Display "commented" only for commit discussions on merge requests

Add commit prop to NoteableNote component and pass it from
NoteableDiscussion

app/assets/javascripts/notes/components/noteable_discussion.vue

@@ -211,6 +211,16 @@ export default {
 
       return this.line;
     },
+    commit() {
+      if (!this.discussion.for_commit) {
+        return null;
+      }
+
+      return {
+        id: this.discussion.commit_id,
+        url: this.discussion.discussion_path,
+      };
+    },
   },
   watch: {
     isReplying() {
@@ -376,6 +386,7 @@ Please check your network connection and try again.`;
                     :note="componentData(initialDiscussion)"
                     :line="line"
                     :help-page-path="helpPagePath"
+                    :commit="commit"
                     @handleDeleteNote="deleteNoteHandler"
                   >
                     <note-edited-text

app/assets/javascripts/notes/components/noteable_note.vue

@@ -2,6 +2,8 @@
 import $ from 'jquery';
 import { mapGetters, mapActions } from 'vuex';
 import { escape } from 'underscore';
+import { truncateSha } from '~/lib/utils/text_utility';
+import { s__, sprintf } from '~/locale';
 import TimelineEntryItem from '~/vue_shared/components/notes/timeline_entry_item.vue';
 import Flash from '../../flash';
 import userAvatarLink from '../../vue_shared/components/user_avatar/user_avatar_link.vue';
@@ -37,6 +39,11 @@ export default {
       required: false,
       default: '',
     },
+    commit: {
+      type: Object,
+      required: false,
+      default: () => null,
+    },
   },
   data() {
     return {
@@ -73,6 +80,24 @@ export default {
     isTarget() {
       return this.targetNoteHash === this.noteAnchorId;
     },
+    actionText() {
+      if (this.commit) {
+        const { id, url } = this.commit;
+        const linkStart = `<a class="commit-sha monospace" href="${escape(url)}">`;
+        const linkEnd = '</a>';
+        return sprintf(
+          s__('MergeRequests|commented on commit %{linkStart}%{commitId}%{linkEnd}'),
+          {
+            commitId: truncateSha(id),
+            linkStart,
+            linkEnd,
+          },
+          false,
+        );
+      }
+
+      return '<span class="d-none d-sm-inline">&middot;</span>';
+    },
   },
 
   created() {
@@ -200,13 +225,9 @@ export default {
     </div>
     <div class="timeline-content">
       <div class="note-header">
-        <note-header
-          v-once
-          :author="author"
-          :created-at="note.created_at"
-          :note-id="note.id"
-          action-text="commented"
-        />
+        <note-header v-once :author="author" :created-at="note.created_at" :note-id="note.id">
+          <span v-html="actionText"></span>
+        </note-header>
         <note-actions
           :author-id="author.id"
           :note-id="note.id"

changelogs/unreleased/winh-discussion-header-commented.yml

+---
+title: Display "commented" only for commit discussions on merge requests
+merge_request: 23622
+author:
+type: fixed

locale/gitlab.pot

@@ -4123,6 +4123,9 @@ msgstr ""
 msgid "MergeRequests|View replaced file @ %{commitId}"
 msgstr ""
 
+msgid "MergeRequests|commented on commit %{linkStart}%{commitId}%{linkEnd}"
+msgstr ""
+
 msgid "MergeRequests|started a discussion"
 msgstr ""