[ELGIS] Getting started with mock..

[Tyler Mitchell]

Thanks a lot for the thorough response Mathieu!  I have the rpmbuild side of things running well now, and have focused on mock tonight with some success.  I'll give your el6 testing config a try and see how it goes.  I've got SL6 running fine, so should be good to go.  

More tomorrow night, thanks!
Tyler


----- Original Message -----
From: Mathieu Baudier <mbaudier at argeo.org>
Date: Wednesday, November 9, 2011 10:35 pm
Subject: Re: [ELGIS] Getting started with mock..
To: "Hatzopoulos, Nikolaos" <hatzopou at chapman.edu>
Cc: "Tyler Mitchell (OSGeo)" <tmitchell at osgeo.org>, "el at lists.osgeo.org" <el at lists.osgeo.org>

> > On the ELGIS wiki page it says to ask for tips for starting 
> with mock - here I am :)  I found the config file examples but 
> am currently digging for tutorials.  I'm sure I'll find 
> something soon, but wanted to ask here first.
> 
> # RPMBUILD
> If you want to develop new packages, you can start by setting up an
> RPM build environment without mock, as Nikolaos has described in his
> previous mail.
> You will get a better feeling of what building/rebuilding RPMs is
> about, and you can iterate more quickly than with mock when developing
> the spec file and the necessary patches on the code.
> 
> There is also an interesting reference on the CentOS wiki:
> http://wiki.centos.org/HowTos/SetupRpmBuildEnvironment
> (and http://wiki.centos.org/HowTos/RebuildSRPM)
> 
> # MOCK
> When building in mock the same mechanism with rpmbuild etc. is used,
> but a new chrooted environment is created where only the packages
> required for the build will be installed and the build is started
> within this environment.
> This ensures that the spec files define all dependencies and 
> makes for
> reproducible builds.
> 
> 1. Install mock from EPEL
> yum install mock
> (doesn't work on RHEL Desktop, because it lacks some dependencies)
> 
> 2. Add you regular user to the mock group
> sudo usermod -a -G mock myusername
> (log out / log in in order to make sure that this change is 
> taken into account)
> 
> 3. You then need to define a mock configuration with the repositories
> you want to use.
> 
> You will find the mock configuration files used for ELGIS here:
> https://projects.argeo.org/elgis/svn/factory/trunk/modules/org.argeo.elgis.rpmfactory/files/etc/mock
> (use the elgis-6-testing* ones)
> 
> Copy them to /etc/mock (or to a separate directory that you will pass
> to mock as argument).
> 
> 4. To rebuild an SRPM
> mock -r elgis-6-testing-x86_64 --rebuild /path/to/srpm
> 
> Tip: use the --debug option to see all the build information, or tail
> /var/lib/mock/elgis-6-testing-x86_64/result/build.log
> 
> In order to create the SRPM from file, you can either put the
> SPEC/SOURCES file in the rpmbuild environment (cf. Nikolaos 
> mail) and
> run:
> rpmbuild --nodeps -bs /path/to/myspecfile.spec
> 
> or use mock --buildsrpm
> (I haven't tested it yet, because it was not available in the mock
> from CentOS that we used for ELGIS5, but it seems more 
> consistent and
> there is no reason why it shouldn't work)
> 
> 5. When the build is completed your RPMs are available here:
> /var/lib/mock/elgis-6-testing-x86_64/result/
> 
> while the related rpmbuild top dir is here:
> /var/lib/mock/elgis-6-testing-x86_64/root/builddir/build/
> 
> If something went wrong, you can switch to the chroot 
> environment in a shell:
> mock -r elgis-6-testing-x86_64 --shell
> 
> and work on the RPM just as described by Nikolaos with rpmbuild but
> within the chrooted environment.
> 
> # NOTES
> - if you want to contribute new packages, building them in mock first
> is not "mandatory" as such, but I *very* much appreciate it.
> Tracking down each missing dependency by relaunching the whole mock
> build is not the funniest part and if you don't do it in mock before
> contributing, I will be the one who will have to do it before
> publishing.
> 
> - the ELGIS spec files are here:
> https://projects.argeo.org/elgis/svn/factory/trunk/rpmbuild
> 
> You can check out them somewhere with subversion:
> svn co https://projects.argeo.org/elgis/svn/factory/trunk elgis-
> testing
> The directory structure may soon change to be more in line with other
> spec files repositories (e.g. Volker's one on GitHub), but the
> information is here and versioned.
> If you want to improve existing packages, please provide diffs against
> the latest version of trunk.
> 
> Cheers,
> 
> Mathieu
> 
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