@conference {Robles:2014:EDE:2597073.2597107, title = {Estimating Development Effort in Free/Open Source Software Projects by Mining Software Repositories: A Case Study of OpenStack}, booktitle = {Proceedings of the 11th Working Conference on Mining Software Repositories}, series = {MSR 2014}, year = {2014}, pages = {222{\textendash}231}, publisher = {ACM}, organization = {ACM}, address = {New York, NY, USA}, abstract = {Because of the distributed and collaborative nature of free / open source software (FOSS) projects, the development effort invested in a project is usually unknown, even after the software has been released. However, this information is becoming of major interest, especially ---but not only--- because of the growth in the number of companies for which FOSS has become relevant for their business strategy. In this paper we present a novel approach to estimate effort by considering data from source code management repositories. We apply our model to the OpenStack project, a FOSS project with more than 1,000 authors, in which several tens of companies cooperate. Based on data from its repositories and together with the input from a survey answered by more than 100 developers, we show that the model offers a simple, but sound way of obtaining software development estimations with bounded margins of error. }, keywords = {effort estimation, free software, mining software repositories, open source, openstack}, isbn = {978-1-4503-2863-0}, doi = {10.1145/2597073.2597107}, url = {http://doi.acm.org/10.1145/2597073.2597107}, attachments = {https://flosshub.org/sites/flosshub.org/files/robles_0.pdf}, author = {Gregorio Robles and Gonz{\'a}lez-Barahona, Jes{\'u}s M. and Cervig{\'o}n, Carlos and Capiluppi, Andrea and Izquierdo-Cort{\'a}zar, Daniel} } @conference {Robles:2014:FSD:2597073.2597129, title = {FLOSS 2013: A Survey Dataset About Free Software Contributors: Challenges for Curating, Sharing, and Combining}, booktitle = {Proceedings of the 11th Working Conference on Mining Software Repositories}, series = {MSR 2014}, year = {2014}, pages = {396{\textendash}399}, publisher = {ACM}, organization = {ACM}, address = {New York, NY, USA}, abstract = {In this data paper we describe a data set obtained by means of performing an on-line survey to over 2,000 Free Libre Open Source Software (FLOSS) contributors. The survey includes questions related to personal characteristics (gender, age, civil status, nationality, etc.), education and level of English, professional status, dedication to FLOSS projects, reasons and motivations, involvement and goals. We describe as well the possibilities and challenges of using private information from the survey when linked with other, publicly available data sources. In this regard, an example of data sharing will be presented and legal, ethical and technical issues will be discussed. }, keywords = {anonymization, data combining, data sharing, ethics, free software, microdata, msr data showcase, open data, open source, privacy, Survey}, isbn = {978-1-4503-2863-0}, doi = {10.1145/2597073.2597129}, url = {http://doi.acm.org/10.1145/2597073.2597129}, attachments = {https://flosshub.org/sites/flosshub.org/files/msr14gregorio.pdf}, author = {Gregorio Robles and Reina, Laura Arjona and Serebrenik, Alexander and Vasilescu, Bogdan and Gonz{\'a}lez-Barahona, Jes{\'u}s M.} } @article {1745, title = {SENTIMENT ANALYSIS OF FREE/OPEN SOURCE DEVELOPERS: PRELIMINARY FINDINGS FROM A CASE STUDY}, journal = {Revista Eletr{\^o}nica de Sistemas de Informa{\c c}{\~a}o}, volume = {13}, year = {2014}, month = {08/2014}, abstract = {Software development is a human intensive activity. And as such, how developers face their tasks is of major importance. In an environment such as the one that is common in FOSS (free/open source software) projects where professionals (i.e., paid developers) share the development effort with volunteers, the morale of the development and user community is of major importance. In this paper, we present a preliminary analysis using sentiment analysis techniques to a FOSS project. We therefore mine the mailing list of a project and apply these techniques to the most relevant participants. Although the application is at this time limited, we hope that this experience can be of benefit in the future to determine situations that may affect the developers or the project, such as low productivity, developer abandonment, project forking, etc. }, keywords = {developer productivity, FLOSS, mailing lists, natural language processing, openSUSE, sentiment analysis, software development; software repository mining}, doi = {10.5329/RESI.2014.1302006}, url = {http://189.16.45.2/ojs/index.php/reinfo/article/view/1677}, attachments = {https://flosshub.org/sites/flosshub.org/files/1677-6732-1-PB.pdf}, author = {Rousinopoulos, Athanasios-Ilias and Gregorio Robles and Gonz{\'a}lez-Barahona, Jes{\'u}s M.} } @proceedings {1439, title = {A Comprehensive Study of Software Forks: Dates, Reasons and Outcomes}, volume = {378}, year = {2012}, pages = {1-14}, publisher = {IFIP AICT}, abstract = {Summary. In general it is assumed that a software product evolves within the authoring company or group of developers that develop the project. However, in some cases different groups of developers make the software evolve in different directions, a situation which is commonly known as a fork. In the case of free software, although forking is a practice that is considered as a last resort, it is inherent to the four freedoms. This paper tries to shed some light on the practice of forking. Therefore, we have identified significant forks, several hundreds in total, and have studied them in depth. Among the issues that have been analyzed for each fork is the date when the forking occurred, the reason of the fork, and the outcome of the fork, i.e., if the original or the forking project are still developed. Our investigation shows, among other results, that forks occur in every software domain, that they have become more frequent in recent years, and that very few forks merge with the original project.}, keywords = {forking, forks, free software, Legal, open source, social, software evolution, sustainability}, attachments = {https://flosshub.org/sites/flosshub.org/files/paper_0.pdf}, author = {Gregorio Robles and Gonz{\'a}lez-Barahona, Jes{\'u}s M.} }