschatz1',
           username: 'jschatz1',
@@ -45,7 +45,7 @@ describe('Commit component', () => {
         shortSha: 'b7836edd',
         title: 'Commit message',
         author: {
-          avatar_url: 'https://gitlab.com/uploads/system/user/avatar/300478/avatar.png',
+          avatar_url: 'https://gitlab.com/uploads/-/system/user/avatar/300478/avatar.png',
           web_url: 'https://gitlab.com/jschatz1',
           path: '/jschatz1',
           username: 'jschatz1',

spec/lib/gitlab/background_migration/migrate_system_uploads_to_new_folder_spec.rb

+require 'spec_helper'
+
+describe Gitlab::BackgroundMigration::MigrateSystemUploadsToNewFolder do
+  let(:migration) { described_class.new }
+
+  before do
+    allow(migration).to receive(:logger).and_return(Logger.new(nil))
+  end
+
+  describe '#perform' do
+    it 'renames the path of system-uploads', truncate: true do
+      upload = create(:upload, model: create(:empty_project), path: 'uploads/system/project/avatar.jpg')
+
+      migration.perform('uploads/system/', 'uploads/-/system/')
+
+      expect(upload.reload.path).to eq('uploads/-/system/project/avatar.jpg')
+    end
+  end
+end

spec/migrations/cleanup_move_system_upload_folder_symlink_spec.rb

+require 'spec_helper'
+require Rails.root.join("db", "post_migrate", "20170717111152_cleanup_move_system_upload_folder_symlink.rb")
+
+describe CleanupMoveSystemUploadFolderSymlink do
+  let(:migration) { described_class.new }
+  let(:test_base) { File.join(Rails.root, 'tmp', 'tests', 'move-system-upload-folder') }
+  let(:test_folder) { File.join(test_base, '-', 'system') }
+
+  before do
+    allow(migration).to receive(:base_directory).and_return(test_base)
+    FileUtils.rm_rf(test_base)
+    FileUtils.mkdir_p(test_folder)
+    allow(migration).to receive(:say)
+  end
+
+  describe '#up' do
+    before do
+      FileUtils.ln_s(test_folder, File.join(test_base, 'system'))
+    end
+
+    it 'removes the symlink' do
+      migration.up
+
+      expect(File.exist?(File.join(test_base, 'system'))).to be_falsey
+    end
+  end
+
+  describe '#down' do
+    it 'creates the symlink' do
+      migration.down
+
+      expect(File.symlink?(File.join(test_base, 'system'))).to be_truthy
+    end
+  end
+end

spec/migrations/move_system_upload_folder_spec.rb

+require 'spec_helper'
+require Rails.root.join("db", "migrate", "20170717074009_move_system_upload_folder.rb")
+
+describe MoveSystemUploadFolder do
+  let(:migration) { described_class.new }
+  let(:test_base) { File.join(Rails.root, 'tmp', 'tests', 'move-system-upload-folder') }
+
+  before do
+    allow(migration).to receive(:base_directory).and_return(test_base)
+    FileUtils.rm_rf(test_base)
+    FileUtils.mkdir_p(test_base)
+    allow(migration).to receive(:say)
+  end
+
+  describe '#up' do
+    let(:test_folder) { File.join(test_base, 'system') }
+    let(:test_file) { File.join(test_folder, 'file') }
+
+    before do
+      FileUtils.mkdir_p(test_folder)
+      FileUtils.touch(test_file)
+    end
+
+    it 'moves the related folder' do
+      migration.up
+
+      expect(File.exist?(File.join(test_base, '-', 'system', 'file'))).to be_truthy
+    end
+
+    it 'creates a symlink linking making the new folder available on the old path' do
+      migration.up
+
+      expect(File.symlink?(File.join(test_base, 'system'))).to be_truthy
+      expect(File.exist?(File.join(test_base, 'system', 'file'))).to be_truthy
+    end
+  end
+
+  describe '#down' do
+    let(:test_folder) { File.join(test_base, '-', 'system') }
+    let(:test_file) { File.join(test_folder, 'file') }
+
+    before do
+      FileUtils.mkdir_p(test_folder)
+      FileUtils.touch(test_file)
+    end
+
+    it 'moves the system folder back to the old location' do
+      migration.down
+
+      expect(File.exist?(File.join(test_base, 'system', 'file'))).to be_truthy
+    end
+
+    it 'removes the symlink if it existed' do
+      FileUtils.ln_s(test_folder, File.join(test_base, 'system'))
+
+      migration.down
+
+      expect(File.directory?(File.join(test_base, 'system'))).to be_truthy
+      expect(File.symlink?(File.join(test_base, 'system'))).to be_falsey
+    end
+  end
+end

spec/models/group_spec.rb

@@ -189,7 +189,7 @@ describe Group, models: true do
     let!(:group) { create(:group, :access_requestable, :with_avatar) }
     let(:user) { create(:user) }
     let(:gitlab_host) { "http://#{Gitlab.config.gitlab.host}" }
-    let(:avatar_path) { "/uploads/system/group/avatar/#{group.id}/dk.png" }
+    let(:avatar_path) { "/uploads/-/system/group/avatar/#{group.id}/dk.png" }
 
     context 'when avatar file is uploaded' do
       before do

spec/models/namespace_spec.rb

@@ -44,7 +44,7 @@ describe Namespace, models: true do
       end
 
       context "is case insensitive" do
-        let(:group) { build(:group, path: "System") }
+        let(:group) { build(:group, path: "Groups") }
 
         it { expect(group).not_to be_valid }
       end

spec/models/project_spec.rb

@@ -807,7 +807,7 @@ describe Project, models: true do
 
     context 'when avatar file is uploaded' do
       let(:project) { create(:empty_project, :with_avatar) }
-      let(:avatar_path) { "/uploads/system/project/avatar/#{project.id}/dk.png" }
+      let(:avatar_path) { "/uploads/-/system/project/avatar/#{project.id}/dk.png" }
       let(:gitlab_host) { "http://#{Gitlab.config.gitlab.host}" }
 
       it 'shows correct url' do

spec/models/user_spec.rb

@@ -1028,7 +1028,7 @@ describe User, models: true do
 
     context 'when avatar file is uploaded' do
       let(:gitlab_host) { "http://#{Gitlab.config.gitlab.host}" }
-      let(:avatar_path) { "/uploads/system/user/avatar/#{user.id}/dk.png" }
+      let(:avatar_path) { "/uploads/-/system/user/avatar/#{user.id}/dk.png" }
 
       it 'shows correct avatar url' do
         expect(user.avatar_url).to eq(avatar_path)

spec/requests/api/projects_spec.rb

@@ -442,7 +442,7 @@ describe API::Projects do
       post api('/projects', user), project
 
       project_id = json_response['id']
-      expect(json_response['avatar_url']).to eq("http://localhost/uploads/system/project/avatar/#{project_id}/banana_sample.gif")
+      expect(json_response['avatar_url']).to eq("http://localhost/uploads/-/system/project/avatar/#{project_id}/banana_sample.gif")
     end
 
     it 'sets a project as allowing merge even if build fails' do

spec/requests/openid_connect_spec.rb

@@ -79,7 +79,7 @@ describe 'OpenID Connect requests' do
           'email_verified' => true,
           'website'        => 'https://example.com',
           'profile'        => 'http://localhost/alice',
-          'picture'        => "http://localhost/uploads/system/user/avatar/#{user.id}/dk.png"
+          'picture'        => "http://localhost/uploads/-/system/user/avatar/#{user.id}/dk.png"
         })
       end
     end

spec/services/projects/participants_service_spec.rb

@@ -13,7 +13,7 @@ describe Projects::ParticipantsService, services: true do
         groups = participants.groups
 
         expect(groups.size).to eq 1
-        expect(groups.first[:avatar_url]).to eq("/uploads/system/group/avatar/#{group.id}/dk.png")
+        expect(groups.first[:avatar_url]).to eq("/uploads/-/system/group/avatar/#{group.id}/dk.png")
       end
 
       it 'should return an url for the avatar with relative url' do
@@ -24,7 +24,7 @@ describe Projects::ParticipantsService, services: true do
         groups = participants.groups
 
         expect(groups.size).to eq 1
-        expect(groups.first[:avatar_url]).to eq("/gitlab/uploads/system/group/avatar/#{group.id}/dk.png")
+        expect(groups.first[:avatar_url]).to eq("/gitlab/uploads/-/system/group/avatar/#{group.id}/dk.png")
       end
     end
   end

spec/uploaders/attachment_uploader_spec.rb

@@ -5,7 +5,7 @@ describe AttachmentUploader do
 
   describe "#store_dir" do
     it "stores in the system dir" do
-      expect(uploader.store_dir).to start_with("uploads/system/user")
+      expect(uploader.store_dir).to start_with("uploads/-/system/user")
     end
 
     it "uses the old path when using object storage" do

spec/uploaders/avatar_uploader_spec.rb

@@ -5,7 +5,7 @@ describe AvatarUploader do
 
   describe "#store_dir" do
     it "stores in the system dir" do
-      expect(uploader.store_dir).to start_with("uploads/system/user")
+      expect(uploader.store_dir).to start_with("uploads/-/system/user")
     end
 
     it "uses the old path when using object storage" do