Pipelines can be canceled only when there are running builds

CHANGELOG

@@ -14,6 +14,7 @@ v 8.9.0 (unreleased)
   - Fix issues filter when ordering by milestone
   - Todos will display target state if issuable target is 'Closed' or 'Merged'
   - Remove 'main language' feature
+  - Pipelines can be canceled only when there are running builds
   - Projects pending deletion will render a 404 page
   - Measure queue duration between gitlab-workhorse and Rails
   - Make authentication service for Container Registry to be compatible with < Docker 1.11

app/models/ci/commit.rb

@@ -66,6 +66,10 @@ module Ci
       end
     end
 
+    def cancelable?
+      builds.running_or_pending.any?
+    end
+
     def cancel_running
       builds.running_or_pending.each(&:cancel)
     end

app/views/projects/ci/commits/_commit.html.haml

@@ -63,9 +63,9 @@
                   %span #{build.name}
 
       - if can?(current_user, :update_pipeline, @project)
-        - if commit.retryable? && commit.builds.failed.any?
+        - if commit.retryable?
           = link_to retry_namespace_project_pipeline_path(@project.namespace, @project, commit.id), class: 'btn has-tooltip', title: "Retry", method: :post do
             = icon("repeat")
-        - if commit.active?
+        - if commit.cancelable?
           = link_to cancel_namespace_project_pipeline_path(@project.namespace, @project, commit.id), class: 'btn btn-remove has-tooltip', title: "Cancel", method: :post do
             = icon("remove")