Merge branch 'master' into feature/issue-move

* master:
  Fix bug where wrong commit ID was being used in a merge request diff to show old image
  Remove CHANGELOG item that was added during merge resolution
  Improve the "easy WIP & un-WIP from link" feature
  Fix specs
  \#to_branch_name now uses the iid as postfix
  Add label description in tooltip to labels in issue index and sidebar
  Easily (un)mark merge request as WIP using link
  Use specialized system notes when MR is (un)marked as WIP
  another attempt to fix oauth issue
  attempting to fix omniauth problem

Conflicts:
	app/assets/javascripts/issuable_form.js.coffee

3 files changed, 27 insertions, 2 deletions

diff --git a/app/services/merge_requests/base_service.rb b/app/services/merge_requests/base_service.rb
index 7b306a8a531..ac5b58db862 100644
--- a/app/services/merge_requests/base_service.rb
+++ b/app/services/merge_requests/base_service.rb
@@ -5,6 +5,19 @@ module MergeRequests
       SystemNoteService.change_status(merge_request, merge_request.target_project, current_user, merge_request.state, nil)
     end
 
+    def create_title_change_note(issuable, old_title)
+      removed_wip = old_title =~ MergeRequest::WIP_REGEX && !issuable.work_in_progress?
+      added_wip = old_title !~ MergeRequest::WIP_REGEX && issuable.work_in_progress?
+
+      if removed_wip
+        SystemNoteService.remove_merge_request_wip(issuable, issuable.project, current_user)
+      elsif added_wip
+        SystemNoteService.add_merge_request_wip(issuable, issuable.project, current_user)
+      else
+        super
+      end
+    end
+
     def hook_data(merge_request, action)
       hook_data = merge_request.to_hook_data(current_user)
       merge_request_url = Gitlab::UrlBuilder.new(:merge_request).build(merge_request.id)
diff --git a/app/services/merge_requests/build_service.rb b/app/services/merge_requests/build_service.rb
index fa34753c4fd..6e9152e444e 100644
--- a/app/services/merge_requests/build_service.rb
+++ b/app/services/merge_requests/build_service.rb
@@ -51,7 +51,7 @@ module MergeRequests
       # be interpreted as the use wants to close that issue on this project
       # Pattern example: 112-fix-mep-mep
       # Will lead to appending `Closes #112` to the description
-      if match = merge_request.source_branch.match(/\A(\d+)-/)
+      if match = merge_request.source_branch.match(/-(\d+)\z/)
         iid = match[1]
         closes_issue = "Closes ##{iid}"
 
diff --git a/app/services/system_note_service.rb b/app/services/system_note_service.rb
index b2b5c8b83bd..e022a046c48 100644
--- a/app/services/system_note_service.rb
+++ b/app/services/system_note_service.rb
@@ -144,6 +144,18 @@ class SystemNoteService
     create_note(noteable: noteable, project: project, author: author, note: body)
   end
 
+  def self.remove_merge_request_wip(noteable, project, author)
+    body = 'Unmarked this merge request as a Work In Progress'
+
+    create_note(noteable: noteable, project: project, author: author, note: body)
+  end
+
+  def self.add_merge_request_wip(noteable, project, author)
+    body = 'Marked this merge request as a **Work In Progress**'
+
+    create_note(noteable: noteable, project: project, author: author, note: body)
+  end
+
   # Called when the title of a Noteable is changed
   #
   # noteable  - Noteable object that responds to `title`
@@ -210,7 +222,7 @@ class SystemNoteService
   # Called when a branch is created from the 'new branch' button on a issue
   # Example note text:
   #
-  #   "Started branch `201-issue-branch-button`"
+  #   "Started branch `issue-branch-button-201`"
   def self.new_issue_branch(issue, project, author, branch)
     h = Gitlab::Application.routes.url_helpers
     link = h.namespace_project_compare_url(project.namespace, project, from: project.default_branch, to: branch)