1. Cross-Distribution Packaging Made Easy OSDC 2011, Canberra
Tim Serong
Senior Clustering Engineer
SUSE

2. Why Am I Talking About Software Packaging?
A tarball is not a product
– Arjen Lentz
Show of hands:
- Who primarily develops software?
- Who also packages it? For some distro or other?
If you hack on GIMP (etc.) not your problem, but...
I have a source code repo & tarballs
Casual/new users don't want these things
Like takeaway Chinese food without a plasic box

3. Problems for Developers
Multiple Distributions
Multiple Versions
Multiple Architectures
Minimal time, hardware, etc.
I basically hack on one distro, one arch
Maybe one other, sometimes, in a VM

4. Solution: The Open Build Service
Builds packages for various Linuces
build.opensuse.org (or run your own)
Give it a tarball and spec/dsc
It does the rest
- show of hands
- who's heard of it?
- who's used it?
- platform for building packages and ISOs – web ui
- nee openSUSE build service
- openSUSE
- SLES
- isos, vms
- openSUSE, SLES, RHEL, CentOS, Fedora, Mandriva, Debian, Ubuntu
- describe worker, etc. running build kvm
- gonna try make this a bit of a rambling show & tell

5. Packages and Projects All packages are part of a project
Multiple developers can work on a project / package
Projects define the target distros
Packages can be built for all or a subset of distros

10. Entertainment Over Dinner
The story here is about openastro, which I packaged using the web UI only, whist at a friend's place for dinner

12. Pull from URL
Can also pull from git, svn etc.

13. Can't get around writing a spec
Generators for some things (rubygems)
Some things are easier than others (python, perl)

17. A Little More Complexification

23. Behind Every Great GUI...

24. We Have a Command Line Interface
osc co - checkout package
osc add - add files to package
osc build - build on local machine
osc diff - diff local copy with OBS server
osc vc - edit changelog
osc ci - checkin changes
Osc itself Is, of course, packaged using obs

27. Playing Well With Others

28. Collaboration Projects can depend on each other
Anyone can branch packages...
...and submit changes back to the main project
Maintainers review and (hopefully!) accept

34. Enough With the Screenshots!

35. At this point in the presentation, a live demo ensued, where a small “hello world” style C program was packaged for Centos, Debian, Fedora, RHEL, SLES, openSUSE and Ubuntu.
OBS project is at: ect=home:tserong
Resultant packages are at: rue

36. So, Was That Easy?

37. What Did I Miss? OBS under GPL, you can hack it.
Used by MeeGo, VLC, GNOME 3, Dell, Cray...
Android client, various APIs
More distros
ISO / VM creation

38. References http://openbuildservice.org/
#opensuse-buildservice on Freenode