%0 Conference Paper %B Proceedings of the 5th International Workshop on Emerging Trends in Software Metrics - WETSoM 2014 %D 2014 %T "May the fork be with you": novel metrics to analyze collaboration on GitHub %A Marco Biazzini %A Benoit Baudry %Y Counsell, Steve %Y Marchesi, Michele L. %Y Visaggio, Aaron %Y Zhang, Hongyu %Y Venkatasubramanyam, Radhika %K flossmole %K github %X Multi–repository software projects are becoming more and more popular, thanks to web–based facilities such as GitHub. Code and process metrics generally assume a single repository must be analyzed, in order to measure the characteristics of a codebase. Thus they are not apt to measure how much relevant information is hosted in multiple repositories contributing to the same codebase. Nor can they feature the characteristics of such a distributed development process. We present a set of novel metrics, based on an original classification of commits, conceived to capture some interesting aspects of a multi–repository development process. We also describe an efficient way to build a data structure that allows to compute these metrics on a set of Git repositories. Interesting outcomes, obtained by applying our metrics on a large sample of projects hosted on GitHub, show the usefulness of our contribution. %B Proceedings of the 5th International Workshop on Emerging Trends in Software Metrics - WETSoM 2014 %I ACM Press %C New York, New York, USA %P 37 - 43 %@ 9781450328548 %U http://marbiaz.github.io/docs/Biazzini14b.pdf %! WETSoM 2014 %R 10.1145/2593868.2593875