Abstract
Open source software (OSS) allows developers to study, change, and improve the code free of charge. There are several high-quality software projects which deliver stable and well-documented products. Most OSS forges typically sustain active user and expert communities which in turn provide decent levels of support both with respect to answering user questions as well as to repairing reported software bugs. Code reuse is an intrinsic feature of OSS, and developing a new system by leveraging existing open source components can reduce development effort, and thus it can be beneficial to at least two phases of the software life cycle, i.e., implementation and maintenance. However, to improve software quality, it is essential to develop a system by learning from well-defined, mature projects. In this sense, the ability to find similar projects that facilitate the undergoing development activities is of high importance. In this paper, we address the issue of mining open source software repositories to detect similar projects, which can be eventually reused by developers. We propose CrossSim as a novel approach to model the OSS ecosystem and to compute similarities among software projects. An evaluation on a dataset collected from GitHub shows that our proposed approach outperforms three well-established baselines.
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Notes
SourceForge: https://sourceforge.net/
About GitHub: https://github.com/about
The files pom.xml and with the extension .gradle are related to management of dependencies by means of Maven (https://maven.apache.org/) and Gradle (https://gradle.org/), respectively.
GitHub Rate Limit: https://developer.github.com/v3/rate_limit/
JUnit: http://junit.org/junit5/
For the sake of clarity, in this paper, we give a name for the algorithms that have not been originally named
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Acknowledgements
The research described in this paper has been carried out as part of the CROSSMINER Project, EU Horizon 2020 Research and Innovation Programme, grant agreement No. 732223. We thank our project partners for the help with the user evaluation presented in this paper. Furthermore, we thank the anonymous reviewers for their valuable comments and suggestions that help us improve our paper.
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Appendix
Appendix
1.1 Questionnaire
This is the questionnaire sent to the developers who took part in our user evaluation. We adopted most of the content proposed by CLAN evaluation dataset (2018) and McMillan et al. (2012)
1.2 Materials
We uploaded the materials created from the user evaluation in GitHub for future reference.Footnote 11
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Nguyen, P.T., Di Rocco, J., Rubei, R. et al. An automated approach to assess the similarity of GitHub repositories. Software Qual J 28, 595–631 (2020). https://doi.org/10.1007/s11219-019-09483-0
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DOI: https://doi.org/10.1007/s11219-019-09483-0