Allow link_to_label to take an optional type arg

You can set type: :merge_request to create a link to merge request
lists instead of issues list. Accept both Symbol & String as type
argument for the link_to_label helper

CHANGELOG

@@ -13,6 +13,7 @@ v 8.5.0 (unreleased)
     set it up
   - Fix diff comments loaded by AJAX to load comment with diff in discussion tab
   - Whitelist raw "abbr" elements when parsing Markdown (Benedict Etzel)
+  - Fix label links for a merge request pointing to issues list
   - Don't vendor minified JS
   - Display 404 error on group not found
   - Track project import failure

app/helpers/labels_helper.rb

@@ -7,6 +7,8 @@ module LabelsHelper
   # project - Project object which will be used as the context for the label's
   #           link. If omitted, defaults to `@project`, or the label's own
   #           project.
+  # type    - The type of item the link will point to (:issue or
+  #           :merge_request). If omitted, defaults to :issue.
   # block   - An optional block that will be passed to `link_to`, forming the
   #           body of the link element. If omitted, defaults to
   #           `render_colored_label`.
@@ -23,13 +25,18 @@ module LabelsHelper
   #   # Force the generated link to use a provided project
   #   link_to_label(label, project: Project.last)
   #
+  #   # Force the generated link to point to merge requests instead of issues
+  #   link_to_label(label, type: :merge_request)
+  #
   #   # Customize link body with a block
   #   link_to_label(label) { "My Custom Label Text" }
   #
   # Returns a String
-  def link_to_label(label, project: nil, &block)
+  def link_to_label(label, project: nil, type: :issue, &block)
     project ||= @project || label.project
-    link = namespace_project_issues_path(project.namespace, project,
+    link = send("namespace_project_#{type.to_s.pluralize}_path",
+                project.namespace,
+                project,
                 label_name: label.name)
 
     if block_given?

app/views/projects/merge_requests/_merge_request.html.haml

@@ -53,7 +53,7 @@
     - if merge_request.labels.any?
        
       - merge_request.labels.each do |label|
-        = link_to_label(label, project: merge_request.project)
+        = link_to_label(label, project: merge_request.project, type: 'merge_request')
     - if merge_request.tasks?
        
       %span.task-status

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

@@ -90,7 +90,7 @@
           .value.issuable-show-labels
             - if issuable.labels.any?
               - issuable.labels.each do |label|
-                = link_to_label(label)
+                = link_to_label(label, type: issuable.to_ability_name)
             - else
               .light None
           .selectbox

spec/helpers/labels_helper_spec.rb

@@ -11,34 +11,31 @@ describe LabelsHelper do
       end
 
       it 'uses the instance variable' do
-        expect(label).not_to receive(:project)
-        link_to_label(label)
+        expect(link_to_label(label)).to match %r{<a href="/#{@project.to_reference}/issues\?label_name=#{label.name}">.*</a>}
       end
     end
 
     context 'without @project set' do
       it "uses the label's project" do
-        expect(label).to receive(:project).and_return(project)
-        link_to_label(label)
+        expect(link_to_label(label)).to match %r{<a href="/#{label.project.to_reference}/issues\?label_name=#{label.name}">.*</a>}
       end
     end
 
-    context 'with a named project argument' do
-      it 'uses the provided project' do
-        arg = double('project')
-        expect(arg).to receive(:namespace).and_return('foo')
-        expect(arg).to receive(:to_param).and_return('foo')
+    context 'with a project argument' do
+      let(:another_project) { double('project', namespace: 'foo3', to_param: 'bar3') }
 
-        link_to_label(label, project: arg)
+      it 'links to merge requests page' do
+        expect(link_to_label(label, project: another_project)).to match %r{<a href="/foo3/bar3/issues\?label_name=#{label.name}">.*</a>}
+      end
     end
 
-      it 'takes precedence over other types' do
-        @project = project
-        expect(@project).not_to receive(:namespace)
-        expect(label).not_to receive(:project)
-
-        arg = double('project', namespace: 'foo', to_param: 'foo')
-        link_to_label(label, project: arg)
+    context 'with a type argument' do
+      ['issue', :issue, 'merge_request', :merge_request].each do |type|
+        context "set to #{type}" do
+          it 'links to correct page' do
+            expect(link_to_label(label, type: type)).to match %r{<a href="/#{label.project.to_reference}/#{type.to_s.pluralize}\?label_name=#{label.name}">.*</a>}
+          end
+        end
       end
     end