A Trustability Metric for Code Search based on Developer Karma

Gysin, Florian S.; Kuhn, Adrian (2010). A Trustability Metric for Code Search based on Developer Karma. In: ICSE Workshop on Search-Driven Development-Users, Infrastructure, Tools and Evaluation, 2010, SUITE '10. (pp. 41-44). New York: Association for Computing Machinery ACM 10.1145/1809175.1809186

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The promise of search-driven development is that developers will save time and resources by reusing external code in their local projects. To efficiently integrate this code, users must be able to trust it, thus trustability of code search results is just as important as their relevance. In this paper, we introduce a trustability metric to help users assess the quality of code search results and therefore ease the cost-benefit analysis they undertake trying to find suitable integration candidates. The proposed trustability metric incorporates both user votes and cross-project activity of developers to calculate a "karma" value for each developer. Through the karma value of all its developers a project is ranked on a trustability scale. We present JBENDER, a proof-of-concept code search engine which implements our trustability metric and we discuss preliminary results from an evaluation of the prototype.

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