Groundwork for merging CI into CE

97 files changed, 3676 insertions, 3196 deletions

diff --git a/app/helpers/appearances_helper.rb b/app/helpers/appearances_helper.rb
deleted file mode 100644
index 14df8d4cbd7..00000000000
--- a/app/helpers/appearances_helper.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-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
deleted file mode 100644
index a803b66c502..00000000000
--- a/app/helpers/application_helper.rb
+++ /dev/null
@@ -1,315 +0,0 @@
-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
deleted file mode 100644
index 7d6b58ee21a..00000000000
--- a/app/helpers/application_settings_helper.rb
+++ /dev/null
@@ -1,59 +0,0 @@
-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
deleted file mode 100644
index 0e7a37b4cc6..00000000000
--- a/app/helpers/auth_helper.rb
+++ /dev/null
@@ -1,50 +0,0 @@
-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(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
deleted file mode 100644
index 77d99140c43..00000000000
--- a/app/helpers/blob_helper.rb
+++ /dev/null
@@ -1,74 +0,0 @@
-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
deleted file mode 100644
index d6eaa7d57bc..00000000000
--- a/app/helpers/branches_helper.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-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
deleted file mode 100644
index 6484dca6b55..00000000000
--- a/app/helpers/broadcast_messages_helper.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-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/ci/application_helper.rb b/app/helpers/ci/application_helper.rb
new file mode 100644
index 00000000000..3198fe55f91
--- /dev/null
+++ b/app/helpers/ci/application_helper.rb
@@ -0,0 +1,140 @@
+module Ci
+  module ApplicationHelper
+    def loader_html
+      image_tag 'ci/loader.gif', alt: 'Loading'
+    end
+
+    # 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>'
+    #
+    #   # 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)
+      if path = options.delete(:path)
+        if path.respond_to?(:each)
+          c = path.map { |p| p.split('#').first }
+          a = path.map { |p| p.split('#').last }
+        else
+          c, a, _ = path.split('#')
+        end
+      else
+        c = options.delete(:controller)
+        a = options.delete(:action)
+      end
+
+      if c && a
+        # When given both options, make sure BOTH are active
+        klass = current_controller?(*c) && current_action?(*a) ? 'active' : ''
+      else
+        # Otherwise check EITHER option
+        klass = current_controller?(*c) || current_action?(*a) ? 'active' : ''
+      end
+
+      # 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
+
+    # 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 date_from_to(from, to)
+      "#{from.to_s(:short)} - #{to.to_s(:short)}"
+    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
+
+    def duration_in_words(finished_at, started_at)
+      if finished_at && started_at
+        interval_in_seconds = finished_at.to_i - started_at.to_i
+      elsif started_at
+        interval_in_seconds = Time.now.to_i - started_at.to_i
+      end
+
+      time_interval_in_words(interval_in_seconds)
+    end
+
+    def time_interval_in_words(interval_in_seconds)
+      minutes = interval_in_seconds / 60
+      seconds = interval_in_seconds - minutes * 60
+
+      if minutes >= 1
+        "#{pluralize(minutes, "minute")} #{pluralize(seconds, "second")}"
+      else
+        "#{pluralize(seconds, "second")}"
+      end
+    end
+  end
+end
diff --git a/app/helpers/ci/builds_helper.rb b/app/helpers/ci/builds_helper.rb
new file mode 100644
index 00000000000..cdabdad17d2
--- /dev/null
+++ b/app/helpers/ci/builds_helper.rb
@@ -0,0 +1,41 @@
+module Ci
+  module BuildsHelper
+    def build_ref_link build
+      gitlab_ref_link build.project, build.ref
+    end
+
+    def build_compare_link build
+      gitlab_compare_link build.project, build.commit.short_before_sha, build.short_sha
+    end
+
+    def build_commit_link build
+      gitlab_commit_link build.project, build.short_sha
+    end
+
+    def build_url(build)
+      ci_project_build_url(build.project, build)
+    end
+
+    def build_status_alert_class(build)
+      if build.success?
+        'alert-success'
+      elsif build.failed?
+        'alert-danger'
+      elsif build.canceled?
+        'alert-disabled'
+      else
+        'alert-warning'
+      end
+    end
+
+    def build_icon_css_class(build)
+      if build.success?
+        'fa-circle cgreen'
+      elsif build.failed?
+        'fa-circle cred'
+      else
+        'fa-circle light'
+      end
+    end
+  end
+end
diff --git a/app/helpers/ci/commits_helper.rb b/app/helpers/ci/commits_helper.rb
new file mode 100644
index 00000000000..0479bc10594
--- /dev/null
+++ b/app/helpers/ci/commits_helper.rb
@@ -0,0 +1,26 @@
+module Ci
+  module CommitsHelper
+    def commit_status_alert_class(commit)
+      return unless commit
+
+      case commit.status
+      when 'success'
+        'alert-success'
+      when 'failed', 'canceled'
+        'alert-danger'
+      when 'skipped'
+        'alert-disabled'
+      else
+        'alert-warning'
+      end
+    end
+
+    def commit_link(commit)
+      link_to(commit.short_sha, ci_project_ref_commit_path(commit.project, commit.ref, commit.sha))
+    end
+
+    def truncate_first_line(message, length = 50)
+      truncate(message.each_line.first.chomp, length: length) if message
+    end
+  end
+end
diff --git a/app/helpers/ci/gitlab_helper.rb b/app/helpers/ci/gitlab_helper.rb
new file mode 100644
index 00000000000..2b89a0ce93e
--- /dev/null
+++ b/app/helpers/ci/gitlab_helper.rb
@@ -0,0 +1,36 @@
+module Ci
+  module GitlabHelper
+    def no_turbolink
+      { :"data-no-turbolink" => "data-no-turbolink" }
+    end
+
+    def gitlab_ref_link project, ref
+      gitlab_url = project.gitlab_url.dup
+      gitlab_url << "/commits/#{ref}"
+      link_to ref, gitlab_url, no_turbolink
+    end
+
+    def gitlab_compare_link project, before, after
+      gitlab_url = project.gitlab_url.dup
+      gitlab_url << "/compare/#{before}...#{after}"
+
+      link_to "#{before}...#{after}", gitlab_url, no_turbolink
+    end
+
+    def gitlab_commit_link project, sha
+      gitlab_url = project.gitlab_url.dup
+      gitlab_url << "/commit/#{sha}"
+      link_to Ci::Commit.truncate_sha(sha), gitlab_url, no_turbolink
+    end
+
+    def yaml_web_editor_link(project)
+      commits = project.commits
+
+      if commits.any? && commits.last.push_data[:ci_yaml_file]
+        "#{@project.gitlab_url}/edit/master/.gitlab-ci.yml"
+      else
+        "#{@project.gitlab_url}/new/master"
+      end
+    end
+  end
+end
diff --git a/app/helpers/ci/icons_helper.rb b/app/helpers/ci/icons_helper.rb
new file mode 100644
index 00000000000..ecb6ef7be45
--- /dev/null
+++ b/app/helpers/ci/icons_helper.rb
@@ -0,0 +1,11 @@
+module Ci
+  module IconsHelper
+    def boolean_to_icon(value)
+      if value.to_s == "true"
+        content_tag :i, nil, class: 'fa-circle cgreen'
+      else
+        content_tag :i, nil, class: 'fa-power-off clgray'
+      end
+    end
+  end
+end
diff --git a/app/helpers/ci/projects_helper.rb b/app/helpers/ci/projects_helper.rb
new file mode 100644
index 00000000000..fd991a4165a
--- /dev/null
+++ b/app/helpers/ci/projects_helper.rb
@@ -0,0 +1,36 @@
+module Ci
+  module ProjectsHelper
+    def ref_tab_class ref = nil
+      'active' if ref == @ref
+    end
+
+    def success_ratio(success_builds, failed_builds)
+      failed_builds = failed_builds.count(:all)
+      success_builds = success_builds.count(:all)
+
+      return 100 if failed_builds.zero?
+
+      ratio = (success_builds.to_f / (success_builds + failed_builds)) * 100
+      ratio.to_i
+    end
+
+    def markdown_badge_code(project, ref)
+      url = status_ci_project_url(project, ref: ref, format: 'png')
+      "[![build status](#{url})](#{ci_project_url(project, ref: ref)})"
+    end
+
+    def html_badge_code(project, ref)
+      url = status_ci_project_url(project, ref: ref, format: 'png')
+      "<a href='#{ci_project_url(project, ref: ref)}'><img src='#{url}' /></a>"
+    end
+
+    def project_uses_specific_runner?(project)
+      project.runners.any?
+    end
+
+    def no_runners_for_project?(project)
+      project.runners.blank? &&
+        Ci::Runner.shared.blank?
+    end
+  end
+end
diff --git a/app/helpers/ci/routes_helper.rb b/app/helpers/ci/routes_helper.rb
new file mode 100644
index 00000000000..f22d5023db5
--- /dev/null
+++ b/app/helpers/ci/routes_helper.rb
@@ -0,0 +1,29 @@
+module Ci
+  module RoutesHelper
+    class Base
+      include Gitlab::Application.routes.url_helpers
+
+      def default_url_options
+        {
+          host: Ci::Settings.gitlab_ci['host'],
+          protocol: Ci::Settings.gitlab_ci['https'] ? "https" : "http",
+          port: Ci::Settings.gitlab_ci['port']
+        }
+      end
+    end
+
+    def url_helpers
+      @url_helpers ||= Ci::Base.new
+    end
+
+    def self.method_missing(method, *args, &block)
+      @url_helpers ||= Ci::Base.new
+
+      if @url_helpers.respond_to?(method)
+        @url_helpers.send(method, *args, &block)
+      else
+        super method, *args, &block
+      end
+    end
+  end
+end
diff --git a/app/helpers/ci/runners_helper.rb b/app/helpers/ci/runners_helper.rb
new file mode 100644
index 00000000000..782208ddfe4
--- /dev/null
+++ b/app/helpers/ci/runners_helper.rb
@@ -0,0 +1,22 @@
+module Ci
+  module RunnersHelper
+    def runner_status_icon(runner)
+      unless runner.contacted_at
+        return content_tag :i, nil,
+          class: "fa-warning-sign",
+          title: "New runner. Has not connected yet"
+      end
+
+      status =
+        if runner.active?
+          runner.contacted_at > 3.hour.ago ? :online : :offline
+        else
+          :paused
+        end
+
+      content_tag :i, nil,
+        class: "fa-circle runner-status-#{status}",
+        title: "Runner is #{status}, last contact was #{time_ago_in_words(runner.contacted_at)} ago"
+    end
+  end
+end
diff --git a/app/helpers/ci/triggers_helper.rb b/app/helpers/ci/triggers_helper.rb
new file mode 100644
index 00000000000..caff54c3520
--- /dev/null
+++ b/app/helpers/ci/triggers_helper.rb
@@ -0,0 +1,7 @@
+module Ci
+  module TriggersHelper
+    def build_trigger_url(project_id, ref_name)
+      "#{Ci::Settings.gitlab_ci.url}/api/v1/projects/#{project_id}/refs/#{ref_name}/trigger"
+    end
+  end
+end
diff --git a/app/helpers/ci/user_helper.rb b/app/helpers/ci/user_helper.rb
new file mode 100644
index 00000000000..c332d6ed9cf
--- /dev/null
+++ b/app/helpers/ci/user_helper.rb
@@ -0,0 +1,15 @@
+module Ci
+  module UserHelper
+    def user_avatar_url(user = nil, size = nil, default = 'identicon')
+      size = 40 if size.nil? || size <= 0
+
+      if user.blank? || user.avatar_url.blank?
+        'ci/no_avatar.png'
+      elsif /^(http(s?):\/\/(www|secure)\.gravatar\.com\/avatar\/(\w*))/ =~ user.avatar_url
+        Regexp.last_match[0] + "?s=#{size}&d=#{default}"
+      else
+        user.avatar_url
+      end
+    end
+  end
+end
diff --git a/app/helpers/ci/user_sessions_helper.rb b/app/helpers/ci/user_sessions_helper.rb
new file mode 100644
index 00000000000..0296a74395c
--- /dev/null
+++ b/app/helpers/ci/user_sessions_helper.rb
@@ -0,0 +1,32 @@
+module Ci
+  module UserSessionsHelper
+    def generate_oauth_salt
+      SecureRandom.hex(16)
+    end
+
+    def generate_oauth_hmac(salt, return_to)
+      return unless return_to
+      digest = OpenSSL::Digest.new('sha256')
+      key = Gitlab::Application.secrets.db_key_base + salt
+      OpenSSL::HMAC.hexdigest(digest, key, return_to)
+    end
+
+    def generate_oauth_state(return_to)
+      return unless return_to
+      salt = generate_oauth_salt
+      hmac = generate_oauth_hmac(salt, return_to)
+      "#{salt}:#{hmac}:#{return_to}"
+    end
+
+    def get_ouath_state_return_to(state)
+      state.split(':', 3)[2] if state
+    end
+
+    def is_oauth_state_valid?(state)
+      return true unless state
+      salt, hmac, return_to = state.split(':', 3)
+      return false unless return_to
+      hmac == generate_oauth_hmac(salt, return_to)
+    end
+  end
+end
diff --git a/app/helpers/commits_helper.rb b/app/helpers/commits_helper.rb
deleted file mode 100644
index d13d80be293..00000000000
--- a/app/helpers/commits_helper.rb
+++ /dev/null
@@ -1,183 +0,0 @@
-# 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
deleted file mode 100644
index f1dc906cab4..00000000000
--- a/app/helpers/compare_helper.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-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
deleted file mode 100644
index c25b54eadc6..00000000000
--- a/app/helpers/dashboard_helper.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-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
deleted file mode 100644
index 1bd3ec5e0e0..00000000000
--- a/app/helpers/diff_helper.rb
+++ /dev/null
@@ -1,170 +0,0 @@
-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
diff --git a/app/helpers/emails_helper.rb b/app/helpers/emails_helper.rb
deleted file mode 100644
index 45788ba95ac..00000000000
--- a/app/helpers/emails_helper.rb
+++ /dev/null
@@ -1,57 +0,0 @@
-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
deleted file mode 100644
index 8428281f8f6..00000000000
--- a/app/helpers/events_helper.rb
+++ /dev/null
@@ -1,203 +0,0 @@
-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
diff --git a/app/helpers/explore_helper.rb b/app/helpers/explore_helper.rb
deleted file mode 100644
index 0d291f9a87e..00000000000
--- a/app/helpers/explore_helper.rb
+++ /dev/null
@@ -1,17 +0,0 @@
-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
deleted file mode 100644
index 838b85afdfe..00000000000
--- a/app/helpers/external_wiki_helper.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-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
deleted file mode 100644
index 09684955233..00000000000
--- a/app/helpers/git_helper.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-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
new file mode 100644
index 00000000000..54cafcd9e40
--- /dev/null
+++ b/app/helpers/gitlab/appearances_helper.rb
@@ -0,0 +1,23 @@
+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
new file mode 100644
index 00000000000..b019ffa5fe2
--- /dev/null
+++ b/app/helpers/gitlab/application_helper.rb
@@ -0,0 +1,317 @@
+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
new file mode 100644
index 00000000000..7132d3dcdad
--- /dev/null
+++ b/app/helpers/gitlab/application_settings_helper.rb
@@ -0,0 +1,61 @@
+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
new file mode 100644
index 00000000000..fbd52dbca3d
--- /dev/null
+++ b/app/helpers/gitlab/auth_helper.rb
@@ -0,0 +1,52 @@
+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
new file mode 100644
index 00000000000..8b53ba8b54f
--- /dev/null
+++ b/app/helpers/gitlab/blob_helper.rb
@@ -0,0 +1,76 @@
+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
new file mode 100644
index 00000000000..ecc56002e84
--- /dev/null
+++ b/app/helpers/gitlab/branches_helper.rb
@@ -0,0 +1,19 @@
+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
new file mode 100644
index 00000000000..93f0b0ec5ae
--- /dev/null
+++ b/app/helpers/gitlab/broadcast_messages_helper.rb
@@ -0,0 +1,18 @@
+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
new file mode 100644
index 00000000000..8a3de838b39
--- /dev/null
+++ b/app/helpers/gitlab/commits_helper.rb
@@ -0,0 +1,185 @@
+# 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
new file mode 100644
index 00000000000..407d25d3102
--- /dev/null
+++ b/app/helpers/gitlab/compare_helper.rb
@@ -0,0 +1,23 @@
+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
new file mode 100644
index 00000000000..2211c93999e
--- /dev/null
+++ b/app/helpers/gitlab/dashboard_helper.rb
@@ -0,0 +1,11 @@
+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
new file mode 100644
index 00000000000..02907eb80f3
--- /dev/null
+++ b/app/helpers/gitlab/diff_helper.rb
@@ -0,0 +1,172 @@
+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
new file mode 100644
index 00000000000..84f106dd536
--- /dev/null
+++ b/app/helpers/gitlab/emails_helper.rb
@@ -0,0 +1,59 @@
+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
new file mode 100644
index 00000000000..65522dae533
--- /dev/null
+++ b/app/helpers/gitlab/events_helper.rb
@@ -0,0 +1,205 @@
+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
new file mode 100644
index 00000000000..b8e0f482b94
--- /dev/null
+++ b/app/helpers/gitlab/explore_helper.rb
@@ -0,0 +1,19 @@
+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
new file mode 100644
index 00000000000..710cdc727d0
--- /dev/null
+++ b/app/helpers/gitlab/external_wiki_helper.rb
@@ -0,0 +1,13 @@
+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
new file mode 100644
index 00000000000..867b30b8c74
--- /dev/null
+++ b/app/helpers/gitlab/git_helper.rb
@@ -0,0 +1,7 @@
+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
new file mode 100644
index 00000000000..265cb4672fe
--- /dev/null
+++ b/app/helpers/gitlab/gitlab_markdown_helper.rb
@@ -0,0 +1,195 @@
+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
new file mode 100644
index 00000000000..7f1e455d5de
--- /dev/null
+++ b/app/helpers/gitlab/gitlab_routing_helper.rb
@@ -0,0 +1,69 @@
+# 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
new file mode 100644
index 00000000000..047f5c19095
--- /dev/null
+++ b/app/helpers/gitlab/graph_helper.rb
@@ -0,0 +1,18 @@
+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
new file mode 100644
index 00000000000..8172c617249
--- /dev/null
+++ b/app/helpers/gitlab/groups_helper.rb
@@ -0,0 +1,35 @@
+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
new file mode 100644
index 00000000000..e815d237bb1
--- /dev/null
+++ b/app/helpers/gitlab/icons_helper.rb
@@ -0,0 +1,87 @@
+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
new file mode 100644
index 00000000000..67238926555
--- /dev/null
+++ b/app/helpers/gitlab/issues_helper.rb
@@ -0,0 +1,90 @@
+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
new file mode 100644
index 00000000000..aa16d71f42c
--- /dev/null
+++ b/app/helpers/gitlab/labels_helper.rb
@@ -0,0 +1,103 @@
+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
new file mode 100644
index 00000000000..361f6b2fdac
--- /dev/null
+++ b/app/helpers/gitlab/merge_requests_helper.rb
@@ -0,0 +1,76 @@
+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
new file mode 100644
index 00000000000..116967d4946
--- /dev/null
+++ b/app/helpers/gitlab/milestones_helper.rb
@@ -0,0 +1,38 @@
+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
new file mode 100644
index 00000000000..b1caaac3f63
--- /dev/null
+++ b/app/helpers/gitlab/namespaces_helper.rb
@@ -0,0 +1,38 @@
+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
new file mode 100644
index 00000000000..14106d70840
--- /dev/null
+++ b/app/helpers/gitlab/nav_helper.rb
@@ -0,0 +1,23 @@
+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
new file mode 100644
index 00000000000..15076148b02
--- /dev/null
+++ b/app/helpers/gitlab/notes_helper.rb
@@ -0,0 +1,78 @@
+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
new file mode 100644
index 00000000000..b6324044ab1
--- /dev/null
+++ b/app/helpers/gitlab/notifications_helper.rb
@@ -0,0 +1,17 @@
+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
new file mode 100644
index 00000000000..d7a85186155
--- /dev/null
+++ b/app/helpers/gitlab/page_layout_helper.rb
@@ -0,0 +1,28 @@
+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
+  end
+end
diff --git a/app/helpers/gitlab/preferences_helper.rb b/app/helpers/gitlab/preferences_helper.rb
new file mode 100644
index 00000000000..3eac5d51acd
--- /dev/null
+++ b/app/helpers/gitlab/preferences_helper.rb
@@ -0,0 +1,67 @@
+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
new file mode 100644
index 00000000000..8a8cd6048df
--- /dev/null
+++ b/app/helpers/gitlab/projects_helper.rb
@@ -0,0 +1,332 @@
+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
new file mode 100644
index 00000000000..f9caf8f2431
--- /dev/null
+++ b/app/helpers/gitlab/search_helper.rb
@@ -0,0 +1,114 @@
+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
new file mode 100644
index 00000000000..d52d670a1cf
--- /dev/null
+++ b/app/helpers/gitlab/selects_helper.rb
@@ -0,0 +1,47 @@
+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
new file mode 100644
index 00000000000..aaf4d43f852
--- /dev/null
+++ b/app/helpers/gitlab/snippets_helper.rb
@@ -0,0 +1,22 @@
+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
new file mode 100644
index 00000000000..29c63a0d129
--- /dev/null
+++ b/app/helpers/gitlab/sorting_helper.rb
@@ -0,0 +1,98 @@
+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
new file mode 100644
index 00000000000..c0fbebcb1d9
--- /dev/null
+++ b/app/helpers/gitlab/submodule_helper.rb
@@ -0,0 +1,76 @@
+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
new file mode 100644
index 00000000000..01d36ff84fc
--- /dev/null
+++ b/app/helpers/gitlab/tab_helper.rb
@@ -0,0 +1,133 @@
+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
new file mode 100644
index 00000000000..d694b2c90ce
--- /dev/null
+++ b/app/helpers/gitlab/tags_helper.rb
@@ -0,0 +1,16 @@
+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
new file mode 100644
index 00000000000..dc48ff0e6e2
--- /dev/null
+++ b/app/helpers/gitlab/tree_helper.rb
@@ -0,0 +1,89 @@
+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
new file mode 100644
index 00000000000..46a12cc8c60
--- /dev/null
+++ b/app/helpers/gitlab/version_check_helper.rb
@@ -0,0 +1,9 @@
+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
new file mode 100644
index 00000000000..feba901f7d7
--- /dev/null
+++ b/app/helpers/gitlab/visibility_level_helper.rb
@@ -0,0 +1,97 @@
+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
new file mode 100644
index 00000000000..02a1daf0019
--- /dev/null
+++ b/app/helpers/gitlab/wiki_helper.rb
@@ -0,0 +1,26 @@
+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
deleted file mode 100644
index eb3f72a307d..00000000000
--- a/app/helpers/gitlab_markdown_helper.rb
+++ /dev/null
@@ -1,193 +0,0 @@
-require 'nokogiri'
-
-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
diff --git a/app/helpers/gitlab_routing_helper.rb b/app/helpers/gitlab_routing_helper.rb
deleted file mode 100644
index d0fae255a04..00000000000
--- a/app/helpers/gitlab_routing_helper.rb
+++ /dev/null
@@ -1,67 +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 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
deleted file mode 100644
index e1dda20de85..00000000000
--- a/app/helpers/graph_helper.rb
+++ /dev/null
@@ -1,16 +0,0 @@
-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
deleted file mode 100644
index b067cb54a43..00000000000
--- a/app/helpers/groups_helper.rb
+++ /dev/null
@@ -1,33 +0,0 @@
-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
diff --git a/app/helpers/icons_helper.rb b/app/helpers/icons_helper.rb
deleted file mode 100644
index 1cf5b96481a..00000000000
--- a/app/helpers/icons_helper.rb
+++ /dev/null
@@ -1,85 +0,0 @@
-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
deleted file mode 100644
index 6ddb37cd0dc..00000000000
--- a/app/helpers/issues_helper.rb
+++ /dev/null
@@ -1,88 +0,0 @@
-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
deleted file mode 100644
index 8036303851b..00000000000
--- a/app/helpers/labels_helper.rb
+++ /dev/null
@@ -1,101 +0,0 @@
-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
deleted file mode 100644
index f8169b4f288..00000000000
--- a/app/helpers/merge_requests_helper.rb
+++ /dev/null
@@ -1,74 +0,0 @@
-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
deleted file mode 100644
index 132a893e532..00000000000
--- a/app/helpers/milestones_helper.rb
+++ /dev/null
@@ -1,36 +0,0 @@
-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
deleted file mode 100644
index b3132a1f3ba..00000000000
--- a/app/helpers/namespaces_helper.rb
+++ /dev/null
@@ -1,36 +0,0 @@
-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
deleted file mode 100644
index 9b1dd8b8e54..00000000000
--- a/app/helpers/nav_helper.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-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
deleted file mode 100644
index 5f0c921413a..00000000000
--- a/app/helpers/notes_helper.rb
+++ /dev/null
@@ -1,76 +0,0 @@
-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
deleted file mode 100644
index 2f8e64c375f..00000000000
--- a/app/helpers/notifications_helper.rb
+++ /dev/null
@@ -1,15 +0,0 @@
-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/page_layout_helper.rb b/app/helpers/page_layout_helper.rb
deleted file mode 100644
index 01b6a63552c..00000000000
--- a/app/helpers/page_layout_helper.rb
+++ /dev/null
@@ -1,26 +0,0 @@
-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
-end
diff --git a/app/helpers/preferences_helper.rb b/app/helpers/preferences_helper.rb
deleted file mode 100644
index ea774e28ecf..00000000000
--- a/app/helpers/preferences_helper.rb
+++ /dev/null
@@ -1,65 +0,0 @@
-# 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
diff --git a/app/helpers/projects_helper.rb b/app/helpers/projects_helper.rb
deleted file mode 100644
index ab9b068de05..00000000000
--- a/app/helpers/projects_helper.rb
+++ /dev/null
@@ -1,330 +0,0 @@
-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
deleted file mode 100644
index c31a556ff7b..00000000000
--- a/app/helpers/search_helper.rb
+++ /dev/null
@@ -1,112 +0,0 @@
-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
deleted file mode 100644
index 12fce8db701..00000000000
--- a/app/helpers/selects_helper.rb
+++ /dev/null
@@ -1,45 +0,0 @@
-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
deleted file mode 100644
index 906cb12cd48..00000000000
--- a/app/helpers/snippets_helper.rb
+++ /dev/null
@@ -1,20 +0,0 @@
-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
deleted file mode 100644
index bb12d43f397..00000000000
--- a/app/helpers/sorting_helper.rb
+++ /dev/null
@@ -1,96 +0,0 @@
-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
deleted file mode 100644
index b3f50ceebe4..00000000000
--- a/app/helpers/submodule_helper.rb
+++ /dev/null
@@ -1,74 +0,0 @@
-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
deleted file mode 100644
index 0e7d8065ac7..00000000000
--- a/app/helpers/tab_helper.rb
+++ /dev/null
@@ -1,131 +0,0 @@
-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
deleted file mode 100644
index fb85544df2d..00000000000
--- a/app/helpers/tags_helper.rb
+++ /dev/null
@@ -1,14 +0,0 @@
-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
deleted file mode 100644
index 03a49e119b8..00000000000
--- a/app/helpers/tree_helper.rb
+++ /dev/null
@@ -1,88 +0,0 @@
-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
deleted file mode 100644
index f64d730b448..00000000000
--- a/app/helpers/version_check_helper.rb
+++ /dev/null
@@ -1,7 +0,0 @@
-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
deleted file mode 100644
index b52cd23aba2..00000000000
--- a/app/helpers/visibility_level_helper.rb
+++ /dev/null
@@ -1,95 +0,0 @@
-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/helpers/wiki_helper.rb b/app/helpers/wiki_helper.rb
deleted file mode 100644
index f8a96516e61..00000000000
--- a/app/helpers/wiki_helper.rb
+++ /dev/null
@@ -1,24 +0,0 @@
-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