maintainer a web-dashboard for R package maintainers

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1 maintainer a web-dashboard for R package maintainers Maëlick Claes COMPLEXYS Research Institute University of Mons, Belgium RIMEL 2nd December 2015

2 R ecosystem Statistical environment Multiple package repositories Repository # packages Since Role CRAN Distribution Distribution R-Forge SVN development Distribution Git development Distribution with devtools But other smaller repositories: Bioconductor, RForge, Omegahat, etc Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

Distribution Git development Distribution with devtools But other smaller repositories:

3 Empirical results On CRAN Developers must fix errors introduced by backward incompatible changes! Study of inter-package code duplication > 100k LOC of Type-1 function clones in CRAN Most cloned functions were copied from a private functions 1/3 could have been avoided by using a dependency Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

Study of inter-package code duplication > 100k LOC of Type-1 function clones in CRAN Most

4 R package repositories github cran r-forge Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

5 Inter-repository dependencies CRAN RForge Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

6 R package developers report It is more and more of a pain if the package I m depending on breaks. If it is just something I was doing for fun, it s not that big of a deal. But if it means I have to rewrite/recheck/rerelease my R package than that is a much bigger headache. [...] the risk of things breaking at some point due to the fact that a version of a dependency has changed without you knowing about it is immense. That actually cost us weeks and months in a couple of professional projects I was part of. Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

But if it means I have to rewrite/recheck/rerelease my R package than that is a much bigger headache. [.

7 This is potentially worse on GitHub CRAN packages required by GitHub are the ones more prone to be updated The lack of version constraints forces developers to react to all backward-incompatible changes, even when their package is stable 24% GitHub packages are configured for Travis-CI not enough to detect backward-incompatible updates. Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

even when their package is stable 24% GitHub packages are configured for Travis-CI not enough to detect

8 maintainer Dashboard to help package maintainers Information dependencies version history package namespace and conflicts type-1 function clones Screencast at Updated to include GitHub packages Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

Screencast at https://www.youtube.com/watch?

9 Future work Global views to detect packages with a particular/extreme behavior Static code analysis Call graph Dependency constraints inference SATToSE 2015 Hackaton: coding style Tool distribution Data? Online version? Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

SATToSE 2015 Hackaton: coding style Tool distribution Data? Online version?

10 Publications IEEE book chapter to be published in 2016 Maelick Claes et al. A Historical Analysis of Debian Package Incompatibilities. Conf. Mining Software Repositories (MSR). IEEE Press, 2015, pp Maëlick Claes, Tom Mens, and Philippe Grosjean. On the maintainability of CRAN packages. In: 2014 Software Evolution Week - IEEE Conference on Software Maintenance, Reengineering, and Reverse Engineering, CSMR-WCRE 2014, Antwerp, Belgium, February 3-6, , pp In: Int l Maëlick Claes, Tom Mens, and Philippe Grosjean. maintainer: A web-based dashboard for maintainers of CRAN packages. In: Int l Conf. Software Maintenance, Reengineering, and Reverse Engineering (ICSME). 2014, pp Maëlick Claes et al. An empirical study of identical function clones in CRAN.. In: Int l Workshop on Software Clones (IWSC). 2015, pp Alexandre Decan et al. On the Development and Distribution of R Packages: An Empirical Analysis of the R Ecosystem. In: European Conf. on Software Architecture Workshops (ECSAW). ACM, 2015 Maëlick Claes maintainer a web-dashboard for R package maintainers RIMEL / 10

In: 2014 Software Evolution Week - IEEE Conference on Software Maintenance, Reengineering, and Reverse Engineering, CSMR-WCRE 2014, Antwerp, Belgium, February 3-6, 2014. 2014, pp.

Co-evolving Code-Related and Database-Related Changes in a Data-Intensive Software System

Co-evolving Code-Related and Database-Related Changes in a Data-Intensive Software System Mathieu Goeminne, Alexandre Decan, Tom Mens Département Informatique, Université de Mons 7000 Mons, Belgique firstname.lastname@umons.ac.be