Open Stack

There's a ton of reviews/comparisons out there, only a google away.


________________________________
From: Doug Hellmann [doug.hellmann at dreamhost.com]
Sent: Tuesday, July 16, 2013 1:45 PM
To: OpenStack Development Mailing List
Subject: Re: [openstack-dev] [Change I30b127d6] Cheetah vs Jinja

Great, I think I had the Mako syntax mixed up with a different templating language that depended on having a DOM to work on.

Can someone put together a more concrete analysis than "this is working" so we can compare the tools? :-)

Doug

On Tue, Jul 16, 2013 at 12:29 PM, Nachi Ueno <nachi at ntti3.com<mailto:nachi at ntti3.com>> wrote:
Hi Doug

Mako looks OK for config generation
This is code in review.
https://review.openstack.org/#/c/33148/23/neutron/services/vpn/device_drivers/template/ipsec.conf.template



2013/7/16 Doug Hellmann <doug.hellmann at dreamhost.com<mailto:doug.hellmann at dreamhost.com>>:
>
>
>
> On Tue, Jul 16, 2013 at 9:51 AM, Daniel P. Berrange <berrange at redhat.com<mailto:berrange at redhat.com>>
> wrote:
>>
>> On Tue, Jul 16, 2013 at 09:41:55AM -0400, Solly Ross wrote:
>> > (This email is with regards to https://review.openstack.org/#/c/36316/)
>> >
>> > Hello All,
>> >
>> > I have been implementing the Guru Meditation Report blueprint
>> > (https://blueprints.launchpad.net/oslo/+spec/guru-meditation-report),
>> > and the question of a templating engine was raised.  Currently, my
>> > version of the code includes the Jinja2 templating engine
>> > (http://jinja.pocoo.org/), which is modeled after the Django
>> > templating engine (it was designed to be an implementation of the
>> > Django templating engine without requiring the use of Django), which
>> > is used in Horizon.  Apparently, the Cheetah templating engine
>> > (http://www.cheetahtemplate.org/) is used in a couple places in Nova.
>> >
>> > IMO, the Jinja template language produces much more readable templates,
>> > and I think is the better choice for inclusion in the Report framework.
>> >  It also shares a common format with Django (making it slightly easier
>> > to write for people coming from that area), and is also similar to
>> > template engines for other languages. What does everyone else think?
>>
>> Repeating my comments from the review...
>>
>> I don't have an opinion on whether Jinja or Cheetah is a better
>> choice, since I've essentially never used either of them (beyond
>> deleting usage of ceetah from libvirt). I do, however, feel we
>> should not needlessly use multiple different templating libraries
>> across OpenStack. We should take care to standardize on one option
>> that is suitable for all our needs. So if the consensus is that
>> Jinja is better, then IMHO, there would need to be an blueprint
>> + expected timeframe to port existing Ceetah usage to use Jinja.
>>
>> Regards,
>> Daniel
>
>
> The most current release of Cheetah is from 2010. I don't have a problem
> adding a new dependency on a tool that is actively maintained, with a plan
> to migrate off of the older tool to come later.
>
> The Neutron team seems to want to use Mako
> (https://review.openstack.org/#/c/37177/). Maybe we should pick one? Keep in
> mind that we won't always be generating XML or HTML, so my first question is
> "how well does Mako work for plain text?"
>
> Doug
>
>>
>> --
>> |: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/
>> :|
>> |: http://libvirt.org              -o-             http://virt-manager.org
>> :|
>> |: http://autobuild.org       -o-         http://search.cpan.org/~danberr/
>> :|
>> |: http://entangle-photo.org       -o-       http://live.gnome.org/gtk-vnc
>> :|
>>
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