18 files changed, 87 insertions, 28 deletions

diff --git a/Gemfile.lock b/Gemfile.lock
index b865ff6ee32..79d1bc51358 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -744,6 +744,7 @@ GEM
     rubocop-gitlab-security (0.0.6)
       rubocop (>= 0.47.1)
     rubocop-rspec (1.15.1)
+      rubocop (>= 0.42.0)
     ruby-fogbugz (0.2.1)
       crack (~> 0.4)
     ruby-prof (0.16.2)
diff --git a/app/assets/javascripts/dispatcher.js b/app/assets/javascripts/dispatcher.js
index 7cc7636cca3..8c5a4367440 100644
--- a/app/assets/javascripts/dispatcher.js
+++ b/app/assets/javascripts/dispatcher.js
@@ -76,6 +76,7 @@ import initLegacyFilters from './init_legacy_filters';
 import initIssuableSidebar from './init_issuable_sidebar';
 import GpgBadges from './gpg_badges';
 import UserFeatureHelper from './helpers/user_feature_helper';
+import initChangesDropdown from './init_changes_dropdown';
 
 (function() {
   var Dispatcher;
@@ -228,6 +229,7 @@ import UserFeatureHelper from './helpers/user_feature_helper';
           break;
         case 'projects:compare:show':
           new gl.Diff();
+          initChangesDropdown();
           break;
         case 'projects:branches:new':
         case 'projects:branches:create':
@@ -320,6 +322,7 @@ import UserFeatureHelper from './helpers/user_feature_helper';
             container: '.js-commit-pipeline-graph',
           }).bindEvents();
           initNotes();
+          initChangesDropdown();
           $('.commit-info.branches').load(document.querySelector('.js-commit-box').dataset.commitPath);
           break;
         case 'projects:commit:pipelines':
diff --git a/app/assets/javascripts/fly_out_nav.js b/app/assets/javascripts/fly_out_nav.js
index aabea56408a..ad957f132b8 100644
--- a/app/assets/javascripts/fly_out_nav.js
+++ b/app/assets/javascripts/fly_out_nav.js
@@ -49,7 +49,8 @@ export const hideSubLevelItems = (el) => {
 
   el.classList.remove('is-showing-fly-out');
   el.classList.remove('is-over');
-  subItems.style.display = 'none';
+  subItems.style.display = '';
+  subItems.style.transform = '';
   subItems.classList.remove('is-above');
 };
 
diff --git a/app/assets/javascripts/init_changes_dropdown.js b/app/assets/javascripts/init_changes_dropdown.js
new file mode 100644
index 00000000000..f785ed29e6c
--- /dev/null
+++ b/app/assets/javascripts/init_changes_dropdown.js
@@ -0,0 +1,10 @@
+import stickyMonitor from './lib/utils/sticky';
+
+export default () => {
+  stickyMonitor(document.querySelector('.js-diff-files-changed'));
+
+  $('.js-diff-stats-dropdown').glDropdown({
+    filterable: true,
+    remoteFilter: false,
+  });
+};
diff --git a/app/assets/javascripts/merge_request_tabs.js b/app/assets/javascripts/merge_request_tabs.js
index 4ffd71d9de5..0294da3f20d 100644
--- a/app/assets/javascripts/merge_request_tabs.js
+++ b/app/assets/javascripts/merge_request_tabs.js
@@ -7,7 +7,7 @@ import Cookies from 'js-cookie';
 import './breakpoints';
 import './flash';
 import BlobForkSuggestion from './blob/blob_fork_suggestion';
-import stickyMonitor from './lib/utils/sticky';
+import initChangesDropdown from './init_changes_dropdown';
 
 /* eslint-disable max-len */
 // MergeRequestTabs
@@ -267,9 +267,7 @@ import stickyMonitor from './lib/utils/sticky';
           const $container = $('#diffs');
           $container.html(data.html);
 
-          this.initChangesDropdown();
-
-          stickyMonitor(document.querySelector('.js-diff-files-changed'));
+          initChangesDropdown();
 
           if (typeof gl.diffNotesCompileComponents !== 'undefined') {
             gl.diffNotesCompileComponents();
@@ -319,13 +317,6 @@ import stickyMonitor from './lib/utils/sticky';
       });
     }
 
-    initChangesDropdown() {
-      $('.js-diff-stats-dropdown').glDropdown({
-        filterable: true,
-        remoteFilter: false,
-      });
-    }
-
     // Show or hide the loading spinner
     //
     // status - Boolean, true to show, false to hide
diff --git a/app/assets/stylesheets/pages/diff.scss b/app/assets/stylesheets/pages/diff.scss
index da77346d8b2..215bedc04fd 100644
--- a/app/assets/stylesheets/pages/diff.scss
+++ b/app/assets/stylesheets/pages/diff.scss
@@ -574,10 +574,14 @@
   @media (min-width: $screen-sm-min) {
     position: -webkit-sticky;
     position: sticky;
-    top: 84px;
+    top: 34px;
     background-color: $white-light;
     z-index: 190;
 
+    &.diff-files-changed-merge-request {
+      top: 84px;
+    }
+
     + .files,
     + .alert {
       margin-top: 1px;
diff --git a/app/controllers/projects/issues_controller.rb b/app/controllers/projects/issues_controller.rb
index e2ccabb22db..f4d4cca8dd8 100644
--- a/app/controllers/projects/issues_controller.rb
+++ b/app/controllers/projects/issues_controller.rb
@@ -257,18 +257,6 @@ class Projects::IssuesController < Projects::ApplicationController
     return render_404 unless @project.feature_available?(:issues, current_user)
   end
 
-  def redirect_to_external_issue_tracker
-    external = @project.external_issue_tracker
-
-    return unless external
-
-    if action_name == 'new'
-      redirect_to external.new_issue_path
-    else
-      redirect_to external.issue_tracker_path
-    end
-  end
-
   def issue_params
     params.require(:issue).permit(*issue_params_attributes)
   end
diff --git a/app/views/projects/diffs/_diffs.html.haml b/app/views/projects/diffs/_diffs.html.haml
index 25a5dfc2aaa..178ab3df2e5 100644
--- a/app/views/projects/diffs/_diffs.html.haml
+++ b/app/views/projects/diffs/_diffs.html.haml
@@ -2,8 +2,9 @@
 - show_whitespace_toggle = local_assigns.fetch(:show_whitespace_toggle, true)
 - can_create_note = !@diff_notes_disabled && can?(current_user, :create_note, diffs.project)
 - diff_files = diffs.diff_files
+- merge_request = local_assigns.fetch(:merge_request, false)
 
-.content-block.oneline-block.files-changed.diff-files-changed.js-diff-files-changed
+.content-block.oneline-block.files-changed.diff-files-changed.js-diff-files-changed{ class: ("diff-files-changed-merge-request" if merge_request) }
   .files-changed-inner
     .inline-parallel-buttons
       - if !diffs_expanded? && diff_files.any? { |diff_file| diff_file.collapsed? }
diff --git a/app/views/projects/merge_requests/diffs/_diffs.html.haml b/app/views/projects/merge_requests/diffs/_diffs.html.haml
index fb31e2fef00..0d30d6da68f 100644
--- a/app/views/projects/merge_requests/diffs/_diffs.html.haml
+++ b/app/views/projects/merge_requests/diffs/_diffs.html.haml
@@ -1,5 +1,5 @@
 - if @merge_request_diff.collected? || @merge_request_diff.overflow?
   = render 'projects/merge_requests/diffs/versions'
-  = render "projects/diffs/diffs", diffs: @diffs, environment: @environment
+  = render "projects/diffs/diffs", diffs: @diffs, environment: @environment, merge_request: true
 - elsif @merge_request_diff.empty?
   .nothing-here-block Nothing to merge from #{@merge_request.source_branch} into #{@merge_request.target_branch}
diff --git a/config/routes/repository.rb b/config/routes/repository.rb
index 2ba16035ece..57b7c55423d 100644
--- a/config/routes/repository.rb
+++ b/config/routes/repository.rb
@@ -3,6 +3,9 @@
 resource :repository, only: [:create] do
   member do
     get ':ref/archive', constraints: { format: Gitlab::PathRegex.archive_formats_regex, ref: /.+/ }, action: 'archive', as: 'archive'
+    
+    # deprecated since GitLab 9.5
+    get 'archive', constraints: { format: Gitlab::PathRegex.archive_formats_regex }, as: 'archive_alternative'
   end
 end
 
diff --git a/doc/install/installation.md b/doc/install/installation.md
index e335fc99fbf..b14cb2d44c4 100644
--- a/doc/install/installation.md
+++ b/doc/install/installation.md
@@ -66,6 +66,9 @@ Install the required packages (needed to compile Ruby and native extensions to R
 
     sudo apt-get install -y build-essential zlib1g-dev libyaml-dev libssl-dev libgdbm-dev libre2-dev libreadline-dev libncurses5-dev libffi-dev curl openssh-server checkinstall libxml2-dev libxslt-dev libcurl4-openssl-dev libicu-dev logrotate python-docutils pkg-config cmake
 
+Ubuntu 14.04 (Trusty Tahr) doesn't have the `libre2-dev` package available, but
+you can [install re2 manually](https://github.com/google/re2/wiki/Install).
+
 If you want to use Kerberos for user authentication, then install libkrb5-dev:
 
     sudo apt-get install libkrb5-dev
diff --git a/doc/update/8.17-to-9.0.md b/doc/update/8.17-to-9.0.md
index 4d3ababaa41..2abc57da1a0 100644
--- a/doc/update/8.17-to-9.0.md
+++ b/doc/update/8.17-to-9.0.md
@@ -264,6 +264,16 @@ sudo systemctl daemon-reload
 
 ### 9. Install libs, migrations, etc.
 
+GitLab 9.0.11 [introduced](https://gitlab.com/gitlab-org/gitlab-ce/issues/24570)
+a dependency on on the `re2` regular expression library. To install this dependency:
+
+```bash
+sudo apt-get install libre2-dev
+```
+
+Ubuntu 14.04 (Trusty Tahr) doesn't have the `libre2-dev` package available, but
+you can [install re2 manually](https://github.com/google/re2/wiki/Install).
+
 ```bash
 cd /home/git/gitlab
 
diff --git a/doc/update/9.0-to-9.1.md b/doc/update/9.0-to-9.1.md
index 2b4a7bed27f..3fd1d023d2a 100644
--- a/doc/update/9.0-to-9.1.md
+++ b/doc/update/9.0-to-9.1.md
@@ -264,6 +264,16 @@ sudo systemctl daemon-reload
 
 ### 9. Install libs, migrations, etc.
 
+GitLab 9.1.8 [introduced](https://gitlab.com/gitlab-org/gitlab-ce/issues/24570)
+a dependency on on the `re2` regular expression library. To install this dependency:
+
+```bash
+sudo apt-get install libre2-dev
+```
+
+Ubuntu 14.04 (Trusty Tahr) doesn't have the `libre2-dev` package available, but
+you can [install re2 manually](https://github.com/google/re2/wiki/Install).
+
 ```bash
 cd /home/git/gitlab
 
diff --git a/doc/update/9.1-to-9.2.md b/doc/update/9.1-to-9.2.md
index 6f19d16ad74..5f7a616cc7d 100644
--- a/doc/update/9.1-to-9.2.md
+++ b/doc/update/9.1-to-9.2.md
@@ -222,6 +222,16 @@ sudo systemctl daemon-reload
 
 ### 10. Install libs, migrations, etc.
 
+GitLab 9.2.8 [introduced](https://gitlab.com/gitlab-org/gitlab-ce/issues/24570)
+a dependency on on the `re2` regular expression library. To install this dependency:
+
+```bash
+sudo apt-get install libre2-dev
+```
+
+Ubuntu 14.04 (Trusty Tahr) doesn't have the `libre2-dev` package available, but
+you can [install re2 manually](https://github.com/google/re2/wiki/Install).
+
 ```bash
 cd /home/git/gitlab
 
diff --git a/doc/update/9.2-to-9.3.md b/doc/update/9.2-to-9.3.md
index 9415fa1fcd6..9d0b0da7edb 100644
--- a/doc/update/9.2-to-9.3.md
+++ b/doc/update/9.2-to-9.3.md
@@ -258,6 +258,16 @@ sudo systemctl daemon-reload
 
 ### 12. Install libs, migrations, etc.
 
+GitLab 9.3.8 [introduced](https://gitlab.com/gitlab-org/gitlab-ce/issues/24570)
+a dependency on on the `re2` regular expression library. To install this dependency:
+
+```bash
+sudo apt-get install libre2-dev
+```
+
+Ubuntu 14.04 (Trusty Tahr) doesn't have the `libre2-dev` package available, but
+you can [install re2 manually](https://github.com/google/re2/wiki/Install).
+
 ```bash
 cd /home/git/gitlab
 
diff --git a/doc/update/9.3-to-9.4.md b/doc/update/9.3-to-9.4.md
index 982385f3c24..9ee01bc9c51 100644
--- a/doc/update/9.3-to-9.4.md
+++ b/doc/update/9.3-to-9.4.md
@@ -271,6 +271,16 @@ sudo systemctl daemon-reload
 
 ### 12. Install libs, migrations, etc.
 
+GitLab 9.4 [introduced](https://gitlab.com/gitlab-org/gitlab-ce/issues/24570)
+a dependency on on the `re2` regular expression library. To install this dependency:
+
+```bash
+sudo apt-get install libre2-dev
+```
+
+Ubuntu 14.04 (Trusty Tahr) doesn't have the `libre2-dev` package available, but
+you can [install re2 manually](https://github.com/google/re2/wiki/Install).
+
 ```bash
 cd /home/git/gitlab
 
diff --git a/doc/update/9.4-to-9.5.md b/doc/update/9.4-to-9.5.md
index fc87b2d0f1e..1b5a15589af 100644
--- a/doc/update/9.4-to-9.5.md
+++ b/doc/update/9.4-to-9.5.md
@@ -295,6 +295,10 @@ sudo -u git -H bundle clean
 # Run database migrations
 sudo -u git -H bundle exec rake db:migrate RAILS_ENV=production
 
+# Compile GetText PO files
+
+sudo -u git -H bundle exec rake gettext:compile RAILS_ENV=production
+
 # Update node dependencies and recompile assets
 sudo -u git -H bundle exec rake yarn:install gitlab:assets:clean gitlab:assets:compile RAILS_ENV=production NODE_ENV=production
 
diff --git a/spec/javascripts/fly_out_nav_spec.js b/spec/javascripts/fly_out_nav_spec.js
index ea2a4caffaf..d7b7acaa3f4 100644
--- a/spec/javascripts/fly_out_nav_spec.js
+++ b/spec/javascripts/fly_out_nav_spec.js
@@ -59,7 +59,7 @@ describe('Fly out sidebar navigation', () => {
 
       expect(
         el.querySelector('.sidebar-sub-level-items').style.display,
-      ).toBe('none');
+      ).toBe('');
     });
 
     it('does not hude subitems on mobile', () => {