Rail 3.1 CI setup with Jenkins, Test Unit & SimpleCov on OS X Lion.
I recently had to setup a build server for some rails work I’m doing. Still wanting to support my other projects I setup Jenkins. I ran into several issues.
Running Jenkins as a hidden user
First I noticed that jenkins was running as the “daemon” user, this obviously wasn’t going to work for github and rvm needs. So I did some googling and had some guides to get Jenkins running as a specific user. I did the following (sourced from http://colonelpanic.net/2011/06/jenkins-on-mac-os-x-git-w-ssh-public-key/ ).
sudo dscl . create /Users/jenkins sudo dscl . create /Users/jenkins PrimaryGroupID 1 sudo dscl . create /Users/jenkins UniqueID 300 sudo dscl . create /Users/jenkins UserShell /bin/bash sudo dscl . passwd /Users/jenkins $PASSWORD sudo dscl . create /Users/jenkins home /Users/Shared/Jenkins/Home/
Note: That’s really $PASSWORD up above. This gives you a prompt to enter that password. Next you’ll need to stop the Jenkins service and edit the plist and start the service back up.
sudo launchctl unload -w /Library/LaunchDaemons/org.jenkins-ci.plist sudo vim /Library/LaunchDaemons/org.jenkins-ci.plist sudo launchctl load -w /Library/LaunchDaemons/org.jenkins-ci.plist
You’re plist file should end up like this.
Now my next issue was despite what I’d read elsewhere I was unable to get Jenkins to use the default ruby provided by RVM. So I just pasted the commands that I would run anyway in the “Execute Shell” build step.
Getting Jenkins to see tests
I’ve been using Test:Unit/Minitest lately just to keep more consistent with my day to day work. However I haven’t found a way to get my tests to show when using the “Execute Shell” task. I found a little gem called ci_reporter that exports to the standard junit format, unfortunately it doesn’t work with minitest yet. That’s ok I haven’t done anything that Test:Unit doesn’t support so far so I added the the following to my Gemfile (note the part about unit-test 2.0):
group :development, :test do gem 'ci_reporter', '1.6.3' gem 'test-unit', '~> 2.0.0' # Pretty printed test output gem 'turn', :require => false end
Running “rake ci:setup:testunit test” should give you a bunch of xml files in tests/reports. Now we need to tell Jenkins where to find those reports so add a post build action to pick them up as junit reports.
This was pretty easy.
- Install Jenkins plugin for RCov (it’s in the plugin list in the admin section).
- add simplecov and semiplecov-rcov to your Gemfile.
- add the following 4 lines to the TOP of your tests/test_helper.rb file:
require 'simplecov' require 'simplecov-rcov' SimpleCov.formatter = SimpleCov::Formatter::RcovFormatter SimpleCov.start 'rails'
This took a fair amount of time, but the end result was quite satisfying. I now have CI with tests, tests coverage, RVM to target different versions of Ruby and bundler to make sure my Gem environment is sane.