open.rb in travis-1.5.3

- old
+ new

@@ -2,10 +2,12 @@
 require 'launchy'
 
 module Travis
   module CLI
     class Open < RepoCommand
+      description "opens a build or job in the browser"
+
       on('-g', '--github', 'Open the corresponding project, compare view or pull request on GitHub')
       on('-p', '--print',  'Print out the URL instead of opening it in a browser')
 
       def run(number = nil)
         url = url_for(number)
@@ -19,9 +21,10 @@
       private
 
         def url_for(number)
           return repo_url unless number
           entity = job(number) || build(number)
+          error "could not find job or build #{repository.slug}##{number}" unless entity
           github ? entity.commit.compare_url : "#{repo_url}/#{entity.class.many}/#{entity.id}"
         end
 
         def repo_url
           "https://#{host}/#{slug}"