Gentoo support on build.opensuse?

timeraider · n00b Joined: 27 Jul 2015 Posts: 41

Dear all,

I do not know if this has already been asked previously but I have not found anything in the internet so far.
The openSUSE Build Service (OBS) at https://build.opensuse.org is a platform which lets you build and
test packages for different Linux distributions at one central place. There is a platform with a web-interface
available but you can also use their API to contribute to package development.
But unfortunately Gentoo Linux, our favourite Linux distribution, is not supported yet, as it can be seen under
https://en.opensuse.org/openSUSE:Build_Service_supported_build_targets
The platform itself seems to be open source.

I do know that there is a Gentoo package called dev-util/osc which provides CLI commands to OpenSUSE builds
but I do not know if Gentoo is already supported by this package.

Are there any plans to include Gentoo into the OSC?

timeraider · n00b Joined: 27 Jul 2015 Posts: 41

OBS offers compilation and distribution for Debian, Ubuntu, ArchLinux (see http://openbuildservice.org/2012/09/10/arch-linux-support/), Fedora, RedHat, OpenSUSE and others.
You can also download OBS from github and let it run locally on some server or use the build-service at OpenSUSE (they offer you much CPU power for several CPU architectures).
The OBS build scripts are hosted under https://github.com/openSUSE/obs-build.
For one person I would guess that its too much effort to implement this alone. So I am wondering if anbody is interested?
More information about OBS can be found at https://en.wikipedia.org/wiki/Open_Build_Service.

Roman_Gruber · Posted: Fri Oct 16, 2015 12:11 pm Post subject:

Why should we need that?

Gentoo is source based, we compile it on every box.
Advanced setups can use binpkgs configurations (we have tinerbox to clone packages from there), or use the cpus from other boxes with the help of distc.

i do not see any benefit at all.

Gentoo just ships source code + how to deal with that by our package manager portage.

I think you miss the fact binary noobish distro (yes i have my reason why i say that) vs source based distro => that is apples vs banans.

you may read => gentoo wiki => keywords crosscompile, distcc, overlays, binpkg

and we do not have releases. Ebuilds change on an irregular basis. some ebuilds only exists for a few hours => see openrc recently.

NeddySeagoon · Posted: Fri Oct 16, 2015 6:13 pm Post subject:

tw04l124,

timeraider · n00b Joined: 27 Jul 2015 Posts: 41

Well, I do know that Gentoo is source-based, and actually that is what I love about it ;-)

.
But any software package has to be compiled somehow before it can be installed and Gentoo is no exception here.

The advantage of OpenBuildService, in my opinion, is that it allows software developers to test if their software
still compiles on different Linux distributions if they change something (e.g., fix a bug or something like that).
They can even provide binary packages at one central point. Also when a dependent software package changes,
all other packages are re-compiled automatically.

I do not consider it a problem that the portage tree may change every few seconds. Nobody will call eix-sync
every minute or even hourly on a workstation, as long as you do not want to get banned by some mirrors :-)

.

(In my opinion) it would not be a harm to have additional build servers :-)

.

I just found this link https://wiki.gentoo.org/wiki/Project:RelEng_GRS. Maybe this idea can be re-used
also for OBS. I do not know yet, will take some time to study it in detail...

NeddySeagoon · Posted: Sat Oct 17, 2015 10:17 am Post subject:

timeraider,

I think you are missing the point a little. Lets look at just one package.

timeraider · n00b Joined: 27 Jul 2015 Posts: 41

Well, you are right that with each package the useflag combinations increase exponential. But how about using the default-set of use-flags provided by the gentoo-developers for, e.g., the KDE profile?

Having the ability to build and test Gentoo ebuilds in the open build service would be beneficial for software package providers as already Debian, OpenSUSE, RedHat and ArchLinux are supported in one-place. So if you want to distribute your software, it would be nice that you can develop and test your Gentoo ebuilds there too.

samuelbernardo · n00b Joined: 30 Jan 2016 Posts: 31

NeddySeagoon · Posted: Tue Apr 11, 2017 8:24 am Post subject:

samuelbernardo,

The stage3 tarballs are built with a tool called catalyst.
Its starts with a seed stage, builds stage1, uses stage1 to build stage2, then uses that stage2 to build stage3.

Exactly what goes into each stage is scrpted, if you change the scripts, you can build what you want.

I'm not sure if its the same tool that is used to build the minimal CDs or not.

fusion809 · n00b Joined: 15 Oct 2015 Posts: 71

I saw this topic and thought I'd mention that I occasionally go on the #opensuse-buildservice IRC channel and one time I asked if there was any interest in adding Gentoo or Sabayon packaging support. The answer I got was that the OBS once did support Gentoo packaging. People hardly used it so the OBS maintainers decided to ditch support, but (if I understand them right) they only removed the ability from the platform (the build.opensuse.org instance of the OBS), not from the OBS software itself so in theory it might be possible to add this capability to one's own OBS instance.
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timeraider · n00b Joined: 27 Jul 2015 Posts: 41

@fusion809: Can you tell us more about that IRC discussion?

I am not able to find anything in the source code, at least not in current master:

fusion809 · n00b Joined: 15 Oct 2015 Posts: 71

It was a few months ago, but someone did mention there used to be Gentoo support. I'll find out who it was.
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Open-source advocate with an inquisitive disposition

fusion809 · n00b Joined: 15 Oct 2015 Posts: 71

One note, while I'm awaiting some reply to my question #opensuse-buildservice asking who said it, searching the opensuse-buildservice mailing list for "ebuild" returns quite a few results, so it seems to support the idea that ebuilds were once a supported filetype by the OBS https://lists.opensuse.org/cgi-bin/search.cgi?advanced=no&list=opensuse-buildservice&page=1&query=ebuild&size=10. Rofl, but most of the results, while I restricted it to opensuse-buildservice mailing list, the results actually mostly pertain to other lists.
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fusion809 · n00b Joined: 15 Oct 2015 Posts: 71

Appears it was sysrich (his nick on IRC) that said that and I opened a query with him and it says he's away since 13 April 2017.
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