How to set Xcode Bot to run "on commit" for all branches of remote repository?

There is also https://github.com/modcloth-labs/XBotBuilder developed by the same creators of the tool @jeremy-fox. It will create a bot per Pull Request, and re-run the bot for every addition in the PR.

It seems to be in early stages and without documentation but the code seems to be well organized so wouldn't be hard to get it to work or change it's behavior to do what you want.

For the moment we use a tool called Buildasaur (https://github.com/czechboy0/Buildasaur) to improve our CI-workflow. It's written in swift and helps to build/run/ delete bots automatically for one github repository, for example whenever a pullrequest was created or newer commits were pushed to the pullrequest. Actually it works fine on our Xcode Server 6.3. Unfortunately it works for just one repository at the same time. :-( We also hope, that Apple will implement such features soon.

This is not currently possible with Xcode Bots (current versions are Xcode Server 4.0.3 & Xcode 6.2). A Bot will only track the specific branch form which it was created.

This was possible in the past on Xcode Server 3 and Xcode 5 using https://github.com/modcloth-labs/github-xcode-bot-builder but this project hasn't been updated to work with the latest version of Xcode Server and Xcode.

I'm also really hoping Apple introduces this feature soon, it would be great to be able to have a single bot monitoring a repo for new Pull Requests and when found run an integration against that PR. For now though, it's just not possible.

Update 3/19/2015: As @Gus reports in another answer, there is a new Mac OS X based project that can help with ad hoc bot creation for feature branches/PR's called XBotBuilder - https://github.com/modcloth-labs/XBotBuilder. It should be worth noting that currently, this project only works with one github repo. So, if you have more than one repo you'd like to monitor for PR's, this is still not currently possible unless you have multiple machines each running a different instance of XBotBuilder and targeting a different repo.