Deciding if an OSS project meets the required standards for adoption is hard, and keeping up-to-date with a rapidly evolving project is even harder. Making decisions about quality and adoption involves analysing code, documentation, online discussions, and issue trackers. There is too much information to process manually and it is common that uninformed decisions are made with detrimental effects. This talk will make an overview of the EU H2020 CROSSMINER project, which aims to remedy such problems by automatically extracting required knowledge and injecting it into the developers' Integrated Development Environments (IDE), at the time they need it to make design decisions. This allows them to reduce their effort in knowledge acquisition and to increase the quality of their code. CROSSMINER uniquely combines advanced software project analyses with online IDE monitoring. Developers will be monitored to infer which information is timely, based on readily available knowledge stored earlier by a set of advanced offline deep analyses of related OSS projects.

1. Developer-Centric Knowledge Mining from
Large Open-Source Software Repositories
OW2Con 2017
Davide Di Ruscio - University of L’Aquila
University of L'Aquila OW2Con 2017 1

2.  Related activities
- Searching for candidate components
- Evaluating a set of retrieved candidate components to find
the most suitable one
- Understanding how to use the selected components
- Monitoring the selected components
Context
Development of new software systems
by reusing existing open source components
University of L'Aquila OW2Con 2017 2

3.  Challenging tasks
- assessing quality, maturity,
activity of development and user
support is not a straightforward
process
 Different and
heterogeneous source of
information
- e.g., code repositories,
communication channels, bug
tracking systems
Selecting and Using OSS components
Source code
Q&A systems
Bug Reports
API
Documentation
Tutorials
Configuration
Management Systems
University of L'Aquila OW2Con 2017 3

4. University of L'Aquila OW2Con 2017 4

5. University of L'Aquila OW2Con 2017 5
Analysis of OSS projects in OSSMETER
OSS
Project
Communication channel
(Newsgroup/forum/
mailing list)
Source Code
Repository
Bug Tracking
System
OSS Forge
Metadata

6. University of L'Aquila OW2Con 2017 6
Analysis of OSS projects in OSSMETER

7.  Wealth of data to present
 Needs to be user-friendly / digestible
 Presentation driven by the quality model
OW2Con 2017
Presentation
University of L'Aquila

8. The default OSSMETER quality model
University of L'Aquila OW2Con 2017 8

9. University of L'Aquila OW2Con 2017 9

10. University of L'Aquila OW2Con 2017 10

11. CROSSMINER aims at
doing more
University of L'Aquila OW2Con 2017 11

12. University of L'Aquila OW2Con 2017 12
Source code
Q&A systems
Bug Reports
API
Documentation
Tutorials
Configuration
Management Systems

13. University of L'Aquila OW2Con 2017 13
CROSSMINER: high-level view
Data Preprocessing Capturing Context
Producing
Recommendations
Presenting
Recommendations

14. Mining and Analysis Tools
University of L'Aquila OW2Con 2017 14
CROSSMINER: high-level view
Data Preprocessing Capturing Context
Producing
Recommendations
Presenting
Recommendations
Knowledge Base
Source Code
Miner
NLP
Miner
Configuration
Miner
Cross project
Analysis
OSS forges
Source Code
Natural
language
channels
Configuration
Scripts
lookup/store
mine

15. University of L'Aquila OW2Con 2017 15
CROSSMINER: high-level view
Data Preprocessing Capturing Context
Producing
Recommendations
Presenting
Recommendations
Developer
IDE
Knowledge Base
query
recommendations
Data
Storage
Real-time recommendations that serve productivity and quality increase

16. www.crossminer.org
@crossminer
University of L'Aquila OW2Con 2017 16