X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/10d3f91d4b5619172dd5d8fbf3e8aa863b673e2f..4aee7d57faff02fc6b7b6f750dc22a29e58bb963:/apps/workbench/app/helpers/collections_helper.rb

diff --git a/apps/workbench/app/helpers/collections_helper.rb b/apps/workbench/app/helpers/collections_helper.rb
index 25f2cb53e6..5eb1e8c768 100644
--- a/apps/workbench/app/helpers/collections_helper.rb
+++ b/apps/workbench/app/helpers/collections_helper.rb
@@ -1,3 +1,7 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
 module CollectionsHelper
   def d3ify_links(links)
     links.collect do |x|
@@ -51,7 +55,7 @@ module CollectionsHelper
     f0 = '' if f0 == '.'
     f0 = f0[2..-1] if f0[0..1] == './'
     f0 += '/' if not f0.empty?
-    file_path = "#{f0}#{file[1]}"
+    "#{f0}#{file[1]}"
   end
 
   ##
@@ -60,7 +64,11 @@ module CollectionsHelper
   def preview_allowed_for file_name
     file_type = MIME::Types.type_for(file_name).first
     if file_type.nil?
-      false
+      if file_name.downcase.end_with?('.cwl') # unknown mime type, but we support preview
+        true
+      else
+        false
+      end
     elsif (file_type.raw_media_type == "text") || (file_type.raw_media_type == "image")
       true
     elsif (file_type.raw_media_type == "application") &&