Fix links to issues if instance is using relative urls.

app/models/project_services/gitlab_issue_tracker_service.rb

@@ -27,14 +27,20 @@ class GitlabIssueTrackerService < IssueTrackerService
   end
   def project_url
-    project_issues_path(project)
+    "#{gitlab_url}#{project_issues_path(project)}"
   end
   def new_issue_url
-    new_project_issue_path project_id: project
+    "#{gitlab_url}#{new_project_issue_path(project_id: project)}"
   end
   def issue_url(iid)
-    "#{Gitlab.config.gitlab.url}#{project_issue_path(project_id: project, id: iid)}"
+    "#{gitlab_url}#{project_issue_path(project_id: project, id: iid)}"
+  end
+
+  private
+
+  def gitlab_url
+    Gitlab.config.gitlab.relative_url_root.chomp("/") if Gitlab.config.gitlab.relative_url_root
   end
 end

spec/helpers/gitlab_markdown_helper_spec.rb

@@ -474,7 +474,7 @@ describe GitlabMarkdownHelper do
       # First issue link
       expect(groups[1]).
-        to match(/href="#{project_issue_url(project, issues[0])}"/)
+        to match(/href="#{project_issue_path(project, issues[0])}"/)
       expect(groups[1]).to match(/##{issues[0].iid}$/)
       # Internal commit link
@@ -483,7 +483,7 @@ describe GitlabMarkdownHelper do
       # Second issue link
       expect(groups[3]).
-        to match(/href="#{project_issue_url(project, issues[1])}"/)
+        to match(/href="#{project_issue_path(project, issues[1])}"/)
       expect(groups[3]).to match(/##{issues[1].iid}$/)
       # Trailing commit link
@@ -611,7 +611,7 @@ describe GitlabMarkdownHelper do
     end
     it "should generate absolute urls for refs" do
-      expect(markdown("##{issue.iid}")).to include(project_issue_url(project, issue))
+      expect(markdown("##{issue.iid}")).to include(project_issue_path(project, issue))
     end
     it "should generate absolute urls for emoji" do

spec/models/project_services/gitlab_issue_tracker_service_spec.rb

+# == Schema Information
+#
+# Table name: services
+#
+#  id         :integer          not null, primary key
+#  type       :string(255)
+#  title      :string(255)
+#  project_id :integer
+#  created_at :datetime
+#  updated_at :datetime
+#  active     :boolean          default(FALSE), not null
+#  properties :text
+#  template   :boolean          default(FALSE)
+#
+require 'spec_helper'
+
+describe GitlabIssueTrackerService do
+  describe "Associations" do
+    it { is_expected.to belong_to :project }
+    it { is_expected.to have_one :service_hook }
+  end
+
+
+  describe 'project and issue urls' do
+    let(:project) { create(:project) }
+
+    context 'with absolute urls' do
+      before do
+        @service = project.create_gitlab_issue_tracker_service(active: true)
+      end
+
+      after do
+        @service.destroy!
+      end
+
+      it 'should give the correct path' do
+        expect(@service.project_url).to eq("/#{project.path_with_namespace}/issues")
+        expect(@service.new_issue_url).to eq("/#{project.path_with_namespace}/issues/new")
+        expect(@service.issue_url(432)).to eq("/#{project.path_with_namespace}/issues/432")
+      end
+    end
+
+    context 'with enabled relative urls' do
+      before do
+        Settings.gitlab.stub(:relative_url_root).and_return("/gitlab/root")
+        @service = project.create_gitlab_issue_tracker_service(active: true)
+      end
+
+      after do
+        @service.destroy!
+      end
+
+      it 'should give the correct path' do
+        expect(@service.project_url).to eq("/gitlab/root/#{project.path_with_namespace}/issues")
+        expect(@service.new_issue_url).to eq("/gitlab/root/#{project.path_with_namespace}/issues/new")
+        expect(@service.issue_url(432)).to eq("/gitlab/root/#{project.path_with_namespace}/issues/432")
+      end
+    end
+  end
+end