Fix broken link for latest deployment

Updates changelog with MR ID

app/helpers/environment_helper.rb

@@ -20,6 +20,12 @@ module EnvironmentHelper
     link_to "##{deployment.iid}", [deployment.project.namespace.becomes(Namespace), deployment.project, deployment.deployable]
   end
 
+  def last_deployment_link(deployment, link_text)
+    return unless deployment
+
+    link_to link_text, [deployment.project.namespace.becomes(Namespace), deployment.project, deployment.deployable]
+  end
+
   def last_deployment_link_for_environment_build(project, build)
     environment = environment_for_build(project, build)
     return unless environment

app/views/projects/builds/show.html.haml

@@ -46,8 +46,7 @@
           - else
             This build is creating a deployment to #{environment_link_for_build(@build.project, @build)}
             - if environment.try(:last_deployment)
-              and will overwrite the
-              = link_to 'latest deployment', deployment_link(environment.last_deployment)
+              and will overwrite the #{last_deployment_link(environment.last_deployment, 'latest deployment')}
 
     .prepend-top-default
       - if @build.erased?

changelogs/unreleased/25136-last-deployment-link.yml

@@ -0,0 +1,4 @@
+---
+title: Fix Latest deployment link is broken
+merge_request: 7839
+author:

spec/features/projects/builds_spec.rb

@@ -227,6 +227,28 @@ feature 'Builds', :feature do
         expect(page).to have_selector('.js-build-value', text: 'TRIGGER_VALUE_1')
       end
     end
+
+    context "Build starts environment" do
+      context "Build is successfull and has deployment" do
+        it "shows a link for the build" do
+          -# link to environment.name
+          expect(page).to have_link()
+        end
+      end
+
+      context "Build is complete and not successfull" do
+        it "shows a link for the build" do
+          -# link to environment.name
+          expect(page).to have_link()
+        end
+      end
+
+      context "Build creates a new deployment" do
+        it "shows a link to lastest deployment" do
+          expect(page).to have_link("latest deployment")
+        end
+      end
+    end
   end
 
   describe "POST /:project/builds/:id/cancel" do