title: rake assets:precompile aborting, can't push to heroku
body: <p>I'm using Enki blogging gem, it works locally, trying to prepare to push to heroku (never had a problem before). I tried to precompile and it did this</p>
  
  <pre><code>/Users/me/.rvm/rubies/ruby-1.9.3-rc1/bin/ruby /Users/me/.rvm/gems/ruby-1.9.3-rc1@ruby193/bin/rake assets:precompile:all RAILS_ENV=production RAILS_GROUPS=assets
  rake aborted!
  cannot load such file -- uglifier
    (in /Users/me/Sites/bayani/app/assets/javascripts/admin.js)
  </code></pre>
  
  <p>I've never had trouble pushing an Enki blog to Heroku before and, although I don't know where uglifier is, I recall having seen it in other Enki blogs I've pushed, so I don't know why it's creating problems now. </p>
  
  <p>When I pushed to Heroku and it aborted the precompile as well</p>
  
  <pre><code>Preparing app for Rails asset pipeline
         Running: rake assets:precompile
         rake aborted!
         no such file to load -- uglifier
         (in /tmp/build_5tbsi7k7ddhk/app/assets/javascripts/admin.js)
         Tasks: TOP =&gt; assets:precompile:primary
         (See full trace by running task with --trace)
         Precompiling assets failed, enabling runtime asset compilation
         Injecting rails31_enable_runtime_asset_compilation
         Please see this article for troubleshooting help:
         http://devcenter.heroku.com/articles/rails31_heroku_cedar#troubleshooting
  </code></pre>
  
  <p>After reading the troubleshooting article at the link it provided, I put this in application.rb</p>
  
  <pre><code>config.assets.initialize_on_precompile = false
  </code></pre>
  
  <p>but I'm still having the same problem</p>
  
  <p>This is admin.js. It's just a manifest file. this is the link to enki <a href="https://github.com/xaviershay/enki" rel="nofollow">https://github.com/xaviershay/enki</a></p>
  
  <pre><code>// This is a manifest file that'll be compiled into application.js, which will include all the files
  // listed below.
  //
  // Any JavaScript/Coffee file within this directory, lib/assets/javascripts, vendor/assets/javascripts,
  // or vendor/assets/javascripts of plugins, if any, can be referenced here using a relative path.
  //
  // It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
  // the compiled file.
  //
  // WARNING: THE FIRST BLANK LINE MARKS THE END OF WHAT'S TO BE PROCESSED, ANY BLANK LINE SHOULD
  // GO AFTER THE REQUIRES BELOW.
  //
  //= require jquery
  //= require jquery_ujs
  //= require jquery.livequery
  //= require jquery.form
  //= require jquery.easing.1.3
  //= require humanmsg
  //= require_tree ./admin
  </code></pre>