No such file or directory @ rb_sysopen in attachment_patch.rb:102:in `asset_link'

[jcatrysse]

Hello Dr. Wenzel,

I've recently set up the Redmine More Previews plugin on a fresh Redmine 5 installation. However, I've encountered an issue when attempting to preview .eml files. An error is thrown, suggesting an issue with an unknown filename.

Upon investigation, I pinpointed the cause to the asset_link method, where Marcel::MimeType isn't receiving the complete pathname for the asset.

Below is a patch that resolved the issue on my end:

Index: lib/redmine_more_previews/patches/attachment_patch.rb
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/lib/redmine_more_previews/patches/attachment_patch.rb b/lib/redmine_more_previews/patches/attachment_patch.rb
--- a/lib/redmine_more_previews/patches/attachment_patch.rb	(revision f5e54c9c2fd469035f8262b9a9a3a8f1b93565dc)
+++ b/lib/redmine_more_previews/patches/attachment_patch.rb	(revision e2785c2668c41a73b62325945f89a2dfb79824ac)
@@ -97,9 +97,9 @@
             _link = Rails.application.routes.url_helpers.more_asset_path(
               self, basename, extname[1..-1]
             )
-            
+
             ApplicationController.helpers.link_to( asset, _link,
-             :class => "icon icon-file #{Marcel::MimeType.for(Pathname.new(asset), name: File.basename(asset))&.tr('/', '-')}",
+             :class => "icon icon-file #{Marcel::MimeType.for(Pathname.new(File.join(preview_storagepath, 'preview.html', asset)), name: File.basename(asset))&.tr('/', '-')}",
              :style => "padding-top:2px;padding-bottom:2px;"
             )
           end #def