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LI, Yi

Assistant Professor

School of Computer Science and Engineering (SCSE)
Nanyang Technological University (NTU)

Address: Block N4-02b-64
50 Nanyang Avenue, Singapore 639798
Phone: +65 6790 4287

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Yi Li, Chenguang Zhu, Julia Rubin and Marsha Chechik

IEEE Transactions on Software Engineering, 44(2):182–201

Abstract: Software developers often need to transfer functionality, e.g., a set of commits implementing a new feature or a bug fix, from one branch of a configuration management system to another. That can be a challenging task as the existing configuration management tools lack support for matching high-level, semantic functionality with low-level version histories. The developer thus has to either manually identify the exact set of semantically-related commits implementing the functionality of interest or sequentially port a segment of the change history, “inheriting” additional, unwanted functionality.

In this paper, we tackle this problem by providing automated support for identifying the set of semantically-related commits implementing a particular functionality, which is defined by a set of tests. We formally define the semantic slicing problem, provide an algorithm for identifying a set of commits that constitute a slice, and propose techniques to minimize the produced slice. We then instantiate the overall approach, CSLICER, in a specific implementation for Java projects managed in Git and evaluate its correctness and effectiveness on a set of open-source software repositories. We show that it allows to identify subsets of change histories that maintain the functionality of interest but are substantially smaller than the original ones.

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