The document highlights the evolution and significance of open source software, particularly in the SAP ecosystem. It outlines SAP's involvement in open source initiatives since 1998, detailing various projects like OpenUI5 and Gardener, and emphasizes the role of open source in modern computing environments. Additionally, it discusses the importance of open source licenses and the contributions of SAP employees to the open source community.

1. ©KMD
_ Public - KMD A/S
1
@ SIT Barcelona, October 11th 2019
Open source in
the SAP world

2. ©KMD
_ Public - KMD A/S
INTERNT
WHO AM I?
2
_ Morten Wittrock
_ SAP Mentor
_ SAP PRESS author
_ SAP Inside Track Copenhagen co-organizer
_ Frequent speaker at other SAP Inside Tracks
_ Principal architect at KMD in Denmark
_ SAP Community: https://people.sap.com/mortenw
_ Twitter: @mwittrock

3. ©KMD
_ Public - KMD A/S
3
Open source
overview

4. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
PROPRIETARY SOFTWARE: WINDOWS
4
_ For a fee, Microsoft will license Windows to you
_ To use the software, you must accept the terms
of that license
_ The license gives you the right to use the
software
_ You do not have the right to modify Windows
_ The Windows source code is controlled by
Microsoft
_ You do not have access to it
_ You have no way to follow the software’s
development from the outside

5. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
OPEN SOURCE SOFTWARE: LINUX
5
_ To use Linux, you still need to accept a license
_ The terms of that license, however, are very
different
_ It gives you the right to not only use, but also
modify the software
_ You have access to the full source code
_ Linux is developed in a very transparent fashion

6. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
OPEN SOURCE RUNS THE WORLD
6
_ Linux on the desktop never took off, but Linux and open
source in general won everywhere else
_ Today there are four mainstream consumer operating
systems:
_ macOS
_ Windows
_ Android
_ iOS
_ Three out of those four are based on open source
_ In server operating systems, Linux is absolutely huge

7. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
OPEN SOURCE RUNS THE WORLD
7
_ Internet infrastructure like web, mail and DNS
_ Cloud providers like Amazon and Google run their data
centers on Linux
_ Depending on which estimate, up to 90% of commercial
applications contain OSS components like:
_ Software frameworks
_ Programming languages
_ Libraries
_ Databases

8. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
OPEN SOURCE LICENSES
8
_ Source availability ≠ open source
_ Open source is all about the license
_ The license lays out in detail what you can and cannot
do with the software
_ Contrary to proprietary software, open source licenses
allow you to freely share and modify the code
_ The Open Source Initiative is sort of (but not quite) a
central clearing-house for licenses
_ There are almost a hundred OSI-approved licenses

9. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
PERMISSIVE VS COPYLEFT
9
_ In practice, however, three licenses dominate:
_ MIT
_ Apache
_ GPL (GNU General Public License)
_ GPL is a copyleft license → It is sticky; derived
works are automatically GPL as well
_ The MIT and Apache are permissive licenses →
“Anything Goes” + sublicensing is allowed

10. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
TESLA’S GPL VIOLATION
10

11. ©KMD
_ Public - KMD A/S
11
SAP’s open
source efforts

12. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
SAP’S OPEN SOURCE HISTORY
12
_ 1998: R/3 is ported to run on Linux
_ 2004: SAP is a founding member of the Eclipse
Foundation
_ 2011: SAP joins the OpenJDK project
_ 2013: OpenUI5 is open sourced
_ 2015: SAP is a founding member of the Cloud
Foundry Foundation
_ 2017: SAP joins the Cloud Native Computing
Foundation
_ 2018: The Gardener and Kyma projects are open
sourced, OSPO established

13. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
SAP’S OPEN SOURCE HISTORY
13
_ Today SAP is a member of:
_ The Linux Foundation
_ The Cloud Native Computing Foundation
_ The Cloud Foundry Foundation
_ The Apache Software Foundation
_ The Eclipse Foundation
_ Et al
_ More than 1000 SAP employees have made
contributions to open source on GitHub

14. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
SAP’S OPEN SOURCE PROGRAM OFFICE
14
_ Established early 2018
_ Coordinates SAP’s many open source efforts
_ Support and improve processes around open
source inside SAP
_ Engage with open source communities
_ Increase visibility of SAP’s contributions

15. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
THE OPEN SOURCE BAR AT TECHED
15

16. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
OPENUI5
16
_ OpenUI5 is an open source web development
framework
_ Based on HTML5 and jQuery
_ UI5 minus a few proprietary libraries
_ Open sourced by SAP in 2013
_ Contributions accepted on GitHub since 2014
_ Not the first outbound SAP open source project,
but probably the first widely known one

17. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
SAPMACHINE
17
_ SapMachine is based on OpenJDK (which SAP
also contributes to)
_ I.e. it is an open source Java implementation
_ Basically a version of OpenJDK supported
directly by SAP
_ A “friendly fork”

18. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
GARDENER
18
_ Gardener is a tool that lets you manage your
Kubernetes clusters
_ The “Kubernetes botanist”
_ Gardener itself runs on Kubernetes
_ Work started in 2017, and the project was open
sourced in 2018
_ Gardener made it into the TechEd keynote

19. ©KMD
_ Public - KMD A/S
19
Community open
source projects

20. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
SAPLINK
20
_ SAPlink is the first community open source project I
came across
_ Launched in 2006 by old-school SDN members Ed
Herrmann and Dan McWeeney
_ They won the TechEd Demo Jam that year
_ SAPlink lets you share ABAP source outside of an SAP
system and treat source code as text
_ (Like most other languages out there)
_ A spiritual ancestor to abapGit

21. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
ABAPGIT
21
_ abapGit is the most well known SAP community
open source project
_ The clue is in the name: It’s a Git client written
in ABAP
_ I.e. version control, collaboration, automation
with GitHub Actions etc.
_ The project was started by Danish SAP Mentor
Lars Hvam
_ In addition to Lars, the project has 76
contributors on GitHub
_ Integrated into the SCP ABAP environment aka
Steampunk

22. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
CPILINT
22
_ CPILint is an automated governance tool for SAP
Cloud Platform Integration
_ You set up governance rules, that you want your
integrations to comply with
_ The tool does the heavy lifting of checking whether
your integrations are actually compliant
_ Executable developer guidelines
_ Developed by yours truly and released as open
source in 2019

23. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
DOTABAP.ORG
23

24. ©KMD
_ Public - KMD A/S
INTERNTINTERNT
LINKS
24
_ SAP Open Source landing page
_ SAP on GitHub
_ abapGit
_ CPILint
_ Dotabap
_ OpenUI5
_ Gardener
_ SapMachine

25. ©KMD
_ Public - KMD A/S
25
Thank you!