undefined method `empty?' for nil:NilClass

[localshred]

I ran into an error trying to force a build on a new project I created. I was able to add the project using bin/goldberg add. After adding the project I launched the app with bin/goldberg start 3001. When I click force build on the project, nothing appears to happen (not sure if that is normal behavior), then when I click the project to see its builds, I get the standard Rails "We're sorry but something went wrong" error. Checking production.log yields the following error:

Started GET "/projects/amigo-master" for 172.16.0.70 at 2011-06-02 10:31:03 -0600
  Processing by ProjectsController#show as HTML
  Parameters: {"project_name"=>"amigo-master"}
Rendered projects/show.html.haml within layouts/application (1.8ms)
Completed   in 4ms

ActionView::Template::Error (undefined method `empty?' for nil:NilClass):
    22:       = @project.name
    23:       %em.project_ruby (#{@project.ruby})
    24:       %strong.project_status= "#{build_status(@build)}"
    25:     - unless @build.artefacts.empty?
    26:       %ul
    27:         Build artefacts
    28:         - @build.artefacts.each do |artefact|
  app/views/projects/show.html.haml:25:in `_app_views_projects_show_html_haml__3906049776127963241_30547500_2133775230302929165'

What is the best way to get around this?

[localshred]

After altering that view (- unless @build.artefacts.nil? || @build.artefacts.empty?) I can get in and see the project page, but clicking force build ends up doing nothing. I'm not seeing any errors in the rails log.

[srushti]

Currently, there are two modes of running goldberg.

1. In development mode, the web server starts the builder in a separate thread.
2. In production mode, it just runs the web server. Here, you'll need to run the builder in a separate window by calling bin/goldberg start_poller (using the production environment of course). Our understanding was that someone running it in production will probably start it using apache+passenger or some such set up, where we wouldn't be able to start the poller. I just realised this second mode hasn't been documented in the README, and I'll make sure to add that in.

There seems to be a separate issue where if you go to a project's page before any builds have been created it barfs. I'm fixing that presently.

[localshred]

Excellent, thank you for the quick response! I'll run the poller and see how things go.

[srushti]

Fixed the empty? problem in cc2234.