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MSR 2019
Sun 26 - Mon 27 May 2019 Montreal, QC, Canada
co-located with ICSE 2019

Maven artifacts are immutable: an artifact that is uploaded on Maven Central cannot be removed nor modified. The only way for developers to upgrade their library is to release a new version. Consequently, Maven Central accumulates all the versions of all the libraries that are published there, and applications that declare a dependency towards a library can pick any version. In this work, we hypothesize that the immutability of Maven artifacts and the ability to choose any version naturally support the emergence of software diversity within Maven Central. We analyze 1,487,956 artifacts that represent all the versions of 73,653 libraries. We observe that more than 30% of libraries have multiple versions that are actively used by latest artifacts. In the case of popular libraries, more than 50% of their versions are used. We also observe that more than 17% of libraries have several versions that are significantly more used than the other versions. Our results indicate that the immutability of artifacts in Maven Central does support a sustained level of diversity among versions of libraries in the repository.

Mon 27 May

msr-2019-Paper-Presentations
09:40 - 10:30: MSR 2019 Paper Presentations - Session III: APIs & Dependencies (Part 2) at Place du Canada
Chair(s): Georgios GousiosTU Delft
msr-2019-Data-Showcase09:40 - 09:46
Talk
Amine Benelallam, Nicolas Harrand, César Soto-ValeroKTH Royal Institute of Technology, Benoit BaudryKTH Royal Institute of Technology, Sweden, Olivier Barais
Pre-print
msr-2019-papers09:46 - 10:01
Full-paper
César Soto-ValeroKTH Royal Institute of Technology, Amine Benelallam, Nicolas Harrand, Olivier Barais, Benoit BaudryKTH Royal Institute of Technology, Sweden
Pre-print
msr-2019-papers10:01 - 10:16
Full-paper
Jens DietrichVictoria University of Wellington, David PearceVictoria University of Wellington, New Zealand, Jacob Stringer, Amjed TahirMassey University, Kelly BlincoeUniversity of Auckland
Pre-print
msr-2019-papers10:16 - 10:31
Full-paper