It's Jenkins CI extension which simplifies build step setup for iOS projects. iOS builder allows you to install/update pods in you project (you just put Podfile to the SCM, right?!), specify xcodebuild parameters and (it's, actually, the main advantage of the plugin) to easily attach your private key and mobileprovision profile to the build configuration so they would be used during the build step without any dependence on your project config. It also makes an IPA archive of your app if you wish so all you'd need to do is to publish it wherever you want. This plugin is in beta state now so please be patient.
For now you can download an .hpi file which I've built here. The plugin would be available in Jenkins' repository soon so you'd be able to use Plugin Manager to install/upgrade it.
That plugin could be built using maven. The simplest way to get maven on your machine is to use Homebrew:
$ brew install maven
Once you have maven installed – use these lines in your terminal to grab the sources and build the plugin.
$ git clone git://github.com/0xc010d/iosbuilder-plugin.git
$ cd iosbuilder-plugin
$ mvn package
Once it's built – you'll see iOSBuilder.hpi file in target subfolder which should be used to install that plugin in Jenkins.
Go to http://<jenkins_root_url>/pluginManager/advanced (same as Manage Jenkins -> Manage Plugins -> Advanced), upload iOSBuilder.hpi file in "Upload plugin" section and restart Jenkins.
Now go to your project, add iOS builder as a build step, configure it and run. Isn't it cool?
