New issue button was not follows to external tracker if it is selected. fixed #3386

app/helpers/issues_helper.rb

@@ -54,6 +54,18 @@ module IssuesHelper
     end
   end
 
+  def url_for_new_issue
+    return "" if @project.nil?
+
+    if @project.used_default_issues_tracker?
+      url = new_project_issue_path project_id: @project
+    else
+      url = Settings[:issues_tracker][@project.issues_tracker]["new_issue_url"]
+      url.gsub(':project_id', @project.id.to_s)
+        .gsub(':issues_tracker_id', @project.issues_tracker_id.to_s)
+    end
+  end
+
   def url_for_issue(issue_id)
     return "" if @project.nil?
 

app/views/projects/_clone_panel.html.haml

@@ -13,5 +13,5 @@
             = link_to new_project_merge_request_path(@project), title: "New Merge Request", class: "btn-small btn grouped" do
               Merge Request
           - if @project.issues_enabled && can?(current_user, :write_issue, @project)
-            = link_to new_project_issue_path(@project), title: "New Issue", class: "btn-small btn grouped" do
+            = link_to url_for_new_issue, title: "New Issue", class: "btn-small btn grouped" do
               Issue

config/gitlab.yml.example

@@ -46,12 +46,19 @@ production: &base
     #   ##  :project_id        - GitLab project identifier
     #   ##  :issues_tracker_id - Project Name or Id in external issue tracker
     #   project_url: "http://redmine.sample/projects/:issues_tracker_id"
+    #
     #   ## If not nil, links from /#\d/ entities from commit messages will replaced with this
     #   ## Use placeholders:
     #   ##  :project_id        - GitLab project identifier
     #   ##  :issues_tracker_id - Project Name or Id in external issue tracker
     #   ##  :id                - Issue id (from commit messages)
     #   issues_url: "http://redmine.sample/issues/:id"
+    #
+    #   ## If not nil, linkis to creating new issues will be replaced with this
+    #   ## Use placeholders:
+    #   ##  :project_id        - GitLab project identifier
+    #   ##  :issues_tracker_id - Project Name or Id in external issue tracker
+    #   new_issue_url: "http://redmine.sample/projects/:issues_tracker_id/issues/new"
 
   ## Gravatar
   gravatar:
@@ -152,6 +159,7 @@ test:
     redmine:
       project_url: "http://redmine/projects/:issues_tracker_id"
       issues_url: "http://redmine/:project_id/:issues_tracker_id/:id"
+      new_issue_url: "http://redmine/projects/:issues_tracker_id/insues/new"
 
 staging:
   <<: *base

spec/helpers/issues_helper_spec.rb

@@ -76,4 +76,31 @@ describe IssuesHelper do
       url_for_issue(issue.id).should eq ""
     end
   end
+
+  describe :url_for_new_issue do
+    let(:issues_url) { Gitlab.config.issues_tracker.redmine.new_issue_url}
+    let(:ext_expected) do
+      issues_url.gsub(':project_id', ext_project.id.to_s)
+        .gsub(':issues_tracker_id', ext_project.issues_tracker_id.to_s)
+    end
+    let(:int_expected) { new_project_issue_path(project) }
+
+    it "should return internal path if used internal tracker" do
+      @project = project
+      url_for_new_issue.should match(int_expected)
+    end
+
+    it "should return path to external tracker" do
+      @project = ext_project
+
+      url_for_new_issue.should match(ext_expected)
+    end
+
+    it "should return empty string if project nil" do
+      @project = nil
+
+      url_for_new_issue.should eq ""
+    end
+  end
+
 end