class Sprockets::Rails::Helper::AssetNotPrecompiled

def initialize(source)
  msg =
  if using_sprockets4?
    "Asset `#{source}` was not declared to be precompiled in production.\n" +
    "Declare links to your assets in `assets/config/manifest.js`.\n" +
    "Examples:\n" +
    "`//= link ../javascripts/application.js`\n" +
    "`//= link_directory ../javascripts .js`\n" +
    "`//= link_directory ../stylesheets .css`\n" +
    "`//= link_tree ../javascripts .js`\n" +
    "`//= link_tree ../images`\n" +
    "and restart your server"
  else
    "Asset was not declared to be precompiled in production.\n" +
    "Add `Rails.application.config.assets.precompile += " +
    "%w( #{source} )` to `config/initializers/assets.rb` and " +
    "restart your server"
  end
  super(msg)
end