Move helpers back to original directory

93 files changed, 3152 insertions, 3308 deletions

diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 54d15b7d7c1..f029abc5013 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,13 +1,9 @@
 require 'gon'
 
 class ApplicationController < ActionController::Base
-  def self.railtie_helpers_paths
-    "app/helpers/gitlab"
-  end
-
   include Gitlab::CurrentSettings
-  include Gitlab::GitlabRoutingHelper
-  include Gitlab::PageLayoutHelper
+  include GitlabRoutingHelper
+  include PageLayoutHelper
 
   PER_PAGE = 20
 
diff --git a/app/controllers/oauth/applications_controller.rb b/app/controllers/oauth/applications_controller.rb
index 4e007d2a4d0..dc22101cd5e 100644
--- a/app/controllers/oauth/applications_controller.rb
+++ b/app/controllers/oauth/applications_controller.rb
@@ -1,7 +1,7 @@
 class Oauth::ApplicationsController < Doorkeeper::ApplicationsController
   include Gitlab::CurrentSettings
-  include Gitlab::PageLayoutHelper
-  
+  include PageLayoutHelper
+
   before_action :verify_user_oauth_applications_enabled
   before_action :authenticate_user!
 
diff --git a/app/controllers/oauth/authorized_applications_controller.rb b/app/controllers/oauth/authorized_applications_controller.rb
index 08d94408fc8..4193ac11399 100644
--- a/app/controllers/oauth/authorized_applications_controller.rb
+++ b/app/controllers/oauth/authorized_applications_controller.rb
@@ -1,5 +1,5 @@
 class Oauth::AuthorizedApplicationsController < Doorkeeper::AuthorizedApplicationsController
-  include Gitlab::PageLayoutHelper
+  include PageLayoutHelper
 
   layout 'profile'
 
diff --git a/app/controllers/projects/network_controller.rb b/app/controllers/projects/network_controller.rb
index b70e12365da..b181c47baec 100644
--- a/app/controllers/projects/network_controller.rb
+++ b/app/controllers/projects/network_controller.rb
@@ -1,6 +1,6 @@
 class Projects::NetworkController < Projects::ApplicationController
   include ExtractsPath
-  include Gitlab::ApplicationHelper
+  include ApplicationHelper
 
   before_action :require_non_empty_project
   before_action :assign_ref_vars
diff --git a/app/controllers/projects/refs_controller.rb b/app/controllers/projects/refs_controller.rb
index a9081a5ae16..6080c849c8d 100644
--- a/app/controllers/projects/refs_controller.rb
+++ b/app/controllers/projects/refs_controller.rb
@@ -1,6 +1,6 @@
 class Projects::RefsController < Projects::ApplicationController
   include ExtractsPath
-  include Gitlab::TreeHelper
+  include TreeHelper
 
   before_action :require_non_empty_project
   before_action :assign_ref_vars
diff --git a/app/controllers/projects/wikis_controller.rb b/app/controllers/projects/wikis_controller.rb
index 870ff035b03..b2bf9fa05ea 100644
--- a/app/controllers/projects/wikis_controller.rb
+++ b/app/controllers/projects/wikis_controller.rb
@@ -5,7 +5,7 @@ class Projects::WikisController < Projects::ApplicationController
   before_action :authorize_create_wiki!, only: [:edit, :create, :history]
   before_action :authorize_admin_wiki!, only: :destroy
   before_action :load_project_wiki
-  include Gitlab::WikiHelper
+  #include WikiHelper
 
   def pages
     @wiki_pages = Kaminari.paginate_array(@project_wiki.pages).page(params[:page]).per(PER_PAGE)
diff --git a/app/controllers/search_controller.rb b/app/controllers/search_controller.rb
index 63d336b2bd5..eb0408a95e5 100644
--- a/app/controllers/search_controller.rb
+++ b/app/controllers/search_controller.rb
@@ -1,5 +1,5 @@
 class SearchController < ApplicationController
-  include Gitlab::SearchHelper
+  include SearchHelper
 
   layout 'search'
 
diff --git a/app/helpers/appearances_helper.rb b/app/helpers/appearances_helper.rb
new file mode 100644
index 00000000000..14df8d4cbd7
--- /dev/null
+++ b/app/helpers/appearances_helper.rb
@@ -0,0 +1,21 @@
+module AppearancesHelper
+  def brand_item
+    nil
+  end
+
+  def brand_title
+    'GitLab Community Edition'
+  end
+
+  def brand_image
+    nil
+  end
+
+  def brand_text
+    nil
+  end
+
+  def brand_header_logo
+    image_tag 'logo.svg'
+  end
+end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
new file mode 100644
index 00000000000..a803b66c502
--- /dev/null
+++ b/app/helpers/application_helper.rb
@@ -0,0 +1,315 @@
+require 'digest/md5'
+require 'uri'
+
+module ApplicationHelper
+  # Check if a particular controller is the current one
+  #
+  # args - One or more controller names to check
+  #
+  # Examples
+  #
+  #   # On TreeController
+  #   current_controller?(:tree)           # => true
+  #   current_controller?(:commits)        # => false
+  #   current_controller?(:commits, :tree) # => true
+  def current_controller?(*args)
+    args.any? { |v| v.to_s.downcase == controller.controller_name }
+  end
+
+  # Check if a particular action is the current one
+  #
+  # args - One or more action names to check
+  #
+  # Examples
+  #
+  #   # On Projects#new
+  #   current_action?(:new)           # => true
+  #   current_action?(:create)        # => false
+  #   current_action?(:new, :create)  # => true
+  def current_action?(*args)
+    args.any? { |v| v.to_s.downcase == action_name }
+  end
+
+  def project_icon(project_id, options = {})
+    project =
+      if project_id.is_a?(Project)
+        project = project_id
+      else
+        Project.find_with_namespace(project_id)
+      end
+
+    if project.avatar_url
+      image_tag project.avatar_url, options
+    else # generated icon
+      project_identicon(project, options)
+    end
+  end
+
+  def project_identicon(project, options = {})
+    allowed_colors = {
+      red: 'FFEBEE',
+      purple: 'F3E5F5',
+      indigo: 'E8EAF6',
+      blue: 'E3F2FD',
+      teal: 'E0F2F1',
+      orange: 'FBE9E7',
+      gray: 'EEEEEE'
+    }
+
+    options[:class] ||= ''
+    options[:class] << ' identicon'
+    bg_key = project.id % 7
+    style = "background-color: ##{ allowed_colors.values[bg_key] }; color: #555"
+
+    content_tag(:div, class: options[:class], style: style) do
+      project.name[0, 1].upcase
+    end
+  end
+
+  def avatar_icon(user_email = '', size = nil)
+    user = User.find_by(email: user_email)
+
+    if user
+      user.avatar_url(size) || default_avatar
+    else
+      gravatar_icon(user_email, size)
+    end
+  end
+
+  def gravatar_icon(user_email = '', size = nil)
+    GravatarService.new.execute(user_email, size) ||
+      default_avatar
+  end
+
+  def default_avatar
+    image_path('no_avatar.png')
+  end
+
+  def last_commit(project)
+    if project.repo_exists?
+      time_ago_with_tooltip(project.repository.commit.committed_date)
+    else
+      'Never'
+    end
+  rescue
+    'Never'
+  end
+
+  def grouped_options_refs
+    repository = @project.repository
+
+    options = [
+      ['Branches', repository.branch_names],
+      ['Tags', VersionSorter.rsort(repository.tag_names)]
+    ]
+
+    # If reference is commit id - we should add it to branch/tag selectbox
+    if(@ref && !options.flatten.include?(@ref) &&
+       @ref =~ /\A[0-9a-zA-Z]{6,52}\z/)
+      options << ['Commit', [@ref]]
+    end
+
+    grouped_options_for_select(options, @ref || @project.default_branch)
+  end
+
+  def emoji_autocomplete_source
+    # should be an array of strings
+    # so to_s can be called, because it is sufficient and to_json is too slow
+    Emoji.names.to_s
+  end
+
+  # Define whenever show last push event
+  # with suggestion to create MR
+  def show_last_push_widget?(event)
+    # Skip if event is not about added or modified non-master branch
+    return false unless event && event.last_push_to_non_root? && !event.rm_ref?
+
+    project = event.project
+
+    # Skip if project repo is empty or MR disabled
+    return false unless project && !project.empty_repo? && project.merge_requests_enabled
+
+    # Skip if user already created appropriate MR
+    return false if project.merge_requests.where(source_branch: event.branch_name).opened.any?
+
+    # Skip if user removed branch right after that
+    return false unless project.repository.branch_names.include?(event.branch_name)
+
+    true
+  end
+
+  def hexdigest(string)
+    Digest::SHA1.hexdigest string
+  end
+
+  def simple_sanitize(str)
+    sanitize(str, tags: %w(a span))
+  end
+
+  def body_data_page
+    path = controller.controller_path.split('/')
+    namespace = path.first if path.second
+
+    [namespace, controller.controller_name, controller.action_name].compact.join(':')
+  end
+
+  # shortcut for gitlab config
+  def gitlab_config
+    Gitlab.config.gitlab
+  end
+
+  # shortcut for gitlab extra config
+  def extra_config
+    Gitlab.config.extra
+  end
+
+  def search_placeholder
+    if @project && @project.persisted?
+      'Search in this project'
+    elsif @snippet || @snippets || @show_snippets
+      'Search snippets'
+    elsif @group && @group.persisted?
+      'Search in this group'
+    else
+      'Search'
+    end
+  end
+
+  def broadcast_message
+    BroadcastMessage.current
+  end
+
+  # Render a `time` element with Javascript-based relative date and tooltip
+  #
+  # time       - Time object
+  # placement  - Tooltip placement String (default: "top")
+  # html_class - Custom class for `time` element (default: "time_ago")
+  # skip_js    - When true, exclude the `script` tag (default: false)
+  #
+  # By default also includes a `script` element with Javascript necessary to
+  # initialize the `timeago` jQuery extension. If this method is called many
+  # times, for example rendering hundreds of commits, it's advisable to disable
+  # this behavior using the `skip_js` argument and re-initializing `timeago`
+  # manually once all of the elements have been rendered.
+  #
+  # A `js-timeago` class is always added to the element, even when a custom
+  # `html_class` argument is provided.
+  #
+  # Returns an HTML-safe String
+  def time_ago_with_tooltip(time, placement: 'top', html_class: 'time_ago', skip_js: false)
+    element = content_tag :time, time.to_s,
+      class: "#{html_class} js-timeago",
+      datetime: time.getutc.iso8601,
+      title: time.in_time_zone.stamp('Aug 21, 2011 9:23pm'),
+      data: { toggle: 'tooltip', placement: placement }
+
+    element += javascript_tag "$('.js-timeago').timeago()" unless skip_js
+
+    element
+  end
+
+  def render_markup(file_name, file_content)
+    if gitlab_markdown?(file_name)
+      Haml::Helpers.preserve(markdown(file_content))
+    elsif asciidoc?(file_name)
+      asciidoc(file_content)
+    elsif plain?(file_name)
+      content_tag :pre, class: 'plain-readme' do
+        file_content
+      end
+    else
+      GitHub::Markup.render(file_name, file_content).
+        force_encoding(file_content.encoding).html_safe
+    end
+  rescue RuntimeError
+    simple_format(file_content)
+  end
+
+  def plain?(filename)
+    Gitlab::MarkupHelper.plain?(filename)
+  end
+
+  def markup?(filename)
+    Gitlab::MarkupHelper.markup?(filename)
+  end
+
+  def gitlab_markdown?(filename)
+    Gitlab::MarkupHelper.gitlab_markdown?(filename)
+  end
+
+  def asciidoc?(filename)
+    Gitlab::MarkupHelper.asciidoc?(filename)
+  end
+
+  def promo_host
+    'about.gitlab.com'
+  end
+
+  def promo_url
+    'https://' + promo_host
+  end
+
+  def page_filter_path(options = {})
+    without = options.delete(:without)
+
+    exist_opts = {
+      state: params[:state],
+      scope: params[:scope],
+      label_name: params[:label_name],
+      milestone_id: params[:milestone_id],
+      assignee_id: params[:assignee_id],
+      author_id: params[:author_id],
+      sort: params[:sort],
+    }
+
+    options = exist_opts.merge(options)
+
+    if without.present?
+      without.each do |key|
+        options.delete(key)
+      end
+    end
+
+    path = request.path
+    path << "?#{options.to_param}"
+    path
+  end
+
+  def outdated_browser?
+    browser.ie? && browser.version.to_i < 10
+  end
+
+  def path_to_key(key, admin = false)
+    if admin
+      admin_user_key_path(@user, key)
+    else
+      profile_key_path(key)
+    end
+  end
+
+  def state_filters_text_for(entity, project)
+    titles = {
+      opened: "Open"
+    }
+
+    entity_title = titles[entity] || entity.to_s.humanize
+
+    count =
+      if project.nil?
+        nil
+      elsif current_controller?(:issues)
+        project.issues.send(entity).count
+      elsif current_controller?(:merge_requests)
+        project.merge_requests.send(entity).count
+      end
+
+    html = content_tag :span, entity_title
+
+    if count.present?
+      html += " "
+      html += content_tag :span, number_with_delimiter(count), class: 'badge'
+    end
+
+    html.html_safe
+  end
+end
diff --git a/app/helpers/application_settings_helper.rb b/app/helpers/application_settings_helper.rb
new file mode 100644
index 00000000000..7d6b58ee21a
--- /dev/null
+++ b/app/helpers/application_settings_helper.rb
@@ -0,0 +1,59 @@
+module ApplicationSettingsHelper
+  def gravatar_enabled?
+    current_application_settings.gravatar_enabled?
+  end
+
+  def twitter_sharing_enabled?
+    current_application_settings.twitter_sharing_enabled?
+  end
+
+  def signup_enabled?
+    current_application_settings.signup_enabled?
+  end
+
+  def signin_enabled?
+    current_application_settings.signin_enabled?
+  end
+
+  def extra_sign_in_text
+    current_application_settings.sign_in_text
+  end
+
+  def user_oauth_applications?
+    current_application_settings.user_oauth_applications
+  end
+
+  # Return a group of checkboxes that use Bootstrap's button plugin for a
+  # toggle button effect.
+  def restricted_level_checkboxes(help_block_id)
+    Gitlab::VisibilityLevel.options.map do |name, level|
+      checked = restricted_visibility_levels(true).include?(level)
+      css_class = 'btn'
+      css_class += ' active' if checked
+      checkbox_name = 'application_setting[restricted_visibility_levels][]'
+
+      label_tag(checkbox_name, class: css_class) do
+        check_box_tag(checkbox_name, level, checked,
+                      autocomplete: 'off',
+                      'aria-describedby' => help_block_id) + name
+      end
+    end
+  end
+
+  # Return a group of checkboxes that use Bootstrap's button plugin for a
+  # toggle button effect.
+  def import_sources_checkboxes(help_block_id)
+    Gitlab::ImportSources.options.map do |name, source|
+      checked = current_application_settings.import_sources.include?(source)
+      css_class = 'btn'
+      css_class += ' active' if checked
+      checkbox_name = 'application_setting[import_sources][]'
+
+      label_tag(checkbox_name, class: css_class) do
+        check_box_tag(checkbox_name, source, checked,
+                      autocomplete: 'off',
+                      'aria-describedby' => help_block_id) + name
+      end
+    end
+  end
+end
diff --git a/app/helpers/auth_helper.rb b/app/helpers/auth_helper.rb
new file mode 100644
index 00000000000..d9502181c4f
--- /dev/null
+++ b/app/helpers/auth_helper.rb
@@ -0,0 +1,54 @@
+module AuthHelper
+  PROVIDERS_WITH_ICONS = %w(twitter github gitlab bitbucket google_oauth2).freeze
+  FORM_BASED_PROVIDERS = [/\Aldap/, 'kerberos', 'crowd'].freeze
+
+  def ldap_enabled?
+    Gitlab.config.ldap.enabled
+  end
+
+  def provider_has_icon?(name)
+    PROVIDERS_WITH_ICONS.include?(name.to_s)
+  end
+
+  def auth_providers
+    Gitlab::OAuth::Provider.providers
+  end
+
+  def label_for_provider(name)
+    Gitlab::OAuth::Provider.label_for(name)
+  end
+
+  def form_based_provider?(name)
+    FORM_BASED_PROVIDERS.any? { |pattern| pattern === name.to_s }
+  end
+
+  def form_based_providers
+    auth_providers.select { |provider| form_based_provider?(provider) }
+  end
+
+  def crowd_enabled?
+    auth_providers.include? :crowd
+  end
+
+  def button_based_providers
+    auth_providers.reject { |provider| form_based_provider?(provider) }
+  end
+
+  def provider_image_tag(provider, size = 64)
+    label = label_for_provider(provider)
+
+    if provider_has_icon?(provider)
+      file_name = "#{provider.to_s.split('_').first}_#{size}.png"
+
+      image_tag(image_path("auth_buttons/#{file_name}"), alt: label, title: "Sign in with #{label}")
+    else
+      label
+    end
+  end
+
+  def auth_active?(provider)
+    current_user.identities.exists?(provider: provider.to_s)
+  end
+
+  extend self
+end
diff --git a/app/helpers/blob_helper.rb b/app/helpers/blob_helper.rb
new file mode 100644
index 00000000000..77d99140c43
--- /dev/null
+++ b/app/helpers/blob_helper.rb
@@ -0,0 +1,74 @@
+module BlobHelper
+  def highlight(blob_name, blob_content, nowrap: false, continue: false)
+    @formatter ||= Rouge::Formatters::HTMLGitlab.new(
+      nowrap: nowrap,
+      cssclass: 'code highlight',
+      lineanchors: true,
+      lineanchorsid: 'LC'
+    )
+
+    begin
+      @lexer ||= Rouge::Lexer.guess(filename: blob_name, source: blob_content).new
+      result = @formatter.format(@lexer.lex(blob_content, continue: continue)).html_safe
+    rescue
+      @lexer = Rouge::Lexers::PlainText
+      result = @formatter.format(@lexer.lex(blob_content)).html_safe
+    end
+
+    result
+  end
+
+  def no_highlight_files
+    %w(credits changelog news copying copyright license authors)
+  end
+
+  def edit_blob_link(project, ref, path, options = {})
+    blob =
+      begin
+        project.repository.blob_at(ref, path)
+      rescue
+        nil
+      end
+
+    if blob && blob.text?
+      text = 'Edit'
+      after = options[:after] || ''
+      from_mr = options[:from_merge_request_id]
+      link_opts = {}
+      link_opts[:from_merge_request_id] = from_mr if from_mr
+      cls = 'btn btn-small'
+      if allowed_tree_edit?(project, ref)
+        link_to(text,
+                namespace_project_edit_blob_path(project.namespace, project,
+                                                 tree_join(ref, path),
+                                                 link_opts),
+                class: cls
+               )
+      else
+        content_tag :span, text, class: cls + ' disabled'
+      end + after.html_safe
+    else
+      ''
+    end
+  end
+
+  def leave_edit_message
+    "Leave edit mode?\nAll unsaved changes will be lost."
+  end
+
+  def editing_preview_title(filename)
+    if Gitlab::MarkupHelper.previewable?(filename)
+      'Preview'
+    else
+      'Preview changes'
+    end
+  end
+
+  # Return an image icon depending on the file mode and extension
+  #
+  # mode - File unix mode
+  # mode - File name
+  def blob_icon(mode, name)
+    icon("#{file_type_icon_class('file', mode, name)} fw")
+  end
+end
diff --git a/app/helpers/branches_helper.rb b/app/helpers/branches_helper.rb
new file mode 100644
index 00000000000..d6eaa7d57bc
--- /dev/null
+++ b/app/helpers/branches_helper.rb
@@ -0,0 +1,17 @@
+module BranchesHelper
+  def can_remove_branch?(project, branch_name)
+    if project.protected_branch? branch_name
+      false
+    elsif branch_name == project.repository.root_ref
+      false
+    else
+      can?(current_user, :push_code, project)
+    end
+  end
+
+  def can_push_branch?(project, branch_name)
+    return false unless project.repository.branch_names.include?(branch_name)
+    
+    ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(branch_name)
+  end
+end
diff --git a/app/helpers/broadcast_messages_helper.rb b/app/helpers/broadcast_messages_helper.rb
new file mode 100644
index 00000000000..6484dca6b55
--- /dev/null
+++ b/app/helpers/broadcast_messages_helper.rb
@@ -0,0 +1,16 @@
+module BroadcastMessagesHelper
+  def broadcast_styling(broadcast_message)
+    styling = ''
+
+    if broadcast_message.color.present?
+      styling << "background-color: #{broadcast_message.color}"
+      styling << '; ' if broadcast_message.font.present?
+    end
+
+    if broadcast_message.font.present?
+      styling << "color: #{broadcast_message.font}"
+    end
+
+    styling
+  end
+end
diff --git a/app/helpers/commits_helper.rb b/app/helpers/commits_helper.rb
new file mode 100644
index 00000000000..d13d80be293
--- /dev/null
+++ b/app/helpers/commits_helper.rb
@@ -0,0 +1,183 @@
+# encoding: utf-8
+module CommitsHelper
+  # Returns a link to the commit author. If the author has a matching user and
+  # is a member of the current @project it will link to the team member page.
+  # Otherwise it will link to the author email as specified in the commit.
+  #
+  # options:
+  #  avatar: true will prepend the avatar image
+  #  size:   size of the avatar image in px
+  def commit_author_link(commit, options = {})
+    commit_person_link(commit, options.merge(source: :author))
+  end
+
+  # Just like #author_link but for the committer.
+  def commit_committer_link(commit, options = {})
+    commit_person_link(commit, options.merge(source: :committer))
+  end
+
+  def image_diff_class(diff)
+    if diff.deleted_file
+      "deleted"
+    elsif diff.new_file
+      "added"
+    else
+      nil
+    end
+  end
+
+  def commit_to_html(commit, project, inline = true)
+    template = inline ? "inline_commit" : "commit"
+    escape_javascript(render "projects/commits/#{template}", commit: commit, project: project) unless commit.nil?
+  end
+
+  # Breadcrumb links for a Project and, if applicable, a tree path
+  def commits_breadcrumbs
+    return unless @project && @ref
+
+    # Add the root project link and the arrow icon
+    crumbs = content_tag(:li) do
+      link_to(
+        @project.path,
+        namespace_project_commits_path(@project.namespace, @project, @ref)
+      )
+    end
+
+    if @path
+      parts = @path.split('/')
+
+      parts.each_with_index do |part, i|
+        crumbs << content_tag(:li) do
+          # The text is just the individual part, but the link needs all the parts before it
+          link_to(
+            part,
+            namespace_project_commits_path(
+              @project.namespace,
+              @project,
+              tree_join(@ref, parts[0..i].join('/'))
+            )
+          )
+        end
+      end
+    end
+
+    crumbs.html_safe
+  end
+
+  # Return Project default branch, if it present in array
+  # Else - first branch in array (mb last actual branch)
+  def commit_default_branch(project, branches)
+    branches.include?(project.default_branch) ? branches.delete(project.default_branch) : branches.pop
+  end
+
+  # Returns the sorted alphabetically links to branches, separated by a comma
+  def commit_branches_links(project, branches)
+    branches.sort.map do |branch|
+      link_to(
+        namespace_project_tree_path(project.namespace, project, branch)
+      ) do
+        content_tag :span, class: 'label label-gray' do
+          icon('code-fork') + ' ' + branch
+        end
+      end
+    end.join(" ").html_safe
+  end
+
+  # Returns the sorted links to tags, separated by a comma
+  def commit_tags_links(project, tags)
+    sorted = VersionSorter.rsort(tags)
+    sorted.map do |tag|
+      link_to(
+        namespace_project_commits_path(project.namespace, project,
+                                       project.repository.find_tag(tag).name)
+      ) do
+        content_tag :span, class: 'label label-gray' do
+          icon('tag') + ' ' + tag
+        end
+      end
+    end.join(" ").html_safe
+  end
+
+  def link_to_browse_code(project, commit)
+    if current_controller?(:projects, :commits)
+      if @repo.blob_at(commit.id, @path)
+        return link_to(
+          "Browse File »",
+          namespace_project_blob_path(project.namespace, project,
+                                      tree_join(commit.id, @path)),
+          class: "pull-right"
+        )
+      elsif @path.present?
+        return link_to(
+          "Browse Dir »",
+          namespace_project_tree_path(project.namespace, project,
+                                      tree_join(commit.id, @path)),
+          class: "pull-right"
+        )
+      end
+    end
+    link_to(
+      "Browse Code »",
+      namespace_project_tree_path(project.namespace, project, commit),
+      class: "pull-right"
+    )
+  end
+
+  protected
+
+  # Private: Returns a link to a person. If the person has a matching user and
+  # is a member of the current @project it will link to the team member page.
+  # Otherwise it will link to the person email as specified in the commit.
+  #
+  # options:
+  #  source: one of :author or :committer
+  #  avatar: true will prepend the avatar image
+  #  size:   size of the avatar image in px
+  def commit_person_link(commit, options = {})
+    user = commit.send(options[:source])
+    
+    source_name = clean(commit.send "#{options[:source]}_name".to_sym)
+    source_email = clean(commit.send "#{options[:source]}_email".to_sym)
+
+    person_name = user.try(:name) || source_name
+    person_email = user.try(:email) || source_email
+
+    text =
+      if options[:avatar]
+        avatar = image_tag(avatar_icon(person_email, options[:size]), class: "avatar #{"s#{options[:size]}" if options[:size]}", width: options[:size], alt: "")
+        %Q{#{avatar} <span class="commit-#{options[:source]}-name">#{person_name}</span>}
+      else
+        person_name
+      end
+
+    options = {
+      class: "commit-#{options[:source]}-link has_tooltip",
+      data: { :'original-title' => sanitize(source_email) }
+    }
+
+    if user.nil?
+      mail_to(source_email, text.html_safe, options)
+    else
+      link_to(text.html_safe, user_path(user), options)
+    end
+  end
+
+  def view_file_btn(commit_sha, diff, project)
+    link_to(
+      namespace_project_blob_path(project.namespace, project,
+                                  tree_join(commit_sha, diff.new_path)),
+      class: 'btn btn-small view-file js-view-file'
+    ) do
+      raw('View file @') + content_tag(:span, commit_sha[0..6],
+                                       class: 'commit-short-id')
+    end
+  end
+
+  def truncate_sha(sha)
+    Commit.truncate_sha(sha)
+  end
+
+  def clean(string)
+    Sanitize.clean(string, remove_contents: true)
+  end
+end
diff --git a/app/helpers/compare_helper.rb b/app/helpers/compare_helper.rb
new file mode 100644
index 00000000000..f1dc906cab4
--- /dev/null
+++ b/app/helpers/compare_helper.rb
@@ -0,0 +1,21 @@
+module CompareHelper
+  def create_mr_button?(from = params[:from], to = params[:to], project = @project)
+    from.present? &&
+      to.present? &&
+      from != to &&
+      project.merge_requests_enabled &&
+      project.repository.branch_names.include?(from) &&
+      project.repository.branch_names.include?(to)
+  end
+
+  def create_mr_path(from = params[:from], to = params[:to], project = @project)
+    new_namespace_project_merge_request_path(
+      project.namespace,
+      project,
+      merge_request: {
+        source_branch: to,
+        target_branch: from
+      }
+    )
+  end
+end
diff --git a/app/helpers/dashboard_helper.rb b/app/helpers/dashboard_helper.rb
new file mode 100644
index 00000000000..c25b54eadc6
--- /dev/null
+++ b/app/helpers/dashboard_helper.rb
@@ -0,0 +1,9 @@
+module DashboardHelper
+  def assigned_issues_dashboard_path
+    issues_dashboard_path(assignee_id: current_user.id)
+  end
+
+  def assigned_mrs_dashboard_path
+    merge_requests_dashboard_path(assignee_id: current_user.id)
+  end
+end
diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
new file mode 100644
index 00000000000..6ffa1a7121d
--- /dev/null
+++ b/app/helpers/diff_helper.rb
@@ -0,0 +1,170 @@
+module DiffHelper
+  def allowed_diff_size
+    if diff_hard_limit_enabled?
+      Commit::DIFF_HARD_LIMIT_FILES
+    else
+      Commit::DIFF_SAFE_FILES
+    end
+  end
+
+  def allowed_diff_lines
+    if diff_hard_limit_enabled?
+      Commit::DIFF_HARD_LIMIT_LINES
+    else
+      Commit::DIFF_SAFE_LINES
+    end
+  end
+
+  def safe_diff_files(diffs)
+    lines = 0
+    safe_files = []
+    diffs.first(allowed_diff_size).each do |diff|
+      lines += diff.diff.lines.count
+      break if lines > allowed_diff_lines
+      safe_files << Gitlab::Diff::File.new(diff)
+    end
+    safe_files
+  end
+
+  def diff_hard_limit_enabled?
+    # Enabling hard limit allows user to see more diff information
+    if params[:force_show_diff].present?
+      true
+    else
+      false
+    end
+  end
+
+  def generate_line_code(file_path, line)
+    Gitlab::Diff::LineCode.generate(file_path, line.new_pos, line.old_pos)
+  end
+
+  def parallel_diff(diff_file, index)
+    lines = []
+    skip_next = false
+
+    # Building array of lines
+    #
+    # [
+    # left_type, left_line_number, left_line_content, left_line_code,
+    # right_line_type, right_line_number, right_line_content, right_line_code
+    # ]
+    #
+    diff_file.diff_lines.each do |line|
+
+      full_line = line.text
+      type = line.type
+      line_code = generate_line_code(diff_file.file_path, line)
+      line_new = line.new_pos
+      line_old = line.old_pos
+
+      next_line = diff_file.next_line(line.index)
+
+      if next_line
+        next_line_code = generate_line_code(diff_file.file_path, next_line)
+        next_type = next_line.type
+        next_line = next_line.text
+      end
+
+      if type == 'match' || type.nil?
+        # line in the right panel is the same as in the left one
+        line = [type, line_old, full_line, line_code, type, line_new, full_line, line_code]
+        lines.push(line)
+      elsif type == 'old'
+        if next_type == 'new'
+          # Left side has text removed, right side has text added
+          line = [type, line_old, full_line, line_code, next_type, line_new, next_line, next_line_code]
+          lines.push(line)
+          skip_next = true
+        elsif next_type == 'old' || next_type.nil?
+          # Left side has text removed, right side doesn't have any change
+          # No next line code, no new line number, no new line text
+          line = [type, line_old, full_line, line_code, next_type, nil, "&nbsp;", nil]
+          lines.push(line)
+        end
+      elsif type == 'new'
+        if skip_next
+          # Change has been already included in previous line so no need to do it again
+          skip_next = false
+          next
+        else
+          # Change is only on the right side, left side has no change
+          line = [nil, nil, "&nbsp;", line_code, type, line_new, full_line, line_code]
+          lines.push(line)
+        end
+      end
+    end
+    lines
+  end
+
+  def unfold_bottom_class(bottom)
+    (bottom) ? 'js-unfold-bottom' : ''
+  end
+
+  def unfold_class(unfold)
+    (unfold) ? 'unfold js-unfold' : ''
+  end
+
+  def diff_line_content(line)
+    if line.blank?
+      " &nbsp;"
+    else
+      line
+    end
+  end
+
+  def line_comments
+    @line_comments ||= @line_notes.select(&:active?).group_by(&:line_code)
+  end
+
+  def organize_comments(type_left, type_right, line_code_left, line_code_right)
+    comments_left = comments_right = nil
+
+    unless type_left.nil? && type_right == 'new'
+      comments_left = line_comments[line_code_left]
+    end
+
+    unless type_left.nil? && type_right.nil?
+      comments_right = line_comments[line_code_right]
+    end
+
+    [comments_left, comments_right]
+  end
+
+  def inline_diff_btn
+    params_copy = params.dup
+    params_copy[:view] = 'inline'
+    # Always use HTML to handle case where JSON diff rendered this button
+    params_copy.delete(:format)
+
+    link_to url_for(params_copy), id: "inline-diff-btn", class: (params[:view] != 'parallel' ? 'btn btn-sm active' : 'btn btn-sm') do
+      'Inline'
+    end
+  end
+
+  def parallel_diff_btn
+    params_copy = params.dup
+    params_copy[:view] = 'parallel'
+    # Always use HTML to handle case where JSON diff rendered this button
+    params_copy.delete(:format)
+
+    link_to url_for(params_copy), id: "parallel-diff-btn", class: (params[:view] == 'parallel' ? 'btn active btn-sm' : 'btn btn-sm') do
+      'Side-by-side'
+    end
+  end
+
+  def submodule_link(blob, ref, repository = @repository)
+    tree, commit = submodule_links(blob, ref, repository)
+    commit_id = if commit.nil?
+                  blob.id[0..10]
+                else
+                  link_to "#{blob.id[0..10]}", commit
+                end
+
+    [
+      content_tag(:span, link_to(truncate(blob.name, length: 40), tree)),
+      '@',
+      content_tag(:span, commit_id, class: 'monospace'),
+    ].join(' ').html_safe
+  end
+end
diff --git a/app/helpers/emails_helper.rb b/app/helpers/emails_helper.rb
new file mode 100644
index 00000000000..45788ba95ac
--- /dev/null
+++ b/app/helpers/emails_helper.rb
@@ -0,0 +1,57 @@
+module EmailsHelper
+
+  # Google Actions
+  # https://developers.google.com/gmail/markup/reference/go-to-action
+  def email_action(url)
+    name = action_title(url)
+    if name
+      data = {
+        "@context" => "http://schema.org",
+        "@type" => "EmailMessage",
+        "action" => {
+          "@type" => "ViewAction",
+          "name" => name,
+          "url" => url,
+          }
+        }
+
+      content_tag :script, type: 'application/ld+json' do
+        data.to_json.html_safe
+      end
+    end
+  end
+
+  def action_title(url)
+    return unless url
+    ["merge_requests", "issues", "commit"].each do |action|
+      if url.split("/").include?(action)
+        return "View #{action.humanize.singularize}"
+      end
+    end
+  end
+
+  def color_email_diff(diffcontent)
+    formatter = Rouge::Formatters::HTML.new(css_class: 'highlight', inline_theme: 'github')
+    lexer = Rouge::Lexers::Diff
+    raw formatter.format(lexer.lex(diffcontent))
+  end
+
+  def password_reset_token_valid_time
+    valid_hours = Devise.reset_password_within / 60 / 60
+    if valid_hours >= 24
+      unit = 'day'
+      valid_length = (valid_hours / 24).floor
+    else
+      unit = 'hour'
+      valid_length = valid_hours.floor
+    end
+
+    pluralize(valid_length, unit)
+  end
+
+  def reset_token_expire_message
+    link_tag = link_to('request a new one', new_user_password_url(user_email: @user.email))
+    msg = "This link is valid for #{password_reset_token_valid_time}.  "
+    msg << "After it expires, you can #{link_tag}."
+  end
+end
diff --git a/app/helpers/events_helper.rb b/app/helpers/events_helper.rb
new file mode 100644
index 00000000000..76602614bcd
--- /dev/null
+++ b/app/helpers/events_helper.rb
@@ -0,0 +1,200 @@
+module EventsHelper
+  def link_to_author(event)
+    author = event.author
+
+    if author
+      link_to author.name, user_path(author.username)
+    else
+      event.author_name
+    end
+  end
+
+  def event_action_name(event)
+    target =  if event.target_type
+                if event.note?
+                  event.note_target_type
+                else
+                  event.target_type.titleize.downcase
+                end
+              else
+                'project'
+              end
+
+    [event.action_name, target].join(" ")
+  end
+
+  def event_filter_link(key, tooltip)
+    key = key.to_s
+    active = 'active' if @event_filter.active?(key)
+    link_opts = {
+      class: "event-filter-link btn btn-default #{active}",
+      id:    "#{key}_event_filter",
+      title: "Filter by #{tooltip.downcase}",
+    }
+
+    link_to request.path, link_opts do
+      content_tag(:span, ' ' + tooltip)
+    end
+  end
+
+  def icon_for_event
+    {
+      EventFilter.push     => 'upload',
+      EventFilter.merged   => 'check-square-o',
+      EventFilter.comments => 'comments',
+      EventFilter.team     => 'user',
+    }
+  end
+
+  def event_feed_title(event)
+    words = []
+    words << event.author_name
+    words << event_action_name(event)
+
+    if event.push?
+      words << event.ref_type
+      words << event.ref_name
+      words << "at"
+    elsif event.commented?
+      if event.note_commit?
+        words << event.note_short_commit_id
+      else
+        words << "##{truncate event.note_target_iid}"
+      end
+      words << "at"
+    elsif event.target
+      words << "##{event.target_iid}:"
+      words << event.target.title if event.target.respond_to?(:title)
+      words << "at"
+    end
+
+    words << event.project_name
+
+    words.join(" ")
+  end
+
+  def event_feed_url(event)
+    if event.issue?
+      namespace_project_issue_url(event.project.namespace, event.project,
+                                  event.issue)
+    elsif event.merge_request?
+      namespace_project_merge_request_url(event.project.namespace,
+                                          event.project, event.merge_request)
+    elsif event.note? && event.note_commit?
+      namespace_project_commit_url(event.project.namespace, event.project,
+                                   event.note_target)
+    elsif event.note?
+      if event.note_target
+        if event.note_commit?
+          namespace_project_commit_path(event.project.namespace, event.project,
+                                        event.note_commit_id,
+                                        anchor: dom_id(event.target))
+        elsif event.note_project_snippet?
+          namespace_project_snippet_path(event.project.namespace,
+                                         event.project, event.note_target)
+        else
+          event_note_target_path(event)
+        end
+      end
+    elsif event.push?
+      if event.push_with_commits? && event.md_ref?
+        if event.commits_count > 1
+          namespace_project_compare_url(event.project.namespace, event.project,
+                                        from: event.commit_from, to:
+                                        event.commit_to)
+        else
+          namespace_project_commit_url(event.project.namespace, event.project,
+                                       id: event.commit_to)
+        end
+      else
+        namespace_project_commits_url(event.project.namespace, event.project,
+                                      event.ref_name)
+      end
+    end
+  end
+
+  def event_feed_summary(event)
+    if event.issue?
+      render "events/event_issue", issue: event.issue
+    elsif event.push?
+      render "events/event_push", event: event
+    elsif event.merge_request?
+      render "events/event_merge_request", merge_request: event.merge_request
+    elsif event.note?
+      render "events/event_note", note: event.note
+    end
+  end
+
+  def event_note_target_path(event)
+    if event.note? && event.note_commit?
+      namespace_project_commit_path(event.project.namespace, event.project,
+                                    event.note_target)
+    else
+      polymorphic_path([event.project.namespace.becomes(Namespace),
+                        event.project, event.note_target],
+                       anchor: dom_id(event.target))
+    end
+  end
+
+  def event_note_title_html(event)
+    if event.note_target
+      if event.note_commit?
+        link_to(
+          namespace_project_commit_path(event.project.namespace, event.project,
+                                        event.note_commit_id,
+                                        anchor: dom_id(event.target)),
+          class: "commit_short_id"
+        ) do
+          "#{event.note_target_type} #{event.note_short_commit_id}"
+        end
+      elsif event.note_project_snippet?
+        link_to(namespace_project_snippet_path(event.project.namespace,
+                                               event.project,
+                                               event.note_target)) do
+          "#{event.note_target_type} ##{truncate event.note_target_id}"
+        end
+      else
+        link_to event_note_target_path(event) do
+          "#{event.note_target_type} ##{truncate event.note_target_iid}"
+        end
+      end
+    else
+      content_tag :strong do
+        "(deleted)"
+      end
+    end
+  end
+
+  def event_note(text, options = {})
+    text = first_line_in_markdown(text, 150, options)
+    sanitize(text, tags: %w(a img b pre code p span))
+  end
+
+  def event_commit_title(message)
+    escape_once(truncate(message.split("\n").first, length: 70))
+  rescue
+    "--broken encoding"
+  end
+
+  def event_to_atom(xml, event)
+    if event.proper?
+      xml.entry do
+        event_link = event_feed_url(event)
+        event_title = event_feed_title(event)
+        event_summary = event_feed_summary(event)
+
+        xml.id      "tag:#{request.host},#{event.created_at.strftime("%Y-%m-%d")}:#{event.id}"
+        xml.link    href: event_link
+        xml.title   truncate(event_title, length: 80)
+        xml.updated event.created_at.xmlschema
+        xml.media   :thumbnail, width: "40", height: "40", url: avatar_icon(event.author_email)
+        xml.author do |author|
+          xml.name event.author_name
+          xml.email event.author_email
+        end
+
+        xml.summary(type: "xhtml") { |x| x << event_summary unless event_summary.nil? }
+      end
+    end
+  end
+end
diff --git a/app/helpers/explore_helper.rb b/app/helpers/explore_helper.rb
new file mode 100644
index 00000000000..0d291f9a87e
--- /dev/null
+++ b/app/helpers/explore_helper.rb
@@ -0,0 +1,17 @@
+module ExploreHelper
+  def explore_projects_filter_path(options={})
+    exist_opts = {
+      sort: params[:sort],
+      scope: params[:scope],
+      group: params[:group],
+      tag: params[:tag],
+      visibility_level: params[:visibility_level],
+    }
+
+    options = exist_opts.merge(options)
+
+    path = explore_projects_path
+    path << "?#{options.to_param}"
+    path
+  end
+end
diff --git a/app/helpers/external_wiki_helper.rb b/app/helpers/external_wiki_helper.rb
new file mode 100644
index 00000000000..838b85afdfe
--- /dev/null
+++ b/app/helpers/external_wiki_helper.rb
@@ -0,0 +1,11 @@
+module ExternalWikiHelper
+  def get_project_wiki_path(project)
+    external_wiki_service = project.services.
+      select { |service| service.to_param == 'external_wiki' }.first
+    if external_wiki_service.present? && external_wiki_service.active?
+      external_wiki_service.properties['external_wiki_url']
+    else
+      namespace_project_wiki_path(project.namespace, project, :home)
+    end
+  end
+end
diff --git a/app/helpers/git_helper.rb b/app/helpers/git_helper.rb
new file mode 100644
index 00000000000..09684955233
--- /dev/null
+++ b/app/helpers/git_helper.rb
@@ -0,0 +1,5 @@
+module GitHelper
+  def strip_gpg_signature(text)
+    text.gsub(/-----BEGIN PGP SIGNATURE-----(.*)-----END PGP SIGNATURE-----/m, "")
+  end
+end
diff --git a/app/helpers/gitlab/appearances_helper.rb b/app/helpers/gitlab/appearances_helper.rb
deleted file mode 100644
index 54cafcd9e40..00000000000
--- a/app/helpers/gitlab/appearances_helper.rb
+++ /dev/null
@@ -1,23 +0,0 @@
-module Gitlab
-  module AppearancesHelper
-    def brand_item
-      nil
-    end
-
-    def brand_title
-      'GitLab Community Edition'
-    end
-
-    def brand_image
-      nil
-    end
-
-    def brand_text
-      nil
-    end
-
-    def brand_header_logo
-      image_tag 'logo.svg'
-    end
-  end
-end
diff --git a/app/helpers/gitlab/application_helper.rb b/app/helpers/gitlab/application_helper.rb
deleted file mode 100644
index b019ffa5fe2..00000000000
--- a/app/helpers/gitlab/application_helper.rb
+++ /dev/null
@@ -1,317 +0,0 @@
-require 'digest/md5'
-require 'uri'
-
-module Gitlab
-  module ApplicationHelper
-    # Check if a particular controller is the current one
-    #
-    # args - One or more controller names to check
-    #
-    # Examples
-    #
-    #   # On TreeController
-    #   current_controller?(:tree)           # => true
-    #   current_controller?(:commits)        # => false
-    #   current_controller?(:commits, :tree) # => true
-    def current_controller?(*args)
-      args.any? { |v| v.to_s.downcase == controller.controller_name }
-    end
-
-    # Check if a particular action is the current one
-    #
-    # args - One or more action names to check
-    #
-    # Examples
-    #
-    #   # On Projects#new
-    #   current_action?(:new)           # => true
-    #   current_action?(:create)        # => false
-    #   current_action?(:new, :create)  # => true
-    def current_action?(*args)
-      args.any? { |v| v.to_s.downcase == action_name }
-    end
-
-    def project_icon(project_id, options = {})
-      project =
-        if project_id.is_a?(Project)
-          project = project_id
-        else
-          Project.find_with_namespace(project_id)
-        end
-
-      if project.avatar_url
-        image_tag project.avatar_url, options
-      else # generated icon
-        project_identicon(project, options)
-      end
-    end
-
-    def project_identicon(project, options = {})
-      allowed_colors = {
-        red: 'FFEBEE',
-        purple: 'F3E5F5',
-        indigo: 'E8EAF6',
-        blue: 'E3F2FD',
-        teal: 'E0F2F1',
-        orange: 'FBE9E7',
-        gray: 'EEEEEE'
-      }
-
-      options[:class] ||= ''
-      options[:class] << ' identicon'
-      bg_key = project.id % 7
-      style = "background-color: ##{ allowed_colors.values[bg_key] }; color: #555"
-
-      content_tag(:div, class: options[:class], style: style) do
-        project.name[0, 1].upcase
-      end
-    end
-
-    def avatar_icon(user_email = '', size = nil)
-      user = User.find_by(email: user_email)
-
-      if user
-        user.avatar_url(size) || default_avatar
-      else
-        gravatar_icon(user_email, size)
-      end
-    end
-
-    def gravatar_icon(user_email = '', size = nil)
-      GravatarService.new.execute(user_email, size) ||
-        default_avatar
-    end
-
-    def default_avatar
-      image_path('no_avatar.png')
-    end
-
-    def last_commit(project)
-      if project.repo_exists?
-        time_ago_with_tooltip(project.repository.commit.committed_date)
-      else
-        'Never'
-      end
-    rescue
-      'Never'
-    end
-
-    def grouped_options_refs
-      repository = @project.repository
-
-      options = [
-        ['Branches', repository.branch_names],
-        ['Tags', VersionSorter.rsort(repository.tag_names)]
-      ]
-
-      # If reference is commit id - we should add it to branch/tag selectbox
-      if(@ref && !options.flatten.include?(@ref) &&
-         @ref =~ /\A[0-9a-zA-Z]{6,52}\z/)
-        options << ['Commit', [@ref]]
-      end
-
-      grouped_options_for_select(options, @ref || @project.default_branch)
-    end
-
-    def emoji_autocomplete_source
-      # should be an array of strings
-      # so to_s can be called, because it is sufficient and to_json is too slow
-      Emoji.names.to_s
-    end
-
-    # Define whenever show last push event
-    # with suggestion to create MR
-    def show_last_push_widget?(event)
-      # Skip if event is not about added or modified non-master branch
-      return false unless event && event.last_push_to_non_root? && !event.rm_ref?
-
-      project = event.project
-
-      # Skip if project repo is empty or MR disabled
-      return false unless project && !project.empty_repo? && project.merge_requests_enabled
-
-      # Skip if user already created appropriate MR
-      return false if project.merge_requests.where(source_branch: event.branch_name).opened.any?
-
-      # Skip if user removed branch right after that
-      return false unless project.repository.branch_names.include?(event.branch_name)
-
-      true
-    end
-
-    def hexdigest(string)
-      Digest::SHA1.hexdigest string
-    end
-
-    def simple_sanitize(str)
-      sanitize(str, tags: %w(a span))
-    end
-
-    def body_data_page
-      path = controller.controller_path.split('/')
-      namespace = path.first if path.second
-
-      [namespace, controller.controller_name, controller.action_name].compact.join(':')
-    end
-
-    # shortcut for gitlab config
-    def gitlab_config
-      Gitlab.config.gitlab
-    end
-
-    # shortcut for gitlab extra config
-    def extra_config
-      Gitlab.config.extra
-    end
-
-    def search_placeholder
-      if @project && @project.persisted?
-        'Search in this project'
-      elsif @snippet || @snippets || @show_snippets
-        'Search snippets'
-      elsif @group && @group.persisted?
-        'Search in this group'
-      else
-        'Search'
-      end
-    end
-
-    def broadcast_message
-      BroadcastMessage.current
-    end
-
-    # Render a `time` element with Javascript-based relative date and tooltip
-    #
-    # time       - Time object
-    # placement  - Tooltip placement String (default: "top")
-    # html_class - Custom class for `time` element (default: "time_ago")
-    # skip_js    - When true, exclude the `script` tag (default: false)
-    #
-    # By default also includes a `script` element with Javascript necessary to
-    # initialize the `timeago` jQuery extension. If this method is called many
-    # times, for example rendering hundreds of commits, it's advisable to disable
-    # this behavior using the `skip_js` argument and re-initializing `timeago`
-    # manually once all of the elements have been rendered.
-    #
-    # A `js-timeago` class is always added to the element, even when a custom
-    # `html_class` argument is provided.
-    #
-    # Returns an HTML-safe String
-    def time_ago_with_tooltip(time, placement: 'top', html_class: 'time_ago', skip_js: false)
-      element = content_tag :time, time.to_s,
-        class: "#{html_class} js-timeago",
-        datetime: time.getutc.iso8601,
-        title: time.in_time_zone.stamp('Aug 21, 2011 9:23pm'),
-        data: { toggle: 'tooltip', placement: placement }
-
-      element += javascript_tag "$('.js-timeago').timeago()" unless skip_js
-
-      element
-    end
-
-    def render_markup(file_name, file_content)
-      if gitlab_markdown?(file_name)
-        Haml::Helpers.preserve(markdown(file_content))
-      elsif asciidoc?(file_name)
-        asciidoc(file_content)
-      elsif plain?(file_name)
-        content_tag :pre, class: 'plain-readme' do
-          file_content
-        end
-      else
-        GitHub::Markup.render(file_name, file_content).
-          force_encoding(file_content.encoding).html_safe
-      end
-    rescue RuntimeError
-      simple_format(file_content)
-    end
-
-    def plain?(filename)
-      Gitlab::MarkupHelper.plain?(filename)
-    end
-
-    def markup?(filename)
-      Gitlab::MarkupHelper.markup?(filename)
-    end
-
-    def gitlab_markdown?(filename)
-      Gitlab::MarkupHelper.gitlab_markdown?(filename)
-    end
-
-    def asciidoc?(filename)
-      Gitlab::MarkupHelper.asciidoc?(filename)
-    end
-
-    def promo_host
-      'about.gitlab.com'
-    end
-
-    def promo_url
-      'https://' + promo_host
-    end
-
-    def page_filter_path(options = {})
-      without = options.delete(:without)
-
-      exist_opts = {
-        state: params[:state],
-        scope: params[:scope],
-        label_name: params[:label_name],
-        milestone_id: params[:milestone_id],
-        assignee_id: params[:assignee_id],
-        author_id: params[:author_id],
-        sort: params[:sort],
-      }
-
-      options = exist_opts.merge(options)
-
-      if without.present?
-        without.each do |key|
-          options.delete(key)
-        end
-      end
-
-      path = request.path
-      path << "?#{options.to_param}"
-      path
-    end
-
-    def outdated_browser?
-      browser.ie? && browser.version.to_i < 10
-    end
-
-    def path_to_key(key, admin = false)
-      if admin
-        admin_user_key_path(@user, key)
-      else
-        profile_key_path(key)
-      end
-    end
-
-    def state_filters_text_for(entity, project)
-      titles = {
-        opened: "Open"
-      }
-
-      entity_title = titles[entity] || entity.to_s.humanize
-
-      count =
-        if project.nil?
-          nil
-        elsif current_controller?(:issues)
-          project.issues.send(entity).count
-        elsif current_controller?(:merge_requests)
-          project.merge_requests.send(entity).count
-        end
-
-      html = content_tag :span, entity_title
-
-      if count.present?
-        html += " "
-        html += content_tag :span, number_with_delimiter(count), class: 'badge'
-      end
-
-      html.html_safe
-    end
-  end
-end
diff --git a/app/helpers/gitlab/application_settings_helper.rb b/app/helpers/gitlab/application_settings_helper.rb
deleted file mode 100644
index 7132d3dcdad..00000000000
--- a/app/helpers/gitlab/application_settings_helper.rb
+++ /dev/null
@@ -1,61 +0,0 @@
-module Gitlab
-  module ApplicationSettingsHelper
-    def gravatar_enabled?
-      current_application_settings.gravatar_enabled?
-    end
-
-    def twitter_sharing_enabled?
-      current_application_settings.twitter_sharing_enabled?
-    end
-
-    def signup_enabled?
-      current_application_settings.signup_enabled?
-    end
-
-    def signin_enabled?
-      current_application_settings.signin_enabled?
-    end
-
-    def extra_sign_in_text
-      current_application_settings.sign_in_text
-    end
-
-    def user_oauth_applications?
-      current_application_settings.user_oauth_applications
-    end
-
-    # Return a group of checkboxes that use Bootstrap's button plugin for a
-    # toggle button effect.
-    def restricted_level_checkboxes(help_block_id)
-      Gitlab::VisibilityLevel.options.map do |name, level|
-        checked = restricted_visibility_levels(true).include?(level)
-        css_class = 'btn'
-        css_class += ' active' if checked
-        checkbox_name = 'application_setting[restricted_visibility_levels][]'
-
-        label_tag(checkbox_name, class: css_class) do
-          check_box_tag(checkbox_name, level, checked,
-                        autocomplete: 'off',
-                        'aria-describedby' => help_block_id) + name
-        end
-      end
-    end
-
-    # Return a group of checkboxes that use Bootstrap's button plugin for a
-    # toggle button effect.
-    def import_sources_checkboxes(help_block_id)
-      Gitlab::ImportSources.options.map do |name, source|
-        checked = current_application_settings.import_sources.include?(source)
-        css_class = 'btn'
-        css_class += ' active' if checked
-        checkbox_name = 'application_setting[import_sources][]'
-
-        label_tag(checkbox_name, class: css_class) do
-          check_box_tag(checkbox_name, source, checked,
-                        autocomplete: 'off',
-                        'aria-describedby' => help_block_id) + name
-        end
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/auth_helper.rb b/app/helpers/gitlab/auth_helper.rb
deleted file mode 100644
index fbd52dbca3d..00000000000
--- a/app/helpers/gitlab/auth_helper.rb
+++ /dev/null
@@ -1,52 +0,0 @@
-module Gitlab
-  module AuthHelper
-    PROVIDERS_WITH_ICONS = %w(twitter github gitlab bitbucket google_oauth2).freeze
-    FORM_BASED_PROVIDERS = [/\Aldap/, 'kerberos'].freeze
-
-    def ldap_enabled?
-      Gitlab.config.ldap.enabled
-    end
-
-    def provider_has_icon?(name)
-      PROVIDERS_WITH_ICONS.include?(name.to_s)
-    end
-
-    def auth_providers
-      Gitlab::OAuth::Provider.providers
-    end
-
-    def label_for_provider(name)
-      Gitlab::OAuth::Provider.label_for(name)
-    end
-
-    def form_based_provider?(name)
-      FORM_BASED_PROVIDERS.any? { |pattern| pattern === name.to_s }
-    end
-
-    def form_based_providers
-      auth_providers.select { |provider| form_based_provider?(provider) }
-    end
-
-    def button_based_providers
-      auth_providers.reject { |provider| form_based_provider?(provider) }
-    end
-
-    def provider_image_tag(provider, size = 64)
-      label = label_for_provider(provider)
-
-      if provider_has_icon?(provider)
-        file_name = "#{provider.to_s.split('_').first}_#{size}.png"
-
-        image_tag("auth_buttons/#{file_name}", alt: label, title: "Sign in with #{label}")
-      else
-        label
-      end
-    end
-
-    def auth_active?(provider)
-      current_user.identities.exists?(provider: provider.to_s)
-    end
-
-    extend self
-  end
-end
diff --git a/app/helpers/gitlab/blob_helper.rb b/app/helpers/gitlab/blob_helper.rb
deleted file mode 100644
index 8b53ba8b54f..00000000000
--- a/app/helpers/gitlab/blob_helper.rb
+++ /dev/null
@@ -1,76 +0,0 @@
-module Gitlab
-  module BlobHelper
-    def highlight(blob_name, blob_content, nowrap: false, continue: false)
-      @formatter ||= Rouge::Formatters::HTMLGitlab.new(
-        nowrap: nowrap,
-        cssclass: 'code highlight',
-        lineanchors: true,
-        lineanchorsid: 'LC'
-      )
-
-      begin
-        @lexer ||= Rouge::Lexer.guess(filename: blob_name, source: blob_content).new
-        result = @formatter.format(@lexer.lex(blob_content, continue: continue)).html_safe
-      rescue
-        @lexer = Rouge::Lexers::PlainText
-        result = @formatter.format(@lexer.lex(blob_content)).html_safe
-      end
-
-      result
-    end
-
-    def no_highlight_files
-      %w(credits changelog news copying copyright license authors)
-    end
-
-    def edit_blob_link(project, ref, path, options = {})
-      blob =
-        begin
-          project.repository.blob_at(ref, path)
-        rescue
-          nil
-        end
-
-      if blob && blob.text?
-        text = 'Edit'
-        after = options[:after] || ''
-        from_mr = options[:from_merge_request_id]
-        link_opts = {}
-        link_opts[:from_merge_request_id] = from_mr if from_mr
-        cls = 'btn btn-small'
-        if allowed_tree_edit?(project, ref)
-          link_to(text,
-                  namespace_project_edit_blob_path(project.namespace, project,
-                                                   tree_join(ref, path),
-                                                   link_opts),
-                  class: cls
-                 )
-        else
-          content_tag :span, text, class: cls + ' disabled'
-        end + after.html_safe
-      else
-        ''
-      end
-    end
-
-    def leave_edit_message
-      "Leave edit mode?\nAll unsaved changes will be lost."
-    end
-
-    def editing_preview_title(filename)
-      if Gitlab::MarkupHelper.previewable?(filename)
-        'Preview'
-      else
-        'Preview changes'
-      end
-    end
-
-    # Return an image icon depending on the file mode and extension
-    #
-    # mode - File unix mode
-    # mode - File name
-    def blob_icon(mode, name)
-      icon("#{file_type_icon_class('file', mode, name)} fw")
-    end
-  end
-end
diff --git a/app/helpers/gitlab/branches_helper.rb b/app/helpers/gitlab/branches_helper.rb
deleted file mode 100644
index ecc56002e84..00000000000
--- a/app/helpers/gitlab/branches_helper.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-module Gitlab
-  module BranchesHelper
-    def can_remove_branch?(project, branch_name)
-      if project.protected_branch? branch_name
-        false
-      elsif branch_name == project.repository.root_ref
-        false
-      else
-        can?(current_user, :push_code, project)
-      end
-    end
-
-    def can_push_branch?(project, branch_name)
-      return false unless project.repository.branch_names.include?(branch_name)
-      
-      ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(branch_name)
-    end
-  end
-end
diff --git a/app/helpers/gitlab/broadcast_messages_helper.rb b/app/helpers/gitlab/broadcast_messages_helper.rb
deleted file mode 100644
index 93f0b0ec5ae..00000000000
--- a/app/helpers/gitlab/broadcast_messages_helper.rb
+++ /dev/null
@@ -1,18 +0,0 @@
-module Gitlab
-  module BroadcastMessagesHelper
-    def broadcast_styling(broadcast_message)
-      styling = ''
-
-      if broadcast_message.color.present?
-        styling << "background-color: #{broadcast_message.color}"
-        styling << '; ' if broadcast_message.font.present?
-      end
-
-      if broadcast_message.font.present?
-        styling << "color: #{broadcast_message.font}"
-      end
-
-      styling
-    end
-  end
-end
diff --git a/app/helpers/gitlab/commits_helper.rb b/app/helpers/gitlab/commits_helper.rb
deleted file mode 100644
index 8a3de838b39..00000000000
--- a/app/helpers/gitlab/commits_helper.rb
+++ /dev/null
@@ -1,185 +0,0 @@
-# encoding: utf-8
-module Gitlab
-  module CommitsHelper
-    # Returns a link to the commit author. If the author has a matching user and
-    # is a member of the current @project it will link to the team member page.
-    # Otherwise it will link to the author email as specified in the commit.
-    #
-    # options:
-    #  avatar: true will prepend the avatar image
-    #  size:   size of the avatar image in px
-    def commit_author_link(commit, options = {})
-      commit_person_link(commit, options.merge(source: :author))
-    end
-
-    # Just like #author_link but for the committer.
-    def commit_committer_link(commit, options = {})
-      commit_person_link(commit, options.merge(source: :committer))
-    end
-
-    def image_diff_class(diff)
-      if diff.deleted_file
-        "deleted"
-      elsif diff.new_file
-        "added"
-      else
-        nil
-      end
-    end
-
-    def commit_to_html(commit, project, inline = true)
-      template = inline ? "inline_commit" : "commit"
-      escape_javascript(render "projects/commits/#{template}", commit: commit, project: project) unless commit.nil?
-    end
-
-    # Breadcrumb links for a Project and, if applicable, a tree path
-    def commits_breadcrumbs
-      return unless @project && @ref
-
-      # Add the root project link and the arrow icon
-      crumbs = content_tag(:li) do
-        link_to(
-          @project.path,
-          namespace_project_commits_path(@project.namespace, @project, @ref)
-        )
-      end
-
-      if @path
-        parts = @path.split('/')
-
-        parts.each_with_index do |part, i|
-          crumbs << content_tag(:li) do
-            # The text is just the individual part, but the link needs all the parts before it
-            link_to(
-              part,
-              namespace_project_commits_path(
-                @project.namespace,
-                @project,
-                tree_join(@ref, parts[0..i].join('/'))
-              )
-            )
-          end
-        end
-      end
-
-      crumbs.html_safe
-    end
-
-    # Return Project default branch, if it present in array
-    # Else - first branch in array (mb last actual branch)
-    def commit_default_branch(project, branches)
-      branches.include?(project.default_branch) ? branches.delete(project.default_branch) : branches.pop
-    end
-
-    # Returns the sorted alphabetically links to branches, separated by a comma
-    def commit_branches_links(project, branches)
-      branches.sort.map do |branch|
-        link_to(
-          namespace_project_tree_path(project.namespace, project, branch)
-        ) do
-          content_tag :span, class: 'label label-gray' do
-            icon('code-fork') + ' ' + branch
-          end
-        end
-      end.join(" ").html_safe
-    end
-
-    # Returns the sorted links to tags, separated by a comma
-    def commit_tags_links(project, tags)
-      sorted = VersionSorter.rsort(tags)
-      sorted.map do |tag|
-        link_to(
-          namespace_project_commits_path(project.namespace, project,
-                                         project.repository.find_tag(tag).name)
-        ) do
-          content_tag :span, class: 'label label-gray' do
-            icon('tag') + ' ' + tag
-          end
-        end
-      end.join(" ").html_safe
-    end
-
-    def link_to_browse_code(project, commit)
-      if current_controller?(:projects, :commits)
-        if @repo.blob_at(commit.id, @path)
-          return link_to(
-            "Browse File »",
-            namespace_project_blob_path(project.namespace, project,
-                                        tree_join(commit.id, @path)),
-            class: "pull-right"
-          )
-        elsif @path.present?
-          return link_to(
-            "Browse Dir »",
-            namespace_project_tree_path(project.namespace, project,
-                                        tree_join(commit.id, @path)),
-            class: "pull-right"
-          )
-        end
-      end
-      link_to(
-        "Browse Code »",
-        namespace_project_tree_path(project.namespace, project, commit),
-        class: "pull-right"
-      )
-    end
-
-    protected
-
-    # Private: Returns a link to a person. If the person has a matching user and
-    # is a member of the current @project it will link to the team member page.
-    # Otherwise it will link to the person email as specified in the commit.
-    #
-    # options:
-    #  source: one of :author or :committer
-    #  avatar: true will prepend the avatar image
-    #  size:   size of the avatar image in px
-    def commit_person_link(commit, options = {})
-      user = commit.send(options[:source])
-      
-      source_name = clean(commit.send "#{options[:source]}_name".to_sym)
-      source_email = clean(commit.send "#{options[:source]}_email".to_sym)
-
-      person_name = user.try(:name) || source_name
-      person_email = user.try(:email) || source_email
-
-      text =
-        if options[:avatar]
-          avatar = image_tag(avatar_icon(person_email, options[:size]), class: "avatar #{"s#{options[:size]}" if options[:size]}", width: options[:size], alt: "")
-          %Q{#{avatar} <span class="commit-#{options[:source]}-name">#{person_name}</span>}
-        else
-          person_name
-        end
-
-      options = {
-        class: "commit-#{options[:source]}-link has_tooltip",
-        data: { :'original-title' => sanitize(source_email) }
-      }
-
-      if user.nil?
-        mail_to(source_email, text.html_safe, options)
-      else
-        link_to(text.html_safe, user_path(user), options)
-      end
-    end
-
-    def view_file_btn(commit_sha, diff, project)
-      link_to(
-        namespace_project_blob_path(project.namespace, project,
-                                    tree_join(commit_sha, diff.new_path)),
-        class: 'btn btn-small view-file js-view-file'
-      ) do
-        raw('View file @') + content_tag(:span, commit_sha[0..6],
-                                         class: 'commit-short-id')
-      end
-    end
-
-    def truncate_sha(sha)
-      Commit.truncate_sha(sha)
-    end
-
-    def clean(string)
-      Sanitize.clean(string, remove_contents: true)
-    end
-  end
-end
diff --git a/app/helpers/gitlab/compare_helper.rb b/app/helpers/gitlab/compare_helper.rb
deleted file mode 100644
index 407d25d3102..00000000000
--- a/app/helpers/gitlab/compare_helper.rb
+++ /dev/null
@@ -1,23 +0,0 @@
-module Gitlab
-  module CompareHelper
-    def create_mr_button?(from = params[:from], to = params[:to], project = @project)
-      from.present? &&
-        to.present? &&
-        from != to &&
-        project.merge_requests_enabled &&
-        project.repository.branch_names.include?(from) &&
-        project.repository.branch_names.include?(to)
-    end
-
-    def create_mr_path(from = params[:from], to = params[:to], project = @project)
-      new_namespace_project_merge_request_path(
-        project.namespace,
-        project,
-        merge_request: {
-          source_branch: to,
-          target_branch: from
-        }
-      )
-    end
-  end
-end
diff --git a/app/helpers/gitlab/dashboard_helper.rb b/app/helpers/gitlab/dashboard_helper.rb
deleted file mode 100644
index 2211c93999e..00000000000
--- a/app/helpers/gitlab/dashboard_helper.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-module Gitlab
-  module DashboardHelper
-    def assigned_issues_dashboard_path
-      issues_dashboard_path(assignee_id: current_user.id)
-    end
-
-    def assigned_mrs_dashboard_path
-      merge_requests_dashboard_path(assignee_id: current_user.id)
-    end
-  end
-end
diff --git a/app/helpers/gitlab/diff_helper.rb b/app/helpers/gitlab/diff_helper.rb
deleted file mode 100644
index 02907eb80f3..00000000000
--- a/app/helpers/gitlab/diff_helper.rb
+++ /dev/null
@@ -1,172 +0,0 @@
-module Gitlab
-  module DiffHelper
-    def allowed_diff_size
-      if diff_hard_limit_enabled?
-        Commit::DIFF_HARD_LIMIT_FILES
-      else
-        Commit::DIFF_SAFE_FILES
-      end
-    end
-
-    def allowed_diff_lines
-      if diff_hard_limit_enabled?
-        Commit::DIFF_HARD_LIMIT_LINES
-      else
-        Commit::DIFF_SAFE_LINES
-      end
-    end
-
-    def safe_diff_files(diffs)
-      lines = 0
-      safe_files = []
-      diffs.first(allowed_diff_size).each do |diff|
-        lines += diff.diff.lines.count
-        break if lines > allowed_diff_lines
-        safe_files << Gitlab::Diff::File.new(diff)
-      end
-      safe_files
-    end
-
-    def diff_hard_limit_enabled?
-      # Enabling hard limit allows user to see more diff information
-      if params[:force_show_diff].present?
-        true
-      else
-        false
-      end
-    end
-
-    def generate_line_code(file_path, line)
-      Gitlab::Diff::LineCode.generate(file_path, line.new_pos, line.old_pos)
-    end
-
-    def parallel_diff(diff_file, index)
-      lines = []
-      skip_next = false
-
-      # Building array of lines
-      #
-      # [
-      # left_type, left_line_number, left_line_content, left_line_code,
-      # right_line_type, right_line_number, right_line_content, right_line_code
-      # ]
-      #
-      diff_file.diff_lines.each do |line|
-
-        full_line = line.text
-        type = line.type
-        line_code = generate_line_code(diff_file.file_path, line)
-        line_new = line.new_pos
-        line_old = line.old_pos
-
-        next_line = diff_file.next_line(line.index)
-
-        if next_line
-          next_line_code = generate_line_code(diff_file.file_path, next_line)
-          next_type = next_line.type
-          next_line = next_line.text
-        end
-
-        if type == 'match' || type.nil?
-          # line in the right panel is the same as in the left one
-          line = [type, line_old, full_line, line_code, type, line_new, full_line, line_code]
-          lines.push(line)
-        elsif type == 'old'
-          if next_type == 'new'
-            # Left side has text removed, right side has text added
-            line = [type, line_old, full_line, line_code, next_type, line_new, next_line, next_line_code]
-            lines.push(line)
-            skip_next = true
-          elsif next_type == 'old' || next_type.nil?
-            # Left side has text removed, right side doesn't have any change
-            # No next line code, no new line number, no new line text
-            line = [type, line_old, full_line, line_code, next_type, nil, "&nbsp;", nil]
-            lines.push(line)
-          end
-        elsif type == 'new'
-          if skip_next
-            # Change has been already included in previous line so no need to do it again
-            skip_next = false
-            next
-          else
-            # Change is only on the right side, left side has no change
-            line = [nil, nil, "&nbsp;", line_code, type, line_new, full_line, line_code]
-            lines.push(line)
-          end
-        end
-      end
-      lines
-    end
-
-    def unfold_bottom_class(bottom)
-      (bottom) ? 'js-unfold-bottom' : ''
-    end
-
-    def unfold_class(unfold)
-      (unfold) ? 'unfold js-unfold' : ''
-    end
-
-    def diff_line_content(line)
-      if line.blank?
-        " &nbsp;"
-      else
-        line
-      end
-    end
-
-    def line_comments
-      @line_comments ||= @line_notes.select(&:active?).group_by(&:line_code)
-    end
-
-    def organize_comments(type_left, type_right, line_code_left, line_code_right)
-      comments_left = comments_right = nil
-
-      unless type_left.nil? && type_right == 'new'
-        comments_left = line_comments[line_code_left]
-      end
-
-      unless type_left.nil? && type_right.nil?
-        comments_right = line_comments[line_code_right]
-      end
-
-      [comments_left, comments_right]
-    end
-
-    def inline_diff_btn
-      params_copy = params.dup
-      params_copy[:view] = 'inline'
-      # Always use HTML to handle case where JSON diff rendered this button
-      params_copy.delete(:format)
-
-      link_to url_for(params_copy), id: "commit-diff-viewtype", class: (params[:view] != 'parallel' ? 'btn btn-sm active' : 'btn btn-sm') do
-        'Inline'
-      end
-    end
-
-    def parallel_diff_btn
-      params_copy = params.dup
-      params_copy[:view] = 'parallel'
-      # Always use HTML to handle case where JSON diff rendered this button
-      params_copy.delete(:format)
-
-      link_to url_for(params_copy), id: "commit-diff-viewtype", class: (params[:view] == 'parallel' ? 'btn active btn-sm' : 'btn btn-sm') do
-        'Side-by-side'
-      end
-    end
-
-    def submodule_link(blob, ref, repository = @repository)
-      tree, commit = submodule_links(blob, ref, repository)
-      commit_id = if commit.nil?
-                    blob.id[0..10]
-                  else
-                    link_to "#{blob.id[0..10]}", commit
-                  end
-
-      [
-        content_tag(:span, link_to(truncate(blob.name, length: 40), tree)),
-        '@',
-        content_tag(:span, commit_id, class: 'monospace'),
-      ].join(' ').html_safe
-    end
-  end
-end
diff --git a/app/helpers/gitlab/emails_helper.rb b/app/helpers/gitlab/emails_helper.rb
deleted file mode 100644
index 84f106dd536..00000000000
--- a/app/helpers/gitlab/emails_helper.rb
+++ /dev/null
@@ -1,59 +0,0 @@
-module Gitlab
-  module EmailsHelper
-
-    # Google Actions
-    # https://developers.google.com/gmail/markup/reference/go-to-action
-    def email_action(url)
-      name = action_title(url)
-      if name
-        data = {
-          "@context" => "http://schema.org",
-          "@type" => "EmailMessage",
-          "action" => {
-            "@type" => "ViewAction",
-            "name" => name,
-            "url" => url,
-            }
-          }
-
-        content_tag :script, type: 'application/ld+json' do
-          data.to_json.html_safe
-        end
-      end
-    end
-
-    def action_title(url)
-      return unless url
-      ["merge_requests", "issues", "commit"].each do |action|
-        if url.split("/").include?(action)
-          return "View #{action.humanize.singularize}"
-        end
-      end
-    end
-
-    def color_email_diff(diffcontent)
-      formatter = Rouge::Formatters::HTML.new(css_class: 'highlight', inline_theme: 'github')
-      lexer = Rouge::Lexers::Diff
-      raw formatter.format(lexer.lex(diffcontent))
-    end
-
-    def password_reset_token_valid_time
-      valid_hours = Devise.reset_password_within / 60 / 60
-      if valid_hours >= 24
-        unit = 'day'
-        valid_length = (valid_hours / 24).floor
-      else
-        unit = 'hour'
-        valid_length = valid_hours.floor
-      end
-
-      pluralize(valid_length, unit)
-    end
-
-    def reset_token_expire_message
-      link_tag = link_to('request a new one', new_user_password_url(user_email: @user.email))
-      msg = "This link is valid for #{password_reset_token_valid_time}.  "
-      msg << "After it expires, you can #{link_tag}."
-    end
-  end
-end
diff --git a/app/helpers/gitlab/events_helper.rb b/app/helpers/gitlab/events_helper.rb
deleted file mode 100644
index 65522dae533..00000000000
--- a/app/helpers/gitlab/events_helper.rb
+++ /dev/null
@@ -1,205 +0,0 @@
-module Gitlab
-  module EventsHelper
-    def link_to_author(event)
-      author = event.author
-
-      if author
-        link_to author.name, user_path(author.username)
-      else
-        event.author_name
-      end
-    end
-
-    def event_action_name(event)
-      target =  if event.target_type
-                  if event.note?
-                    event.note_target_type
-                  else
-                    event.target_type.titleize.downcase
-                  end
-                else
-                  'project'
-                end
-
-      [event.action_name, target].join(" ")
-    end
-
-    def event_filter_link(key, tooltip)
-      key = key.to_s
-      active = 'active' if @event_filter.active?(key)
-      link_opts = {
-        class: 'event_filter_link',
-        id:    "#{key}_event_filter",
-        title: "Filter by #{tooltip.downcase}",
-        data:  { toggle: 'tooltip', placement: 'top' }
-      }
-
-      content_tag :li, class: "filter_icon #{active}" do
-        link_to request.path, link_opts do
-          icon(icon_for_event[key]) + content_tag(:span, ' ' + tooltip)
-        end
-      end
-    end
-
-    def icon_for_event
-      {
-        EventFilter.push     => 'upload',
-        EventFilter.merged   => 'check-square-o',
-        EventFilter.comments => 'comments',
-        EventFilter.team     => 'user',
-      }
-    end
-
-    def event_feed_title(event)
-      words = []
-      words << event.author_name
-      words << event_action_name(event)
-
-      if event.push?
-        words << event.ref_type
-        words << event.ref_name
-        words << "at"
-      elsif event.commented?
-        if event.note_commit?
-          words << event.note_short_commit_id
-        else
-          words << "##{truncate event.note_target_iid}"
-        end
-        words << "at"
-      elsif event.target
-        words << "##{event.target_iid}:" 
-        words << event.target.title if event.target.respond_to?(:title)
-        words << "at"
-      end
-
-      words << event.project_name
-
-      words.join(" ")
-    end
-
-    def event_feed_url(event)
-      if event.issue?
-        namespace_project_issue_url(event.project.namespace, event.project,
-                                    event.issue)
-      elsif event.merge_request?
-        namespace_project_merge_request_url(event.project.namespace,
-                                            event.project, event.merge_request)
-      elsif event.note? && event.note_commit?
-        namespace_project_commit_url(event.project.namespace, event.project,
-                                     event.note_target)
-      elsif event.note?
-        if event.note_target
-          if event.note_commit?
-            namespace_project_commit_path(event.project.namespace, event.project,
-                                          event.note_commit_id,
-                                          anchor: dom_id(event.target))
-          elsif event.note_project_snippet?
-            namespace_project_snippet_path(event.project.namespace,
-                                           event.project, event.note_target)
-          else
-            event_note_target_path(event)
-          end
-        end
-      elsif event.push?
-        if event.push_with_commits? && event.md_ref?
-          if event.commits_count > 1
-            namespace_project_compare_url(event.project.namespace, event.project,
-                                          from: event.commit_from, to:
-                                          event.commit_to)
-          else
-            namespace_project_commit_url(event.project.namespace, event.project,
-                                         id: event.commit_to)
-          end
-        else
-          namespace_project_commits_url(event.project.namespace, event.project,
-                                        event.ref_name)
-        end
-      end
-    end
-
-    def event_feed_summary(event)
-      if event.issue?
-        render "events/event_issue", issue: event.issue
-      elsif event.push?
-        render "events/event_push", event: event
-      elsif event.merge_request?
-        render "events/event_merge_request", merge_request: event.merge_request
-      elsif event.note?
-        render "events/event_note", note: event.note
-      end
-    end
-
-    def event_note_target_path(event)
-      if event.note? && event.note_commit?
-        namespace_project_commit_path(event.project.namespace, event.project,
-                                      event.note_target)
-      else
-        polymorphic_path([event.project.namespace.becomes(Namespace),
-                          event.project, event.note_target],
-                         anchor: dom_id(event.target))
-      end
-    end
-
-    def event_note_title_html(event)
-      if event.note_target
-        if event.note_commit?
-          link_to(
-            namespace_project_commit_path(event.project.namespace, event.project,
-                                          event.note_commit_id,
-                                          anchor: dom_id(event.target)),
-            class: "commit_short_id"
-          ) do
-            "#{event.note_target_type} #{event.note_short_commit_id}"
-          end
-        elsif event.note_project_snippet?
-          link_to(namespace_project_snippet_path(event.project.namespace,
-                                                 event.project,
-                                                 event.note_target)) do
-            "#{event.note_target_type} ##{truncate event.note_target_id}"
-          end
-        else
-          link_to event_note_target_path(event) do
-            "#{event.note_target_type} ##{truncate event.note_target_iid}"
-          end
-        end
-      else
-        content_tag :strong do
-          "(deleted)"
-        end
-      end
-    end
-
-    def event_note(text, options = {})
-      text = first_line_in_markdown(text, 150, options)
-      sanitize(text, tags: %w(a img b pre code p span))
-    end
-
-    def event_commit_title(message)
-      escape_once(truncate(message.split("\n").first, length: 70))
-    rescue
-      "--broken encoding"
-    end
-
-    def event_to_atom(xml, event)
-      if event.proper?
-        xml.entry do
-          event_link = event_feed_url(event)
-          event_title = event_feed_title(event)
-          event_summary = event_feed_summary(event)
-
-          xml.id      "tag:#{request.host},#{event.created_at.strftime("%Y-%m-%d")}:#{event.id}"
-          xml.link    href: event_link
-          xml.title   truncate(event_title, length: 80)
-          xml.updated event.created_at.xmlschema
-          xml.media   :thumbnail, width: "40", height: "40", url: avatar_icon(event.author_email)
-          xml.author do |author|
-            xml.name event.author_name
-            xml.email event.author_email
-          end
-
-          xml.summary(type: "xhtml") { |x| x << event_summary unless event_summary.nil? }
-        end
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/explore_helper.rb b/app/helpers/gitlab/explore_helper.rb
deleted file mode 100644
index b8e0f482b94..00000000000
--- a/app/helpers/gitlab/explore_helper.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-module Gitlab
-  module ExploreHelper
-    def explore_projects_filter_path(options={})
-      exist_opts = {
-        sort: params[:sort],
-        scope: params[:scope],
-        group: params[:group],
-        tag: params[:tag],
-        visibility_level: params[:visibility_level],
-      }
-
-      options = exist_opts.merge(options)
-
-      path = explore_projects_path
-      path << "?#{options.to_param}"
-      path
-    end
-  end
-end
diff --git a/app/helpers/gitlab/external_wiki_helper.rb b/app/helpers/gitlab/external_wiki_helper.rb
deleted file mode 100644
index 710cdc727d0..00000000000
--- a/app/helpers/gitlab/external_wiki_helper.rb
+++ /dev/null
@@ -1,13 +0,0 @@
-module Gitlab
-  module ExternalWikiHelper
-    def get_project_wiki_path(project)
-      external_wiki_service = project.services.
-        select { |service| service.to_param == 'external_wiki' }.first
-      if external_wiki_service.present? && external_wiki_service.active?
-        external_wiki_service.properties['external_wiki_url']
-      else
-        namespace_project_wiki_path(project.namespace, project, :home)
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/git_helper.rb b/app/helpers/gitlab/git_helper.rb
deleted file mode 100644
index 867b30b8c74..00000000000
--- a/app/helpers/gitlab/git_helper.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-module Gitlab
-  module GitHelper
-    def strip_gpg_signature(text)
-      text.gsub(/-----BEGIN PGP SIGNATURE-----(.*)-----END PGP SIGNATURE-----/m, "")
-    end
-  end
-end
diff --git a/app/helpers/gitlab/gitlab_markdown_helper.rb b/app/helpers/gitlab/gitlab_markdown_helper.rb
deleted file mode 100644
index 265cb4672fe..00000000000
--- a/app/helpers/gitlab/gitlab_markdown_helper.rb
+++ /dev/null
@@ -1,195 +0,0 @@
-require 'nokogiri'
-
-module Gitlab
-  module GitlabMarkdownHelper
-    include Gitlab::Markdown
-    include PreferencesHelper
-
-    # Use this in places where you would normally use link_to(gfm(...), ...).
-    #
-    # It solves a problem occurring with nested links (i.e.
-    # "<a>outer text <a>gfm ref</a> more outer text</a>"). This will not be
-    # interpreted as intended. Browsers will parse something like
-    # "<a>outer text </a><a>gfm ref</a> more outer text" (notice the last part is
-    # not linked any more). link_to_gfm corrects that. It wraps all parts to
-    # explicitly produce the correct linking behavior (i.e.
-    # "<a>outer text </a><a>gfm ref</a><a> more outer text</a>").
-    def link_to_gfm(body, url, html_options = {})
-      return "" if body.blank?
-
-      escaped_body = if body =~ /\A\<img/
-                       body
-                     else
-                       escape_once(body)
-                     end
-
-      gfm_body = gfm(escaped_body, {}, html_options)
-
-      fragment = Nokogiri::XML::DocumentFragment.parse(gfm_body)
-      if fragment.children.size == 1 && fragment.children[0].name == 'a'
-        # Fragment has only one node, and it's a link generated by `gfm`.
-        # Replace it with our requested link.
-        text = fragment.children[0].text
-        fragment.children[0].replace(link_to(text, url, html_options))
-      else
-        # Traverse the fragment's first generation of children looking for pure
-        # text, wrapping anything found in the requested link
-        fragment.children.each do |node|
-          next unless node.text?
-          node.replace(link_to(node.text, url, html_options))
-        end
-      end
-
-      fragment.to_html.html_safe
-    end
-
-    MARKDOWN_OPTIONS = {
-      no_intra_emphasis:   true,
-      tables:              true,
-      fenced_code_blocks:  true,
-      strikethrough:       true,
-      lax_spacing:         true,
-      space_after_headers: true,
-      superscript:         true,
-      footnotes:           true
-    }.freeze
-
-    def markdown(text, options={})
-      unless @markdown && options == @options
-        @options = options
-
-        # see https://github.com/vmg/redcarpet#darling-i-packed-you-a-couple-renderers-for-lunch
-        rend = Redcarpet::Render::GitlabHTML.new(self, user_color_scheme_class, options)
-
-        # see https://github.com/vmg/redcarpet#and-its-like-really-simple-to-use
-        @markdown = Redcarpet::Markdown.new(rend, MARKDOWN_OPTIONS)
-      end
-
-      @markdown.render(text).html_safe
-    end
-
-    def asciidoc(text)
-      Gitlab::Asciidoc.render(text, {
-        commit: @commit,
-        project: @project,
-        project_wiki: @project_wiki,
-        requested_path: @path,
-        ref: @ref
-      })
-    end
-
-    # Return the first line of +text+, up to +max_chars+, after parsing the line
-    # as Markdown.  HTML tags in the parsed output are not counted toward the
-    # +max_chars+ limit.  If the length limit falls within a tag's contents, then
-    # the tag contents are truncated without removing the closing tag.
-    def first_line_in_markdown(text, max_chars = nil, options = {})
-      md = markdown(text, options).strip
-
-      truncate_visible(md, max_chars || md.length) if md.present?
-    end
-
-    def render_wiki_content(wiki_page)
-      case wiki_page.format
-      when :markdown
-        markdown(wiki_page.content)
-      when :asciidoc
-        asciidoc(wiki_page.content)
-      else
-        wiki_page.formatted_content.html_safe
-      end
-    end
-
-    MARKDOWN_TIPS = [
-      "End a line with two or more spaces for a line-break, or soft-return",
-      "Inline code can be denoted by `surrounding it with backticks`",
-      "Blocks of code can be denoted by three backticks ``` or four leading spaces",
-      "Emoji can be added by :emoji_name:, for example :thumbsup:",
-      "Notify other participants using @user_name",
-      "Notify a specific group using @group_name",
-      "Notify the entire team using @all",
-      "Reference an issue using a hash, for example issue #123",
-      "Reference a merge request using an exclamation point, for example MR !123",
-      "Italicize words or phrases using *asterisks* or _underscores_",
-      "Bold words or phrases using **double asterisks** or __double underscores__",
-      "Strikethrough words or phrases using ~~two tildes~~",
-      "Make a bulleted list using + pluses, - minuses, or * asterisks",
-      "Denote blockquotes using > at the beginning of a line",
-      "Make a horizontal line using three or more hyphens ---, asterisks ***, or underscores ___"
-    ].freeze
-
-    # Returns a random markdown tip for use as a textarea placeholder
-    def random_markdown_tip
-      MARKDOWN_TIPS.sample
-    end
-
-    private
-
-    # Return +text+, truncated to +max_chars+ characters, excluding any HTML
-    # tags.
-    def truncate_visible(text, max_chars)
-      doc = Nokogiri::HTML.fragment(text)
-      content_length = 0
-      truncated = false
-
-      doc.traverse do |node|
-        if node.text? || node.content.empty?
-          if truncated
-            node.remove
-            next
-          end
-
-          # Handle line breaks within a node
-          if node.content.strip.lines.length > 1
-            node.content = "#{node.content.lines.first.chomp}..."
-            truncated = true
-          end
-
-          num_remaining = max_chars - content_length
-          if node.content.length > num_remaining
-            node.content = node.content.truncate(num_remaining)
-            truncated = true
-          end
-          content_length += node.content.length
-        end
-
-        truncated = truncate_if_block(node, truncated)
-      end
-
-      doc.to_html
-    end
-
-    # Used by #truncate_visible.  If +node+ is the first block element, and the
-    # text hasn't already been truncated, then append "..." to the node contents
-    # and return true.  Otherwise return false.
-    def truncate_if_block(node, truncated)
-      if node.element? && node.description.block? && !truncated
-        node.content = "#{node.content}..." if node.next_sibling
-        true
-      else
-        truncated
-      end
-    end
-
-    # Returns the text necessary to reference `entity` across projects
-    #
-    # project - Project to reference
-    # entity  - Object that responds to `to_reference`
-    #
-    # Examples:
-    #
-    #   cross_project_reference(project, project.issues.first)
-    #   # => 'namespace1/project1#123'
-    #
-    #   cross_project_reference(project, project.merge_requests.first)
-    #   # => 'namespace1/project1!345'
-    #
-    # Returns a String
-    def cross_project_reference(project, entity)
-      if entity.respond_to?(:to_reference)
-        "#{project.to_reference}#{entity.to_reference}"
-      else
-        ''
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/gitlab_routing_helper.rb b/app/helpers/gitlab/gitlab_routing_helper.rb
deleted file mode 100644
index 7f1e455d5de..00000000000
--- a/app/helpers/gitlab/gitlab_routing_helper.rb
+++ /dev/null
@@ -1,69 +0,0 @@
-# Shorter routing method for project and project items
-# Since update to rails 4.1.9 we are now allowed to use `/` in project routing
-# so we use nested routing for project resources which include project and
-# project namespace. To avoid writing long methods every time we define shortcuts for
-# some of routing.
-#
-# For example instead of this:
-#
-#   namespace_project_merge_request_path(merge_request.project.namespace, merge_request.projects, merge_request)
-#
-# We can simply use shortcut:
-#
-#   merge_request_path(merge_request)
-#
-module Gitlab
-  module GitlabRoutingHelper
-    def project_path(project, *args)
-      namespace_project_path(project.namespace, project, *args)
-    end
-
-    def activity_project_path(project, *args)
-      activity_namespace_project_path(project.namespace, project, *args)
-    end
-
-    def edit_project_path(project, *args)
-      edit_namespace_project_path(project.namespace, project, *args)
-    end
-
-    def issue_path(entity, *args)
-      namespace_project_issue_path(entity.project.namespace, entity.project, entity, *args)
-    end
-
-    def merge_request_path(entity, *args)
-      namespace_project_merge_request_path(entity.project.namespace, entity.project, entity, *args)
-    end
-
-    def milestone_path(entity, *args)
-      namespace_project_milestone_path(entity.project.namespace, entity.project, entity, *args)
-    end
-
-    def project_url(project, *args)
-      namespace_project_url(project.namespace, project, *args)
-    end
-
-    def edit_project_url(project, *args)
-      edit_namespace_project_url(project.namespace, project, *args)
-    end
-
-    def issue_url(entity, *args)
-      namespace_project_issue_url(entity.project.namespace, entity.project, entity, *args)
-    end
-
-    def merge_request_url(entity, *args)
-      namespace_project_merge_request_url(entity.project.namespace, entity.project, entity, *args)
-    end
-
-    def project_snippet_url(entity, *args)
-      namespace_project_snippet_url(entity.project.namespace, entity.project, entity, *args)
-    end
-
-    def toggle_subscription_path(entity, *args)
-      if entity.is_a?(Issue)
-        toggle_subscription_namespace_project_issue_path(entity.project.namespace, entity.project, entity)
-      else
-        toggle_subscription_namespace_project_merge_request_path(entity.project.namespace, entity.project, entity)
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/graph_helper.rb b/app/helpers/gitlab/graph_helper.rb
deleted file mode 100644
index 047f5c19095..00000000000
--- a/app/helpers/gitlab/graph_helper.rb
+++ /dev/null
@@ -1,18 +0,0 @@
-module Gitlab
-  module GraphHelper
-    def get_refs(repo, commit)
-      refs = ""
-      refs << commit.ref_names(repo).join(' ')
-
-      # append note count
-      refs << "[#{@graph.notes[commit.id]}]" if @graph.notes[commit.id] > 0
-
-      refs
-    end
-
-    def parents_zip_spaces(parents, parent_spaces)
-      ids = parents.map { |p| p.id }
-      ids.zip(parent_spaces)
-    end
-  end
-end
diff --git a/app/helpers/gitlab/groups_helper.rb b/app/helpers/gitlab/groups_helper.rb
deleted file mode 100644
index 8172c617249..00000000000
--- a/app/helpers/gitlab/groups_helper.rb
+++ /dev/null
@@ -1,35 +0,0 @@
-module Gitlab
-  module GroupsHelper
-    def remove_user_from_group_message(group, member)
-      if member.user
-        "Are you sure you want to remove \"#{member.user.name}\" from \"#{group.name}\"?"
-      else
-        "Are you sure you want to revoke the invitation for \"#{member.invite_email}\" to join \"#{group.name}\"?"
-      end
-    end
-
-    def leave_group_message(group)
-      "Are you sure you want to leave \"#{group}\" group?"
-    end
-
-    def should_user_see_group_roles?(user, group)
-      if user
-        user.is_admin? || group.members.exists?(user_id: user.id)
-      else
-        false
-      end
-    end
-
-    def group_icon(group)
-      if group.is_a?(String)
-        group = Group.find_by(path: group)
-      end
-
-      if group && group.avatar.present?
-        group.avatar.url
-      else
-        image_path('no_group_avatar.png')
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/icons_helper.rb b/app/helpers/gitlab/icons_helper.rb
deleted file mode 100644
index e815d237bb1..00000000000
--- a/app/helpers/gitlab/icons_helper.rb
+++ /dev/null
@@ -1,87 +0,0 @@
-module Gitlab
-  module IconsHelper
-    include FontAwesome::Rails::IconHelper
-
-    # Creates an icon tag given icon name(s) and possible icon modifiers.
-    #
-    # Right now this method simply delegates directly to `fa_icon` from the
-    # font-awesome-rails gem, but should we ever use a different icon pack in the
-    # future we won't have to change hundreds of method calls.
-    def icon(names, options = {})
-      fa_icon(names, options)
-    end
-
-    def spinner(text = nil, visible = false)
-      css_class = 'loading'
-      css_class << ' hide' unless visible
-
-      content_tag :div, class: css_class do
-        icon('spinner spin') + text
-      end
-    end
-
-    def boolean_to_icon(value)
-      if value
-        icon('circle', class: 'cgreen')
-      else
-        icon('power-off', class: 'clgray')
-      end
-    end
-
-    def public_icon
-      icon('globe fw')
-    end
-
-    def internal_icon
-      icon('shield fw')
-    end
-
-    def private_icon
-      icon('lock fw')
-    end
-
-    def file_type_icon_class(type, mode, name)
-      if type == 'folder'
-        icon_class = 'folder'
-      elsif mode == '120000'
-        icon_class = 'share'
-      else
-        # Guess which icon to choose based on file extension.
-        # If you think a file extension is missing, feel free to add it on PR
-
-        case File.extname(name).downcase
-        when '.pdf'
-          icon_class = 'file-pdf-o'
-        when '.jpg', '.jpeg', '.jif', '.jfif',
-            '.jp2', '.jpx', '.j2k', '.j2c',
-            '.png', '.gif', '.tif', '.tiff',
-            '.svg', '.ico', '.bmp'
-          icon_class = 'file-image-o'
-        when '.zip', '.zipx', '.tar', '.gz', '.bz', '.bzip',
-            '.xz', '.rar', '.7z'
-          icon_class = 'file-archive-o'
-        when '.mp3', '.wma', '.ogg', '.oga', '.wav', '.flac', '.aac'
-          icon_class = 'file-audio-o'
-        when '.mp4', '.m4p', '.m4v',
-            '.mpg', '.mp2', '.mpeg', '.mpe', '.mpv',
-            '.mpg', '.mpeg', '.m2v',
-            '.avi', '.mkv', '.flv', '.ogv', '.mov',
-            '.3gp', '.3g2'
-          icon_class = 'file-video-o'
-        when '.doc', '.dot', '.docx', '.docm', '.dotx', '.dotm', '.docb'
-          icon_class = 'file-word-o'
-        when '.xls', '.xlt', '.xlm', '.xlsx', '.xlsm', '.xltx', '.xltm',
-            '.xlsb', '.xla', '.xlam', '.xll', '.xlw'
-          icon_class = 'file-excel-o'
-        when '.ppt', '.pot', '.pps', '.pptx', '.pptm', '.potx', '.potm',
-            '.ppam', '.ppsx', '.ppsm', '.sldx', '.sldm'
-          icon_class = 'file-powerpoint-o'
-        else
-          icon_class = 'file-text-o'
-        end
-      end
-
-      icon_class
-    end
-  end
-end
diff --git a/app/helpers/gitlab/issues_helper.rb b/app/helpers/gitlab/issues_helper.rb
deleted file mode 100644
index 67238926555..00000000000
--- a/app/helpers/gitlab/issues_helper.rb
+++ /dev/null
@@ -1,90 +0,0 @@
-module Gitlab
-  module IssuesHelper
-    def issue_css_classes(issue)
-      classes = "issue"
-      classes << " closed" if issue.closed?
-      classes << " today" if issue.today?
-      classes
-    end
-
-    # Returns an OpenStruct object suitable for use by <tt>options_from_collection_for_select</tt>
-    # to allow filtering issues by an unassigned User or Milestone
-    def unassigned_filter
-      # Milestone uses :title, Issue uses :name
-      OpenStruct.new(id: 0, title: 'None (backlog)', name: 'Unassigned')
-    end
-
-    def url_for_project_issues(project = @project, options = {})
-      return '' if project.nil?
-
-      if options[:only_path]
-        project.issues_tracker.project_path
-      else
-        project.issues_tracker.project_url
-      end
-    end
-
-    def url_for_new_issue(project = @project, options = {})
-      return '' if project.nil?
-
-      if options[:only_path]
-        project.issues_tracker.new_issue_path
-      else
-        project.issues_tracker.new_issue_url
-      end
-    end
-
-    def url_for_issue(issue_iid, project = @project, options = {})
-      return '' if project.nil?
-
-      if options[:only_path]
-        project.issues_tracker.issue_path(issue_iid)
-      else
-        project.issues_tracker.issue_url(issue_iid)
-      end
-    end
-
-    def bulk_update_milestone_options
-      options_for_select([['None (backlog)', -1]]) +
-          options_from_collection_for_select(project_active_milestones, 'id',
-                                             'title', params[:milestone_id])
-    end
-
-    def milestone_options(object)
-      options_from_collection_for_select(object.project.milestones.active,
-                                         'id', 'title', object.milestone_id)
-    end
-
-    def issue_box_class(item)
-      if item.respond_to?(:expired?) && item.expired?
-        'issue-box-expired'
-      elsif item.respond_to?(:merged?) && item.merged?
-        'issue-box-merged'
-      elsif item.closed?
-        'issue-box-closed'
-      else
-        'issue-box-open'
-      end
-    end
-
-    def issue_to_atom(xml, issue)
-      xml.entry do
-        xml.id      namespace_project_issue_url(issue.project.namespace,
-                                                issue.project, issue)
-        xml.link    href: namespace_project_issue_url(issue.project.namespace,
-                                                      issue.project, issue)
-        xml.title   truncate(issue.title, length: 80)
-        xml.updated issue.created_at.strftime("%Y-%m-%dT%H:%M:%SZ")
-        xml.media   :thumbnail, width: "40", height: "40", url: avatar_icon(issue.author_email)
-        xml.author do |author|
-          xml.name issue.author_name
-          xml.email issue.author_email
-        end
-        xml.summary issue.title
-      end
-    end
-
-    # Required for Gitlab::Markdown::IssueReferenceFilter
-    module_function :url_for_issue
-  end
-end
diff --git a/app/helpers/gitlab/labels_helper.rb b/app/helpers/gitlab/labels_helper.rb
deleted file mode 100644
index aa16d71f42c..00000000000
--- a/app/helpers/gitlab/labels_helper.rb
+++ /dev/null
@@ -1,103 +0,0 @@
-module Gitlab
-  module LabelsHelper
-    include ActionView::Helpers::TagHelper
-
-    # Link to a Label
-    #
-    # label   - Label object to link to
-    # project - Project object which will be used as the context for the label's
-    #           link. If omitted, defaults to `@project`, or the label's own
-    #           project.
-    # block   - An optional block that will be passed to `link_to`, forming the
-    #           body of the link element. If omitted, defaults to
-    #           `render_colored_label`.
-    #
-    # Examples:
-    #
-    #   # Allow the generated link to use the label's own project
-    #   link_to_label(label)
-    #
-    #   # Force the generated link to use @project
-    #   @project = Project.first
-    #   link_to_label(label)
-    #
-    #   # Force the generated link to use a provided project
-    #   link_to_label(label, project: Project.last)
-    #
-    #   # Customize link body with a block
-    #   link_to_label(label) { "My Custom Label Text" }
-    #
-    # Returns a String
-    def link_to_label(label, project: nil, &block)
-      project ||= @project || label.project
-      link = namespace_project_issues_path(project.namespace, project,
-                                           label_name: label.name)
-
-      if block_given?
-        link_to link, &block
-      else
-        link_to render_colored_label(label), link
-      end
-    end
-
-    def project_label_names
-      @project.labels.pluck(:title)
-    end
-
-    def render_colored_label(label)
-      label_color = label.color || Label::DEFAULT_COLOR
-      text_color = text_color_for_bg(label_color)
-
-      # Intentionally not using content_tag here so that this method can be called
-      # by LabelReferenceFilter
-      span = %(<span class="label color-label") +
-        %( style="background-color: #{label_color}; color: #{text_color}">) +
-        escape_once(label.name) + '</span>'
-
-      span.html_safe
-    end
-
-    def suggested_colors
-      [
-        '#0033CC',
-        '#428BCA',
-        '#44AD8E',
-        '#A8D695',
-        '#5CB85C',
-        '#69D100',
-        '#004E00',
-        '#34495E',
-        '#7F8C8D',
-        '#A295D6',
-        '#5843AD',
-        '#8E44AD',
-        '#FFECDB',
-        '#AD4363',
-        '#D10069',
-        '#CC0033',
-        '#FF0000',
-        '#D9534F',
-        '#D1D100',
-        '#F0AD4E',
-        '#AD8D43'
-      ]
-    end
-
-    def text_color_for_bg(bg_color)
-      r, g, b = bg_color.slice(1,7).scan(/.{2}/).map(&:hex)
-
-      if (r + g + b) > 500
-        '#333333'
-      else
-        '#FFFFFF'
-      end
-    end
-
-    def project_labels_options(project)
-      options_from_collection_for_select(project.labels, 'name', 'name', params[:label_name])
-    end
-
-    # Required for Gitlab::Markdown::LabelReferenceFilter
-    module_function :render_colored_label, :text_color_for_bg, :escape_once
-  end
-end
diff --git a/app/helpers/gitlab/merge_requests_helper.rb b/app/helpers/gitlab/merge_requests_helper.rb
deleted file mode 100644
index 361f6b2fdac..00000000000
--- a/app/helpers/gitlab/merge_requests_helper.rb
+++ /dev/null
@@ -1,76 +0,0 @@
-module Gitlab
-  module MergeRequestsHelper
-    def new_mr_path_from_push_event(event)
-      target_project = event.project.forked_from_project || event.project
-      new_namespace_project_merge_request_path(
-        event.project.namespace,
-        event.project,
-        new_mr_from_push_event(event, target_project)
-      )
-    end
-
-    def new_mr_path_for_fork_from_push_event(event)
-      new_namespace_project_merge_request_path(
-        event.project.namespace,
-        event.project,
-        new_mr_from_push_event(event, event.project.forked_from_project)
-      )
-    end
-
-    def new_mr_from_push_event(event, target_project)
-      {
-        merge_request: {
-          source_project_id: event.project.id,
-          target_project_id: target_project.id,
-          source_branch: event.branch_name,
-          target_branch: target_project.repository.root_ref
-        }
-      }
-    end
-
-    def mr_css_classes(mr)
-      classes = "merge-request"
-      classes << " closed" if mr.closed?
-      classes << " merged" if mr.merged?
-      classes
-    end
-
-    def ci_build_details_path(merge_request)
-      merge_request.source_project.ci_service.build_page(merge_request.last_commit.sha, merge_request.source_branch)
-    end
-
-    def merge_path_description(merge_request, separator)
-      if merge_request.for_fork?
-        "Project:Branches: #{@merge_request.source_project_path}:#{@merge_request.source_branch} #{separator} #{@merge_request.target_project.path_with_namespace}:#{@merge_request.target_branch}"
-      else
-        "Branches: #{@merge_request.source_branch} #{separator} #{@merge_request.target_branch}"
-      end
-    end
-
-    def issues_sentence(issues)
-      issues.map { |i| "##{i.iid}" }.to_sentence
-    end
-
-    def mr_change_branches_path(merge_request)
-      new_namespace_project_merge_request_path(
-        @project.namespace, @project,
-        merge_request: {
-          source_project_id: @merge_request.source_project_id,
-          target_project_id: @merge_request.target_project_id,
-          source_branch: @merge_request.source_branch,
-          target_branch: nil
-        }
-      )
-    end
-
-    def source_branch_with_namespace(merge_request)
-      if merge_request.for_fork?
-        namespace = link_to(merge_request.source_project_namespace,
-          project_path(merge_request.source_project))
-        namespace + ":#{merge_request.source_branch}"
-      else
-        merge_request.source_branch
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/milestones_helper.rb b/app/helpers/gitlab/milestones_helper.rb
deleted file mode 100644
index 116967d4946..00000000000
--- a/app/helpers/gitlab/milestones_helper.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-module Gitlab
-  module MilestonesHelper
-    def milestones_filter_path(opts = {})
-      if @project
-        namespace_project_milestones_path(@project.namespace, @project, opts)
-      elsif @group
-        group_milestones_path(@group, opts)
-      else
-        dashboard_milestones_path(opts)
-      end
-    end
-
-    def milestone_progress_bar(milestone)
-      options = {
-        class: 'progress-bar progress-bar-success',
-        style: "width: #{milestone.percent_complete}%;"
-      }
-
-      content_tag :div, class: 'progress' do
-        content_tag :div, nil, options
-      end
-    end
-
-    def projects_milestones_options
-      milestones =
-        if @project
-          @project.milestones
-        else
-          Milestone.where(project_id: @projects)
-        end.active
-
-      grouped_milestones = Milestones::GroupService.new(milestones).execute
-      grouped_milestones.unshift(Milestone::None)
-
-      options_from_collection_for_select(grouped_milestones, 'title', 'title', params[:milestone_title])
-    end
-  end
-end
diff --git a/app/helpers/gitlab/namespaces_helper.rb b/app/helpers/gitlab/namespaces_helper.rb
deleted file mode 100644
index b1caaac3f63..00000000000
--- a/app/helpers/gitlab/namespaces_helper.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-module Gitlab
-  module NamespacesHelper
-    def namespaces_options(selected = :current_user, scope = :default)
-      groups = current_user.owned_groups + current_user.masters_groups
-      users = [current_user.namespace]
-
-      group_opts = ["Groups", groups.sort_by(&:human_name).map {|g| [g.human_name, g.id]} ]
-      users_opts = [ "Users", users.sort_by(&:human_name).map {|u| [u.human_name, u.id]} ]
-
-      options = []
-      options << group_opts
-      options << users_opts
-
-      if selected == :current_user && current_user.namespace
-        selected = current_user.namespace.id
-      end
-
-      grouped_options_for_select(options, selected)
-    end
-
-    def namespace_select_tag(id, opts = {})
-      css_class = "ajax-namespace-select "
-      css_class << "multiselect " if opts[:multiple]
-      css_class << (opts[:class] || '')
-      value = opts[:selected] || ''
-
-      hidden_field_tag(id, value, class: css_class)
-    end
-
-    def namespace_icon(namespace, size = 40)
-      if namespace.kind_of?(Group)
-        group_icon(namespace)
-      else
-        avatar_icon(namespace.owner.email, size)
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/nav_helper.rb b/app/helpers/gitlab/nav_helper.rb
deleted file mode 100644
index 14106d70840..00000000000
--- a/app/helpers/gitlab/nav_helper.rb
+++ /dev/null
@@ -1,23 +0,0 @@
-module Gitlab
-  module NavHelper
-    def nav_menu_collapsed?
-      cookies[:collapsed_nav] == 'true'
-    end
-
-    def nav_sidebar_class
-      if nav_menu_collapsed?
-        "page-sidebar-collapsed"
-      else
-        "page-sidebar-expanded"
-      end
-    end
-
-    def nav_header_class
-      if nav_menu_collapsed?
-        "header-collapsed"
-      else
-        "header-expanded"
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/notes_helper.rb b/app/helpers/gitlab/notes_helper.rb
deleted file mode 100644
index 15076148b02..00000000000
--- a/app/helpers/gitlab/notes_helper.rb
+++ /dev/null
@@ -1,78 +0,0 @@
-module Gitlab
-  module NotesHelper
-    # Helps to distinguish e.g. commit notes in mr notes list
-    def note_for_main_target?(note)
-      (@noteable.class.name == note.noteable_type && !note.for_diff_line?)
-    end
-
-    def note_target_fields(note)
-      hidden_field_tag(:target_type, note.noteable.class.name.underscore) +
-      hidden_field_tag(:target_id, note.noteable.id)
-    end
-
-    def note_editable?(note)
-      note.editable? && can?(current_user, :admin_note, note)
-    end
-
-    def link_to_commit_diff_line_note(note)
-      if note.for_commit_diff_line?
-        link_to(
-          "#{note.diff_file_name}:L#{note.diff_new_line}",
-          namespace_project_commit_path(@project.namespace, @project,
-                                        note.noteable, anchor: note.line_code)
-        )
-      end
-    end
-
-    def noteable_json(noteable)
-      {
-        id: noteable.id,
-        class: noteable.class.name,
-        resources: noteable.class.table_name,
-        project_id: noteable.project.id,
-      }.to_json
-    end
-
-    def link_to_new_diff_note(line_code, line_type = nil)
-      discussion_id = Note.build_discussion_id(
-        @comments_target[:noteable_type],
-        @comments_target[:noteable_id] || @comments_target[:commit_id],
-        line_code
-      )
-
-      data = {
-        noteable_type: @comments_target[:noteable_type],
-        noteable_id:   @comments_target[:noteable_id],
-        commit_id:     @comments_target[:commit_id],
-        line_code:     line_code,
-        discussion_id: discussion_id,
-        line_type:     line_type
-      }
-
-      button_tag(class: 'btn add-diff-note js-add-diff-note-button',
-                 data: data,
-                 title: 'Add a comment to this line') do
-        icon('comment-o')
-      end
-    end
-
-    def link_to_reply_diff(note, line_type = nil)
-      return unless current_user
-
-      data = {
-        noteable_type: note.noteable_type,
-        noteable_id:   note.noteable_id,
-        commit_id:     note.commit_id,
-        line_code:     note.line_code,
-        discussion_id: note.discussion_id,
-        line_type:     line_type
-      }
-
-      button_tag class: 'btn reply-btn js-discussion-reply-button',
-                 data: data, title: 'Add a reply' do
-        link_text = icon('comment')
-        link_text << ' Reply'
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/notifications_helper.rb b/app/helpers/gitlab/notifications_helper.rb
deleted file mode 100644
index b6324044ab1..00000000000
--- a/app/helpers/gitlab/notifications_helper.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-module Gitlab
-  module NotificationsHelper
-    include IconsHelper
-
-    def notification_icon(notification)
-      if notification.disabled?
-        icon('volume-off', class: 'ns-mute')
-      elsif notification.participating?
-        icon('volume-down', class: 'ns-part')
-      elsif notification.watch?
-        icon('volume-up', class: 'ns-watch')
-      else
-        icon('circle-o', class: 'ns-default')
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/page_layout_helper.rb b/app/helpers/gitlab/page_layout_helper.rb
deleted file mode 100644
index c89b2c2ba2c..00000000000
--- a/app/helpers/gitlab/page_layout_helper.rb
+++ /dev/null
@@ -1,37 +0,0 @@
-module Gitlab
-  module PageLayoutHelper
-    def page_title(*titles)
-      @page_title ||= []
-
-      @page_title.push(*titles.compact) if titles.any?
-
-      @page_title.join(" | ")
-    end
-
-    def header_title(title = nil, title_url = nil)
-      if title
-        @header_title     = title
-        @header_title_url = title_url
-      else
-        @header_title_url ? link_to(@header_title, @header_title_url) : @header_title
-      end
-    end
-
-    def sidebar(name = nil)
-      if name
-        @sidebar = name
-      else
-        @sidebar
-      end
-    end
-
-    def fluid_layout(enabled = false)
-      if @fluid_layout.nil?
-        @fluid_layout = enabled
-      else
-        @fluid_layout
-      end
-    end
-  end
-
-end
diff --git a/app/helpers/gitlab/preferences_helper.rb b/app/helpers/gitlab/preferences_helper.rb
deleted file mode 100644
index 3eac5d51acd..00000000000
--- a/app/helpers/gitlab/preferences_helper.rb
+++ /dev/null
@@ -1,67 +0,0 @@
-module Gitlab
-  # Helper methods for per-User preferences
-  module PreferencesHelper
-    COLOR_SCHEMES = {
-      1 => 'white',
-      2 => 'dark',
-      3 => 'solarized-light',
-      4 => 'solarized-dark',
-      5 => 'monokai',
-    }
-    COLOR_SCHEMES.default = 'white'
-
-    # Helper method to access the COLOR_SCHEMES
-    #
-    # The keys are the `color_scheme_ids`
-    # The values are the `name` of the scheme.
-    #
-    # The preview images are `name-scheme-preview.png`
-    # The stylesheets should use the css class `.name`
-    def color_schemes
-      COLOR_SCHEMES.freeze
-    end
-
-    # Maps `dashboard` values to more user-friendly option text
-    DASHBOARD_CHOICES = {
-      projects: 'Your Projects (default)',
-      stars:    'Starred Projects'
-    }.with_indifferent_access.freeze
-
-    # Returns an Array usable by a select field for more user-friendly option text
-    def dashboard_choices
-      defined = User.dashboards
-
-      if defined.size != DASHBOARD_CHOICES.size
-        # Ensure that anyone adding new options updates this method too
-        raise RuntimeError, "`User` defines #{defined.size} dashboard choices," +
-          " but `DASHBOARD_CHOICES` defined #{DASHBOARD_CHOICES.size}."
-      else
-        defined.map do |key, _|
-          # Use `fetch` so `KeyError` gets raised when a key is missing
-          [DASHBOARD_CHOICES.fetch(key), key]
-        end
-      end
-    end
-
-    def project_view_choices
-      [
-        ['Readme (default)', :readme],
-        ['Activity view', :activity]
-      ]
-    end
-
-    def user_application_theme
-      theme = Gitlab::Themes.by_id(current_user.try(:theme_id))
-      theme.css_class
-    end
-
-    def user_color_scheme_class
-      COLOR_SCHEMES[current_user.try(:color_scheme_id)] if defined?(current_user)
-    end
-
-    def prefer_readme?
-      !current_user ||
-        current_user.project_view == 'readme'
-    end
-  end
-end
diff --git a/app/helpers/gitlab/projects_helper.rb b/app/helpers/gitlab/projects_helper.rb
deleted file mode 100644
index 8a8cd6048df..00000000000
--- a/app/helpers/gitlab/projects_helper.rb
+++ /dev/null
@@ -1,332 +0,0 @@
-module Gitlab
-  module ProjectsHelper
-    def remove_from_project_team_message(project, member)
-      if member.user
-        "You are going to remove #{member.user.name} from #{project.name} project team. Are you sure?"
-      else
-        "You are going to revoke the invitation for #{member.invite_email} to join #{project.name} project team. Are you sure?"
-      end
-    end
-
-    def link_to_project(project)
-      link_to [project.namespace.becomes(Namespace), project] do
-        title = content_tag(:span, project.name, class: 'project-name')
-
-        if project.namespace
-          namespace = content_tag(:span, "#{project.namespace.human_name} / ", class: 'namespace-name')
-          title = namespace + title
-        end
-
-        title
-      end
-    end
-
-    def link_to_member(project, author, opts = {})
-      default_opts = { avatar: true, name: true, size: 16, author_class: 'author' }
-      opts = default_opts.merge(opts)
-
-      return "(deleted)" unless author
-
-      author_html =  ""
-
-      # Build avatar image tag
-      author_html << image_tag(avatar_icon(author.try(:email), opts[:size]), width: opts[:size], class: "avatar avatar-inline #{"s#{opts[:size]}" if opts[:size]}", alt:'') if opts[:avatar]
-
-      # Build name span tag
-      author_html << content_tag(:span, sanitize(author.name), class: opts[:author_class]) if opts[:name]
-
-      author_html = author_html.html_safe
-
-      if opts[:name]
-        link_to(author_html, user_path(author), class: "author_link").html_safe
-      else
-        link_to(author_html, user_path(author), class: "author_link has_tooltip", data: { :'original-title' => sanitize(author.name) } ).html_safe
-      end
-    end
-
-    def project_title(project)
-      if project.group
-        content_tag :span do
-          link_to(
-            simple_sanitize(project.group.name), group_path(project.group)
-          ) + ' / ' +
-            link_to(simple_sanitize(project.name),
-                    project_path(project))
-        end
-      else
-        owner = project.namespace.owner
-        content_tag :span do
-          link_to(
-            simple_sanitize(owner.name), user_path(owner)
-          ) + ' / ' +
-            link_to(simple_sanitize(project.name),
-                    project_path(project))
-        end
-      end
-    end
-
-    def remove_project_message(project)
-      "You are going to remove #{project.name_with_namespace}.\n Removed project CANNOT be restored!\n Are you ABSOLUTELY sure?"
-    end
-
-    def transfer_project_message(project)
-      "You are going to transfer #{project.name_with_namespace} to another owner. Are you ABSOLUTELY sure?"
-    end
-
-    def project_nav_tabs
-      @nav_tabs ||= get_project_nav_tabs(@project, current_user)
-    end
-
-    def project_nav_tab?(name)
-      project_nav_tabs.include? name
-    end
-
-    def project_active_milestones
-      @project.milestones.active.order("due_date, title ASC")
-    end
-
-    def project_for_deploy_key(deploy_key)
-      if deploy_key.projects.include?(@project)
-        @project
-      else
-        deploy_key.projects.find { |project| can?(current_user, :read_project, project) }
-      end
-    end
-
-    def can_change_visibility_level?(project, current_user)
-      return false unless can?(current_user, :change_visibility_level, project)
-
-      if project.forked?
-        project.forked_from_project.visibility_level > Gitlab::VisibilityLevel::PRIVATE
-      else
-        true
-      end
-    end
-
-    private
-
-    def get_project_nav_tabs(project, current_user)
-      nav_tabs = [:home]
-
-      if !project.empty_repo? && can?(current_user, :download_code, project)
-        nav_tabs << [:files, :commits, :network, :graphs]
-      end
-
-      if project.repo_exists? && can?(current_user, :read_merge_request, project)
-        nav_tabs << :merge_requests
-      end
-
-      if can?(current_user, :admin_project, project)
-        nav_tabs << :settings
-      end
-
-      if can?(current_user, :read_issue, project)
-        nav_tabs << :issues
-      end
-
-      if can?(current_user, :read_wiki, project)
-        nav_tabs << :wiki
-      end
-
-      if can?(current_user, :read_project_snippet, project)
-        nav_tabs << :snippets
-      end
-
-      if can?(current_user, :read_label, project)
-        nav_tabs << :labels
-      end
-
-      if can?(current_user, :read_milestone, project)
-        nav_tabs << :milestones
-      end
-
-      nav_tabs.flatten
-    end
-
-    def git_user_name
-      if current_user
-        current_user.name
-      else
-        "Your name"
-      end
-    end
-
-    def git_user_email
-      if current_user
-        current_user.email
-      else
-        "your@email.com"
-      end
-    end
-
-    def repository_size(project = nil)
-      "#{(project || @project).repository_size} MB"
-    rescue
-      # In order to prevent 500 error
-      # when application cannot allocate memory
-      # to calculate repo size - just show 'Unknown'
-      'unknown'
-    end
-
-    def default_url_to_repo(project = nil)
-      project = project || @project
-      current_user ? project.url_to_repo : project.http_url_to_repo
-    end
-
-    def default_clone_protocol
-      current_user ? "ssh" : "http"
-    end
-
-    def project_last_activity(project)
-      if project.last_activity_at
-        time_ago_with_tooltip(project.last_activity_at, placement: 'bottom', html_class: 'last_activity_time_ago')
-      else
-        "Never"
-      end
-    end
-
-    def add_contribution_guide_path(project)
-      if project && !project.repository.contribution_guide
-        namespace_project_new_blob_path(
-          project.namespace,
-          project,
-          project.default_branch,
-          file_name:      "CONTRIBUTING.md",
-          commit_message: "Add contribution guide"
-        )
-      end
-    end
-
-    def add_changelog_path(project)
-      if project && !project.repository.changelog
-        namespace_project_new_blob_path(
-          project.namespace,
-          project,
-          project.default_branch,
-          file_name:      "CHANGELOG",
-          commit_message: "Add changelog"
-        )
-      end
-    end
-
-    def add_license_path(project)
-      if project && !project.repository.license
-        namespace_project_new_blob_path(
-          project.namespace,
-          project,
-          project.default_branch,
-          file_name:      "LICENSE",
-          commit_message: "Add license"
-        )
-      end
-    end
-
-    def contribution_guide_path(project)
-      if project && contribution_guide = project.repository.contribution_guide
-        namespace_project_blob_path(
-          project.namespace,
-          project,
-          tree_join(project.default_branch,
-                    contribution_guide.name)
-        )
-      end
-    end
-
-    def readme_path(project)
-      filename_path(project, :readme)
-    end
-
-    def changelog_path(project)
-      filename_path(project, :changelog)
-    end
-
-    def license_path(project)
-      filename_path(project, :license)
-    end
-
-    def version_path(project)
-      filename_path(project, :version)
-    end
-
-    def hidden_pass_url(original_url)
-      result = URI(original_url)
-      result.password = '*****' unless result.password.nil?
-      result
-    rescue
-      original_url
-    end
-
-    def project_wiki_path_with_version(proj, page, version, is_newest)
-      url_params = is_newest ? {} : { version_id: version }
-      namespace_project_wiki_path(proj.namespace, proj, page, url_params)
-    end
-
-    def project_status_css_class(status)
-      case status
-      when "started"
-        "active"
-      when "failed"
-        "danger"
-      when "finished"
-        "success"
-      end
-    end
-
-    def user_max_access_in_project(user, project)
-      level = project.team.max_member_access(user)
-
-      if level
-        Gitlab::Access.options_with_owner.key(level)
-      end
-    end
-
-    def leave_project_message(project)
-      "Are you sure you want to leave \"#{project.name}\" project?"
-    end
-
-    def new_readme_path
-      ref = @repository.root_ref if @repository
-      ref ||= 'master'
-
-      namespace_project_new_blob_path(@project.namespace, @project, tree_join(ref), file_name: 'README.md')
-    end
-
-    def last_push_event
-      if current_user
-        current_user.recent_push(@project.id)
-      end
-    end
-
-    def readme_cache_key
-      sha = @project.commit.try(:sha) || 'nil'
-      [@project.id, sha, "readme"].join('-')
-    end
-
-    def round_commit_count(project)
-      count = project.commit_count
-
-      if count > 10000
-        '10000+'
-      elsif count > 5000
-        '5000+'
-      elsif count > 1000
-        '1000+'
-      else
-        count
-      end
-    end
-
-    private
-
-    def filename_path(project, filename)
-      if project && blob = project.repository.send(filename)
-        namespace_project_blob_path(
-            project.namespace,
-            project,
-            tree_join(project.default_branch,
-                      blob.name)
-        )
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/search_helper.rb b/app/helpers/gitlab/search_helper.rb
deleted file mode 100644
index f9caf8f2431..00000000000
--- a/app/helpers/gitlab/search_helper.rb
+++ /dev/null
@@ -1,114 +0,0 @@
-module Gitlab
-  module SearchHelper
-    def search_autocomplete_opts(term)
-      return unless current_user
-
-      resources_results = [
-        groups_autocomplete(term),
-        projects_autocomplete(term)
-      ].flatten
-
-      generic_results = project_autocomplete + default_autocomplete + help_autocomplete
-      generic_results.select! { |result| result[:label] =~ Regexp.new(term, "i") }
-
-      [
-        resources_results,
-        generic_results
-      ].flatten.uniq do |item|
-        item[:label]
-      end
-    end
-
-    private
-
-    # Autocomplete results for various settings pages
-    def default_autocomplete
-      [
-        { label: "Profile settings", url: profile_path },
-        { label: "SSH Keys",         url: profile_keys_path },
-        { label: "Dashboard",        url: root_path },
-        { label: "Admin Section",       url: admin_root_path },
-      ]
-    end
-
-    # Autocomplete results for internal help pages
-    def help_autocomplete
-      [
-        { label: "help: API Help",           url: help_page_path("api", "README") },
-        { label: "help: Markdown Help",      url: help_page_path("markdown", "markdown") },
-        { label: "help: Permissions Help",   url: help_page_path("permissions", "permissions") },
-        { label: "help: Public Access Help", url: help_page_path("public_access", "public_access") },
-        { label: "help: Rake Tasks Help",    url: help_page_path("raketasks", "README") },
-        { label: "help: SSH Keys Help",      url: help_page_path("ssh", "README") },
-        { label: "help: System Hooks Help",  url: help_page_path("system_hooks", "system_hooks") },
-        { label: "help: Web Hooks Help",     url: help_page_path("web_hooks", "web_hooks") },
-        { label: "help: Workflow Help",      url: help_page_path("workflow", "README") },
-      ]
-    end
-
-    # Autocomplete results for the current project, if it's defined
-    def project_autocomplete
-      if @project && @project.repository.exists? && @project.repository.root_ref
-        prefix = search_result_sanitize(@project.name_with_namespace)
-        ref    = @ref || @project.repository.root_ref
-
-        [
-          { label: "#{prefix} - Files",          url: namespace_project_tree_path(@project.namespace, @project, ref) },
-          { label: "#{prefix} - Commits",        url: namespace_project_commits_path(@project.namespace, @project, ref) },
-          { label: "#{prefix} - Network",        url: namespace_project_network_path(@project.namespace, @project, ref) },
-          { label: "#{prefix} - Graph",          url: namespace_project_graph_path(@project.namespace, @project, ref) },
-          { label: "#{prefix} - Issues",         url: namespace_project_issues_path(@project.namespace, @project) },
-          { label: "#{prefix} - Merge Requests", url: namespace_project_merge_requests_path(@project.namespace, @project) },
-          { label: "#{prefix} - Milestones",     url: namespace_project_milestones_path(@project.namespace, @project) },
-          { label: "#{prefix} - Snippets",       url: namespace_project_snippets_path(@project.namespace, @project) },
-          { label: "#{prefix} - Members",        url: namespace_project_project_members_path(@project.namespace, @project) },
-          { label: "#{prefix} - Wiki",           url: namespace_project_wikis_path(@project.namespace, @project) },
-        ]
-      else
-        []
-      end
-    end
-
-    # Autocomplete results for the current user's groups
-    def groups_autocomplete(term, limit = 5)
-      current_user.authorized_groups.search(term).limit(limit).map do |group|
-        {
-          label: "group: #{search_result_sanitize(group.name)}",
-          url: group_path(group)
-        }
-      end
-    end
-
-    # Autocomplete results for the current user's projects
-    def projects_autocomplete(term, limit = 5)
-      ProjectsFinder.new.execute(current_user).search_by_title(term).
-        sorted_by_stars.non_archived.limit(limit).map do |p|
-        {
-          label: "project: #{search_result_sanitize(p.name_with_namespace)}",
-          url: namespace_project_path(p.namespace, p)
-        }
-      end
-    end
-
-    def search_result_sanitize(str)
-      Sanitize.clean(str)
-    end
-
-    def search_filter_path(options={})
-      exist_opts = {
-        search: params[:search],
-        project_id: params[:project_id],
-        group_id: params[:group_id],
-        scope: params[:scope]
-      }
-
-      options = exist_opts.merge(options)
-      search_path(options)
-    end
-
-    # Sanitize html generated after parsing markdown from issue description or comment
-    def search_md_sanitize(html)
-      sanitize(html, tags: %w(a p ol ul li pre code))
-    end
-  end
-end
diff --git a/app/helpers/gitlab/selects_helper.rb b/app/helpers/gitlab/selects_helper.rb
deleted file mode 100644
index d52d670a1cf..00000000000
--- a/app/helpers/gitlab/selects_helper.rb
+++ /dev/null
@@ -1,47 +0,0 @@
-module Gitlab
-  module SelectsHelper
-    def users_select_tag(id, opts = {})
-      css_class = "ajax-users-select "
-      css_class << "multiselect " if opts[:multiple]
-      css_class << (opts[:class] || '')
-      value = opts[:selected] || ''
-      placeholder = opts[:placeholder] || 'Search for a user'
-
-      null_user = opts[:null_user] || false
-      any_user = opts[:any_user] || false
-      email_user = opts[:email_user] || false
-      first_user = opts[:first_user] && current_user ? current_user.username : false
-      current_user = opts[:current_user] || false
-      project = opts[:project] || @project
-
-      html = {
-        class: css_class,
-        'data-placeholder' => placeholder,
-        'data-null-user' => null_user,
-        'data-any-user' => any_user,
-        'data-email-user' => email_user,
-        'data-first-user' => first_user,
-        'data-current-user' => current_user
-      }
-
-      unless opts[:scope] == :all
-        if project
-          html['data-project-id'] = project.id
-        elsif @group
-          html['data-group-id'] = @group.id
-        end
-      end
-
-      hidden_field_tag(id, value, html)
-    end
-
-    def groups_select_tag(id, opts = {})
-      css_class = "ajax-groups-select "
-      css_class << "multiselect " if opts[:multiple]
-      css_class << (opts[:class] || '')
-      value = opts[:selected] || ''
-
-      hidden_field_tag(id, value, class: css_class)
-    end
-  end
-end
diff --git a/app/helpers/gitlab/snippets_helper.rb b/app/helpers/gitlab/snippets_helper.rb
deleted file mode 100644
index aaf4d43f852..00000000000
--- a/app/helpers/gitlab/snippets_helper.rb
+++ /dev/null
@@ -1,22 +0,0 @@
-module Gitlab
-  module SnippetsHelper
-    def lifetime_select_options
-      options = [
-          ['forever', nil],
-          ['1 day',   "#{Date.current + 1.day}"],
-          ['1 week',  "#{Date.current + 1.week}"],
-          ['1 month', "#{Date.current + 1.month}"]
-      ]
-      options_for_select(options)
-    end
-
-    def reliable_snippet_path(snippet)
-      if snippet.project_id?
-        namespace_project_snippet_path(snippet.project.namespace,
-                                       snippet.project, snippet)
-      else
-        snippet_path(snippet)
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/sorting_helper.rb b/app/helpers/gitlab/sorting_helper.rb
deleted file mode 100644
index 29c63a0d129..00000000000
--- a/app/helpers/gitlab/sorting_helper.rb
+++ /dev/null
@@ -1,98 +0,0 @@
-module Gitlab
-  module SortingHelper
-    def sort_options_hash
-      {
-        sort_value_name => sort_title_name,
-        sort_value_recently_updated => sort_title_recently_updated,
-        sort_value_oldest_updated => sort_title_oldest_updated,
-        sort_value_recently_created => sort_title_recently_created,
-        sort_value_oldest_created => sort_title_oldest_created,
-        sort_value_milestone_soon => sort_title_milestone_soon,
-        sort_value_milestone_later => sort_title_milestone_later,
-        sort_value_largest_repo => sort_title_largest_repo,
-        sort_value_recently_signin => sort_title_recently_signin,
-        sort_value_oldest_signin => sort_title_oldest_signin,
-      }
-    end
-
-    def sort_title_oldest_updated
-      'Oldest updated'
-    end
-
-    def sort_title_recently_updated
-      'Recently updated'
-    end
-
-    def sort_title_oldest_created
-      'Oldest created'
-    end
-
-    def sort_title_recently_created
-      'Recently created'
-    end
-
-    def sort_title_milestone_soon
-      'Milestone due soon'
-    end
-
-    def sort_title_milestone_later
-      'Milestone due later'
-    end
-
-    def sort_title_name
-      'Name'
-    end
-
-    def sort_title_largest_repo
-      'Largest repository'
-    end
-
-    def sort_title_recently_signin
-      'Recent sign in'
-    end
-
-    def sort_title_oldest_signin
-      'Oldest sign in'
-    end
-
-    def sort_value_oldest_updated
-      'updated_asc'
-    end
-
-    def sort_value_recently_updated
-      'updated_desc'
-    end
-
-    def sort_value_oldest_created
-      'created_asc'
-    end
-
-    def sort_value_recently_created
-      'created_desc'
-    end
-
-    def sort_value_milestone_soon
-      'milestone_due_asc'
-    end
-
-    def sort_value_milestone_later
-      'milestone_due_desc'
-    end
-
-    def sort_value_name
-      'name_asc'
-    end
-
-    def sort_value_largest_repo
-      'repository_size_desc'
-    end
-
-    def sort_value_recently_signin
-      'recent_sign_in'
-    end
-
-    def sort_value_oldest_signin
-      'oldest_sign_in'
-    end
-  end
-end
diff --git a/app/helpers/gitlab/submodule_helper.rb b/app/helpers/gitlab/submodule_helper.rb
deleted file mode 100644
index c0fbebcb1d9..00000000000
--- a/app/helpers/gitlab/submodule_helper.rb
+++ /dev/null
@@ -1,76 +0,0 @@
-module Gitlab
-  module SubmoduleHelper
-    include Gitlab::ShellAdapter
-
-    # links to files listing for submodule if submodule is a project on this server
-    def submodule_links(submodule_item, ref = nil, repository = @repository)
-      url = repository.submodule_url_for(ref, submodule_item.path)
-
-      return url, nil unless url =~ /([^\/:]+)\/([^\/]+\.git)\Z/
-
-      namespace = $1
-      project = $2
-      project.chomp!('.git')
-
-      if self_url?(url, namespace, project)
-        return namespace_project_path(namespace, project),
-          namespace_project_tree_path(namespace, project,
-                                      submodule_item.id)
-      elsif relative_self_url?(url)
-        relative_self_links(url, submodule_item.id)
-      elsif github_dot_com_url?(url)
-        standard_links('github.com', namespace, project, submodule_item.id)
-      elsif gitlab_dot_com_url?(url)
-        standard_links('gitlab.com', namespace, project, submodule_item.id)
-      else
-        return url, nil
-      end
-    end
-
-    protected
-
-    def github_dot_com_url?(url)
-      url =~ /github\.com[\/:][^\/]+\/[^\/]+\Z/
-    end
-
-    def gitlab_dot_com_url?(url)
-      url =~ /gitlab\.com[\/:][^\/]+\/[^\/]+\Z/
-    end
-
-    def self_url?(url, namespace, project)
-      return true if url == [ Gitlab.config.gitlab.url, '/', namespace, '/',
-                              project, '.git' ].join('')
-      url == gitlab_shell.url_to_repo([namespace, '/', project].join(''))
-    end
-
-    def relative_self_url?(url)
-      # (./)?(../repo.git) || (./)?(../../project/repo.git) )
-      url =~ /\A((\.\/)?(\.\.\/))(?!(\.\.)|(.*\/)).*\.git\z/ || url =~ /\A((\.\/)?(\.\.\/){2})(?!(\.\.))([^\/]*)\/(?!(\.\.)|(.*\/)).*\.git\z/
-    end
-
-    def standard_links(host, namespace, project, commit)
-      base = [ 'https://', host, '/', namespace, '/', project ].join('')
-      [base, [ base, '/tree/', commit ].join('')]
-    end
-
-    def relative_self_links(url, commit)
-      # Map relative links to a namespace and project
-      # For example:
-      # ../bar.git -> same namespace, repo bar
-      # ../foo/bar.git -> namespace foo, repo bar
-      # ../../foo/bar/baz.git -> namespace bar, repo baz
-      components = url.split('/')
-      base = components.pop.gsub(/.git$/, '')
-      namespace = components.pop.gsub(/^\.\.$/, '')
-
-      if namespace.empty?
-        namespace = @project.namespace.path
-      end
-
-      [
-        namespace_project_path(namespace, base),
-        namespace_project_tree_path(namespace, base, commit)
-      ]
-    end
-  end
-end
diff --git a/app/helpers/gitlab/tab_helper.rb b/app/helpers/gitlab/tab_helper.rb
deleted file mode 100644
index 01d36ff84fc..00000000000
--- a/app/helpers/gitlab/tab_helper.rb
+++ /dev/null
@@ -1,133 +0,0 @@
-module Gitlab
-  module TabHelper
-    # Navigation link helper
-    #
-    # Returns an `li` element with an 'active' class if the supplied
-    # controller(s) and/or action(s) are currently active. The content of the
-    # element is the value passed to the block.
-    #
-    # options - The options hash used to determine if the element is "active" (default: {})
-    #           :controller   - One or more controller names to check (optional).
-    #           :action       - One or more action names to check (optional).
-    #           :path         - A shorthand path, such as 'dashboard#index', to check (optional).
-    #           :html_options - Extra options to be passed to the list element (optional).
-    # block   - An optional block that will become the contents of the returned
-    #           `li` element.
-    #
-    # When both :controller and :action are specified, BOTH must match in order
-    # to be marked as active. When only one is given, either can match.
-    #
-    # Examples
-    #
-    #   # Assuming we're on TreeController#show
-    #
-    #   # Controller matches, but action doesn't
-    #   nav_link(controller: [:tree, :refs], action: :edit) { "Hello" }
-    #   # => '<li>Hello</li>'
-    #
-    #   # Controller matches
-    #   nav_link(controller: [:tree, :refs]) { "Hello" }
-    #   # => '<li class="active">Hello</li>'
-    #
-    #   # Several paths
-    #   nav_link(path: ['tree#show', 'profile#show']) { "Hello" }
-    #   # => '<li class="active">Hello</li>'
-    #
-    #   # Shorthand path
-    #   nav_link(path: 'tree#show') { "Hello" }
-    #   # => '<li class="active">Hello</li>'
-    #
-    #   # Supplying custom options for the list element
-    #   nav_link(controller: :tree, html_options: {class: 'home'}) { "Hello" }
-    #   # => '<li class="home active">Hello</li>'
-    #
-    # Returns a list item element String
-    def nav_link(options = {}, &block)
-      klass = active_nav_link?(options) ? 'active' : ''
-
-      # Add our custom class into the html_options, which may or may not exist
-      # and which may or may not already have a :class key
-      o = options.delete(:html_options) || {}
-      o[:class] ||= ''
-      o[:class] += ' ' + klass
-      o[:class].strip!
-
-      if block_given?
-        content_tag(:li, capture(&block), o)
-      else
-        content_tag(:li, nil, o)
-      end
-    end
-
-    def active_nav_link?(options)
-      if path = options.delete(:path)
-        unless path.respond_to?(:each)
-          path = [path]
-        end
-
-        path.any? do |single_path|
-          current_path?(single_path)
-        end
-      elsif page = options.delete(:page)
-        unless page.respond_to?(:each)
-          page = [page]
-        end
-
-        page.any? do |single_page|
-          current_page?(single_page)
-        end
-      else
-        c = options.delete(:controller)
-        a = options.delete(:action)
-
-        if c && a
-          # When given both options, make sure BOTH are true
-          current_controller?(*c) && current_action?(*a)
-        else
-          # Otherwise check EITHER option
-          current_controller?(*c) || current_action?(*a)
-        end
-      end
-    end
-
-    def current_path?(path)
-      c, a, _ = path.split('#')
-      current_controller?(c) && current_action?(a)
-    end
-
-    def project_tab_class
-      return "active" if current_page?(controller: "/projects", action: :edit, id: @project)
-
-      if ['services', 'hooks', 'deploy_keys', 'protected_branches'].include? controller.controller_name
-        "active"
-      end
-    end
-
-    def branches_tab_class
-      if current_controller?(:protected_branches) ||
-        current_controller?(:branches) ||
-        current_page?(namespace_project_repository_path(@project.namespace,
-                                                        @project))
-        'active'
-      end
-    end
-
-    # Use nav_tab for save controller/action  but different params
-    def nav_tab(key, value, &block)
-      o = {}
-      o[:class] = ""
-
-      if value.nil?
-        o[:class] << " active" if params[key].blank?
-      else
-        o[:class] << " active" if params[key] == value
-      end
-
-      if block_given?
-        content_tag(:li, capture(&block), o)
-      else
-        content_tag(:li, nil, o)
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/tags_helper.rb b/app/helpers/gitlab/tags_helper.rb
deleted file mode 100644
index d694b2c90ce..00000000000
--- a/app/helpers/gitlab/tags_helper.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-module Gitlab
-  module TagsHelper
-    def tag_path(tag)
-      "/tags/#{tag}"
-    end
-
-    def tag_list(project)
-      html = ''
-      project.tag_list.each do |tag|
-        html << link_to(tag, tag_path(tag))
-      end
-
-      html.html_safe
-    end
-  end
-end
diff --git a/app/helpers/gitlab/tree_helper.rb b/app/helpers/gitlab/tree_helper.rb
deleted file mode 100644
index dc48ff0e6e2..00000000000
--- a/app/helpers/gitlab/tree_helper.rb
+++ /dev/null
@@ -1,89 +0,0 @@
-module Gitlab
-  module TreeHelper
-    # Sorts a repository's tree so that folders are before files and renders
-    # their corresponding partials
-    #
-    def render_tree(tree)
-      # Render Folders before Files/Submodules
-      folders, files, submodules = tree.trees, tree.blobs, tree.submodules
-
-      tree = ""
-
-      # Render folders if we have any
-      tree << render(partial: 'projects/tree/tree_item', collection: folders,
-                     locals: { type: 'folder' }) if folders.present?
-
-      # Render files if we have any
-      tree << render(partial: 'projects/tree/blob_item', collection: files,
-                     locals: { type: 'file' }) if files.present?
-
-      # Render submodules if we have any
-      tree << render(partial: 'projects/tree/submodule_item',
-                     collection: submodules) if submodules.present?
-
-      tree.html_safe
-    end
-
-    def render_readme(readme)
-      render_markup(readme.name, readme.data)
-    end
-
-    # Return an image icon depending on the file type and mode
-    #
-    # type - String type of the tree item; either 'folder' or 'file'
-    # mode - File unix mode
-    # name - File name
-    def tree_icon(type, mode, name)
-      icon("#{file_type_icon_class(type, mode, name)} fw")
-    end
-
-    def tree_hex_class(content)
-      "file_#{hexdigest(content.name)}"
-    end
-
-    # Simple shortcut to File.join
-    def tree_join(*args)
-      File.join(*args)
-    end
-
-    def allowed_tree_edit?(project = nil, ref = nil)
-      project ||= @project
-      ref ||= @ref
-      return false unless project.repository.branch_names.include?(ref)
-
-      ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
-    end
-
-    def tree_breadcrumbs(tree, max_links = 2)
-      if @path.present?
-        part_path = ""
-        parts = @path.split('/')
-
-        yield('..', nil) if parts.count > max_links
-
-        parts.each do |part|
-          part_path = File.join(part_path, part) unless part_path.empty?
-          part_path = part if part_path.empty?
-
-          next unless parts.last(2).include?(part) if parts.count > max_links
-          yield(part, tree_join(@ref, part_path))
-        end
-      end
-    end
-
-    def up_dir_path
-      file = File.join(@path, "..")
-      tree_join(@ref, file)
-    end
-
-    # returns the relative path of the first subdir that doesn't have only one directory descendant
-    def flatten_tree(tree)
-      subtree = Gitlab::Git::Tree.where(@repository, @commit.id, tree.path)
-      if subtree.count == 1 && subtree.first.dir?
-        return tree_join(tree.name, flatten_tree(subtree.first))
-      else
-        return tree.name
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/version_check_helper.rb b/app/helpers/gitlab/version_check_helper.rb
deleted file mode 100644
index 46a12cc8c60..00000000000
--- a/app/helpers/gitlab/version_check_helper.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-module Gitlab
-  module VersionCheckHelper
-    def version_status_badge
-      if Rails.env.production?
-        image_tag VersionCheck.new.url
-      end
-    end
-  end
-end
diff --git a/app/helpers/gitlab/visibility_level_helper.rb b/app/helpers/gitlab/visibility_level_helper.rb
deleted file mode 100644
index feba901f7d7..00000000000
--- a/app/helpers/gitlab/visibility_level_helper.rb
+++ /dev/null
@@ -1,97 +0,0 @@
-module Gitlab
-  module VisibilityLevelHelper
-    def visibility_level_color(level)
-      case level
-      when Gitlab::VisibilityLevel::PRIVATE
-        'vs-private'
-      when Gitlab::VisibilityLevel::INTERNAL
-        'vs-internal'
-      when Gitlab::VisibilityLevel::PUBLIC
-        'vs-public'
-      end
-    end
-
-    # Return the description for the +level+ argument.
-    #
-    # +level+ One of the Gitlab::VisibilityLevel constants
-    # +form_model+ Either a model object (Project, Snippet, etc.) or the name of
-    #              a Project or Snippet class.
-    def visibility_level_description(level, form_model)
-      case form_model.is_a?(String) ? form_model : form_model.class.name
-      when 'PersonalSnippet', 'ProjectSnippet', 'Snippet'
-        snippet_visibility_level_description(level)
-      when 'Project'
-        project_visibility_level_description(level)
-      end
-    end
-
-    def project_visibility_level_description(level)
-      capture_haml do
-        haml_tag :span do
-          case level
-          when Gitlab::VisibilityLevel::PRIVATE
-            haml_concat "Project access must be granted explicitly for each user."
-          when Gitlab::VisibilityLevel::INTERNAL
-            haml_concat "The project can be cloned by"
-            haml_concat "any logged in user."
-          when Gitlab::VisibilityLevel::PUBLIC
-            haml_concat "The project can be cloned"
-            haml_concat "without any"
-            haml_concat "authentication."
-          end
-        end
-      end
-    end
-
-    def snippet_visibility_level_description(level)
-      capture_haml do
-        haml_tag :span do
-          case level
-          when Gitlab::VisibilityLevel::PRIVATE
-            haml_concat "The snippet is visible only for me."
-          when Gitlab::VisibilityLevel::INTERNAL
-            haml_concat "The snippet is visible for any logged in user."
-          when Gitlab::VisibilityLevel::PUBLIC
-            haml_concat "The snippet can be accessed"
-            haml_concat "without any"
-            haml_concat "authentication."
-          end
-        end
-      end
-    end
-
-    def visibility_level_icon(level)
-      case level
-      when Gitlab::VisibilityLevel::PRIVATE
-        private_icon
-      when Gitlab::VisibilityLevel::INTERNAL
-        internal_icon
-      when Gitlab::VisibilityLevel::PUBLIC
-        public_icon
-      end
-    end
-
-    def visibility_level_label(level)
-      Project.visibility_levels.key(level)
-    end
-
-    def restricted_visibility_levels(show_all = false)
-      return [] if current_user.is_admin? && !show_all
-      current_application_settings.restricted_visibility_levels || []
-    end
-
-    def default_project_visibility
-      current_application_settings.default_project_visibility
-    end
-
-    def default_snippet_visibility
-      current_application_settings.default_snippet_visibility
-    end
-
-    def skip_level?(form_model, level)
-      form_model.is_a?(Project) &&
-      form_model.forked? &&
-      !Gitlab::VisibilityLevel.allowed_fork_levels(form_model.forked_from_project.visibility_level).include?(level)
-    end
-  end
-end
diff --git a/app/helpers/gitlab/wiki_helper.rb b/app/helpers/gitlab/wiki_helper.rb
deleted file mode 100644
index 02a1daf0019..00000000000
--- a/app/helpers/gitlab/wiki_helper.rb
+++ /dev/null
@@ -1,26 +0,0 @@
-module Gitlab
-  module WikiHelper
-    # Rails v4.1.9+ escapes all model IDs, converting slashes into %2F. The
-    # only way around this is to implement our own path generators.
-    def namespace_project_wiki_path(namespace, project, wiki_page, *args)
-      slug =
-          case wiki_page
-          when Symbol
-            wiki_page
-          when String
-            wiki_page
-          else
-            wiki_page.slug
-          end
-      namespace_project_path(namespace, project) + "/wikis/#{slug}"
-    end
-
-    def edit_namespace_project_wiki_path(namespace, project, wiki_page, *args)
-      namespace_project_wiki_path(namespace, project, wiki_page) + '/edit'
-    end
-
-    def history_namespace_project_wiki_path(namespace, project, wiki_page, *args)
-      namespace_project_wiki_path(namespace, project, wiki_page) + '/history'
-    end
-  end
-end
diff --git a/app/helpers/gitlab_markdown_helper.rb b/app/helpers/gitlab_markdown_helper.rb
new file mode 100644
index 00000000000..1ebfd92f119
--- /dev/null
+++ b/app/helpers/gitlab_markdown_helper.rb
@@ -0,0 +1,196 @@
+require 'nokogiri'
+
+module GitlabMarkdownHelper
+  # Use this in places where you would normally use link_to(gfm(...), ...).
+  #
+  # It solves a problem occurring with nested links (i.e.
+  # "<a>outer text <a>gfm ref</a> more outer text</a>"). This will not be
+  # interpreted as intended. Browsers will parse something like
+  # "<a>outer text </a><a>gfm ref</a> more outer text" (notice the last part is
+  # not linked any more). link_to_gfm corrects that. It wraps all parts to
+  # explicitly produce the correct linking behavior (i.e.
+  # "<a>outer text </a><a>gfm ref</a><a> more outer text</a>").
+  def link_to_gfm(body, url, html_options = {})
+    return "" if body.blank?
+
+    escaped_body = if body =~ /\A\<img/
+                     body
+                   else
+                     escape_once(body)
+                   end
+
+    gfm_body = Gitlab::Markdown.gfm(escaped_body, project: @project, current_user: current_user)
+
+    fragment = Nokogiri::XML::DocumentFragment.parse(gfm_body)
+    if fragment.children.size == 1 && fragment.children[0].name == 'a'
+      # Fragment has only one node, and it's a link generated by `gfm`.
+      # Replace it with our requested link.
+      text = fragment.children[0].text
+      fragment.children[0].replace(link_to(text, url, html_options))
+    else
+      # Traverse the fragment's first generation of children looking for pure
+      # text, wrapping anything found in the requested link
+      fragment.children.each do |node|
+        next unless node.text?
+        node.replace(link_to(node.text, url, html_options))
+      end
+    end
+
+    # Add any custom CSS classes to the GFM-generated reference links
+    if html_options[:class]
+      fragment.css('a.gfm').add_class(html_options[:class])
+    end
+
+    fragment.to_html.html_safe
+  end
+
+  def markdown(text, context = {})
+    context.merge!(
+      current_user: current_user,
+      path:         @path,
+      project:      @project,
+      project_wiki: @project_wiki,
+      ref:          @ref
+    )
+
+    Gitlab::Markdown.render(text, context)
+  end
+
+  # TODO (rspeicher): Remove all usages of this helper and just call `markdown`
+  # with a custom pipeline depending on the content being rendered
+  def gfm(text, options = {})
+    options.merge!(
+      current_user: current_user,
+      path:         @path,
+      project:      @project,
+      project_wiki: @project_wiki,
+      ref:          @ref
+    )
+
+    Gitlab::Markdown.gfm(text, options)
+  end
+
+  def asciidoc(text)
+    Gitlab::Asciidoc.render(text, {
+      commit: @commit,
+      project: @project,
+      project_wiki: @project_wiki,
+      requested_path: @path,
+      ref: @ref
+    })
+  end
+
+  # Return the first line of +text+, up to +max_chars+, after parsing the line
+  # as Markdown.  HTML tags in the parsed output are not counted toward the
+  # +max_chars+ limit.  If the length limit falls within a tag's contents, then
+  # the tag contents are truncated without removing the closing tag.
+  def first_line_in_markdown(text, max_chars = nil, options = {})
+    md = markdown(text, options).strip
+
+    truncate_visible(md, max_chars || md.length) if md.present?
+  end
+
+  def render_wiki_content(wiki_page)
+    case wiki_page.format
+    when :markdown
+      markdown(wiki_page.content)
+    when :asciidoc
+      asciidoc(wiki_page.content)
+    else
+      wiki_page.formatted_content.html_safe
+    end
+  end
+
+  MARKDOWN_TIPS = [
+    "End a line with two or more spaces for a line-break, or soft-return",
+    "Inline code can be denoted by `surrounding it with backticks`",
+    "Blocks of code can be denoted by three backticks ``` or four leading spaces",
+    "Emoji can be added by :emoji_name:, for example :thumbsup:",
+    "Notify other participants using @user_name",
+    "Notify a specific group using @group_name",
+    "Notify the entire team using @all",
+    "Reference an issue using a hash, for example issue #123",
+    "Reference a merge request using an exclamation point, for example MR !123",
+    "Italicize words or phrases using *asterisks* or _underscores_",
+    "Bold words or phrases using **double asterisks** or __double underscores__",
+    "Strikethrough words or phrases using ~~two tildes~~",
+    "Make a bulleted list using + pluses, - minuses, or * asterisks",
+    "Denote blockquotes using > at the beginning of a line",
+    "Make a horizontal line using three or more hyphens ---, asterisks ***, or underscores ___"
+  ].freeze
+
+  # Returns a random markdown tip for use as a textarea placeholder
+  def random_markdown_tip
+    MARKDOWN_TIPS.sample
+  end
+
+  private
+
+  # Return +text+, truncated to +max_chars+ characters, excluding any HTML
+  # tags.
+  def truncate_visible(text, max_chars)
+    doc = Nokogiri::HTML.fragment(text)
+    content_length = 0
+    truncated = false
+
+    doc.traverse do |node|
+      if node.text? || node.content.empty?
+        if truncated
+          node.remove
+          next
+        end
+
+        # Handle line breaks within a node
+        if node.content.strip.lines.length > 1
+          node.content = "#{node.content.lines.first.chomp}..."
+          truncated = true
+        end
+
+        num_remaining = max_chars - content_length
+        if node.content.length > num_remaining
+          node.content = node.content.truncate(num_remaining)
+          truncated = true
+        end
+        content_length += node.content.length
+      end
+
+      truncated = truncate_if_block(node, truncated)
+    end
+
+    doc.to_html
+  end
+
+  # Used by #truncate_visible.  If +node+ is the first block element, and the
+  # text hasn't already been truncated, then append "..." to the node contents
+  # and return true.  Otherwise return false.
+  def truncate_if_block(node, truncated)
+    if node.element? && node.description.block? && !truncated
+      node.content = "#{node.content}..." if node.next_sibling
+      true
+    else
+      truncated
+    end
+  end
+
+  # Returns the text necessary to reference `entity` across projects
+  #
+  # project - Project to reference
+  # entity  - Object that responds to `to_reference`
+  #
+  # Examples:
+  #
+  #   cross_project_reference(project, project.issues.first)
+  #   # => 'namespace1/project1#123'
+  #
+  #   cross_project_reference(project, project.merge_requests.first)
+  #   # => 'namespace1/project1!345'
+  #
+  # Returns a String
+  def cross_project_reference(project, entity)
+    if entity.respond_to?(:to_reference)
+      "#{project.to_reference}#{entity.to_reference}"
+    else
+      ''
+    end
+  end
+end
diff --git a/app/helpers/gitlab_routing_helper.rb b/app/helpers/gitlab_routing_helper.rb
new file mode 100644
index 00000000000..d0fae255a04
--- /dev/null
+++ b/app/helpers/gitlab_routing_helper.rb
@@ -0,0 +1,67 @@
+# Shorter routing method for project and project items
+# Since update to rails 4.1.9 we are now allowed to use `/` in project routing
+# so we use nested routing for project resources which include project and
+# project namespace. To avoid writing long methods every time we define shortcuts for
+# some of routing.
+#
+# For example instead of this:
+#
+#   namespace_project_merge_request_path(merge_request.project.namespace, merge_request.projects, merge_request)
+#
+# We can simply use shortcut:
+#
+#   merge_request_path(merge_request)
+#
+module GitlabRoutingHelper
+  def project_path(project, *args)
+    namespace_project_path(project.namespace, project, *args)
+  end
+
+  def activity_project_path(project, *args)
+    activity_namespace_project_path(project.namespace, project, *args)
+  end
+
+  def edit_project_path(project, *args)
+    edit_namespace_project_path(project.namespace, project, *args)
+  end
+
+  def issue_path(entity, *args)
+    namespace_project_issue_path(entity.project.namespace, entity.project, entity, *args)
+  end
+
+  def merge_request_path(entity, *args)
+    namespace_project_merge_request_path(entity.project.namespace, entity.project, entity, *args)
+  end
+
+  def milestone_path(entity, *args)
+    namespace_project_milestone_path(entity.project.namespace, entity.project, entity, *args)
+  end
+
+  def project_url(project, *args)
+    namespace_project_url(project.namespace, project, *args)
+  end
+
+  def edit_project_url(project, *args)
+    edit_namespace_project_url(project.namespace, project, *args)
+  end
+
+  def issue_url(entity, *args)
+    namespace_project_issue_url(entity.project.namespace, entity.project, entity, *args)
+  end
+
+  def merge_request_url(entity, *args)
+    namespace_project_merge_request_url(entity.project.namespace, entity.project, entity, *args)
+  end
+
+  def project_snippet_url(entity, *args)
+    namespace_project_snippet_url(entity.project.namespace, entity.project, entity, *args)
+  end
+
+  def toggle_subscription_path(entity, *args)
+    if entity.is_a?(Issue)
+      toggle_subscription_namespace_project_issue_path(entity.project.namespace, entity.project, entity)
+    else
+      toggle_subscription_namespace_project_merge_request_path(entity.project.namespace, entity.project, entity)
+    end
+  end
+end
diff --git a/app/helpers/graph_helper.rb b/app/helpers/graph_helper.rb
new file mode 100644
index 00000000000..e1dda20de85
--- /dev/null
+++ b/app/helpers/graph_helper.rb
@@ -0,0 +1,16 @@
+module GraphHelper
+  def get_refs(repo, commit)
+    refs = ""
+    refs << commit.ref_names(repo).join(' ')
+
+    # append note count
+    refs << "[#{@graph.notes[commit.id]}]" if @graph.notes[commit.id] > 0
+
+    refs
+  end
+
+  def parents_zip_spaces(parents, parent_spaces)
+    ids = parents.map { |p| p.id }
+    ids.zip(parent_spaces)
+  end
+end
diff --git a/app/helpers/groups_helper.rb b/app/helpers/groups_helper.rb
new file mode 100644
index 00000000000..82eebf4245b
--- /dev/null
+++ b/app/helpers/groups_helper.rb
@@ -0,0 +1,42 @@
+module GroupsHelper
+  def remove_user_from_group_message(group, member)
+    if member.user
+      "Are you sure you want to remove \"#{member.user.name}\" from \"#{group.name}\"?"
+    else
+      "Are you sure you want to revoke the invitation for \"#{member.invite_email}\" to join \"#{group.name}\"?"
+    end
+  end
+
+  def leave_group_message(group)
+    "Are you sure you want to leave \"#{group}\" group?"
+  end
+
+  def should_user_see_group_roles?(user, group)
+    if user
+      user.is_admin? || group.members.exists?(user_id: user.id)
+    else
+      false
+    end
+  end
+
+  def group_icon(group)
+    if group.is_a?(String)
+      group = Group.find_by(path: group)
+    end
+
+    if group && group.avatar.present?
+      group.avatar.url
+    else
+      image_path('no_group_avatar.png')
+    end
+  end
+
+  def group_title(group, name, url)
+    content_tag :span do
+      link_to(
+        simple_sanitize(group.name), group_path(group)
+      ) + ' &middot; '.html_safe +
+        link_to(simple_sanitize(name), url)
+    end
+  end
+end
diff --git a/app/helpers/icons_helper.rb b/app/helpers/icons_helper.rb
new file mode 100644
index 00000000000..1cf5b96481a
--- /dev/null
+++ b/app/helpers/icons_helper.rb
@@ -0,0 +1,85 @@
+module IconsHelper
+  include FontAwesome::Rails::IconHelper
+
+  # Creates an icon tag given icon name(s) and possible icon modifiers.
+  #
+  # Right now this method simply delegates directly to `fa_icon` from the
+  # font-awesome-rails gem, but should we ever use a different icon pack in the
+  # future we won't have to change hundreds of method calls.
+  def icon(names, options = {})
+    fa_icon(names, options)
+  end
+
+  def spinner(text = nil, visible = false)
+    css_class = 'loading'
+    css_class << ' hide' unless visible
+
+    content_tag :div, class: css_class do
+      icon('spinner spin') + text
+    end
+  end
+
+  def boolean_to_icon(value)
+    if value
+      icon('circle', class: 'cgreen')
+    else
+      icon('power-off', class: 'clgray')
+    end
+  end
+
+  def public_icon
+    icon('globe fw')
+  end
+
+  def internal_icon
+    icon('shield fw')
+  end
+
+  def private_icon
+    icon('lock fw')
+  end
+
+  def file_type_icon_class(type, mode, name)
+    if type == 'folder'
+      icon_class = 'folder'
+    elsif mode == '120000'
+      icon_class = 'share'
+    else
+      # Guess which icon to choose based on file extension.
+      # If you think a file extension is missing, feel free to add it on PR
+
+      case File.extname(name).downcase
+      when '.pdf'
+        icon_class = 'file-pdf-o'
+      when '.jpg', '.jpeg', '.jif', '.jfif',
+          '.jp2', '.jpx', '.j2k', '.j2c',
+          '.png', '.gif', '.tif', '.tiff',
+          '.svg', '.ico', '.bmp'
+        icon_class = 'file-image-o'
+      when '.zip', '.zipx', '.tar', '.gz', '.bz', '.bzip',
+          '.xz', '.rar', '.7z'
+        icon_class = 'file-archive-o'
+      when '.mp3', '.wma', '.ogg', '.oga', '.wav', '.flac', '.aac'
+        icon_class = 'file-audio-o'
+      when '.mp4', '.m4p', '.m4v',
+          '.mpg', '.mp2', '.mpeg', '.mpe', '.mpv',
+          '.mpg', '.mpeg', '.m2v',
+          '.avi', '.mkv', '.flv', '.ogv', '.mov',
+          '.3gp', '.3g2'
+        icon_class = 'file-video-o'
+      when '.doc', '.dot', '.docx', '.docm', '.dotx', '.dotm', '.docb'
+        icon_class = 'file-word-o'
+      when '.xls', '.xlt', '.xlm', '.xlsx', '.xlsm', '.xltx', '.xltm',
+          '.xlsb', '.xla', '.xlam', '.xll', '.xlw'
+        icon_class = 'file-excel-o'
+      when '.ppt', '.pot', '.pps', '.pptx', '.pptm', '.potx', '.potm',
+          '.ppam', '.ppsx', '.ppsm', '.sldx', '.sldm'
+        icon_class = 'file-powerpoint-o'
+      else
+        icon_class = 'file-text-o'
+      end
+    end
+
+    icon_class
+  end
+end
diff --git a/app/helpers/issues_helper.rb b/app/helpers/issues_helper.rb
new file mode 100644
index 00000000000..6ddb37cd0dc
--- /dev/null
+++ b/app/helpers/issues_helper.rb
@@ -0,0 +1,88 @@
+module IssuesHelper
+  def issue_css_classes(issue)
+    classes = "issue"
+    classes << " closed" if issue.closed?
+    classes << " today" if issue.today?
+    classes
+  end
+
+  # Returns an OpenStruct object suitable for use by <tt>options_from_collection_for_select</tt>
+  # to allow filtering issues by an unassigned User or Milestone
+  def unassigned_filter
+    # Milestone uses :title, Issue uses :name
+    OpenStruct.new(id: 0, title: 'None (backlog)', name: 'Unassigned')
+  end
+
+  def url_for_project_issues(project = @project, options = {})
+    return '' if project.nil?
+
+    if options[:only_path]
+      project.issues_tracker.project_path
+    else
+      project.issues_tracker.project_url
+    end
+  end
+
+  def url_for_new_issue(project = @project, options = {})
+    return '' if project.nil?
+
+    if options[:only_path]
+      project.issues_tracker.new_issue_path
+    else
+      project.issues_tracker.new_issue_url
+    end
+  end
+
+  def url_for_issue(issue_iid, project = @project, options = {})
+    return '' if project.nil?
+
+    if options[:only_path]
+      project.issues_tracker.issue_path(issue_iid)
+    else
+      project.issues_tracker.issue_url(issue_iid)
+    end
+  end
+
+  def bulk_update_milestone_options
+    options_for_select([['None (backlog)', -1]]) +
+        options_from_collection_for_select(project_active_milestones, 'id',
+                                           'title', params[:milestone_id])
+  end
+
+  def milestone_options(object)
+    options_from_collection_for_select(object.project.milestones.active,
+                                       'id', 'title', object.milestone_id)
+  end
+
+  def issue_box_class(item)
+    if item.respond_to?(:expired?) && item.expired?
+      'issue-box-expired'
+    elsif item.respond_to?(:merged?) && item.merged?
+      'issue-box-merged'
+    elsif item.closed?
+      'issue-box-closed'
+    else
+      'issue-box-open'
+    end
+  end
+
+  def issue_to_atom(xml, issue)
+    xml.entry do
+      xml.id      namespace_project_issue_url(issue.project.namespace,
+                                              issue.project, issue)
+      xml.link    href: namespace_project_issue_url(issue.project.namespace,
+                                                    issue.project, issue)
+      xml.title   truncate(issue.title, length: 80)
+      xml.updated issue.created_at.strftime("%Y-%m-%dT%H:%M:%SZ")
+      xml.media   :thumbnail, width: "40", height: "40", url: avatar_icon(issue.author_email)
+      xml.author do |author|
+        xml.name issue.author_name
+        xml.email issue.author_email
+      end
+      xml.summary issue.title
+    end
+  end
+
+  # Required for Gitlab::Markdown::IssueReferenceFilter
+  module_function :url_for_issue
+end
diff --git a/app/helpers/labels_helper.rb b/app/helpers/labels_helper.rb
new file mode 100644
index 00000000000..8036303851b
--- /dev/null
+++ b/app/helpers/labels_helper.rb
@@ -0,0 +1,101 @@
+module LabelsHelper
+  include ActionView::Helpers::TagHelper
+
+  # Link to a Label
+  #
+  # label   - Label object to link to
+  # project - Project object which will be used as the context for the label's
+  #           link. If omitted, defaults to `@project`, or the label's own
+  #           project.
+  # block   - An optional block that will be passed to `link_to`, forming the
+  #           body of the link element. If omitted, defaults to
+  #           `render_colored_label`.
+  #
+  # Examples:
+  #
+  #   # Allow the generated link to use the label's own project
+  #   link_to_label(label)
+  #
+  #   # Force the generated link to use @project
+  #   @project = Project.first
+  #   link_to_label(label)
+  #
+  #   # Force the generated link to use a provided project
+  #   link_to_label(label, project: Project.last)
+  #
+  #   # Customize link body with a block
+  #   link_to_label(label) { "My Custom Label Text" }
+  #
+  # Returns a String
+  def link_to_label(label, project: nil, &block)
+    project ||= @project || label.project
+    link = namespace_project_issues_path(project.namespace, project,
+                                         label_name: label.name)
+
+    if block_given?
+      link_to link, &block
+    else
+      link_to render_colored_label(label), link
+    end
+  end
+
+  def project_label_names
+    @project.labels.pluck(:title)
+  end
+
+  def render_colored_label(label)
+    label_color = label.color || Label::DEFAULT_COLOR
+    text_color = text_color_for_bg(label_color)
+
+    # Intentionally not using content_tag here so that this method can be called
+    # by LabelReferenceFilter
+    span = %(<span class="label color-label") +
+      %( style="background-color: #{label_color}; color: #{text_color}">) +
+      escape_once(label.name) + '</span>'
+
+    span.html_safe
+  end
+
+  def suggested_colors
+    [
+      '#0033CC',
+      '#428BCA',
+      '#44AD8E',
+      '#A8D695',
+      '#5CB85C',
+      '#69D100',
+      '#004E00',
+      '#34495E',
+      '#7F8C8D',
+      '#A295D6',
+      '#5843AD',
+      '#8E44AD',
+      '#FFECDB',
+      '#AD4363',
+      '#D10069',
+      '#CC0033',
+      '#FF0000',
+      '#D9534F',
+      '#D1D100',
+      '#F0AD4E',
+      '#AD8D43'
+    ]
+  end
+
+  def text_color_for_bg(bg_color)
+    r, g, b = bg_color.slice(1,7).scan(/.{2}/).map(&:hex)
+
+    if (r + g + b) > 500
+      '#333333'
+    else
+      '#FFFFFF'
+    end
+  end
+
+  def project_labels_options(project)
+    options_from_collection_for_select(project.labels, 'name', 'name', params[:label_name])
+  end
+
+  # Required for Gitlab::Markdown::LabelReferenceFilter
+  module_function :render_colored_label, :text_color_for_bg, :escape_once
+end
diff --git a/app/helpers/merge_requests_helper.rb b/app/helpers/merge_requests_helper.rb
new file mode 100644
index 00000000000..f8169b4f288
--- /dev/null
+++ b/app/helpers/merge_requests_helper.rb
@@ -0,0 +1,74 @@
+module MergeRequestsHelper
+  def new_mr_path_from_push_event(event)
+    target_project = event.project.forked_from_project || event.project
+    new_namespace_project_merge_request_path(
+      event.project.namespace,
+      event.project,
+      new_mr_from_push_event(event, target_project)
+    )
+  end
+
+  def new_mr_path_for_fork_from_push_event(event)
+    new_namespace_project_merge_request_path(
+      event.project.namespace,
+      event.project,
+      new_mr_from_push_event(event, event.project.forked_from_project)
+    )
+  end
+
+  def new_mr_from_push_event(event, target_project)
+    {
+      merge_request: {
+        source_project_id: event.project.id,
+        target_project_id: target_project.id,
+        source_branch: event.branch_name,
+        target_branch: target_project.repository.root_ref
+      }
+    }
+  end
+
+  def mr_css_classes(mr)
+    classes = "merge-request"
+    classes << " closed" if mr.closed?
+    classes << " merged" if mr.merged?
+    classes
+  end
+
+  def ci_build_details_path(merge_request)
+    merge_request.source_project.ci_service.build_page(merge_request.last_commit.sha, merge_request.source_branch)
+  end
+
+  def merge_path_description(merge_request, separator)
+    if merge_request.for_fork?
+      "Project:Branches: #{@merge_request.source_project_path}:#{@merge_request.source_branch} #{separator} #{@merge_request.target_project.path_with_namespace}:#{@merge_request.target_branch}"
+    else
+      "Branches: #{@merge_request.source_branch} #{separator} #{@merge_request.target_branch}"
+    end
+  end
+
+  def issues_sentence(issues)
+    issues.map { |i| "##{i.iid}" }.to_sentence
+  end
+
+  def mr_change_branches_path(merge_request)
+    new_namespace_project_merge_request_path(
+      @project.namespace, @project,
+      merge_request: {
+        source_project_id: @merge_request.source_project_id,
+        target_project_id: @merge_request.target_project_id,
+        source_branch: @merge_request.source_branch,
+        target_branch: nil
+      }
+    )
+  end
+
+  def source_branch_with_namespace(merge_request)
+    if merge_request.for_fork?
+      namespace = link_to(merge_request.source_project_namespace,
+        project_path(merge_request.source_project))
+      namespace + ":#{merge_request.source_branch}"
+    else
+      merge_request.source_branch
+    end
+  end
+end
diff --git a/app/helpers/milestones_helper.rb b/app/helpers/milestones_helper.rb
new file mode 100644
index 00000000000..132a893e532
--- /dev/null
+++ b/app/helpers/milestones_helper.rb
@@ -0,0 +1,36 @@
+module MilestonesHelper
+  def milestones_filter_path(opts = {})
+    if @project
+      namespace_project_milestones_path(@project.namespace, @project, opts)
+    elsif @group
+      group_milestones_path(@group, opts)
+    else
+      dashboard_milestones_path(opts)
+    end
+  end
+
+  def milestone_progress_bar(milestone)
+    options = {
+      class: 'progress-bar progress-bar-success',
+      style: "width: #{milestone.percent_complete}%;"
+    }
+
+    content_tag :div, class: 'progress' do
+      content_tag :div, nil, options
+    end
+  end
+
+  def projects_milestones_options
+    milestones =
+      if @project
+        @project.milestones
+      else
+        Milestone.where(project_id: @projects)
+      end.active
+
+    grouped_milestones = Milestones::GroupService.new(milestones).execute
+    grouped_milestones.unshift(Milestone::None)
+
+    options_from_collection_for_select(grouped_milestones, 'title', 'title', params[:milestone_title])
+  end
+end
diff --git a/app/helpers/namespaces_helper.rb b/app/helpers/namespaces_helper.rb
new file mode 100644
index 00000000000..b3132a1f3ba
--- /dev/null
+++ b/app/helpers/namespaces_helper.rb
@@ -0,0 +1,36 @@
+module NamespacesHelper
+  def namespaces_options(selected = :current_user, scope = :default)
+    groups = current_user.owned_groups + current_user.masters_groups
+    users = [current_user.namespace]
+
+    group_opts = ["Groups", groups.sort_by(&:human_name).map {|g| [g.human_name, g.id]} ]
+    users_opts = [ "Users", users.sort_by(&:human_name).map {|u| [u.human_name, u.id]} ]
+
+    options = []
+    options << group_opts
+    options << users_opts
+
+    if selected == :current_user && current_user.namespace
+      selected = current_user.namespace.id
+    end
+
+    grouped_options_for_select(options, selected)
+  end
+
+  def namespace_select_tag(id, opts = {})
+    css_class = "ajax-namespace-select "
+    css_class << "multiselect " if opts[:multiple]
+    css_class << (opts[:class] || '')
+    value = opts[:selected] || ''
+
+    hidden_field_tag(id, value, class: css_class)
+  end
+
+  def namespace_icon(namespace, size = 40)
+    if namespace.kind_of?(Group)
+      group_icon(namespace)
+    else
+      avatar_icon(namespace.owner.email, size)
+    end
+  end
+end
diff --git a/app/helpers/nav_helper.rb b/app/helpers/nav_helper.rb
new file mode 100644
index 00000000000..9b1dd8b8e54
--- /dev/null
+++ b/app/helpers/nav_helper.rb
@@ -0,0 +1,21 @@
+module NavHelper
+  def nav_menu_collapsed?
+    cookies[:collapsed_nav] == 'true'
+  end
+
+  def nav_sidebar_class
+    if nav_menu_collapsed?
+      "page-sidebar-collapsed"
+    else
+      "page-sidebar-expanded"
+    end
+  end
+
+  def nav_header_class
+    if nav_menu_collapsed?
+      "header-collapsed"
+    else
+      "header-expanded"
+    end
+  end
+end
diff --git a/app/helpers/notes_helper.rb b/app/helpers/notes_helper.rb
new file mode 100644
index 00000000000..5f0c921413a
--- /dev/null
+++ b/app/helpers/notes_helper.rb
@@ -0,0 +1,76 @@
+module NotesHelper
+  # Helps to distinguish e.g. commit notes in mr notes list
+  def note_for_main_target?(note)
+    (@noteable.class.name == note.noteable_type && !note.for_diff_line?)
+  end
+
+  def note_target_fields(note)
+    hidden_field_tag(:target_type, note.noteable.class.name.underscore) +
+    hidden_field_tag(:target_id, note.noteable.id)
+  end
+
+  def note_editable?(note)
+    note.editable? && can?(current_user, :admin_note, note)
+  end
+
+  def link_to_commit_diff_line_note(note)
+    if note.for_commit_diff_line?
+      link_to(
+        "#{note.diff_file_name}:L#{note.diff_new_line}",
+        namespace_project_commit_path(@project.namespace, @project,
+                                      note.noteable, anchor: note.line_code)
+      )
+    end
+  end
+
+  def noteable_json(noteable)
+    {
+      id: noteable.id,
+      class: noteable.class.name,
+      resources: noteable.class.table_name,
+      project_id: noteable.project.id,
+    }.to_json
+  end
+
+  def link_to_new_diff_note(line_code, line_type = nil)
+    discussion_id = Note.build_discussion_id(
+      @comments_target[:noteable_type],
+      @comments_target[:noteable_id] || @comments_target[:commit_id],
+      line_code
+    )
+
+    data = {
+      noteable_type: @comments_target[:noteable_type],
+      noteable_id:   @comments_target[:noteable_id],
+      commit_id:     @comments_target[:commit_id],
+      line_code:     line_code,
+      discussion_id: discussion_id,
+      line_type:     line_type
+    }
+
+    button_tag(class: 'btn add-diff-note js-add-diff-note-button',
+               data: data,
+               title: 'Add a comment to this line') do
+      icon('comment-o')
+    end
+  end
+
+  def link_to_reply_diff(note, line_type = nil)
+    return unless current_user
+
+    data = {
+      noteable_type: note.noteable_type,
+      noteable_id:   note.noteable_id,
+      commit_id:     note.commit_id,
+      line_code:     note.line_code,
+      discussion_id: note.discussion_id,
+      line_type:     line_type
+    }
+
+    button_tag class: 'btn reply-btn js-discussion-reply-button',
+               data: data, title: 'Add a reply' do
+      link_text = icon('comment')
+      link_text << ' Reply'
+    end
+  end
+end
diff --git a/app/helpers/notifications_helper.rb b/app/helpers/notifications_helper.rb
new file mode 100644
index 00000000000..2f8e64c375f
--- /dev/null
+++ b/app/helpers/notifications_helper.rb
@@ -0,0 +1,15 @@
+module NotificationsHelper
+  include IconsHelper
+
+  def notification_icon(notification)
+    if notification.disabled?
+      icon('volume-off', class: 'ns-mute')
+    elsif notification.participating?
+      icon('volume-down', class: 'ns-part')
+    elsif notification.watch?
+      icon('volume-up', class: 'ns-watch')
+    else
+      icon('circle-o', class: 'ns-default')
+    end
+  end
+end
diff --git a/app/helpers/preferences_helper.rb b/app/helpers/preferences_helper.rb
new file mode 100644
index 00000000000..7f1b6a69926
--- /dev/null
+++ b/app/helpers/preferences_helper.rb
@@ -0,0 +1,44 @@
+# Helper methods for per-User preferences
+module PreferencesHelper
+  # Maps `dashboard` values to more user-friendly option text
+  DASHBOARD_CHOICES = {
+    projects: 'Your Projects (default)',
+    stars:    'Starred Projects'
+  }.with_indifferent_access.freeze
+
+  # Returns an Array usable by a select field for more user-friendly option text
+  def dashboard_choices
+    defined = User.dashboards
+
+    if defined.size != DASHBOARD_CHOICES.size
+      # Ensure that anyone adding new options updates this method too
+      raise RuntimeError, "`User` defines #{defined.size} dashboard choices," +
+        " but `DASHBOARD_CHOICES` defined #{DASHBOARD_CHOICES.size}."
+    else
+      defined.map do |key, _|
+        # Use `fetch` so `KeyError` gets raised when a key is missing
+        [DASHBOARD_CHOICES.fetch(key), key]
+      end
+    end
+  end
+
+  def project_view_choices
+    [
+      ['Readme (default)', :readme],
+      ['Activity view', :activity]
+    ]
+  end
+
+  def user_application_theme
+    Gitlab::Themes.for_user(current_user).css_class
+  end
+
+  def user_color_scheme
+    Gitlab::ColorSchemes.for_user(current_user).css_class
+  end
+
+  def prefer_readme?
+    !current_user ||
+      current_user.project_view == 'readme'
+  end
+end
diff --git a/app/helpers/projects_helper.rb b/app/helpers/projects_helper.rb
new file mode 100644
index 00000000000..ab9b068de05
--- /dev/null
+++ b/app/helpers/projects_helper.rb
@@ -0,0 +1,330 @@
+module ProjectsHelper
+  def remove_from_project_team_message(project, member)
+    if member.user
+      "You are going to remove #{member.user.name} from #{project.name} project team. Are you sure?"
+    else
+      "You are going to revoke the invitation for #{member.invite_email} to join #{project.name} project team. Are you sure?"
+    end
+  end
+
+  def link_to_project(project)
+    link_to [project.namespace.becomes(Namespace), project] do
+      title = content_tag(:span, project.name, class: 'project-name')
+
+      if project.namespace
+        namespace = content_tag(:span, "#{project.namespace.human_name} / ", class: 'namespace-name')
+        title = namespace + title
+      end
+
+      title
+    end
+  end
+
+  def link_to_member(project, author, opts = {})
+    default_opts = { avatar: true, name: true, size: 16, author_class: 'author' }
+    opts = default_opts.merge(opts)
+
+    return "(deleted)" unless author
+
+    author_html =  ""
+
+    # Build avatar image tag
+    author_html << image_tag(avatar_icon(author.try(:email), opts[:size]), width: opts[:size], class: "avatar avatar-inline #{"s#{opts[:size]}" if opts[:size]}", alt:'') if opts[:avatar]
+
+    # Build name span tag
+    author_html << content_tag(:span, sanitize(author.name), class: opts[:author_class]) if opts[:name]
+
+    author_html = author_html.html_safe
+
+    if opts[:name]
+      link_to(author_html, user_path(author), class: "author_link").html_safe
+    else
+      link_to(author_html, user_path(author), class: "author_link has_tooltip", data: { :'original-title' => sanitize(author.name) } ).html_safe
+    end
+  end
+
+  def project_title(project)
+    if project.group
+      content_tag :span do
+        link_to(
+          simple_sanitize(project.group.name), group_path(project.group)
+        ) + ' / ' +
+          link_to(simple_sanitize(project.name),
+                  project_path(project))
+      end
+    else
+      owner = project.namespace.owner
+      content_tag :span do
+        link_to(
+          simple_sanitize(owner.name), user_path(owner)
+        ) + ' / ' +
+          link_to(simple_sanitize(project.name),
+                  project_path(project))
+      end
+    end
+  end
+
+  def remove_project_message(project)
+    "You are going to remove #{project.name_with_namespace}.\n Removed project CANNOT be restored!\n Are you ABSOLUTELY sure?"
+  end
+
+  def transfer_project_message(project)
+    "You are going to transfer #{project.name_with_namespace} to another owner. Are you ABSOLUTELY sure?"
+  end
+
+  def project_nav_tabs
+    @nav_tabs ||= get_project_nav_tabs(@project, current_user)
+  end
+
+  def project_nav_tab?(name)
+    project_nav_tabs.include? name
+  end
+
+  def project_active_milestones
+    @project.milestones.active.order("due_date, title ASC")
+  end
+
+  def project_for_deploy_key(deploy_key)
+    if deploy_key.projects.include?(@project)
+      @project
+    else
+      deploy_key.projects.find { |project| can?(current_user, :read_project, project) }
+    end
+  end
+
+  def can_change_visibility_level?(project, current_user)
+    return false unless can?(current_user, :change_visibility_level, project)
+
+    if project.forked?
+      project.forked_from_project.visibility_level > Gitlab::VisibilityLevel::PRIVATE
+    else
+      true
+    end
+  end
+
+  private
+
+  def get_project_nav_tabs(project, current_user)
+    nav_tabs = [:home]
+
+    if !project.empty_repo? && can?(current_user, :download_code, project)
+      nav_tabs << [:files, :commits, :network, :graphs]
+    end
+
+    if project.repo_exists? && can?(current_user, :read_merge_request, project)
+      nav_tabs << :merge_requests
+    end
+
+    if can?(current_user, :admin_project, project)
+      nav_tabs << :settings
+    end
+
+    if can?(current_user, :read_issue, project)
+      nav_tabs << :issues
+    end
+
+    if can?(current_user, :read_wiki, project)
+      nav_tabs << :wiki
+    end
+
+    if can?(current_user, :read_project_snippet, project)
+      nav_tabs << :snippets
+    end
+
+    if can?(current_user, :read_label, project)
+      nav_tabs << :labels
+    end
+
+    if can?(current_user, :read_milestone, project)
+      nav_tabs << :milestones
+    end
+
+    nav_tabs.flatten
+  end
+
+  def git_user_name
+    if current_user
+      current_user.name
+    else
+      "Your name"
+    end
+  end
+
+  def git_user_email
+    if current_user
+      current_user.email
+    else
+      "your@email.com"
+    end
+  end
+
+  def repository_size(project = nil)
+    "#{(project || @project).repository_size} MB"
+  rescue
+    # In order to prevent 500 error
+    # when application cannot allocate memory
+    # to calculate repo size - just show 'Unknown'
+    'unknown'
+  end
+
+  def default_url_to_repo(project = nil)
+    project = project || @project
+    current_user ? project.url_to_repo : project.http_url_to_repo
+  end
+
+  def default_clone_protocol
+    current_user ? "ssh" : "http"
+  end
+
+  def project_last_activity(project)
+    if project.last_activity_at
+      time_ago_with_tooltip(project.last_activity_at, placement: 'bottom', html_class: 'last_activity_time_ago')
+    else
+      "Never"
+    end
+  end
+
+  def add_contribution_guide_path(project)
+    if project && !project.repository.contribution_guide
+      namespace_project_new_blob_path(
+        project.namespace,
+        project,
+        project.default_branch,
+        file_name:      "CONTRIBUTING.md",
+        commit_message: "Add contribution guide"
+      )
+    end
+  end
+
+  def add_changelog_path(project)
+    if project && !project.repository.changelog
+      namespace_project_new_blob_path(
+        project.namespace,
+        project,
+        project.default_branch,
+        file_name:      "CHANGELOG",
+        commit_message: "Add changelog"
+      )
+    end
+  end
+
+  def add_license_path(project)
+    if project && !project.repository.license
+      namespace_project_new_blob_path(
+        project.namespace,
+        project,
+        project.default_branch,
+        file_name:      "LICENSE",
+        commit_message: "Add license"
+      )
+    end
+  end
+
+  def contribution_guide_path(project)
+    if project && contribution_guide = project.repository.contribution_guide
+      namespace_project_blob_path(
+        project.namespace,
+        project,
+        tree_join(project.default_branch,
+                  contribution_guide.name)
+      )
+    end
+  end
+
+  def readme_path(project)
+    filename_path(project, :readme)
+  end
+
+  def changelog_path(project)
+    filename_path(project, :changelog)
+  end
+
+  def license_path(project)
+    filename_path(project, :license)
+  end
+
+  def version_path(project)
+    filename_path(project, :version)
+  end
+
+  def hidden_pass_url(original_url)
+    result = URI(original_url)
+    result.password = '*****' unless result.password.nil?
+    result
+  rescue
+    original_url
+  end
+
+  def project_wiki_path_with_version(proj, page, version, is_newest)
+    url_params = is_newest ? {} : { version_id: version }
+    namespace_project_wiki_path(proj.namespace, proj, page, url_params)
+  end
+
+  def project_status_css_class(status)
+    case status
+    when "started"
+      "active"
+    when "failed"
+      "danger"
+    when "finished"
+      "success"
+    end
+  end
+
+  def user_max_access_in_project(user, project)
+    level = project.team.max_member_access(user)
+
+    if level
+      Gitlab::Access.options_with_owner.key(level)
+    end
+  end
+
+  def leave_project_message(project)
+    "Are you sure you want to leave \"#{project.name}\" project?"
+  end
+
+  def new_readme_path
+    ref = @repository.root_ref if @repository
+    ref ||= 'master'
+
+    namespace_project_new_blob_path(@project.namespace, @project, tree_join(ref), file_name: 'README.md')
+  end
+
+  def last_push_event
+    if current_user
+      current_user.recent_push(@project.id)
+    end
+  end
+
+  def readme_cache_key
+    sha = @project.commit.try(:sha) || 'nil'
+    [@project.id, sha, "readme"].join('-')
+  end
+
+  def round_commit_count(project)
+    count = project.commit_count
+
+    if count > 10000
+      '10000+'
+    elsif count > 5000
+      '5000+'
+    elsif count > 1000
+      '1000+'
+    else
+      count
+    end
+  end
+
+  private
+
+  def filename_path(project, filename)
+    if project && blob = project.repository.send(filename)
+      namespace_project_blob_path(
+          project.namespace,
+          project,
+          tree_join(project.default_branch,
+                    blob.name)
+      )
+    end
+  end
+end
diff --git a/app/helpers/search_helper.rb b/app/helpers/search_helper.rb
new file mode 100644
index 00000000000..c31a556ff7b
--- /dev/null
+++ b/app/helpers/search_helper.rb
@@ -0,0 +1,112 @@
+module SearchHelper
+  def search_autocomplete_opts(term)
+    return unless current_user
+
+    resources_results = [
+      groups_autocomplete(term),
+      projects_autocomplete(term)
+    ].flatten
+
+    generic_results = project_autocomplete + default_autocomplete + help_autocomplete
+    generic_results.select! { |result| result[:label] =~ Regexp.new(term, "i") }
+
+    [
+      resources_results,
+      generic_results
+    ].flatten.uniq do |item|
+      item[:label]
+    end
+  end
+
+  private
+
+  # Autocomplete results for various settings pages
+  def default_autocomplete
+    [
+      { label: "Profile settings", url: profile_path },
+      { label: "SSH Keys",         url: profile_keys_path },
+      { label: "Dashboard",        url: root_path },
+      { label: "Admin Section",       url: admin_root_path },
+    ]
+  end
+
+  # Autocomplete results for internal help pages
+  def help_autocomplete
+    [
+      { label: "help: API Help",           url: help_page_path("api", "README") },
+      { label: "help: Markdown Help",      url: help_page_path("markdown", "markdown") },
+      { label: "help: Permissions Help",   url: help_page_path("permissions", "permissions") },
+      { label: "help: Public Access Help", url: help_page_path("public_access", "public_access") },
+      { label: "help: Rake Tasks Help",    url: help_page_path("raketasks", "README") },
+      { label: "help: SSH Keys Help",      url: help_page_path("ssh", "README") },
+      { label: "help: System Hooks Help",  url: help_page_path("system_hooks", "system_hooks") },
+      { label: "help: Web Hooks Help",     url: help_page_path("web_hooks", "web_hooks") },
+      { label: "help: Workflow Help",      url: help_page_path("workflow", "README") },
+    ]
+  end
+
+  # Autocomplete results for the current project, if it's defined
+  def project_autocomplete
+    if @project && @project.repository.exists? && @project.repository.root_ref
+      prefix = search_result_sanitize(@project.name_with_namespace)
+      ref    = @ref || @project.repository.root_ref
+
+      [
+        { label: "#{prefix} - Files",          url: namespace_project_tree_path(@project.namespace, @project, ref) },
+        { label: "#{prefix} - Commits",        url: namespace_project_commits_path(@project.namespace, @project, ref) },
+        { label: "#{prefix} - Network",        url: namespace_project_network_path(@project.namespace, @project, ref) },
+        { label: "#{prefix} - Graph",          url: namespace_project_graph_path(@project.namespace, @project, ref) },
+        { label: "#{prefix} - Issues",         url: namespace_project_issues_path(@project.namespace, @project) },
+        { label: "#{prefix} - Merge Requests", url: namespace_project_merge_requests_path(@project.namespace, @project) },
+        { label: "#{prefix} - Milestones",     url: namespace_project_milestones_path(@project.namespace, @project) },
+        { label: "#{prefix} - Snippets",       url: namespace_project_snippets_path(@project.namespace, @project) },
+        { label: "#{prefix} - Members",        url: namespace_project_project_members_path(@project.namespace, @project) },
+        { label: "#{prefix} - Wiki",           url: namespace_project_wikis_path(@project.namespace, @project) },
+      ]
+    else
+      []
+    end
+  end
+
+  # Autocomplete results for the current user's groups
+  def groups_autocomplete(term, limit = 5)
+    current_user.authorized_groups.search(term).limit(limit).map do |group|
+      {
+        label: "group: #{search_result_sanitize(group.name)}",
+        url: group_path(group)
+      }
+    end
+  end
+
+  # Autocomplete results for the current user's projects
+  def projects_autocomplete(term, limit = 5)
+    ProjectsFinder.new.execute(current_user).search_by_title(term).
+      sorted_by_stars.non_archived.limit(limit).map do |p|
+      {
+        label: "project: #{search_result_sanitize(p.name_with_namespace)}",
+        url: namespace_project_path(p.namespace, p)
+      }
+    end
+  end
+
+  def search_result_sanitize(str)
+    Sanitize.clean(str)
+  end
+
+  def search_filter_path(options={})
+    exist_opts = {
+      search: params[:search],
+      project_id: params[:project_id],
+      group_id: params[:group_id],
+      scope: params[:scope]
+    }
+
+    options = exist_opts.merge(options)
+    search_path(options)
+  end
+
+  # Sanitize html generated after parsing markdown from issue description or comment
+  def search_md_sanitize(html)
+    sanitize(html, tags: %w(a p ol ul li pre code))
+  end
+end
diff --git a/app/helpers/selects_helper.rb b/app/helpers/selects_helper.rb
new file mode 100644
index 00000000000..12fce8db701
--- /dev/null
+++ b/app/helpers/selects_helper.rb
@@ -0,0 +1,45 @@
+module SelectsHelper
+  def users_select_tag(id, opts = {})
+    css_class = "ajax-users-select "
+    css_class << "multiselect " if opts[:multiple]
+    css_class << (opts[:class] || '')
+    value = opts[:selected] || ''
+    placeholder = opts[:placeholder] || 'Search for a user'
+
+    null_user = opts[:null_user] || false
+    any_user = opts[:any_user] || false
+    email_user = opts[:email_user] || false
+    first_user = opts[:first_user] && current_user ? current_user.username : false
+    current_user = opts[:current_user] || false
+    project = opts[:project] || @project
+
+    html = {
+      class: css_class,
+      'data-placeholder' => placeholder,
+      'data-null-user' => null_user,
+      'data-any-user' => any_user,
+      'data-email-user' => email_user,
+      'data-first-user' => first_user,
+      'data-current-user' => current_user
+    }
+
+    unless opts[:scope] == :all
+      if project
+        html['data-project-id'] = project.id
+      elsif @group
+        html['data-group-id'] = @group.id
+      end
+    end
+
+    hidden_field_tag(id, value, html)
+  end
+
+  def groups_select_tag(id, opts = {})
+    css_class = "ajax-groups-select "
+    css_class << "multiselect " if opts[:multiple]
+    css_class << (opts[:class] || '')
+    value = opts[:selected] || ''
+
+    hidden_field_tag(id, value, class: css_class)
+  end
+end
diff --git a/app/helpers/snippets_helper.rb b/app/helpers/snippets_helper.rb
new file mode 100644
index 00000000000..906cb12cd48
--- /dev/null
+++ b/app/helpers/snippets_helper.rb
@@ -0,0 +1,20 @@
+module SnippetsHelper
+  def lifetime_select_options
+    options = [
+        ['forever', nil],
+        ['1 day',   "#{Date.current + 1.day}"],
+        ['1 week',  "#{Date.current + 1.week}"],
+        ['1 month', "#{Date.current + 1.month}"]
+    ]
+    options_for_select(options)
+  end
+
+  def reliable_snippet_path(snippet)
+    if snippet.project_id?
+      namespace_project_snippet_path(snippet.project.namespace,
+                                     snippet.project, snippet)
+    else
+      snippet_path(snippet)
+    end
+  end
+end
diff --git a/app/helpers/sorting_helper.rb b/app/helpers/sorting_helper.rb
new file mode 100644
index 00000000000..bb12d43f397
--- /dev/null
+++ b/app/helpers/sorting_helper.rb
@@ -0,0 +1,96 @@
+module SortingHelper
+  def sort_options_hash
+    {
+      sort_value_name => sort_title_name,
+      sort_value_recently_updated => sort_title_recently_updated,
+      sort_value_oldest_updated => sort_title_oldest_updated,
+      sort_value_recently_created => sort_title_recently_created,
+      sort_value_oldest_created => sort_title_oldest_created,
+      sort_value_milestone_soon => sort_title_milestone_soon,
+      sort_value_milestone_later => sort_title_milestone_later,
+      sort_value_largest_repo => sort_title_largest_repo,
+      sort_value_recently_signin => sort_title_recently_signin,
+      sort_value_oldest_signin => sort_title_oldest_signin,
+    }
+  end
+
+  def sort_title_oldest_updated
+    'Oldest updated'
+  end
+
+  def sort_title_recently_updated
+    'Recently updated'
+  end
+
+  def sort_title_oldest_created
+    'Oldest created'
+  end
+
+  def sort_title_recently_created
+    'Recently created'
+  end
+
+  def sort_title_milestone_soon
+    'Milestone due soon'
+  end
+
+  def sort_title_milestone_later
+    'Milestone due later'
+  end
+
+  def sort_title_name
+    'Name'
+  end
+
+  def sort_title_largest_repo
+    'Largest repository'
+  end
+
+  def sort_title_recently_signin
+    'Recent sign in'
+  end
+
+  def sort_title_oldest_signin
+    'Oldest sign in'
+  end
+
+  def sort_value_oldest_updated
+    'updated_asc'
+  end
+
+  def sort_value_recently_updated
+    'updated_desc'
+  end
+
+  def sort_value_oldest_created
+    'created_asc'
+  end
+
+  def sort_value_recently_created
+    'created_desc'
+  end
+
+  def sort_value_milestone_soon
+    'milestone_due_asc'
+  end
+
+  def sort_value_milestone_later
+    'milestone_due_desc'
+  end
+
+  def sort_value_name
+    'name_asc'
+  end
+
+  def sort_value_largest_repo
+    'repository_size_desc'
+  end
+
+  def sort_value_recently_signin
+    'recent_sign_in'
+  end
+
+  def sort_value_oldest_signin
+    'oldest_sign_in'
+  end
+end
diff --git a/app/helpers/submodule_helper.rb b/app/helpers/submodule_helper.rb
new file mode 100644
index 00000000000..b3f50ceebe4
--- /dev/null
+++ b/app/helpers/submodule_helper.rb
@@ -0,0 +1,74 @@
+module SubmoduleHelper
+  include Gitlab::ShellAdapter
+
+  # links to files listing for submodule if submodule is a project on this server
+  def submodule_links(submodule_item, ref = nil, repository = @repository)
+    url = repository.submodule_url_for(ref, submodule_item.path)
+
+    return url, nil unless url =~ /([^\/:]+)\/([^\/]+\.git)\Z/
+
+    namespace = $1
+    project = $2
+    project.chomp!('.git')
+
+    if self_url?(url, namespace, project)
+      return namespace_project_path(namespace, project),
+        namespace_project_tree_path(namespace, project,
+                                    submodule_item.id)
+    elsif relative_self_url?(url)
+      relative_self_links(url, submodule_item.id)
+    elsif github_dot_com_url?(url)
+      standard_links('github.com', namespace, project, submodule_item.id)
+    elsif gitlab_dot_com_url?(url)
+      standard_links('gitlab.com', namespace, project, submodule_item.id)
+    else
+      return url, nil
+    end
+  end
+
+  protected
+
+  def github_dot_com_url?(url)
+    url =~ /github\.com[\/:][^\/]+\/[^\/]+\Z/
+  end
+
+  def gitlab_dot_com_url?(url)
+    url =~ /gitlab\.com[\/:][^\/]+\/[^\/]+\Z/
+  end
+
+  def self_url?(url, namespace, project)
+    return true if url == [ Gitlab.config.gitlab.url, '/', namespace, '/',
+                            project, '.git' ].join('')
+    url == gitlab_shell.url_to_repo([namespace, '/', project].join(''))
+  end
+
+  def relative_self_url?(url)
+    # (./)?(../repo.git) || (./)?(../../project/repo.git) )
+    url =~ /\A((\.\/)?(\.\.\/))(?!(\.\.)|(.*\/)).*\.git\z/ || url =~ /\A((\.\/)?(\.\.\/){2})(?!(\.\.))([^\/]*)\/(?!(\.\.)|(.*\/)).*\.git\z/
+  end
+
+  def standard_links(host, namespace, project, commit)
+    base = [ 'https://', host, '/', namespace, '/', project ].join('')
+    [base, [ base, '/tree/', commit ].join('')]
+  end
+
+  def relative_self_links(url, commit)
+    # Map relative links to a namespace and project
+    # For example:
+    # ../bar.git -> same namespace, repo bar
+    # ../foo/bar.git -> namespace foo, repo bar
+    # ../../foo/bar/baz.git -> namespace bar, repo baz
+    components = url.split('/')
+    base = components.pop.gsub(/.git$/, '')
+    namespace = components.pop.gsub(/^\.\.$/, '')
+
+    if namespace.empty?
+      namespace = @project.namespace.path
+    end
+
+    [
+      namespace_project_path(namespace, base),
+      namespace_project_tree_path(namespace, base, commit)
+    ]
+  end
+end
diff --git a/app/helpers/tab_helper.rb b/app/helpers/tab_helper.rb
new file mode 100644
index 00000000000..0e7d8065ac7
--- /dev/null
+++ b/app/helpers/tab_helper.rb
@@ -0,0 +1,131 @@
+module TabHelper
+  # Navigation link helper
+  #
+  # Returns an `li` element with an 'active' class if the supplied
+  # controller(s) and/or action(s) are currently active. The content of the
+  # element is the value passed to the block.
+  #
+  # options - The options hash used to determine if the element is "active" (default: {})
+  #           :controller   - One or more controller names to check (optional).
+  #           :action       - One or more action names to check (optional).
+  #           :path         - A shorthand path, such as 'dashboard#index', to check (optional).
+  #           :html_options - Extra options to be passed to the list element (optional).
+  # block   - An optional block that will become the contents of the returned
+  #           `li` element.
+  #
+  # When both :controller and :action are specified, BOTH must match in order
+  # to be marked as active. When only one is given, either can match.
+  #
+  # Examples
+  #
+  #   # Assuming we're on TreeController#show
+  #
+  #   # Controller matches, but action doesn't
+  #   nav_link(controller: [:tree, :refs], action: :edit) { "Hello" }
+  #   # => '<li>Hello</li>'
+  #
+  #   # Controller matches
+  #   nav_link(controller: [:tree, :refs]) { "Hello" }
+  #   # => '<li class="active">Hello</li>'
+  #
+  #   # Several paths
+  #   nav_link(path: ['tree#show', 'profile#show']) { "Hello" }
+  #   # => '<li class="active">Hello</li>'
+  #
+  #   # Shorthand path
+  #   nav_link(path: 'tree#show') { "Hello" }
+  #   # => '<li class="active">Hello</li>'
+  #
+  #   # Supplying custom options for the list element
+  #   nav_link(controller: :tree, html_options: {class: 'home'}) { "Hello" }
+  #   # => '<li class="home active">Hello</li>'
+  #
+  # Returns a list item element String
+  def nav_link(options = {}, &block)
+    klass = active_nav_link?(options) ? 'active' : ''
+
+    # Add our custom class into the html_options, which may or may not exist
+    # and which may or may not already have a :class key
+    o = options.delete(:html_options) || {}
+    o[:class] ||= ''
+    o[:class] += ' ' + klass
+    o[:class].strip!
+
+    if block_given?
+      content_tag(:li, capture(&block), o)
+    else
+      content_tag(:li, nil, o)
+    end
+  end
+
+  def active_nav_link?(options)
+    if path = options.delete(:path)
+      unless path.respond_to?(:each)
+        path = [path]
+      end
+
+      path.any? do |single_path|
+        current_path?(single_path)
+      end
+    elsif page = options.delete(:page)
+      unless page.respond_to?(:each)
+        page = [page]
+      end
+
+      page.any? do |single_page|
+        current_page?(single_page)
+      end
+    else
+      c = options.delete(:controller)
+      a = options.delete(:action)
+
+      if c && a
+        # When given both options, make sure BOTH are true
+        current_controller?(*c) && current_action?(*a)
+      else
+        # Otherwise check EITHER option
+        current_controller?(*c) || current_action?(*a)
+      end
+    end
+  end
+
+  def current_path?(path)
+    c, a, _ = path.split('#')
+    current_controller?(c) && current_action?(a)
+  end
+
+  def project_tab_class
+    return "active" if current_page?(controller: "/projects", action: :edit, id: @project)
+
+    if ['services', 'hooks', 'deploy_keys', 'protected_branches'].include? controller.controller_name
+      "active"
+    end
+  end
+
+  def branches_tab_class
+    if current_controller?(:protected_branches) ||
+      current_controller?(:branches) ||
+      current_page?(namespace_project_repository_path(@project.namespace,
+                                                      @project))
+      'active'
+    end
+  end
+
+  # Use nav_tab for save controller/action  but different params
+  def nav_tab(key, value, &block)
+    o = {}
+    o[:class] = ""
+
+    if value.nil?
+      o[:class] << " active" if params[key].blank?
+    else
+      o[:class] << " active" if params[key] == value
+    end
+
+    if block_given?
+      content_tag(:li, capture(&block), o)
+    else
+      content_tag(:li, nil, o)
+    end
+  end
+end
diff --git a/app/helpers/tags_helper.rb b/app/helpers/tags_helper.rb
new file mode 100644
index 00000000000..fb85544df2d
--- /dev/null
+++ b/app/helpers/tags_helper.rb
@@ -0,0 +1,14 @@
+module TagsHelper
+  def tag_path(tag)
+    "/tags/#{tag}"
+  end
+
+  def tag_list(project)
+    html = ''
+    project.tag_list.each do |tag|
+      html << link_to(tag, tag_path(tag))
+    end
+
+    html.html_safe
+  end
+end
diff --git a/app/helpers/tree_helper.rb b/app/helpers/tree_helper.rb
new file mode 100644
index 00000000000..03a49e119b8
--- /dev/null
+++ b/app/helpers/tree_helper.rb
@@ -0,0 +1,88 @@
+module TreeHelper
+  # Sorts a repository's tree so that folders are before files and renders
+  # their corresponding partials
+  #
+  # contents - A Grit::Tree object for the current tree
+  def render_tree(tree)
+    # Render Folders before Files/Submodules
+    folders, files, submodules = tree.trees, tree.blobs, tree.submodules
+
+    tree = ""
+
+    # Render folders if we have any
+    tree << render(partial: 'projects/tree/tree_item', collection: folders,
+                   locals: { type: 'folder' }) if folders.present?
+
+    # Render files if we have any
+    tree << render(partial: 'projects/tree/blob_item', collection: files,
+                   locals: { type: 'file' }) if files.present?
+
+    # Render submodules if we have any
+    tree << render(partial: 'projects/tree/submodule_item',
+                   collection: submodules) if submodules.present?
+
+    tree.html_safe
+  end
+
+  def render_readme(readme)
+    render_markup(readme.name, readme.data)
+  end
+
+  # Return an image icon depending on the file type and mode
+  #
+  # type - String type of the tree item; either 'folder' or 'file'
+  # mode - File unix mode
+  # name - File name
+  def tree_icon(type, mode, name)
+    icon("#{file_type_icon_class(type, mode, name)} fw")
+  end
+
+  def tree_hex_class(content)
+    "file_#{hexdigest(content.name)}"
+  end
+
+  # Simple shortcut to File.join
+  def tree_join(*args)
+    File.join(*args)
+  end
+
+  def allowed_tree_edit?(project = nil, ref = nil)
+    project ||= @project
+    ref ||= @ref
+    return false unless project.repository.branch_names.include?(ref)
+
+    ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(ref)
+  end
+
+  def tree_breadcrumbs(tree, max_links = 2)
+    if @path.present?
+      part_path = ""
+      parts = @path.split('/')
+
+      yield('..', nil) if parts.count > max_links
+
+      parts.each do |part|
+        part_path = File.join(part_path, part) unless part_path.empty?
+        part_path = part if part_path.empty?
+
+        next unless parts.last(2).include?(part) if parts.count > max_links
+        yield(part, tree_join(@ref, part_path))
+      end
+    end
+  end
+
+  def up_dir_path
+    file = File.join(@path, "..")
+    tree_join(@ref, file)
+  end
+
+  # returns the relative path of the first subdir that doesn't have only one directory descendant
+  def flatten_tree(tree)
+    subtree = Gitlab::Git::Tree.where(@repository, @commit.id, tree.path)
+    if subtree.count == 1 && subtree.first.dir?
+      return tree_join(tree.name, flatten_tree(subtree.first))
+    else
+      return tree.name
+    end
+  end
+end
diff --git a/app/helpers/version_check_helper.rb b/app/helpers/version_check_helper.rb
new file mode 100644
index 00000000000..f64d730b448
--- /dev/null
+++ b/app/helpers/version_check_helper.rb
@@ -0,0 +1,7 @@
+module VersionCheckHelper
+  def version_status_badge
+    if Rails.env.production?
+      image_tag VersionCheck.new.url
+    end
+  end
+end
diff --git a/app/helpers/visibility_level_helper.rb b/app/helpers/visibility_level_helper.rb
new file mode 100644
index 00000000000..b52cd23aba2
--- /dev/null
+++ b/app/helpers/visibility_level_helper.rb
@@ -0,0 +1,95 @@
+module VisibilityLevelHelper
+  def visibility_level_color(level)
+    case level
+    when Gitlab::VisibilityLevel::PRIVATE
+      'vs-private'
+    when Gitlab::VisibilityLevel::INTERNAL
+      'vs-internal'
+    when Gitlab::VisibilityLevel::PUBLIC
+      'vs-public'
+    end
+  end
+
+  # Return the description for the +level+ argument.
+  #
+  # +level+ One of the Gitlab::VisibilityLevel constants
+  # +form_model+ Either a model object (Project, Snippet, etc.) or the name of
+  #              a Project or Snippet class.
+  def visibility_level_description(level, form_model)
+    case form_model.is_a?(String) ? form_model : form_model.class.name
+    when 'PersonalSnippet', 'ProjectSnippet', 'Snippet'
+      snippet_visibility_level_description(level)
+    when 'Project'
+      project_visibility_level_description(level)
+    end
+  end
+
+  def project_visibility_level_description(level)
+    capture_haml do
+      haml_tag :span do
+        case level
+        when Gitlab::VisibilityLevel::PRIVATE
+          haml_concat "Project access must be granted explicitly for each user."
+        when Gitlab::VisibilityLevel::INTERNAL
+          haml_concat "The project can be cloned by"
+          haml_concat "any logged in user."
+        when Gitlab::VisibilityLevel::PUBLIC
+          haml_concat "The project can be cloned"
+          haml_concat "without any"
+          haml_concat "authentication."
+        end
+      end
+    end
+  end
+
+  def snippet_visibility_level_description(level)
+    capture_haml do
+      haml_tag :span do
+        case level
+        when Gitlab::VisibilityLevel::PRIVATE
+          haml_concat "The snippet is visible only for me."
+        when Gitlab::VisibilityLevel::INTERNAL
+          haml_concat "The snippet is visible for any logged in user."
+        when Gitlab::VisibilityLevel::PUBLIC
+          haml_concat "The snippet can be accessed"
+          haml_concat "without any"
+          haml_concat "authentication."
+        end
+      end
+    end
+  end
+
+  def visibility_level_icon(level)
+    case level
+    when Gitlab::VisibilityLevel::PRIVATE
+      private_icon
+    when Gitlab::VisibilityLevel::INTERNAL
+      internal_icon
+    when Gitlab::VisibilityLevel::PUBLIC
+      public_icon
+    end
+  end
+
+  def visibility_level_label(level)
+    Project.visibility_levels.key(level)
+  end
+
+  def restricted_visibility_levels(show_all = false)
+    return [] if current_user.is_admin? && !show_all
+    current_application_settings.restricted_visibility_levels || []
+  end
+
+  def default_project_visibility
+    current_application_settings.default_project_visibility
+  end
+
+  def default_snippet_visibility
+    current_application_settings.default_snippet_visibility
+  end
+
+  def skip_level?(form_model, level)
+    form_model.is_a?(Project) &&
+    form_model.forked? &&
+    !Gitlab::VisibilityLevel.allowed_fork_levels(form_model.forked_from_project.visibility_level).include?(level)
+  end
+end
diff --git a/app/mailers/base_mailer.rb b/app/mailers/base_mailer.rb
index 2b650bc6eac..aedb0889185 100644
--- a/app/mailers/base_mailer.rb
+++ b/app/mailers/base_mailer.rb
@@ -1,6 +1,6 @@
 class BaseMailer < ActionMailer::Base
-  add_template_helper Gitlab::ApplicationHelper
-  add_template_helper Gitlab::GitlabMarkdownHelper
+  add_template_helper ApplicationHelper
+  add_template_helper GitlabMarkdownHelper
 
   attr_accessor :current_user
   helper_method :current_user, :can?
diff --git a/app/mailers/notify.rb b/app/mailers/notify.rb
index 38afb49c78c..f196ffd53f3 100644
--- a/app/mailers/notify.rb
+++ b/app/mailers/notify.rb
@@ -8,8 +8,8 @@ class Notify < BaseMailer
   include Emails::Profile
   include Emails::Groups
 
-  add_template_helper Gitlab::MergeRequestsHelper
-  add_template_helper Gitlab::EmailsHelper
+  add_template_helper MergeRequestsHelper
+  add_template_helper EmailsHelper
 
   def test_email(recipient_email, subject, body)
     mail(to: recipient_email,
@@ -100,7 +100,7 @@ class Notify < BaseMailer
 
   def mail_thread(model, headers = {})
     if @project
-      headers['X-GitLab-Project'] = @project.name 
+      headers['X-GitLab-Project'] = @project.name
       headers['X-GitLab-Project-Id'] = @project.id
       headers['X-GitLab-Project-Path'] = @project.path_with_namespace
     end