Add merge train position message (CE)

This commit adds an informational message under the pipeline block in
the merge request widget that displays the current position of the merge
request on the merge train.

2 files changed, 13 insertions, 1 deletions

diff --git a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline_container.vue b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline_container.vue
index 03a15ba81ed..ba9a4d2a187 100644
--- a/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline_container.vue
+++ b/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_pipeline_container.vue
@@ -1,4 +1,5 @@
 <script>
+import _ from 'underscore';
 import Deployment from './deployment.vue';
 import MrWidgetContainer from './mr_widget_container.vue';
 import MrWidgetPipeline from './mr_widget_pipeline.vue';
@@ -17,6 +18,8 @@ export default {
     Deployment,
     MrWidgetContainer,
     MrWidgetPipeline,
+    MergeTrainInfo: () =>
+      import('ee_component/vue_merge_request_widget/components/merge_train_info.vue'),
   },
   props: {
     mr: {
@@ -58,6 +61,9 @@ export default {
     showVisualReviewAppLink() {
       return Boolean(this.mr.visualReviewFF && this.mr.visualReviewAppAvailable);
     },
+    showMergeTrainInfo() {
+      return _.isNumber(this.mr.mergeTrainIndex);
+    },
   },
 };
 </script>
@@ -83,6 +89,11 @@ export default {
           :visual-review-app-meta="visualReviewAppMeta"
         />
       </div>
+      <merge-train-info
+        v-if="showMergeTrainInfo"
+        class="mr-widget-extension"
+        :merge-train-index="mr.mergeTrainIndex"
+      />
     </template>
   </mr-widget-container>
 </template>
diff --git a/app/assets/stylesheets/pages/merge_requests.scss b/app/assets/stylesheets/pages/merge_requests.scss
index 8cb3fab74e0..3917937f4af 100644
--- a/app/assets/stylesheets/pages/merge_requests.scss
+++ b/app/assets/stylesheets/pages/merge_requests.scss
@@ -904,7 +904,8 @@
   margin-right: -5px;
 }
 
-.deploy-heading {
+.deploy-heading,
+.merge-train-info {
   @include media-breakpoint-up(md) {
     padding: $gl-padding-8 $gl-padding;
   }