Wicked PDF with Webpacker does not work when sprockets is not loaded (Rails 6)

[EdisonArango]

Issue description

When I have configured webpacker and disabled sprockets in my project with Rails 6 and I use the assets helpers for webpack in the layout:

<%= wicked_pdf_stylesheet_pack_tag "application" %>
<%= wicked_pdf_javascript_pack_tag "application" %>

Then I get the following error:

undefined method `assets' for #<Rails::Application::Configuration:>
Did you mean?  asset_host

This only happens in production or when the webpack dev server is not running.

The problem seems to happen because the helpers check if the assets are compiled by checking:

config.assets.compile

But config.assets is not defined when sprockets is disabled.

System specifications

wicked_pdf gem version: 1.4.0

wkhtmltopdf version: 0.12.4

platform/distribution: Heroku

[EdisonArango]

This is my workaround while this is solved.

Add this to config/application.rb

AssetsConfig = Struct.new(:enabled, :compile, keyword_init: true)
config.assets = AssetsConfig.new(enabled: false, compile: false)