mock

Notes about building a package in mock using fedora.

Running mock

mock -r epel-7-x8664 –init

Now I need to grab a source rpm from centos to try building.

The guide to obtain the sources from centos explains that I should use the script “getsources.sh” to download sources from the lookaside repository. The script is part of the centos git common repository.

I chose to build emacs. I cloned the emacs centos rpm project in a local folder.

The commands are:

SCRIPTDIR=/home/polka/centos/centos-git-common ${SCRIPTDIR}/getsources.sh rpmbuild –nodeps –define "%topdir /home/polka/centos/sources/emacs" -bs SPECS/emacs.spec

The result of this last step was a src rpm file emacs-24.3-20.fc28.src.rpm

Building the rpm under mock

I invoked the mock command:

mock -r epel-7-x8664 emacs-24.3-20.fc28.src.rpm

Mock started fetching rpms from the repositories as per its configuration [1]. It turns out that the yum cache is not enabled. The documentation of the yum plugin [2] indicates what entries there should be for the yum cache to be active.

The documentation [3] shows that there are four places where the mock configuration could go. The yum plugin could be configured for the local user using ~/.mock/user.cfg

[1]

epel 7 mock configuration path: /etc/mock/epel-7-x86_64.cfg

[2]

plugin yum cache user documentation url: https://github.com/rpm-software-management/mock/wiki/Plugin-YumCache accessed 15 Sep 2018

[3]

The locations are /etc/mock/site-defaults.cfg etc/mock/<buildroot>.cfg ~.mock/user.cfg ~/.config/mock.cfg (since mock-1.2.15)

config_opts['pluginconf']['yumcacheenable'] = True
config_opts['pluginconf']['yumcacheopts'] = {}
config_opts['pluginconf']['yumcacheopts']['maxagedays'] = 30
config_opts['pluginconf']['yumcacheopts']['maxmetadataagedays'] = 30
config_opts['pluginconf']['yumcacheopts']['dir'] = "%(cachetopdir)s/%(root)s/%(packagemanager)scache/"
config_opts['pluginconf']['yumcacheopts']['targetdir'] = "var/cache/%(packagemanager)s"
config_opts['pluginconf']['yumcacheopts']['online'] = True

mock yum cache

With the configuration modified as in the previous section, mock is saving the rpm files locally under /var/cache/mock

The packages will occupy space in the /dev/mapper/fedora-root partition, currently 34% full and with 31G available.

After building the package the disk usage is 38% in /dev/mapper/fedora-root and there are 30G available.

Result

The result of the mock invocation was a set of rpm packages and a source rpm package. All were placed in a ‘results’ folder [4].

[4]

mock result folder. path: /var/lib/mock/epel-7-x86_64/result