SZZ Unleashed

• SZZ Unleashed is an implementation of the SZZ algorithm, i.e. an approach to identify bug-introducing commits, introduced by Śliwerski et al's in "When Do Changes Induce Fixes?", in Proc. of the International Workshop on Mining Software Repositories, May 17, 2005.
• This repository responds to the call for public SZZ implementations by Rodríguez-Pérez, Robles, and González-Barahona. "Reproducibility and Credibility in Empirical Software Engineering: A Case Study Based on a Systematic Literature Review of the use of the SZZ Algorithm", Information and Software Technology, Volume 99, 2018.

Input(s):

• Issue tracker
• Git repository

Main feature(s):

• Finds bug-introducing commits from a set of bug-fixing commits

Output(s):

• Commits.json: all commits that have been blamed to be bug introducing
• Annotations.json: a representation of the graph that is generated by the algorithm in the blaming phase
• Fix_and_bug_introducing_pairs.json: all possible pairs which could lead to a bug introduction and fix

• The only supported issue tracker is Jira (should be easy to extend)
• Only git repositories are supported

Software engineering researchers, tool developers, anyone interested in bug prediction.

Open source software under an MIT license.