Merge branch 'master' into check-out-branch-button

CHANGELOG

@@ -38,12 +38,15 @@ v 7.14.0 (unreleased)
   - Tweak project page buttons.
   - Disabled autocapitalize and autocorrect on login field (Daryl Chan)
   - Mention group and project name in creation, update and deletion notices (Achilleas Pipinellis)
+  - Update gravatar link on profile page to link to configured gravatar host (Ben Bodenmiller)
   - Remove redis-store TTL monkey patch
   - Add support for CI skipped status
   - Fetch code from forks to refs/merge-requests/:id/head when merge request created
   - Remove satellites
   - Remove comments and email addresses when publicly exposing ssh keys (Zeger-Jan van de Weg)
   - Add "Check out branch" button to the MR page.
+  - Improve MR merge widget text and UI consistency.
+  - Improve text in MR "How To Merge" modal.
   - Cache all events
 
 v 7.13.3

Gemfile.lock

@@ -154,7 +154,7 @@ GEM
     doorkeeper (2.1.3)
       railties (>= 3.2)
     dotenv (0.9.0)
-    dropzonejs-rails (0.4.14)
+    dropzonejs-rails (0.7.1)
       rails (> 3.1)
     email_spec (1.6.0)
       launchy (~> 2.1)
@@ -373,7 +373,7 @@ GEM
     mini_portile (0.6.2)
     minitest (5.3.5)
     mousetrap-rails (1.4.6)
-    multi_json (1.11.1)
+    multi_json (1.11.2)
     multi_xml (0.5.5)
     multipart-post (1.2.0)
     mysql2 (0.3.16)

app/assets/javascripts/dropzone_input.js.coffee

@@ -8,6 +8,7 @@ class @DropzoneInput
     divAlert = "<div class=\"" + alertClass + "\"></div>"
     iconPaperclip = "<i class=\"fa fa-paperclip div-dropzone-icon\"></i>"
     iconSpinner = "<i class=\"fa fa-spinner fa-spin div-dropzone-icon\"></i>"
+    uploadProgress = $("<div class=\"div-dropzone-progress\"></div>")
     btnAlert = "<button type=\"button\"" + alertAttr + ">&times;</button>"
     project_uploads_path = window.project_uploads_path or null
     markdown_preview_path = window.markdown_preview_path or null
@@ -28,6 +29,7 @@ class @DropzoneInput
     form_dropzone.find(".div-dropzone-hover").append iconPaperclip
     form_dropzone.append divSpinner
     form_dropzone.find(".div-dropzone-spinner").append iconSpinner
+    form_dropzone.find(".div-dropzone-spinner").append uploadProgress
     form_dropzone.find(".div-dropzone-spinner").css
       "opacity": 0
       "display": "none"
@@ -112,13 +114,18 @@ class @DropzoneInput
           $(".div-dropzone-alert").append btnAlert + errorMessage
         return
 
+      totaluploadprogress: (totalUploadProgress) ->
+        uploadProgress.text Math.round(totalUploadProgress) + "%"
+        return
+
       sending: ->
         form_dropzone.find(".div-dropzone-spinner").css
           "opacity": 0.7
           "display": "inherit"
         return
 
-      complete: ->
+      queuecomplete: ->
+        uploadProgress.text ""
         $(".dz-preview").remove()
         $(".markdown-area").trigger "input"
         $(".div-dropzone-spinner").css

app/assets/stylesheets/generic/markdown_area.scss

@@ -40,6 +40,15 @@
       font-size: inherit;
     }
 
+    .div-dropzone-progress {
+      position: absolute;
+      top: 7px;
+      left: -40px;
+      width: 35px;
+      font-size: 13px;
+      text-align: right;
+    }
+
     .dz-preview {
       display: none;
     }

app/assets/stylesheets/pages/merge_requests.scss

@@ -183,6 +183,10 @@
   width: 250px !important;
 }
 
+#modal_merge_info .modal-dialog {
+  width: 600px;
+}
+
 .mr-source-target {
   line-height: 31px;
 }

app/services/post_commit_service.rb

 class PostCommitService < BaseService
+  include Gitlab::Popen
+
+  attr_reader :changes, :repo_path
+
   def execute(sha, branch)
     commit = repository.commit(sha)
-    full_ref = 'refs/heads/' + branch
+    full_ref = Gitlab::Git::BRANCH_REF_PREFIX + branch
     old_sha = commit.parent_id || Gitlab::Git::BLANK_SHA
-    GitPushService.new.execute(project, current_user, old_sha, sha, full_ref)
+    @changes = "#{old_sha} #{sha} #{full_ref}"
+    @repo_path = repository.path_to_repo
+
+    post_receive
+  end
+
+  private
+
+  def post_receive
+    hook = hook_file('post-receive', repo_path)
+    return true if hook.nil?
+    call_receive_hook(hook)
+  end
+
+  def call_receive_hook(hook)
+    # function  will return true if succesful
+    exit_status = false
+
+    vars = {
+      'GL_ID' => Gitlab::ShellEnv.gl_id(current_user),
+      'PWD' => repo_path
+    }
+
+    options = {
+      chdir: repo_path
+    }
+
+    # we combine both stdout and stderr as we don't know what stream
+    # will be used by the custom hook
+    Open3.popen2e(vars, hook, options) do |stdin, stdout_stderr, wait_thr|
+      exit_status = true
+      stdin.sync = true
+
+      # in git, pre- and post- receive hooks may just exit without
+      # reading stdin. We catch the exception to avoid a broken pipe
+      # warning
+      begin
+        # inject all the changes as stdin to the hook
+        changes.lines do |line|
+          stdin.puts line
+        end
+      rescue Errno::EPIPE
+      end
+
+      # need to close stdin before reading stdout
+      stdin.close
+
+      # only output stdut_stderr if scripts doesn't return 0
+      unless wait_thr.value == 0
+        exit_status = false
+      end
+    end
+
+    exit_status
+  end
+
+  def hook_file(hook_type, repo_path)
+    hook_path = File.join(repo_path.strip, 'hooks')
+    hook_file = "#{hook_path}/#{hook_type}"
+    hook_file if File.exist?(hook_file)
   end
 end

app/views/events/_event.html.haml

@@ -3,7 +3,7 @@
     .event-item-timestamp
       #{time_ago_with_tooltip(event.created_at)}
 
-    = cache event, "v1" do
+    = cache [event, "v1"] do
       = image_tag avatar_icon(event.author_email, 24), class: "avatar s24", alt:''
       - if event.created_project?
         = render "events/event/created_project", event: event

app/views/profiles/show.html.haml

@@ -82,12 +82,12 @@
                 You can change your avatar here
                 - if Gitlab.config.gravatar.enabled
                   %br
-                  or remove the current avatar to revert to #{link_to "gravatar.com", "http://gravatar.com"}
+                  or remove the current avatar to revert to #{link_to Gitlab.config.gravatar.host, "http://" + Gitlab.config.gravatar.host}
               - else
                 You can upload an avatar here
                 - if Gitlab.config.gravatar.enabled
                   %br
-                  or change it at #{link_to "gravatar.com", "http://gravatar.com"}
+                  or change it at #{link_to Gitlab.config.gravatar.host, "http://" + Gitlab.config.gravatar.host}
             %hr
             %a.choose-btn.btn.btn-sm.js-choose-user-avatar-button
               %i.fa.fa-paperclip

app/views/projects/merge_requests/show/_how_to_merge.html.haml

@@ -3,42 +3,45 @@
     .modal-content
       .modal-header
         %a.close{href: "#", "data-dismiss" => "modal"} ×
-        %h3 How to merge
+        %h3 Check out, review and merge locally
       .modal-body
-        - if @merge_request.for_fork?
-          - source_remote = @merge_request.source_project.namespace.nil? ? "source" :@merge_request.source_project.namespace.path
-          - target_remote = @merge_request.target_project.namespace.nil? ? "target" :@merge_request.target_project.namespace.path
-          %p
-            %strong Step 1.
-            Fetch the code and create a new branch pointing to it
-          %pre.dark
+        %p
+          %strong Step 1. 
+          Fetch and check out the branch for this merge request
+        %pre.dark
+          - if @merge_request.for_fork?
             :preserve
               git fetch #{@merge_request.source_project.http_url_to_repo} #{@merge_request.source_branch}
               git checkout -b #{@merge_request.source_project_path}-#{@merge_request.source_branch} FETCH_HEAD
-          %p
-            %strong Step 2.
-            Merge the branch and push the changes to GitLab
-          %pre.dark
-            :preserve
-              git checkout #{@merge_request.target_branch}
-              git merge --no-ff #{@merge_request.source_project_path}-#{@merge_request.source_branch}
-              git push origin #{@merge_request.target_branch}
-        - else
-          %p
-            %strong Step 1.
-            Update the repo and checkout the branch we are going to merge
-          %pre.dark
+          - else
             :preserve
               git fetch origin
               git checkout -b #{@merge_request.source_branch} origin/#{@merge_request.source_branch}
-          %p
-            %strong Step 2.
-            Merge the branch and push the changes to GitLab
-          %pre.dark
+        %p
+          %strong Step 2.
+          Review the changes locally
+
+        %p
+          %strong Step 3.
+          Merge the branch and fix any conflicts that come up
+        %pre.dark
+          - if @merge_request.for_fork?
+            :preserve
+              git checkout #{@merge_request.target_branch}
+              git merge --no-ff #{@merge_request.source_project_path}-#{@merge_request.source_branch}
+          - else
             :preserve
               git checkout #{@merge_request.target_branch}
               git merge --no-ff #{@merge_request.source_branch}
-              git push origin #{@merge_request.target_branch}
+        %p
+          %strong Step 4.
+          Push the result of the merge to GitLab
+        %pre.dark
+          :preserve
+            git push origin #{@merge_request.target_branch}
+        - unless @merge_request.can_be_merged_by?(current_user)
+          %p
+            Note that pushing to GitLab requires write access to this repository.
 
 :javascript
   $(function(){

app/views/projects/merge_requests/widget/_closed.html.haml

@@ -6,4 +6,7 @@
       - if @merge_request.closed_event
         by #{link_to_member(@project, @merge_request.closed_event.author, avatar: true)}
         #{time_ago_with_tooltip(@merge_request.closed_event.created_at)}
-    %p Changes were not merged into target branch
+    %p 
+      = succeed '.' do
+        The changes were not merged into
+        %span.label-branch= @merge_request.target_branch

app/views/projects/merge_requests/widget/_heading.html.haml

@@ -3,26 +3,26 @@
     - [:success, :skipped, :canceled, :failed, :running, :pending].each do |status|
       .ci_widget{class: "ci-#{status}", style: "display:none"}
         - if status == :success
+          - status = "passed"
           = icon("check-circle")
         - else
           = icon("circle")
         %span CI build #{status}
         for #{@merge_request.last_commit_short_sha}.
         %span.ci-coverage
-        = link_to "View build page", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
+        = link_to "View build details", ci_build_details_path(@merge_request), :"data-no-turbolink" => "data-no-turbolink"
 
     .ci_widget
       = icon("spinner spin")
-      Checking for CI status for #{@merge_request.last_commit_short_sha}
+      Checking CI status for #{@merge_request.last_commit_short_sha}…
 
     .ci_widget.ci-not_found{style: "display:none"}
       = icon("times-circle")
-      %span Can not find commit in the CI server
-      for #{@merge_request.last_commit_short_sha}.
+      Could not find CI status for #{@merge_request.last_commit_short_sha}.
 
     .ci_widget.ci-error{style: "display:none"}
       = icon("times-circle")
-      %span Cannot connect to the CI server. Please check your settings and try again.
+      Could not connect to the CI server. Please check your settings and try again.
 
   :coffeescript
     $ ->

app/views/projects/merge_requests/widget/_locked.html.haml

@@ -2,7 +2,8 @@
   = render 'projects/merge_requests/widget/heading'
   .mr-widget-body
     %h4
-      Merge in progress...
+      = icon("spinner spin")
+      Merge in progress…
     %p
-      Merging is in progress. While merging this request is locked and cannot be closed.
+      This merge request is in the process of being merged, during which time it is locked and cannot be closed.
 

app/views/projects/merge_requests/widget/_merged.html.haml

@@ -7,23 +7,31 @@
         by #{link_to_member(@project, @merge_request.merge_event.author, avatar: true)}
         #{time_ago_with_tooltip(@merge_request.merge_event.created_at)}
     %div
-      - if @source_branch.blank?
-        Source branch has been removed
+      - if !@merge_request.source_branch_exists?
+        = succeed '.' do
+          The changes were merged into
+          %span.label-branch= @merge_request.target_branch
+        The source branch has been removed.
 
-      - elsif can_remove_branch?(@merge_request.source_project, @merge_request.source_branch) && @merge_request.merged?
+      - elsif can_remove_branch?(@merge_request.source_project, @merge_request.source_branch)
         .remove_source_branch_widget
-          %p Changes merged into #{@merge_request.target_branch}. You can remove source branch now
+          %p 
+            = succeed '.' do
+              The changes were merged into
+              %span.label-branch= @merge_request.target_branch
+            You can remove the source branch now.
           = link_to namespace_project_branch_path(@merge_request.source_project.namespace, @merge_request.source_project, @source_branch), remote: true, method: :delete, class: "btn btn-primary btn-sm remove_source_branch" do
             %i.fa.fa-times
             Remove Source Branch
 
         .remove_source_branch_widget.failed.hide
-          Failed to remove source branch '#{@merge_request.source_branch}'
+          %p 
+            Failed to remove source branch '#{@merge_request.source_branch}'.
 
         .remove_source_branch_in_progress.hide
-          %i.fa.fa-spinner.fa-spin
-           
-          Removing source branch '#{@merge_request.source_branch}'. Please wait. Page will be automatically reloaded.  
+          %p
+            = icon('spinner spin')
+            Removing source branch '#{@merge_request.source_branch}'. Please wait. This page will be automatically reload.
 
         :coffeescript
           $('.remove_source_branch').on 'click', ->

app/views/projects/merge_requests/widget/_open.html.haml

@@ -22,6 +22,6 @@
     .mr-widget-footer
       %span
         %i.fa.fa-check
-        Accepting this merge request will close #{@closes_issues.size == 1 ? 'issue' : 'issues'}
+        Accepting this merge request will close #{"issue".pluralize(@closes_issues.size)}
         = succeed '.' do
           != gfm(issues_sentence(@closes_issues))

app/views/projects/merge_requests/widget/open/_accept.html.haml

@@ -8,10 +8,10 @@
       .accept-control.checkbox
         = label_tag :should_remove_source_branch, class: "remove_source_checkbox" do
           = check_box_tag :should_remove_source_branch
-          Remove source-branch
+          Remove source branch
     .accept-control
-      = link_to "#", class: "modify-merge-commit-link js-toggle-button", title: "Modify merge commit message" do
-        %i.fa.fa-edit
+      = link_to "#", class: "modify-merge-commit-link js-toggle-button" do
+        = icon('edit')
         Modify commit message
     .js-toggle-content.hide.prepend-top-20
       = render 'shared/commit_message_container', params: params,

app/views/projects/merge_requests/widget/open/_archived.html.haml

+%h4 
+  Project is archived
 %p
-  %strong Archived projects do not provide commit access.
+  This merge request cannot be merged because archived projects cannot be written to.

app/views/projects/merge_requests/widget/open/_check.html.haml

 %strong
-  %i.fa.fa-spinner.fa-spin
-  Checking automatic merge…
+  = icon("spinner spin")
+  Checking ability to merge automatically…
 
 :coffeescript
   $ ->

app/views/projects/merge_requests/widget/open/_conflicts.html.haml

 %h4
-  This merge request contains merge conflicts that must be resolved.
+  = icon("exclamation-triangle")
+  This merge request contains merge conflicts
 
-- if @merge_request.can_be_merged_by?(current_user)
-  %p
-    You can merge it manually using the
-    %strong
-      = link_to "command line", "#modal_merge_info", class: "how_to_merge_link vlink", title: "How To Merge", "data-toggle" => "modal"
-- else
-  %p
-    Only those with write access to this repository can merge merge requests.
+%p
+  Please resolve these conflicts or 
+  - if @merge_request.can_be_merged_by?(current_user)
+    #{link_to "merge this request manually", "#modal_merge_info", class: "how_to_merge_link vlink", "data-toggle" => "modal"}.
+  - else
+    ask someone with write access to this repository to merge this request manually.

app/views/projects/merge_requests/widget/open/_missing_branch.html.haml

-%h4
-  Can't be merged
-%p
-  This merge request can not be accepted because branch
-  - unless @merge_request.source_branch_exists?
-    %span.label.label-inverse= @merge_request.source_branch
-    does not exist in
-    %span.label.label-info= @merge_request.source_project_path
-    %br
-    %strong Please close this merge request and open a new merge request to change source branches.
-  - else
-    %span.label.label-inverse= @merge_request.target_branch
-    does not exist in
-    %span.label.label-info= @merge_request.target_project_path
-    %br
-    %strong Please close this merge request or change to another target branch.
+- unless @merge_request.source_branch_exists?
+  %h4
+    = icon("exclamation-triangle")
+    Source branch
+    %span.label-branch= source_branch_with_namespace(@merge_request)
+    does not exist
+  %p
+    Please restore the source branch or close this merge request and open a new merge request with a different source branch.
+- else
+  %h4
+    = icon("exclamation-triangle")
+    Target branch
+    %span.label-branch= @merge_request.target_branch
+    does not exist
+  %p
+    Please restore the target branch or use a different target branch.

app/views/projects/merge_requests/widget/open/_not_allowed.html.haml

-%strong This request can be merged automatically.
-Only those with write access to this repository can merge merge requests.
+%h4 
+  Ready to be merged automatically
+%p
+  Ask someone with write access to this repository to merge this request.

app/views/projects/merge_requests/widget/open/_nothing.html.haml

-%h4 Nothing to merge
-%p
+%h4 
+  = icon("exclamation-triangle")
   Nothing to merge from
-  %span.label-branch #{@merge_request.source_branch}
-  to
-  %span.label-branch #{@merge_request.target_branch}
-  %br
-  Try to use different branches or push new code.
+  %span.label-branch= source_branch_with_namespace(@merge_request)
+  into
+  %span.label-branch= @merge_request.target_branch
+%p
+  Please push new commits to the source branch or use a different target branch.

app/views/projects/merge_requests/widget/open/_reload.html.haml

-This merge request cannot be merged. Try to reload the page.
+%h4
+  = icon("exclamation-triangle")
+  This merge request failed to be merged automatically
+
+%p
+  Please reload the page to find out the reason.

app/views/projects/merge_requests/widget/open/_wip.html.haml

-- if @merge_request.can_be_merged_by?(current_user)
-  %h4
-    This merge request cannot be accepted because it is marked as Work In Progress.
+%h4
+  This merge request is currently a Work In Progress
 
-  %p
-    %button.btn.disabled{:type => 'button'}
-      %i.fa.fa-warning
-      Accept Merge Request
-     
-    When the merge request is ready, remove the "WIP" prefix from the title to allow it to be accepted.
-- else
-  %strong This merge request is marked as Work In Progress.
-  Only those with write access to this repository can merge merge requests.
+%p
+  When this merge request is ready, remove the "WIP" prefix from the title to allow it to be merged.

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

@@ -16,10 +16,10 @@
       %p.help-block
         - if issuable.work_in_progress?
           Remove the <code>WIP</code> prefix from the title to allow this
-          <strong>Work In Progress</strong> merge request to be accepted when it's ready.
+          <strong>Work In Progress</strong> merge request to be merged when it's ready.
         - else
           Start the title with <code>[WIP]</code> or <code>WIP:</code> to prevent a
-          <strong>Work In Progress</strong> merge request from being accepted before it's ready.
+          <strong>Work In Progress</strong> merge request from being merged before it's ready.
 .form-group.issuable-description
   = f.label :description, 'Description', class: 'control-label'
   .col-sm-10

app/workers/post_receive.rb

@@ -45,7 +45,7 @@ class PostReceive
 
   def utf8_encode_changes(changes)
     changes = changes.dup
-    
+
     changes.force_encoding("UTF-8")
     return changes if changes.valid_encoding?
 

config/initializers/1_settings.rb

@@ -8,6 +8,15 @@ class Settings < Settingslogic
     def gitlab_on_standard_port?
       gitlab.port.to_i == (gitlab.https ? 443 : 80)
     end
+    
+    # get host without www, thanks to http://stackoverflow.com/a/6674363/1233435
+    def get_host_without_www(url)
+      url = URI.encode(url)
+      uri = URI.parse(url)
+      uri = URI.parse("http://#{url}") if uri.scheme.nil?
+      host = uri.host.downcase
+      host.start_with?('www.') ? host[4..-1] : host
+    end
 
     private
 
@@ -147,6 +156,7 @@ Settings['gravatar'] ||= Settingslogic.new({})
 Settings.gravatar['enabled']      = true if Settings.gravatar['enabled'].nil?
 Settings.gravatar['plain_url']  ||= 'http://www.gravatar.com/avatar/%{hash}?s=%{size}&d=identicon'
 Settings.gravatar['ssl_url']    ||= 'https://secure.gravatar.com/avatar/%{hash}?s=%{size}&d=identicon'
+Settings.gravatar['host']         = Settings.get_host_without_www(Settings.gravatar['plain_url'])
 
 #
 # GitLab Shell

features/profile/profile.feature

@@ -35,6 +35,7 @@ Feature: Profile
     Then I change my avatar
     And I should see new avatar
     And I should see the "Remove avatar" button
+    And I should see the gravatar host link
 
   Scenario: I remove my avatar
     Given I visit profile page
@@ -42,6 +43,7 @@ Feature: Profile
     When I remove my avatar
     Then I should see my gravatar
     And I should not see the "Remove avatar" button
+    And I should see the gravatar host link
 
   Scenario: My password is expired
     Given my password is expired

features/steps/profile/profile.rb

@@ -59,6 +59,10 @@ class Spinach::Features::Profile < Spinach::FeatureSteps
   step 'I should not see the "Remove avatar" button' do
     expect(page).not_to have_link("Remove avatar")
   end
+  
+  step 'I should see the gravatar host link' do
+    expect(page).to have_link("gravatar.com")
+  end
 
   step 'I try change my password w/o old one' do
     page.within '.update-password' do

lib/gitlab/markdown/commit_range_reference_filter.rb

@@ -57,10 +57,11 @@ module Gitlab
 
             title = range.reference_title
             klass = reference_class(:commit_range)
+            data  = data_attribute(project.id)
 
             project_ref += '@' if project_ref
 
-            %(<a href="#{url}"
+            %(<a href="#{url}" #{data}
                  title="#{title}"
                  class="#{klass}">#{project_ref}#{range}</a>)
           else

lib/gitlab/markdown/commit_reference_filter.rb

@@ -47,10 +47,11 @@ module Gitlab
 
             title = escape_once(commit.link_title)
             klass = reference_class(:commit)
+            data  = data_attribute(project.id)
 
             project_ref += '@' if project_ref
 
-            %(<a href="#{url}"
+            %(<a href="#{url}" #{data}
                  title="#{title}"
                  class="#{klass}">#{project_ref}#{commit.short_id}</a>)
           else

lib/gitlab/markdown/issue_reference_filter.rb

@@ -49,8 +49,9 @@ module Gitlab
 
             title = escape_once("Issue: #{issue.title}")
             klass = reference_class(:issue)
+            data  = data_attribute(project.id)
 
-            %(<a href="#{url}"
+            %(<a href="#{url}" #{data}
                  title="#{title}"
                  class="#{klass}">#{match}</a>)
           else

lib/gitlab/markdown/label_reference_filter.rb

@@ -43,8 +43,9 @@ module Gitlab
 
             url = url_for_label(project, label)
             klass = reference_class(:label)
+            data = data_attribute(project.id)
 
-            %(<a href="#{url}"
+            %(<a href="#{url}" #{data}
                  class="#{klass}">#{render_colored_label(label)}</a>)
           else
             match

lib/gitlab/markdown/merge_request_reference_filter.rb

@@ -47,10 +47,11 @@ module Gitlab
 
             title = escape_once("Merge Request: #{merge_request.title}")
             klass = reference_class(:merge_request)
+            data  = data_attribute(project.id)
 
             url = url_for_merge_request(merge_request, project)
 
-            %(<a href="#{url}"
+            %(<a href="#{url}" #{data}
                  title="#{title}"
                  class="#{klass}">#{match}</a>)
           else

lib/gitlab/markdown/reference_filter.rb

@@ -21,6 +21,22 @@ module Gitlab
         result[:references] = Hash.new { |hash, type| hash[type] = [] }
       end
 
+      # Returns a data attribute String to attach to a reference link
+      #
+      # id   - Object ID
+      # type - Object type (default: :project)
+      #
+      # Examples:
+      #
+      #   data_attribute(1)         # => "data-project-id=\"1\""
+      #   data_attribute(2, :user)  # => "data-user-id=\"2\""
+      #   data_attribute(3, :group) # => "data-group-id=\"3\""
+      #
+      # Returns a String
+      def data_attribute(id, type = :project)
+        %Q(data-#{type}-id="#{id}")
+      end
+
       def escape_once(html)
         ERB::Util.html_escape_once(html)
       end

lib/gitlab/markdown/snippet_reference_filter.rb

@@ -47,10 +47,11 @@ module Gitlab
 
             title = escape_once("Snippet: #{snippet.title}")
             klass = reference_class(:snippet)
+            data  = data_attribute(project.id)
 
             url = url_for_snippet(snippet, project)
 
-            %(<a href="#{url}"
+            %(<a href="#{url}" #{data}
                  title="#{title}"
                  class="#{klass}">#{match}</a>)
           else

lib/gitlab/markdown/user_reference_filter.rb

@@ -83,18 +83,20 @@ module Gitlab
         push_result(:user, *namespace.users)
 
         url = urls.group_url(group, only_path: context[:only_path])
+        data = data_attribute(namespace.id, :group)
 
         text = Group.reference_prefix + group
-        %(<a href="#{url}" class="#{link_class}">#{text}</a>)
+        %(<a href="#{url}" #{data} class="#{link_class}">#{text}</a>)
       end
 
       def link_to_user(user, namespace)
         push_result(:user, namespace.owner)
 
         url = urls.user_url(user, only_path: context[:only_path])
+        data = data_attribute(namespace.owner_id, :user)
 
         text = User.reference_prefix + user
-        %(<a href="#{url}" class="#{link_class}">#{text}</a>)
+        %(<a href="#{url}" #{data} class="#{link_class}">#{text}</a>)
       end
 
       def user_can_reference_group?(group)

spec/lib/gitlab/markdown/commit_range_reference_filter_spec.rb

@@ -80,6 +80,14 @@ module Gitlab::Markdown
         expect(doc.css('a').first.attr('class')).to include 'custom'
       end
 
+      it 'includes a data-project-id attribute' do
+        doc = filter("See #{reference}")
+        link = doc.css('a').first
+
+        expect(link).to have_attribute('data-project-id')
+        expect(link.attr('data-project-id')).to eq project.id.to_s
+      end
+
       it 'supports an :only_path option' do
         doc = filter("See #{reference}", only_path: true)
         link = doc.css('a').first.attr('href')

spec/lib/gitlab/markdown/commit_reference_filter_spec.rb

@@ -76,6 +76,14 @@ module Gitlab::Markdown
         expect(doc.css('a').first.attr('class')).to include 'custom'
       end
 
+      it 'includes a data-project-id attribute' do
+        doc = filter("See #{reference}")
+        link = doc.css('a').first
+
+        expect(link).to have_attribute('data-project-id')
+        expect(link.attr('data-project-id')).to eq project.id.to_s
+      end
+
       it 'supports an :only_path context' do
         doc = filter("See #{reference}", only_path: true)
         link = doc.css('a').first.attr('href')

spec/lib/gitlab/markdown/issue_reference_filter_spec.rb

@@ -73,6 +73,14 @@ module Gitlab::Markdown
         expect(doc.css('a').first.attr('class')).to include 'custom'
       end
 
+      it 'includes a data-project-id attribute' do
+        doc = filter("Issue #{reference}")
+        link = doc.css('a').first
+
+        expect(link).to have_attribute('data-project-id')
+        expect(link.attr('data-project-id')).to eq project.id.to_s
+      end
+
       it 'supports an :only_path context' do
         doc = filter("Issue #{reference}", only_path: true)
         link = doc.css('a').first.attr('href')

spec/lib/gitlab/markdown/label_reference_filter_spec.rb

@@ -30,6 +30,14 @@ module Gitlab::Markdown
       expect(doc.css('a').first.attr('class')).to include 'custom'
     end
 
+    it 'includes a data-project-id attribute' do
+      doc = filter("Label #{reference}")
+      link = doc.css('a').first
+
+      expect(link).to have_attribute('data-project-id')
+      expect(link.attr('data-project-id')).to eq project.id.to_s
+    end
+
     it 'supports an :only_path context' do
       doc = filter("Label #{reference}", only_path: true)
       link = doc.css('a').first.attr('href')

spec/lib/gitlab/markdown/merge_request_reference_filter_spec.rb

@@ -61,6 +61,14 @@ module Gitlab::Markdown
         expect(doc.css('a').first.attr('class')).to include 'custom'
       end
 
+      it 'includes a data-project-id attribute' do
+        doc = filter("Merge #{reference}")
+        link = doc.css('a').first
+
+        expect(link).to have_attribute('data-project-id')
+        expect(link.attr('data-project-id')).to eq project.id.to_s
+      end
+
       it 'supports an :only_path context' do
         doc = filter("Merge #{reference}", only_path: true)
         link = doc.css('a').first.attr('href')

spec/lib/gitlab/markdown/snippet_reference_filter_spec.rb

@@ -60,6 +60,14 @@ module Gitlab::Markdown
         expect(doc.css('a').first.attr('class')).to include 'custom'
       end
 
+      it 'includes a data-project-id attribute' do
+        doc = filter("Snippet #{reference}")
+        link = doc.css('a').first
+
+        expect(link).to have_attribute('data-project-id')
+        expect(link.attr('data-project-id')).to eq project.id.to_s
+      end
+
       it 'supports an :only_path context' do
         doc = filter("Snippet #{reference}", only_path: true)
         link = doc.css('a').first.attr('href')

spec/lib/gitlab/markdown/user_reference_filter_spec.rb

@@ -64,6 +64,14 @@ module Gitlab::Markdown
         expect(doc.css('a').length).to eq 1
       end
 
+      it 'includes a data-user-id attribute' do
+        doc = filter("Hey #{reference}")
+        link = doc.css('a').first
+
+        expect(link).to have_attribute('data-user-id')
+        expect(link.attr('data-user-id')).to eq user.namespace.owner_id.to_s
+      end
+
       it 'adds to the results hash' do
         result = pipeline_result("Hey #{reference}")
         expect(result[:references][:user]).to eq [user]
@@ -85,6 +93,14 @@ module Gitlab::Markdown
           expect(doc.css('a').first.attr('href')).to eq urls.group_url(group)
         end
 
+        it 'includes a data-group-id attribute' do
+          doc = filter("Hey #{reference}", current_user: user)
+          link = doc.css('a').first
+
+          expect(link).to have_attribute('data-group-id')
+          expect(link.attr('data-group-id')).to eq group.id.to_s
+        end
+
         it 'adds to the results hash' do
           result = pipeline_result("Hey #{reference}", current_user: user)
           expect(result[:references][:user]).to eq group.users