On 2015-03-16 06:43, Mikolaj Izdebski wrote:
On 03/15/2015 02:38 PM, Michael Schwendt wrote:
On Thu, 22 Jan 2015 15:15:48 +0100, Miroslav Suchý wrote:

I just spoke with two members of DNF team about default usage of DNF in mock. I 
would like to share outcomes of this
meeting.

First I would like to state that you can already optionally use DNF in your 
mock by setting:
   config_opts['package_manager'] = 'dnf'

I've switched back to Yum for now.

I expect that we will be building Fedora 22- always by yum due to short Fedora 
life cycle. Yum will be still present in
Fedora 24 for sure.

Is DNF within Mock a fully compatible replacement for Yum yet?
It seems builds take much longer now since something's downloading
(or redownloading?) lots of data for each build job before setting
up the buildroot. I don't have much time to look into it, bug shouldn't
Mock's buildroot cache files be fresh enough to avoid redownloading
packages, for example?

Redownloading packages is DNF default setting [1], which you can adjust
in mock config. I personally use caching proxy to avoid this problem and
share packages between multiple chroots.

Configurations shipped with current mock have keepcache=1 by default, so the redownloading shouldn't happen if you have yum_cache enabled. But if you use different configs than the default ones, you'll need to adjust the config manually.

Technically, yum_cache wans't "ported" to dnf, but due to the similarity of the two package managers, if the cachedir is set to /var/cache/yum (which it is in the shipped configs), it should work without changes.

Michael Simacek


[1] http://dnf.readthedocs.org/en/latest/conf_ref.html#keepcache-label

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