Rails Javascript/CSS Path outside of a controller

gistfile1.rb

# Small snippet to get the paths of linked files for an asset. For use during development only.

# AssetPaths has built in support to resolve paths
ap = ActionView::Helpers::AssetTagHelper::AssetPaths.new(Rails.configuration.action_controller)
# Find the asset directly on the sprockets environment
a = Rails.application.assets.find_asset("crm")
# Compute the public facing paths
a.to_a.map{|path| ap.compute_public_path(path.logical_path, 'javascripts') }