Merge branch 'master' into fix/issue-move-rewrite-uploads

* master: (27 commits)
  Fix commit comment alignment
  minor cleanup in system_hook_spec
  Pre-calculate Emoji digests
  Clear .todo listener
  Change window.location to use turbolinks
  Make entire todo row clickable
  Add 8.6.2 CHANGELOG items
  Ensure uploads dir exists when running backup specs
  Move CarrierWave test env config to separate file
  Remove console logs
  Off the event initially
  Collapsed sidebar opens over instead of pushing content.
  Sidebar collapse update issue
  User selection from collapsed sidebar
  Add json response for user avatar in merge request
  Make changed values visible in minimized sidebar.
  Fixed MergeRequestController spec
  We need `sha` reference from `diff_base_commit` to generate the diff
  Use `diff_base_commit` instead of `target_branch` to generate diffs
  Isolate CarrierWave uploads in test enviroment
  ...

CHANGELOG

@@ -7,15 +7,34 @@ v 8.7.0 (unreleased)
   - Expose label description in API (Mariusz Jachimowicz)
   - Allow back dating on issues when created through the API
   - Fix avatar stretching by providing a cropping feature
+  - Fix raw/rendered diff producing different results on merge requests !3450
   - Add links to CI setup documentation from project settings and builds pages
   - Handle nil descriptions in Slack issue messages (Stan Hu)
   - Implement 'Groups View' as an option for dashboard preferences !3379 (Elias W.)
   - Implement 'TODOs View' as an option for dashboard preferences !3379 (Elias W.)
   - Gracefully handle notes on deleted commits in merge requests (Stan Hu)
 
-v 8.6.2 (unreleased)
-  - Comments on confidential issues don't show up in activity feed to non-members
-  - Fix NoMethodError when visiting CI root path at `/ci`
+v 8.6.2
+  - Fix dropdown alignment. !3298
+  - Fix issuable sidebar overlaps on tablet. !3299
+  - Make dropdowns pixel perfect. !3337
+  - Fix order of steps to prevent PostgreSQL errors when running migration. !3355
+  - Fix bold text in issuable sidebar. !3358
+  - Fix error with anonymous token in applications settings. !3362
+  - Fix the milestone 'upcoming' filter. !3364 + !3368
+  - Fix comments on confidential issues showing up in activity feed to non-members. !3375
+  - Fix `NoMethodError` when visiting CI root path at `/ci`. !3377
+  - Add a tooltip to new branch button in issue page. !3380
+  - Fix an issue hiding the password form when signed-in with a linked account. !3381
+  - Add links to CI setup documentation from project settings and builds pages. !3384
+  - Fix an issue with width of project select dropdown. !3386
+  - Remove redundant `require`s from Banzai files. !3391
+  - Fix error 500 with cancel button on issuable edit form. !3392 + !3417
+  - Fix background when editing a highlighted note. !3423
+  - Remove tabstop from the WIP toggle links. !3426
+  - Ensure private project snippets are not viewable by unauthorized people.
+  - Gracefully handle notes on deleted commits in merge requests (Stan Hu). !3402
+  - Fixed issue with notification settings not saving. !3452
 
 v 8.6.1
   - Add option to reload the schema before restoring a database backup. !2807
@@ -55,6 +74,7 @@ v 8.6.0
   - Fix wiki search results point to raw source (Hiroyuki Sato)
   - Don't load all of GitLab in mail_room
   - Add information about `image` and `services` field at `job` level in the `.gitlab-ci.yml` documentation (Pat Turner)
+  - Fall back to `In-Reply-To` and `References` headers when sub-addressing is not available (David Padilla)
   - HTTP error pages work independently from location and config (Artem Sidorenko)
   - Update `omniauth-saml` to 1.5.0 to allow for custom response attributes to be set
   - Memoize @group in Admin::GroupsController (Yatish Mehta)

Gemfile.lock

@@ -126,9 +126,9 @@ GEM
     coderay (1.1.0)
     coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
-    coffee-rails (4.1.0)
+    coffee-rails (4.1.1)
       coffee-script (>= 2.2.0)
-      railties (>= 4.0.0, < 5.0)
+      railties (>= 4.0.0, < 5.1.x)
     coffee-script (2.4.1)
       coffee-script-source
       execjs

app/assets/javascripts/gl_dropdown.js.coffee

@@ -195,6 +195,8 @@ class GitLabDropdown
     if @options.filterable
       @dropdown.find(".dropdown-input-field").focus()
 
+    @dropdown.trigger('shown.gl.dropdown')
+
   hidden: (e) =>
     if @options.filterable
       @dropdown
@@ -209,6 +211,8 @@ class GitLabDropdown
     if @options.hidden
       @options.hidden.call(@,e)
 
+    @dropdown.trigger('hidden.gl.dropdown')
+
 
   # Render the full menu
   renderMenu: (html) ->

app/assets/javascripts/issuable_context.js.coffee

@@ -9,7 +9,7 @@ class @IssuableContext
     $(".issuable-sidebar .inline-update").on "change", ".js-assignee", ->
       $(this).submit()
 
-    $(document).on "click",".edit-link", (e) ->
+    $(document).off("click", ".edit-link").on "click",".edit-link", (e) ->
       $block = $(@).parents('.block')
       $selectbox = $block.find('.selectbox')
       if $selectbox.is(':visible')

app/assets/javascripts/labels_select.js.coffee

@@ -16,6 +16,7 @@ class @LabelsSelect
       abilityName = $dropdown.data('ability-name')
       $selectbox = $dropdown.closest('.selectbox')
       $block = $selectbox.closest('.block')
+      $sidebarCollapsedValue = $block.find('.sidebar-collapsed-icon span')
       $value = $block.find('.value')
       $loading = $block.find('.block-loading').fadeOut()
 
@@ -142,6 +143,7 @@ class @LabelsSelect
         if not selected.length
           data[abilityName].label_ids = ['']
         $loading.fadeIn()
+        $dropdown.trigger('loading.gl.dropdown')
         $.ajax(
           type: 'PUT'
           url: issueUpdateURL
@@ -149,15 +151,20 @@ class @LabelsSelect
           data: data
         ).done (data) ->
           $loading.fadeOut()
+          $dropdown.trigger('loaded.gl.dropdown')
           $selectbox.hide()
           data.issueURLSplit = issueURLSplit
-          if not data.labels.length
-            template = labelNoneHTMLTemplate()
-          else
+          labelCount = 0
+          if data.labels.length
             template = labelHTMLTemplate(data)
-          href = $value
-                  .show()
+            labelCount = data.labels.length
+          else
+            template = labelNoneHTMLTemplate()
+          $value
+            .removeAttr('style')
             .html(template)
+          $sidebarCollapsedValue.text(labelCount)
+
           $value
             .find('a')
             .each((i) ->
@@ -226,7 +233,8 @@ class @LabelsSelect
 
         hidden: ->
           $selectbox.hide()
-          $value.show()
+          # display:block overrides the hide-collapse rule
+          $value.removeAttr('style')
           if $dropdown.hasClass 'js-multiselect'
             saveLabelData()
 

app/assets/javascripts/milestone_select.js.coffee

@@ -18,6 +18,7 @@ class @MilestoneSelect
       abilityName = $dropdown.data('ability-name')
       $selectbox = $dropdown.closest('.selectbox')
       $block = $selectbox.closest('.block')
+      $sidebarCollapsedValue = $block.find('.sidebar-collapsed-icon')
       $value = $block.find('.value')
       $loading = $block.find('.block-loading').fadeOut()
 
@@ -80,18 +81,14 @@ class @MilestoneSelect
           milestone.name is selectedMilestone
         hidden: ->
           $selectbox.hide()
-          $value.show()
-        clicked: (selected) ->
+
+          # display:block overrides the hide-collapse rule
+          $value.removeAttr('style')
+        clicked: (e) ->
           if $dropdown.hasClass 'js-filter-bulk-update'
             return
 
-          if $dropdown.hasClass('js-filter-submit')
-            if selected.name?
-              selectedMilestone = selected.name
-            else if selected.title?
-              selectedMilestone = selected.title
-            else
-              selectedMilestone = ''
+          if $dropdown.hasClass 'js-filter-submit'
             $dropdown.parents('form').submit()
           else
             selected = $selectbox
@@ -102,20 +99,22 @@ class @MilestoneSelect
             data[abilityName].milestone_id = selected
             $loading
               .fadeIn()
+            $dropdown.trigger('loading.gl.dropdown')
             $.ajax(
               type: 'PUT'
               url: issueUpdateURL
               data: data
             ).done (data) ->
+              $dropdown.trigger('loaded.gl.dropdown')
               $loading.fadeOut()
               $selectbox.hide()
-              $milestoneLink = $value
-                      .show()
-                      .find('a')
+              $value.removeAttr('style')
               if data.milestone?
                 data.milestone.namespace = _this.currentProject.namespace
                 data.milestone.path = _this.currentProject.path
                 $value.html(milestoneLinkTemplate(data.milestone))
+                $sidebarCollapsedValue.find('span').text(data.milestone.title)
               else
                 $value.html(milestoneLinkNoneTemplate)
+                $sidebarCollapsedValue.find('span').text('No')
       )
\ No newline at end of file

app/assets/javascripts/right_sidebar.js.coffee

+class @Sidebar
+  constructor: (currentUser) ->
+    @addEventListeners()
+
+  addEventListeners: ->
+    $('aside').on('click', '.sidebar-collapsed-icon', @sidebarCollapseClicked)
+    $('.dropdown').on('hidden.gl.dropdown', @sidebarDropdownHidden)
+    $('.dropdown').on('loading.gl.dropdown', @sidebarDropdownLoading)
+    $('.dropdown').on('loaded.gl.dropdown', @sidebarDropdownLoaded)
+
+  sidebarDropdownLoading: (e) ->
+    $sidebarCollapsedIcon = $(@).closest('.block').find('.sidebar-collapsed-icon')
+    img = $sidebarCollapsedIcon.find('img')
+    i = $sidebarCollapsedIcon.find('i')
+    $loading = $('<i class="fa fa-spinner fa-spin"></i>')
+    if img.length
+      img.before($loading)
+      img.hide()
+    else if i.length
+      i.before($loading)
+      i.hide()
+
+  sidebarDropdownLoaded: (e) ->
+    $sidebarCollapsedIcon = $(@).closest('.block').find('.sidebar-collapsed-icon')
+    img = $sidebarCollapsedIcon.find('img')
+    $sidebarCollapsedIcon.find('i.fa-spin').remove()
+    i = $sidebarCollapsedIcon.find('i')
+    if img.length
+      img.show()
+    else
+      i.show()
+
+
+  sidebarCollapseClicked: (e) ->
+    e.preventDefault()
+    $block = $(@).closest('.block')
+
+    $('aside')
+      .find('.gutter-toggle')
+      .trigger('click')
+    $editLink = $block.find('.edit-link')
+
+    if $editLink.length
+      $editLink.trigger('click')
+      $block.addClass('collapse-after-update')
+      $('.page-with-sidebar').addClass('with-overlay')
+
+  sidebarDropdownHidden: (e) ->
+    $block = $(@).closest('.block')
+    if $block.hasClass('collapse-after-update')
+      $block.removeClass('collapse-after-update')
+      $('.page-with-sidebar').removeClass('with-overlay')
+      $('aside')
+        .find('.gutter-toggle')
+        .trigger('click')
\ No newline at end of file

app/assets/javascripts/todos.js.coffee

@@ -6,10 +6,12 @@ class @Todos
   clearListeners: ->
     $('.done-todo').off('click')
     $('.js-todos-mark-all').off('click')
+    $('.todo').off('click')
 
   initBtnListeners: ->
     $('.done-todo').on('click', @doneClicked)
     $('.js-todos-mark-all').on('click', @allDoneClicked)
+    $('.todo').on('click', @goToTodoUrl)
 
   doneClicked: (e) =>
     e.preventDefault()
@@ -54,3 +56,6 @@ class @Todos
   updateBadges: (data) ->
     $('.todos-pending .badge, .todos-pending-count').text data.count
     $('.todos-done .badge').text data.done_count
+
+  goToTodoUrl: ->
+    Turbolinks.visit($(this).data('url'))

app/assets/javascripts/users_select.js.coffee

@@ -19,6 +19,7 @@ class @UsersSelect
       $block = $selectbox.closest('.block')
       abilityName = $dropdown.data('ability-name')
       $value = $block.find('.value')
+      $collapsedSidebar = $block.find('.sidebar-collapsed-user')
       $loading = $block.find('.block-loading').fadeOut()
 
       $block.on('click', '.js-assign-yourself', (e) =>
@@ -32,12 +33,14 @@ class @UsersSelect
         data[abilityName].assignee_id = selected
         $loading
           .fadeIn()
+        $dropdown.trigger('loading.gl.dropdown')
         $.ajax(
           type: 'PUT'
           dataType: 'json'
           url: issueURL
           data: data
         ).done (data) ->
+          $dropdown.trigger('loaded.gl.dropdown')
           $loading.fadeOut()
           $selectbox.hide()
 
@@ -51,11 +54,22 @@ class @UsersSelect
               name: 'Unassigned'
               username: ''
               avatar: ''
+          $value.html(assigneeTemplate(user))
+          $collapsedSidebar.html(collapsedAssigneeTemplate(user))
 
-          $value.html(noAssigneeTemplate(user))
-          $value.find('a').attr('href')
 
-      noAssigneeTemplate = _.template(
+      collapsedAssigneeTemplate = _.template(
+        '<% if( avatar ) { %>
+        <a class="author_link" href="/u/<%= username %>">
+          <img width="24" class="avatar avatar-inline s24" alt="" src="<%= avatar %>">
+          <span class="author">Toni Boehm</span>
+        </a>
+        <% } else { %>
+        <i class="fa fa-user"></i>
+        <% } %>'
+      )
+
+      assigneeTemplate = _.template(
         '<% if (username) { %>
         <a class="author_link " href="/u/<%= username %>">
           <% if( avatar ) { %>
@@ -131,7 +145,8 @@ class @UsersSelect
 
         hidden: (e) ->
           $selectbox.hide()
-          $value.show()
+          # display:block overrides the hide-collapse rule
+          $value.removeAttr('style')
 
         clicked: (user) ->
           page = $('body').data 'page'

app/assets/stylesheets/framework/sidebar.scss

@@ -288,6 +288,10 @@
   @media (min-width: $screen-sm-min) {
     padding-right: $sidebar_collapsed_width;
   }
+
+  .sidebar-collapsed-icon {
+    cursor: pointer;
+  }
 }
 
 .right-sidebar-expanded {
@@ -300,4 +304,8 @@
   @media (min-width: $screen-md-min) {
     padding-right: $gutter_width;
   }
+
+  &.with-overlay {
+    padding-right: $sidebar_collapsed_width;
+  }
 }

app/assets/stylesheets/pages/todos.scss

@@ -13,6 +13,12 @@
   }
 }
 
+.todo {
+  &:hover {
+    cursor: pointer;
+  }
+}
+
 .todo-item {
   .todo-title {
     @include str-truncated(calc(100% - 174px));

app/controllers/projects/badges_controller.rb

@@ -2,11 +2,12 @@ class Projects::BadgesController < Projects::ApplicationController
   before_action :no_cache_headers
 
   def build
+    badge = Gitlab::Badge::Build.new(project, params[:ref])
+
     respond_to do |format|
       format.html { render_404 }
       format.svg do
-        image = Ci::ImageForBuildService.new.execute(project, ref: params[:ref])
-        send_file(image.path, filename: image.name, disposition: 'inline', type: 'image/svg+xml')
+        send_data(badge.data, type: badge.type, disposition: 'inline')
       end
     end
   end

app/controllers/projects/merge_requests_controller.rb

@@ -57,8 +57,8 @@ class Projects::MergeRequestsController < Projects::ApplicationController
     respond_to do |format|
       format.html
       format.json { render json: @merge_request }
-      format.diff { render text: @merge_request.to_diff(current_user) }
-      format.patch { render text: @merge_request.to_patch(current_user) }
+      format.diff { render text: @merge_request.to_diff }
+      format.patch { render text: @merge_request.to_patch }
     end
   end
 
@@ -154,7 +154,7 @@ class Projects::MergeRequestsController < Projects::ApplicationController
                        @merge_request.target_project, @merge_request])
         end
         format.json do
-          render json: @merge_request.to_json(include: [:milestone, :labels, :assignee])
+          render json: @merge_request.to_json(include: [:milestone, :labels, assignee: { methods: :avatar_url }])
         end
       end
     else

app/controllers/projects_controller.rb

@@ -138,7 +138,7 @@ class ProjectsController < Projects::ApplicationController
     participants = ::Projects::ParticipantsService.new(@project, current_user).execute(note_type, note_id)
 
     @suggestions = {
-      emojis: autocomplete_emojis,
+      emojis: AwardEmoji.urls,
       issues: autocomplete.issues,
       mergerequests: autocomplete.merge_requests,
       members: participants
@@ -235,17 +235,6 @@ class ProjectsController < Projects::ApplicationController
     )
   end
 
-  def autocomplete_emojis
-    Rails.cache.fetch("autocomplete-emoji-#{Gemojione::VERSION}") do
-      Emoji.emojis.map do |name, emoji|
-        {
-          name: name,
-          path: view_context.image_url("#{emoji["unicode"]}.png")
-        }
-      end
-    end
-  end
-
   def repo_exists?
     project.repository_exists? && !project.empty_repo?
   end

app/mailers/notify.rb

@@ -110,6 +110,10 @@ class Notify < BaseMailer
 
       headers['Reply-To'] = address
 
+      fallback_reply_message_id = "<reply-#{reply_key}@#{Gitlab.config.gitlab.host}>".freeze
+      headers['References'] ||= ''
+      headers['References'] << ' ' << fallback_reply_message_id
+
       @reply_by_email = true
     end
 

app/models/merge_request.rb

@@ -331,15 +331,15 @@ class MergeRequest < ActiveRecord::Base
   # Returns the raw diff for this merge request
   #
   # see "git diff"
-  def to_diff(current_user)
-    target_project.repository.diff_text(target_branch, source_sha)
+  def to_diff
+    target_project.repository.diff_text(diff_base_commit.sha, source_sha)
   end
 
   # Returns the commit as a series of email patches.
   #
   # see "git format-patch"
-  def to_patch(current_user)
-    target_project.repository.format_patch(target_branch, source_sha)
+  def to_patch
+    target_project.repository.format_patch(diff_base_commit.sha, source_sha)
   end
 
   def hook_attrs

app/models/repository.rb

@@ -335,6 +335,8 @@ class Repository
 
   # Runs code just before a repository is deleted.
   def before_delete
+    expire_exists_cache
+
     expire_cache if exists?
 
     expire_root_ref_cache

app/views/dashboard/todos/_todo.html.haml

-%li{class: "todo todo-#{todo.done? ? 'done' : 'pending'}", id: dom_id(todo) }
+%li{class: "todo todo-#{todo.done? ? 'done' : 'pending'}", id: dom_id(todo), data:{url: todo_target_path(todo)} }
   .todo-item.todo-block
     = image_tag avatar_icon(todo.author_email, 40), class: 'avatar s40', alt:''
 

app/views/projects/notes/discussions/_commit.html.haml

@@ -9,7 +9,7 @@
         Show/hide discussion
     %div
       = link_to_member(@project, note.author, avatar: false)
-      %p started a discussion on #{commit_description}
+      started a discussion on #{commit_description}
       - if commit
         = link_to(commit.short_id, namespace_project_commit_path(note.project.namespace, note.project, note.noteable), class: 'monospace')
     .last-update.hide.js-toggle-content

app/views/shared/issuable/_sidebar.html.haml

@@ -150,3 +150,4 @@
       new LabelsSelect();
       new IssuableContext('#{current_user.to_json(only: [:username, :id, :name])}');
       new Subscription('.subscription')
+      new Sidebar();
\ No newline at end of file

app/workers/project_cache_worker.rb

@@ -5,6 +5,9 @@ class ProjectCacheWorker
 
   def perform(project_id)
     project = Project.find(project_id)
+
+    return unless project.repository.exists?
+
     project.update_repository_size
     project.update_commit_count
 

config/gitlab.yml.example

@@ -106,7 +106,7 @@ production: &base
     enabled: false
 
     # The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
-    # The `%{key}` placeholder is added after the user part, after a `+` character, before the `@`.
+    # The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
     address: "gitlab-incoming+%{key}@gmail.com"
 
     # Email account username

config/mail_room.yml

@@ -17,7 +17,7 @@ if File.exists?(config_file)
   config['start_tls']  = false    if config['start_tls'].nil?
   config['mailbox']    = "inbox"  if config['mailbox'].nil?
 
-  if config['enabled'] && config['address'] && config['address'].include?('%{key}')
+  if config['enabled'] && config['address']
     redis_url = Gitlab::RedisConfig.new(rails_env).url
     %>
     -

doc/incoming_email/README.md

 # Reply by email
 
-GitLab can be set up to allow users to comment on issues and merge requests by replying to notification emails.
+GitLab can be set up to allow users to comment on issues and merge requests by
+replying to notification emails.
 
-## Get a mailbox
+## Requirement
 
-Reply by email requires an IMAP-enabled email account, with a provider or server that supports [email sub-addressing](https://en.wikipedia.org/wiki/Email_address#Sub-addressing). Sub-addressing is a feature where any email to `user+some_arbitrary_tag@example.com` will end up in the mailbox for `user@example.com`, and is supported by providers such as Gmail, Google Apps, Yahoo! Mail, Outlook.com and iCloud, as well as the Postfix mail server which you can run on-premises.
+Reply by email requires an IMAP-enabled email account. GitLab allows you to use
+three strategies for this feature:
+- using email sub-addressing
+- using a dedicated email address
+- using a catch-all mailbox
 
-If you want to use Gmail / Google Apps with Reply by email, make sure you have [IMAP access enabled](https://support.google.com/mail/troubleshooter/1668960?hl=en#ts=1665018) and [allow less secure apps to access the account](https://support.google.com/accounts/answer/6010255).
+### Email sub-addressing
 
-To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these instructions](./postfix.md).
+**If your provider or server supports email sub-addressing, we recommend using it.**
+
+[Sub-addressing](https://en.wikipedia.org/wiki/Email_address#Sub-addressing) is
+a feature where any email to `user+some_arbitrary_tag@example.com` will end up
+in the mailbox for `user@example.com`, and is supported by providers such as
+Gmail, Google Apps, Yahoo! Mail, Outlook.com and iCloud, as well as the Postfix
+mail server which you can run on-premises.
+
+### Dedicated email address
+
+This solution is really simple to set up: you just have to create an email
+address dedicated to receive your users' replies to GitLab notifications.
+
+### Catch-all mailbox
+
+A [catch-all mailbox](https://en.wikipedia.org/wiki/Catch-all) for a domain will
+"catch all" the emails addressed to the domain that do not exist in the mail
+server.
+
+## How it works?
+
+### 1. GitLab sends a notification email
+
+When GitLab sends a notification and Reply by email is enabled, the `Reply-To`
+header is set to the address defined in your GitLab configuration, with the
+`%{key}` placeholder (if present) replaced by a specific "reply key". In
+addition, this "reply key" is also added to the `References` header.
+
+### 2. You reply to the notification email
+
+When you reply to the notification email, your email client will:
+
+- send the email to the `Reply-To` address it got from the notification email
+- set the `In-Reply-To` header to the value of the `Message-ID` header from the
+  notification email
+- set the `References` header to the value of the `Message-ID` plus the value of
+  the notification email's `References` header.
+
+### 3. GitLab receives your reply to the notification email
+
+When GitLab receives your reply, it will look for the "reply key" in the
+following headers, in this order:
+
+1. the `To` header
+1. the `References` header
+
+If it finds a reply key, it will be able to leave your reply as a comment on
+the entity the notification was about (issue, merge request, commit...).
+
+For more details about the `Message-ID`, `In-Reply-To`, and `References headers`,
+please consult [RFC 5322](https://tools.ietf.org/html/rfc5322#section-3.6.4).
 
 ## Set it up
 
+If you want to use Gmail / Google Apps with Reply by email, make sure you have
+[IMAP access enabled](https://support.google.com/mail/troubleshooter/1668960?hl=en#ts=1665018)
+and [allowed less secure apps to access the account](https://support.google.com/accounts/answer/6010255).
+
+To set up a basic Postfix mail server with IMAP access on Ubuntu, follow
+[these instructions](./postfix.md).
+
 ### Omnibus package installations
 
-1. Find the `incoming_email` section in `/etc/gitlab/gitlab.rb`, enable the feature and fill in the details for your specific IMAP server and email account:
+1. Find the `incoming_email` section in `/etc/gitlab/gitlab.rb`, enable the
+  feature and fill in the details for your specific IMAP server and email account:
 
     ```ruby
     # Configuration for Postfix mail server, assumes mailbox incoming@gitlab.example.com
     gitlab_rails['incoming_email_enabled'] = true
 
-    # The email address including a placeholder for the key that references the item being replied to.
-    # The `%{key}` placeholder is added after the user part, before the `@`.
+    # The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
+    # The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
     gitlab_rails['incoming_email_address'] = "incoming+%{key}@gitlab.example.com"
 
     # Email account username
@@ -49,7 +112,7 @@ To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these
     gitlab_rails['incoming_email_enabled'] = true
 
     # The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
-    # The `%{key}` placeholder is added after the user part, after a `+` character, before the `@`.
+    # The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
     gitlab_rails['incoming_email_address'] = "gitlab-incoming+%{key}@gmail.com"
 
     # Email account username
@@ -72,8 +135,6 @@ To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these
     gitlab_rails['incoming_email_mailbox_name'] = "inbox"
     ```
 
-    As mentioned, the part after `+` in the address is ignored, and any email sent here will end up in the mailbox for `incoming@gitlab.example.com`/`gitlab-incoming@gmail.com`.
-
 1. Reconfigure GitLab and restart mailroom for the changes to take effect:
 
     ```sh
@@ -97,7 +158,8 @@ To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these
     cd /home/git/gitlab
     ```
 
-1. Find the `incoming_email` section in `config/gitlab.yml`, enable the feature and fill in the details for your specific IMAP server and email account:
+1. Find the `incoming_email` section in `config/gitlab.yml`, enable the feature
+  and fill in the details for your specific IMAP server and email account:
 
     ```sh
     sudo editor config/gitlab.yml
@@ -109,7 +171,7 @@ To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these
       enabled: true
 
       # The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
-      # The `%{key}` placeholder is added after the user part, after a `+` character, before the `@`.
+      # The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
       address: "incoming+%{key}@gitlab.example.com"
 
       # Email account username
@@ -138,7 +200,7 @@ To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these
       enabled: true
 
       # The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
-      # The `%{key}` placeholder is added after the user part, after a `+` character, before the `@`.
+      # The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
       address: "gitlab-incoming+%{key}@gmail.com"
 
       # Email account username
@@ -161,8 +223,6 @@ To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these
       mailbox: "inbox"
     ```
 
-    As mentioned, the part after `+` in the address is ignored, and any email sent here will end up in the mailbox for `incoming@gitlab.example.com`/`gitlab-incoming@gmail.com`.
-
 1. Enable `mail_room` in the init script at `/etc/default/gitlab`:
 
     ```sh
@@ -195,8 +255,8 @@ To set up a basic Postfix mail server with IMAP access on Ubuntu, follow [these
     incoming_email:
       enabled: true
 
-      # The email address including a placeholder for the key that references the item being replied to.
-      # The `%{key}` placeholder is added after the user part, before the `@`.
+      # The email address including the `%{key}` placeholder that will be replaced to reference the item being replied to.
+      # The placeholder can be omitted but if present, it must appear in the "user" part of the address (before the `@`).
       address: "gitlab-incoming+%{key}@gmail.com"
 
       # Email account username

features/dashboard/todos.feature

@@ -36,3 +36,8 @@ Feature: Dashboard Todos
     Scenario: I filter by action
       Given I filter by "Mentioned"
       Then I should not see todos related to "Assignments" in the list
+
+  @javascript
+    Scenario: I click on a todo row
+      Given I click on the todo
+      Then I should be directed to the corresponding page

features/steps/dashboard/todos.rb

@@ -88,6 +88,14 @@ class Spinach::Features::DashboardTodos < Spinach::FeatureSteps
     should_not_see_todo "John Doe assigned you issue ##{issue.iid}"
   end
 
+  step 'I click on the todo' do
+    find('.todo:nth-child(1)').click
+  end
+
+  step 'I should be directed to the corresponding page' do
+    page.should have_css('.identifier', text: 'Merge Request !1')
+  end
+
   def should_see_todo(position, title, body, pending = true)
     page.within(".todo:nth-child(#{position})") do
       expect(page).to have_content title

lib/award_emoji.rb

@@ -48,4 +48,23 @@ class AwardEmoji
       JSON.parse(File.read(json_path))
     end
   end
+
+  # Returns an Array of Emoji names and their asset URLs.
+  def self.urls
+    @urls ||= begin
+      path = File.join(Rails.root, 'fixtures', 'emojis', 'digests.json')
+      prefix = Gitlab::Application.config.assets.prefix
+      digest = Gitlab::Application.config.assets.digest
+
+      JSON.parse(File.read(path)).map do |hash|
+        if digest
+          fname = "#{hash['unicode']}-#{hash['digest']}"
+        else
+          fname = hash['unicode']
+        end
+
+        { name: hash['name'], path: "#{prefix}/#{fname}.png" }
+      end
+    end
+  end
 end

lib/gitlab/badge/build.rb

+module Gitlab
+  module Badge
+    ##
+    # Build badge
+    #
+    class Build
+      def initialize(project, ref)
+        @image = ::Ci::ImageForBuildService.new.execute(project, ref: ref)
+      end
+
+      def to_s
+        @image[:name].sub(/\.svg$/, '')
+      end
+
+      def type
+        'image/svg+xml'
+      end
+
+      def data
+        File.read(@image[:path])
+      end
+    end
+  end
+end

lib/gitlab/email/receiver.rb

@@ -63,6 +63,10 @@ module Gitlab
       end
 
       def reply_key
+        key_from_to_header || key_from_additional_headers
+      end
+
+      def key_from_to_header
         key = nil
         message.to.each do |address|
           key = Gitlab::IncomingEmail.key_from_address(address)
@@ -72,6 +76,17 @@ module Gitlab
         key
       end
 
+      def key_from_additional_headers
+        reply_key = nil
+
+        Array(message.references).each do |message_id|
+          reply_key = Gitlab::IncomingEmail.key_from_fallback_reply_message_id(message_id)
+          break if reply_key
+        end
+
+        reply_key
+      end
+
       def sent_notification
         return nil unless reply_key
 

lib/gitlab/incoming_email.rb

 module Gitlab
   module IncomingEmail
     class << self
-      def enabled?
-        config.enabled && address_formatted_correctly?
-      end
+      FALLBACK_REPLY_MESSAGE_ID_REGEX = /\Areply\-(.+)@#{Gitlab.config.gitlab.host}\Z/.freeze
 
-      def address_formatted_correctly?
-        config.address &&
-          config.address.include?("%{key}")
+      def enabled?
+        config.enabled && config.address
       end
 
       def reply_address(key)
@@ -24,6 +21,13 @@ module Gitlab
         match[1]
       end
 
+      def key_from_fallback_reply_message_id(message_id)
+        match = message_id.match(FALLBACK_REPLY_MESSAGE_ID_REGEX)
+        return unless match
+
+        match[1]
+      end
+
       def config
         Gitlab.config.incoming_email
       end

lib/tasks/gemojione.rake

-# This task will generate a standard and Retina sprite of all of the current
-# Gemojione Emojis, with the accompanying SCSS map.
-#
-# It will not appear in `rake -T` output, and the dependent gems are not
-# included in the Gemfile by default, because this task will only be needed
-# occasionally, such as when new Emojis are added to Gemojione.
-
-begin
+namespace :gemojione do
+  desc 'Generates Emoji SHA256 digests'
+  task digests: :environment do
+    require 'digest/sha2'
+    require 'json'
+
+    dir = Gemojione.index.images_path
+
+    digests = AwardEmoji.emojis.map do |name, emoji_hash|
+      fpath = File.join(dir, "#{emoji_hash['unicode']}.png")
+      digest = Digest::SHA256.file(fpath).hexdigest
+
+      { name: name, unicode: emoji_hash['unicode'], digest: digest }
+    end
+
+    out = File.join(Rails.root, 'fixtures', 'emojis', 'digests.json')
+
+    File.open(out, 'w') do |handle|
+      handle.write(JSON.pretty_generate(digests))
+    end
+  end
+
+  # This task will generate a standard and Retina sprite of all of the current
+  # Gemojione Emojis, with the accompanying SCSS map.
+  #
+  # It will not appear in `rake -T` output, and the dependent gems are not
+  # included in the Gemfile by default, because this task will only be needed
+  # occasionally, such as when new Emojis are added to Gemojione.
+  task sprite: :environment do
+    begin
       require 'sprite_factory'
       require 'rmagick'
-rescue LoadError
+    rescue LoadError
       # noop
-end
+    end
 
-namespace :gemojione do
-  task sprite: :environment do
     check_requirements!
 
     SIZE   = 20

lib/tasks/gitlab/check.rake

@@ -623,7 +623,6 @@ namespace :gitlab do
       start_checking "Reply by email"
 
       if Gitlab.config.incoming_email.enabled
-        check_address_formatted_correctly
         check_imap_authentication
 
         if Rails.env.production?
@@ -643,20 +642,6 @@ namespace :gitlab do
     # Checks
     ########################
 
-    def check_address_formatted_correctly
-      print "Address formatted correctly? ... "
-
-      if Gitlab::IncomingEmail.address_formatted_correctly?
-        puts "yes".green
-      else
-        puts "no".red
-        try_fixing_it(
-          "Make sure that the address in config/gitlab.yml includes the '%{key}' placeholder."
-        )
-        fix_and_rerun
-      end
-    end
-
     def check_initd_configured_correctly
       print "Init.d configured correctly? ... "
 

spec/controllers/projects/merge_requests_controller_spec.rb

@@ -63,7 +63,7 @@ describe Projects::MergeRequestsController do
             id: merge_request.iid,
             format: format)
 
-        expect(response.body).to eq((merge_request.send(:"to_#{format}",user)).to_s)
+        expect(response.body).to eq((merge_request.send(:"to_#{format}")).to_s)
       end
 
       it "should not escape Html" do

spec/fixtures/emails/reply_without_subaddressing_and_key_inside_references.eml

+Return-Path: <jake@adventuretime.ooo>
+Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
+Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <reply+59d8df8370b7e95c5a49fbf86aeb2c93@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <reply@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
+Date: Thu, 13 Jun 2013 17:03:48 -0400
+From: Jake the Dog <jake@adventuretime.ooo>
+To: reply@appmail.adventuretime.ooo
+Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
+In-Reply-To: <issue_1@localhost>
+References: <issue_1@localhost> <reply-59d8df8370b7e95c5a49fbf86aeb2c93@localhost>
+Subject: re: [Discourse Meta] eviltrout posted in 'Adventure Time Sux'
+Mime-Version: 1.0
+Content-Type: text/plain;
+ charset=ISO-8859-1
+Content-Transfer-Encoding: 7bit
+X-Sieve: CMU Sieve 2.2
+X-Received: by 10.0.0.1 with SMTP id n7mr11234144ipb.85.1371157428600; Thu,
+ 13 Jun 2013 14:03:48 -0700 (PDT)
+X-Scanned-By: MIMEDefang 2.69 on IPv6:2001:470:1d:165::1
+
+I could not disagree more. I am obviously biased but adventure time is the
+greatest show ever created. Everyone should watch it.
+
+- Jake out
+
+
+On Sun, Jun 9, 2013 at 1:39 PM, eviltrout via Discourse Meta
+<reply+59d8df8370b7e95c5a49fbf86aeb2c93@appmail.adventuretime.ooo> wrote:
+>
+>
+>
+> eviltrout posted in 'Adventure Time Sux' on Discourse Meta:
+>
+> ---
+> hey guys everyone knows adventure time sucks!
+>
+> ---
+> Please visit this link to respond: http://localhost:3000/t/adventure-time-sux/1234/3
+>
+> To unsubscribe from these emails, visit your [user preferences](http://localhost:3000/user_preferences).
+>

spec/fixtures/emails/valid_reply.eml

@@ -7,6 +7,8 @@ Date: Thu, 13 Jun 2013 17:03:48 -0400
 From: Jake the Dog <jake@adventuretime.ooo>
 To: reply+59d8df8370b7e95c5a49fbf86aeb2c93@appmail.adventuretime.ooo
 Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
+In-Reply-To: <issue_1@localhost>
+References: <issue_1@localhost> <reply-59d8df8370b7e95c5a49fbf86aeb2c93@localhost>
 Subject: re: [Discourse Meta] eviltrout posted in 'Adventure Time Sux'
 Mime-Version: 1.0
 Content-Type: text/plain;

spec/lib/award_emoji_spec.rb

+require 'spec_helper'
+
+describe AwardEmoji do
+  describe '.urls' do
+    subject { AwardEmoji.urls }
+
+    it { is_expected.to be_an_instance_of(Array) }
+    it { is_expected.to_not be_empty }
+
+    context 'every Hash in the Array' do
+      it 'has the correct keys and values' do
+        subject.each do |hash|
+          expect(hash[:name]).to be_an_instance_of(String)
+          expect(hash[:path]).to be_an_instance_of(String)
+        end
+      end
+    end
+  end
+end

spec/lib/gitlab/badge/build_spec.rb

+require 'spec_helper'
+
+describe Gitlab::Badge::Build do
+  let(:project) { create(:project) }
+  let(:sha) { project.commit.sha }
+  let(:badge) { described_class.new(project, 'master') }
+
+  describe '#type' do
+    subject { badge.type }
+    it { is_expected.to eq 'image/svg+xml' }
+  end
+
+  context 'build exists' do
+    let(:ci_commit) { create(:ci_commit, project: project, sha: sha) }
+    let!(:build) { create(:ci_build, commit: ci_commit) }
+
+
+    context 'build success' do
+      before { build.success! }
+
+      describe '#to_s' do
+        subject { badge.to_s }
+        it { is_expected.to eq 'build-success' }
+      end
+
+      describe '#data' do
+        let(:data) { badge.data }
+
+        it 'contains infromation about success' do
+          expect(status_node(data, 'success')).to be_truthy
+        end
+      end
+    end
+
+    context 'build failed' do
+      before { build.drop! }
+
+      describe '#to_s' do
+        subject { badge.to_s }
+        it { is_expected.to eq 'build-failed' }
+      end
+
+      describe '#data' do
+        let(:data) { badge.data }
+
+        it 'contains infromation about failure' do
+          expect(status_node(data, 'failed')).to be_truthy
+        end
+      end
+    end
+  end
+
+  context 'build does not exist' do
+    describe '#to_s' do
+      subject { badge.to_s }
+      it { is_expected.to eq 'build-unknown' }
+    end
+
+    describe '#data' do
+      let(:data) { badge.data }
+
+      it 'contains infromation about unknown build' do
+        expect(status_node(data, 'unknown')).to be_truthy
+      end
+    end
+  end
+
+  def status_node(data, status)
+    xml = Nokogiri::XML.parse(data)
+    xml.at(%Q{text:contains("#{status}")})
+  end
+end

spec/lib/gitlab/email/receiver_spec.rb

@@ -3,6 +3,7 @@ require "spec_helper"
 describe Gitlab::Email::Receiver, lib: true do
   before do
     stub_incoming_email_setting(enabled: true, address: "reply+%{key}@appmail.adventuretime.ooo")
+    stub_config_setting(host: 'localhost')
   end
 
   let(:reply_key) { "59d8df8370b7e95c5a49fbf86aeb2c93" }
@@ -137,5 +138,27 @@ describe Gitlab::Email::Receiver, lib: true do
 
       expect(note.note).to include(markdown)
     end
+
+    context 'when sub-addressing is not supported' do
+      before do
+        stub_incoming_email_setting(enabled: true, address: nil)
+      end
+
+      shared_examples 'an email that contains a reply key' do |header|
+        it "fetches the reply key from the #{header} header and creates a comment" do
+          expect { receiver.execute }.to change { noteable.notes.count }.by(1)
+          note = noteable.notes.last
+
+          expect(note.author).to eq(sent_notification.recipient)
+          expect(note.note).to include('I could not disagree more.')
+        end
+      end
+
+      context 'reply key is in the References header' do
+        let(:email_raw) { fixture_file('emails/reply_without_subaddressing_and_key_inside_references.eml') }
+
+        it_behaves_like 'an email that contains a reply key', 'References'
+      end
+    end
   end
 end

spec/lib/gitlab/incoming_email_spec.rb

@@ -7,27 +7,11 @@ describe Gitlab::IncomingEmail, lib: true do
         stub_incoming_email_setting(enabled: true)
       end
 
-      context "when the address is valid" do
-        before do
-          stub_incoming_email_setting(address: "replies+%{key}@example.com")
-        end
-
-        it "returns true" do
+      it 'returns true' do
         expect(described_class.enabled?).to be_truthy
       end
     end
 
-      context "when the address is invalid" do
-        before do
-          stub_incoming_email_setting(address: "replies@example.com")
-        end
-
-        it "returns false" do
-          expect(described_class.enabled?).to be_falsey
-        end
-      end
-    end
-
     context "when reply by email is disabled" do
       before do
         stub_incoming_email_setting(enabled: false)
@@ -58,4 +42,10 @@ describe Gitlab::IncomingEmail, lib: true do
       expect(described_class.key_from_address("replies+key@example.com")).to eq("key")
     end
   end
+
+  context 'self.key_from_fallback_reply_message_id' do
+    it 'returns reply key' do
+      expect(described_class.key_from_fallback_reply_message_id('reply-key@localhost')).to eq('key')
+    end
+  end
 end

spec/mailers/notify_spec.rb

@@ -35,7 +35,9 @@ describe Notify do
           subject { Notify.new_issue_email(issue.assignee_id, issue.id) }
 
           it_behaves_like 'an assignee email'
-          it_behaves_like 'an email starting a new thread', 'issue'
+          it_behaves_like 'an email starting a new thread with reply-by-email enabled' do
+            let(:model) { issue }
+          end
           it_behaves_like 'it should show Gmail Actions View Issue link'
           it_behaves_like 'an unsubscribeable thread'
 
@@ -73,9 +75,11 @@ describe Notify do
           subject { Notify.reassigned_issue_email(recipient.id, issue.id, previous_assignee.id, current_user.id) }
 
           it_behaves_like 'a multiple recipients email'
-          it_behaves_like 'an answer to an existing thread', 'issue'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { issue }
+          end
           it_behaves_like 'it should show Gmail Actions View Issue link'
-          it_behaves_like "an unsubscribeable thread"
+          it_behaves_like 'an unsubscribeable thread'
 
           it 'is sent as the author' do
             sender = subject.header[:from].addrs[0]
@@ -104,7 +108,9 @@ describe Notify do
           subject { Notify.relabeled_issue_email(recipient.id, issue.id, %w[foo bar baz], current_user.id) }
 
           it_behaves_like 'a multiple recipients email'
-          it_behaves_like 'an answer to an existing thread', 'issue'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { issue }
+          end
           it_behaves_like 'it should show Gmail Actions View Issue link'
           it_behaves_like 'a user cannot unsubscribe through footer link'
           it_behaves_like 'an email with a labels subscriptions link in its footer'
@@ -132,7 +138,9 @@ describe Notify do
           let(:status) { 'closed' }
           subject { Notify.issue_status_changed_email(recipient.id, issue.id, status, current_user.id) }
 
-          it_behaves_like 'an answer to an existing thread', 'issue'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { issue }
+          end
           it_behaves_like 'it should show Gmail Actions View Issue link'
           it_behaves_like 'an unsubscribeable thread'
 
@@ -163,7 +171,9 @@ describe Notify do
           let(:new_issue) { create(:issue) }
           subject { Notify.issue_moved_email(recipient, issue, new_issue, current_user) }
 
-          it_behaves_like 'an answer to an existing thread', 'issue'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { issue }
+          end
           it_behaves_like 'it should show Gmail Actions View Issue link'
           it_behaves_like 'an unsubscribeable thread'
 
@@ -196,9 +206,11 @@ describe Notify do
           subject { Notify.new_merge_request_email(merge_request.assignee_id, merge_request.id) }
 
           it_behaves_like 'an assignee email'
-          it_behaves_like 'an email starting a new thread', 'merge_request'
+          it_behaves_like 'an email starting a new thread with reply-by-email enabled' do
+            let(:model) { merge_request }
+          end
           it_behaves_like 'it should show Gmail Actions View Merge request link'
-          it_behaves_like "an unsubscribeable thread"
+          it_behaves_like 'an unsubscribeable thread'
 
           it 'has the correct subject' do
             is_expected.to have_subject /#{merge_request.title} \(##{merge_request.iid}\)/
@@ -216,10 +228,6 @@ describe Notify do
             is_expected.to have_body_text /#{merge_request.target_branch}/
           end
 
-          it 'has the correct message-id set' do
-            is_expected.to have_header 'Message-ID', "<merge_request_#{merge_request.id}@#{Gitlab.config.gitlab.host}>"
-          end
-
           context 'when enabled email_author_in_body' do
             before do
               allow(current_application_settings).to receive(:email_author_in_body).and_return(true)
@@ -247,7 +255,9 @@ describe Notify do
           subject { Notify.reassigned_merge_request_email(recipient.id, merge_request.id, previous_assignee.id, current_user.id) }
 
           it_behaves_like 'a multiple recipients email'
-          it_behaves_like 'an answer to an existing thread', 'merge_request'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { merge_request }
+          end
           it_behaves_like 'it should show Gmail Actions View Merge request link'
           it_behaves_like "an unsubscribeable thread"
 
@@ -278,7 +288,9 @@ describe Notify do
           subject { Notify.relabeled_merge_request_email(recipient.id, merge_request.id, %w[foo bar baz], current_user.id) }
 
           it_behaves_like 'a multiple recipients email'
-          it_behaves_like 'an answer to an existing thread', 'merge_request'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { merge_request }
+          end
           it_behaves_like 'it should show Gmail Actions View Merge request link'
           it_behaves_like 'a user cannot unsubscribe through footer link'
           it_behaves_like 'an email with a labels subscriptions link in its footer'
@@ -306,9 +318,11 @@ describe Notify do
           let(:status) { 'reopened' }
           subject { Notify.merge_request_status_email(recipient.id, merge_request.id, status, current_user.id) }
 
-          it_behaves_like 'an answer to an existing thread', 'merge_request'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { merge_request }
+          end
           it_behaves_like 'it should show Gmail Actions View Merge request link'
-          it_behaves_like "an unsubscribeable thread"
+          it_behaves_like 'an unsubscribeable thread'
 
           it 'is sent as the author' do
             sender = subject.header[:from].addrs[0]
@@ -337,9 +351,11 @@ describe Notify do
           subject { Notify.merged_merge_request_email(recipient.id, merge_request.id, merge_author.id) }
 
           it_behaves_like 'a multiple recipients email'
-          it_behaves_like 'an answer to an existing thread', 'merge_request'
+          it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+            let(:model) { merge_request }
+          end
           it_behaves_like 'it should show Gmail Actions View Merge request link'
-          it_behaves_like "an unsubscribeable thread"
+          it_behaves_like 'an unsubscribeable thread'
 
           it 'is sent as the merge author' do
             sender = subject.header[:from].addrs[0]
@@ -456,9 +472,11 @@ describe Notify do
         subject { Notify.note_commit_email(recipient.id, note.id) }
 
         it_behaves_like 'a note email'
-        it_behaves_like 'an answer to an existing thread', 'commit'
+        it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+          let(:model) { commit }
+        end
         it_behaves_like 'it should show Gmail Actions View Commit link'
-        it_behaves_like "a user cannot unsubscribe through footer link"
+        it_behaves_like 'a user cannot unsubscribe through footer link'
 
         it 'has the correct subject' do
           is_expected.to have_subject /#{commit.title} \(#{commit.short_id}\)/
@@ -477,7 +495,9 @@ describe Notify do
         subject { Notify.note_merge_request_email(recipient.id, note.id) }
 
         it_behaves_like 'a note email'
-        it_behaves_like 'an answer to an existing thread', 'merge_request'
+        it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+          let(:model) { merge_request }
+        end
         it_behaves_like 'it should show Gmail Actions View Merge request link'
         it_behaves_like 'an unsubscribeable thread'
 
@@ -498,7 +518,9 @@ describe Notify do
         subject { Notify.note_issue_email(recipient.id, note.id) }
 
         it_behaves_like 'a note email'
-        it_behaves_like 'an answer to an existing thread', 'issue'
+        it_behaves_like 'an answer to an existing thread with reply-by-email enabled' do
+          let(:model) { issue }
+        end
         it_behaves_like 'it should show Gmail Actions View Issue link'
         it_behaves_like 'an unsubscribeable thread'
 

spec/mailers/shared/notify.rb

@@ -10,6 +10,13 @@ shared_context 'gitlab email notification' do
     ActionMailer::Base.deliveries.clear
     email = recipient.emails.create(email: "notifications@example.com")
     recipient.update_attribute(:notification_email, email.email)
+    stub_incoming_email_setting(enabled: true, address: "reply+%{key}@#{Gitlab.config.gitlab.host}")
+  end
+end
+
+shared_context 'reply-by-email is enabled with incoming address without %{key}' do
+  before do
+    stub_incoming_email_setting(enabled: true, address: "reply@#{Gitlab.config.gitlab.host}")
   end
 end
 
@@ -46,25 +53,76 @@ shared_examples 'an email with X-GitLab headers containing project details' do
   end
 end
 
-shared_examples 'an email starting a new thread' do |message_id_prefix|
-  include_examples 'an email with X-GitLab headers containing project details'
+shared_examples 'a new thread email with reply-by-email enabled' do
+  let(:regex) { /\A<reply\-(.*)@#{Gitlab.config.gitlab.host}>\Z/ }
+
+  it 'has a Message-ID header' do
+    is_expected.to have_header 'Message-ID', "<#{model.class.model_name.singular_route_key}_#{model.id}@#{Gitlab.config.gitlab.host}>"
+  end
 
-  it 'has a discussion identifier' do
-    is_expected.to have_header 'Message-ID',  /<#{message_id_prefix}(.*)@#{Gitlab.config.gitlab.host}>/
+  it 'has a References header' do
+    is_expected.to have_header 'References', regex
   end
 end
 
-shared_examples 'an answer to an existing thread' do |thread_id_prefix|
+shared_examples 'a thread answer email with reply-by-email enabled' do
   include_examples 'an email with X-GitLab headers containing project details'
+  let(:regex) { /\A<#{model.class.model_name.singular_route_key}_#{model.id}@#{Gitlab.config.gitlab.host}> <reply\-(.*)@#{Gitlab.config.gitlab.host}>\Z/ }
+
+  it 'has a Message-ID header' do
+    is_expected.to have_header 'Message-ID', /\A<(.*)@#{Gitlab.config.gitlab.host}>\Z/
+  end
+
+  it 'has a In-Reply-To header' do
+    is_expected.to have_header 'In-Reply-To', "<#{model.class.model_name.singular_route_key}_#{model.id}@#{Gitlab.config.gitlab.host}>"
+  end
+
+  it 'has a References header' do
+    is_expected.to have_header 'References', regex
+  end
 
   it 'has a subject that begins with Re: ' do
     is_expected.to have_subject /^Re: /
   end
+end
+
+shared_examples 'an email starting a new thread with reply-by-email enabled' do
+  include_examples 'an email with X-GitLab headers containing project details'
+  include_examples 'a new thread email with reply-by-email enabled'
 
-  it 'has headers that reference an existing thread' do
-    is_expected.to have_header 'Message-ID',  /<(.*)@#{Gitlab.config.gitlab.host}>/
-    is_expected.to have_header 'References',  /<#{thread_id_prefix}(.*)@#{Gitlab.config.gitlab.host}>/
-    is_expected.to have_header 'In-Reply-To', /<#{thread_id_prefix}(.*)@#{Gitlab.config.gitlab.host}>/
+  context 'when reply-by-email is enabled with incoming address with %{key}' do
+    it 'has a Reply-To header' do
+      is_expected.to have_header 'Reply-To', /<reply+(.*)@#{Gitlab.config.gitlab.host}>\Z/
+    end
+  end
+
+  context 'when reply-by-email is enabled with incoming address without %{key}' do
+    include_context 'reply-by-email is enabled with incoming address without %{key}'
+    include_examples 'a new thread email with reply-by-email enabled'
+
+    it 'has a Reply-To header' do
+      is_expected.to have_header 'Reply-To', /<reply@#{Gitlab.config.gitlab.host}>\Z/
+    end
+  end
+end
+
+shared_examples 'an answer to an existing thread with reply-by-email enabled' do
+  include_examples 'an email with X-GitLab headers containing project details'
+  include_examples 'a thread answer email with reply-by-email enabled'
+
+  context 'when reply-by-email is enabled with incoming address with %{key}' do
+    it 'has a Reply-To header' do
+      is_expected.to have_header 'Reply-To', /<reply+(.*)@#{Gitlab.config.gitlab.host}>\Z/
+    end
+  end
+
+  context 'when reply-by-email is enabled with incoming address without %{key}' do
+    include_context 'reply-by-email is enabled with incoming address without %{key}'
+    include_examples 'a thread answer email with reply-by-email enabled'
+
+    it 'has a Reply-To header' do
+      is_expected.to have_header 'Reply-To', /<reply@#{Gitlab.config.gitlab.host}>\Z/
+    end
   end
 end
 

spec/models/hooks/system_hook_spec.rb

@@ -20,24 +20,27 @@ require "spec_helper"
 
 describe SystemHook, models: true do
   describe "execute" do
-    before(:each) do
-      @system_hook = create(:system_hook)
-      WebMock.stub_request(:post, @system_hook.url)
+    let(:system_hook) { create(:system_hook) }
+    let(:user)        { create(:user) }
+    let(:project)     { create(:project, namespace: user.namespace) }
+    let(:group)       { create(:group) }
+
+    before do
+      WebMock.stub_request(:post, system_hook.url)
     end
 
     it "project_create hook" do
-      Projects::CreateService.new(create(:user), name: 'empty').execute
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+      Projects::CreateService.new(user, name: 'empty').execute
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /project_create/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
 
     it "project_destroy hook" do
-      user = create(:user)
-      project = create(:empty_project, namespace: user.namespace)
       Projects::DestroyService.new(project, user, {}).pending_delete!
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /project_destroy/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
@@ -45,37 +48,36 @@ describe SystemHook, models: true do
 
     it "user_create hook" do
       create(:user)
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+      
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /user_create/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
 
     it "user_destroy hook" do
-      user = create(:user)
       user.destroy
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /user_destroy/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
 
     it "project_create hook" do
-      user = create(:user)
-      project = create(:project)
       project.team << [user, :master]
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /user_add_to_team/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
 
     it "project_destroy hook" do
-      user = create(:user)
-      project = create(:project)
       project.team << [user, :master]
       project.project_members.destroy_all
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /user_remove_from_team/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
@@ -83,41 +85,39 @@ describe SystemHook, models: true do
 
     it 'group create hook' do
       create(:group)
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /group_create/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
 
     it 'group destroy hook' do
-      group = create(:group)
       group.destroy
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /group_destroy/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
 
     it 'group member create hook' do
-      group = create(:group)
-      user = create(:user)
       group.add_master(user)
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /user_add_to_group/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
 
     it 'group member destroy hook' do
-      group = create(:group)
-      user = create(:user)
       group.add_master(user)
       group.group_members.destroy_all
-      expect(WebMock).to have_requested(:post, @system_hook.url).with(
+
+      expect(WebMock).to have_requested(:post, system_hook.url).with(
         body: /user_remove_from_group/,
         headers: { 'Content-Type'=>'application/json', 'X-Gitlab-Event'=>'System Hook' }
       ).once
     end
-
   end
 end

spec/models/repository_spec.rb

@@ -558,7 +558,7 @@ describe Repository, models: true do
       end
 
       it 'flushes the exists cache' do
-        expect(repository).to receive(:expire_exists_cache)
+        expect(repository).to receive(:expire_exists_cache).twice
 
         repository.before_delete
       end

spec/support/carrierwave.rb

+CarrierWave.root = 'tmp/tests/uploads'
+
+RSpec.configure do |config|
+  config.after(:suite) do
+    FileUtils.rm_rf('tmp/tests/uploads')
+  end
+end

spec/tasks/gitlab/backup_rake_spec.rb

@@ -7,8 +7,12 @@ describe 'gitlab:app namespace rake task' do
     Rake.application.rake_require 'tasks/gitlab/backup'
     Rake.application.rake_require 'tasks/gitlab/shell'
     Rake.application.rake_require 'tasks/gitlab/db'
+
     # empty task as env is already loaded
     Rake::Task.define_task :environment
+
+    # We need this directory to run `gitlab:backup:create` task
+    FileUtils.mkdir_p('public/uploads')
   end
 
   def run_rake_task(task_name)

spec/workers/project_cache_worker_spec.rb

+require 'spec_helper'
+
+describe ProjectCacheWorker do
+  let(:project) { create(:project) }
+
+  subject { described_class.new }
+
+  describe '#perform' do
+    it 'updates project cache data' do
+
+      expect_any_instance_of(Repository).to receive(:size)
+      expect_any_instance_of(Repository).to receive(:commit_count)
+
+      expect_any_instance_of(Project).to receive(:update_repository_size)
+      expect_any_instance_of(Project).to receive(:update_commit_count)
+
+      subject.perform(project.id)
+    end
+
+    it 'handles missing repository data' do
+      expect_any_instance_of(Repository).to receive(:exists?).and_return(false)
+      expect_any_instance_of(Repository).not_to receive(:size)
+
+      subject.perform(project.id)
+    end
+  end
+end