FIX: hides upload link on mobile

app/assets/javascripts/discourse/components/composer-editor.js.es6

@@ -13,7 +13,6 @@ import { tinyAvatar,
          displayErrorForUpload,
          getUploadMarkdown,
          validateUploadedFiles,
-         authorizesOneOrMoreExtensions,
          authorizesOneOrMoreImageExtensions,
          formatUsername,
          clipboardData
@@ -670,7 +669,7 @@ export default Ember.Component.extend({
         unshift: true
       });
 
-      if (authorizesOneOrMoreExtensions()) {
+      if (this.get('allowUpload')) {
         toolbar.addButton({
           id: 'upload',
           group: 'insertions',

app/assets/javascripts/discourse/controllers/composer.js.es6

@@ -5,7 +5,7 @@ import Composer from 'discourse/models/composer';
 import { default as computed, observes, on } from 'ember-addons/ember-computed-decorators';
 import InputValidation from 'discourse/models/input-validation';
 import { getOwner } from 'discourse-common/lib/get-owner';
-import { escapeExpression } from 'discourse/lib/utilities';
+import { escapeExpression, authorizesOneOrMoreExtensions } from 'discourse/lib/utilities';
 import { emojiUnescape } from 'discourse/lib/text';
 import { shortDate } from 'discourse/lib/formatter';
 
@@ -70,6 +70,7 @@ export default Ember.Controller.extend({
   scopedCategoryId: null,
   lastValidatedAt: null,
   isUploading: false,
+  allowUpload: false,
   topic: null,
   linkLookup: null,
   showPreview: true,
@@ -223,6 +224,11 @@ export default Ember.Controller.extend({
     return emojiUnescape(escapeExpression(topic.get('title')));
   },
 
+  @computed
+  allowUpload() {
+    return authorizesOneOrMoreExtensions();
+  },
+
   actions: {
     cancelUpload() {
       this.set('model.uploadCancelled', true);

app/assets/javascripts/discourse/templates/composer.hbs

@@ -85,6 +85,7 @@
                             popupMenuOptions=popupMenuOptions
                             draftStatus=model.draftStatus
                             isUploading=isUploading
+                            allowUpload=allowUpload
                             isCancellable=isCancellable
                             uploadProgress=uploadProgress
                             groupsMentioned="groupsMentioned"
@@ -131,7 +132,9 @@
 
             <div class="composer-bottom-right">
               {{#if site.mobileView}}
-                <a class="mobile-file-upload {{if isUploading 'hidden'}}">{{i18n 'upload'}}</a>
+                {{#if allowUpload}}
+                  <a class="mobile-file-upload {{if isUploading 'hidden'}}">{{i18n 'upload'}}</a>
+                {{/if}}
 
                 {{#if showPreview}}
                   {{d-button action='togglePreview' class='hide-preview' label='composer.hide_preview'}}