Cipier is FreeBSD Continuous Integration Framework for GitHub.
How it works?
# git clone https://github.com/user/project
# cd project/
# vim Makefile.cipier 
# git add Makefile.cipier
# git commit Makefile.cipier -m "Test build with cipier"
# git push origin master
 - use this tutorial as a reference.
 - use this as an example.
FreeBSD Ports Status:
List of FreeBSD Ports tested with Cipier and their Makefiles.
Let me know if you want to give a try.
Contacts: Nikola Kolev, firstname.lastname@example.org