Display a symlink icon for repository file symlinks

app/assets/javascripts/vue_shared/components/file_icon.vue

 <script>
 import { GlLoadingIcon, GlIcon } from '@gitlab/ui';
 import getIconForFile from './file_icon/file_icon_map';
+import { FILE_SYMLINK_MODE } from '../constants';
 
 /* This is a re-usable vue component for rendering a svg sprite
     icon
@@ -25,9 +26,9 @@ export default {
       required: true,
     },
     fileMode: {
-      type: Number,
+      type: String,
       required: false,
-      default: -1
+      default: '',
     },
 
     folder: {
@@ -65,8 +66,12 @@ export default {
     },
   },
   computed: {
+    isSymlink() {
+      return this.fileMode === FILE_SYMLINK_MODE;
+    },
     spriteHref() {
       const iconName = this.submodule ? 'folder-git' : getIconForFile(this.fileName) || 'file';
+
       return `${gon.sprite_file_icons}#${iconName}`;
     },
     folderIconName() {
@@ -80,13 +85,11 @@ export default {
 </script>
 <template>
   <span>
-    <svg v-if="!loading && !folder" :class="[iconSizeClass, cssClasses]">
-      <use v-bind="{ 'xlink:href': spriteHref }" /></svg
-    ><gl-icon
-      v-if="!loading && folder"
-      :name="folderIconName"
-      :size="size"
-      class="folder-icon"
-    /><gl-loading-icon v-if="loading" :inline="true" />
+    <gl-loading-icon v-if="loading" :inline="true" />
+    <gl-icon v-else-if="isSymlink" name="symlink" :size="size" />
+    <svg v-else-if="!folder" :class="[iconSizeClass, cssClasses]">
+      <use v-bind="{ 'xlink:href': spriteHref }" />
+    </svg>
+    <gl-icon v-else :name="folderIconName" :size="size" class="folder-icon" />
   </span>
 </template>