If we want research software to be replicable and reusable, yet with little budget, we should follow five best practices from open source development: 1. Have a repository such that others can find and download your software 2. Be able to build software (and results) from scratch such that others can understand how your results came to be 3. Have automated tests such that you (and others) can ensure quality, especially after changes 4. Make your software extensible, notably by using object orientation and applying the open/close principle – open for extension, closed for changes 5. Have plenty of examples that show how to use your software. One great environment to achieve this is Jupyter Notebooks, where you can combine text and executable code all in one (examples!) showing how your final result cam to be (build!) Plus, they allow you to include assertions (tests!) as well as arrange software in an object-oriented fashion (extensibility!). Of course, you can also put them in a repository :-)

1. SUSTAINABLE
RESEARCH
SOFTWARE
Andreas Zeller
CISPA Helmholtz Center
for Information Security
@AndreasZeller

2. ANDREAS
HILDEBRANDT
A RESEARCHER

3. BALL

4. ANDREAS
HILDEBRANDT
A RESEARCHER

5. ANDREAS
HILDEBRANDT
A PROGRAMMER
BALL = 700,000 Lines of Code

6. ANDREAS
HILDEBRANDT
A MAINTAINER
BALL: Hundreds of Active Users

7. ANDREAS
HILDEBRANDT
A MULTITALENT
And he can teach, too!

8. SOFTWARE
ENGINEERING

10. SOFTWARE
ENGINEERING
Great for multi-million projects

11. OPEN
SOURCE
SOFTWARE
Great for small (i.e., research) projects

12. OPEN
SOURCE
SOFTWARE
1. Have a repo
2. Anyone can build
3. Have tests
4. Be open for extension
5. Have examples

13. A REPO
HAVE
Have a public repository – for instance GitHub

14. BUILD
ANYONE CAN
Everybody should be able to build results from scratch

15. TESTS
HAVE
Tests should run automatically to validate results

16. void connect() {
if (connection_type == MODEM_56K)
{
Modem modem = new Modem();
modem.connect();
}
else if (connection_type == ETHERNET) …
else if (connection_type == WLAN) …
else if (connection_type == UMTS) …
}
EXTENSION
BE OPEN FOR
MyApp
connect()
Connection
connect()
hangup()
ModemConnection
connect()
hangup()
WLANConnection
connect()
hangup()
EthernetConnection
connect()
hangup()
Be open for extension and closed for changes

17. EXAMPLES
HAVE
Produce tutorials with examples that show how to use your code

18. DEMO:
FUZZINGBOOK@JUPYTER
See www.fuzzingbook.org

19. SUSTAINABLE
RESEARCH
SOFTWARE
@AndreasZeller
1. Have a repo
2. Anyone can build
3. Have tests
4. Be open for extension
5. Have examples