Sinatra app with sprockets not working on Heroku - ruby

Question

I have a little Sinatra app including this module:
module Sprockets
module Helpers
def asset_path(source)
"/assets/#{Environment.instance.find_asset(source).digest_path}"
end
def sprockets
Environment.instance.call(env)
end
end
class << self
def precompile
dir = 'public/assets'
FileUtils.rm_rf(dir, secure: true)
::Sprockets::StaticCompiler.new(Environment.instance, 'public/assets', [/\.(png|jpg)$/, /^(application|ie)\.(css|js)$/]).compile
end
end
class Environment < ::Sprockets::Environment
include Singleton
def initialize
super
%w[app lib vendor].each do |dir|
%w[images javascripts stylesheets].each do |type|
path = File.join(root, dir, 'assets', type)
append_path(path) if File.exist?(path)
end
end
js_compressor = Uglifier.new
css_compressor = YUI::CssCompressor.new
context_class.instance_eval do
include Helpers
end
end
end
end
and with following route defined:
get('/assets/*') do
sprockets # Defined in the module above
end
Everything works just great, assets are loaded and displayed properly on my local machine using pow. But on Heroku no single asset is loaded, the server just returns 404 for every asset file.

Answer 1

Simplified the module and now it works! Weird...
class Assets < Sprockets::Environment
class << self
def instance(root = nil)
#instance ||= new(root)
end
end
def initialize(root)
super
%w[app lib vendor].each do |dir|
%w[images javascripts stylesheets].each do |type|
path = File.join(root, dir, 'assets', type)
self.append_path(path) if File.exist?(path)
end
end
self.css_compressor = YUI::CssCompressor.new
self.js_compressor = Uglifier.new
context_class.instance_eval do
include Helpers
end
end
def precompile
dir = 'public/assets'
FileUtils.rm_rf(dir, secure: true)
Sprockets::StaticCompiler.new(self, 'public/assets', ['*']).compile
end
module Helpers
def asset_path(source)
"/assets/#{Assets.instance.find_asset(source).digest_path}"
end
end
end