[USRP-users] [UHD] Replacing Cheetah Templates with Mako

Perelman, Nathan nperelman at LGSInnovations.com
Fri Jul 17 11:00:12 EDT 2015

I tested (from master now) with Redhat 6, and UHD did build successfully
with Mako 0.4.2.

-----Original Message-----
From: Martin Braun [mailto:martin.braun at ettus.com] 
Sent: Thursday, July 9, 2015 11:58 AM
To: Perelman, Nathan; Ben Hilburn via USRP-users
Subject: Re: [USRP-users] [UHD] Replacing Cheetah Templates with Mako

FYI, Mako 0.4.2 works. We also found some other issues with Python 3 which
could be fixed. I've updated the public branch accordingly.


On 07.07.2015 14:38, Martin Braun wrote:
> Hi Nathan,
> thanks for the feedback -- Mako 0.4.2 probably works, too, we just 
> haven't tested it yet.  It looks like we can possibly go back as far 
> as
> 0.4.1 (which is more than four years old, which seems like a fair age 
> for a dependency).
> We'll give it a spin and roll back the minimum version, if possible.
> Thanks again,
> Martin
> On 07.07.2015 14:13, Perelman, Nathan wrote:
>> I haven't tried building it yet, but it looks like this means that 
>> UHD will no long build on Redhat/CentOS 5 or 6 with the stock 
>> packages + EPEL, which would be a problem for me. The build 
>> instructions state that Mako 0.5 is the minimum version, is this 
>> accurate? If Mako 0.4.2 worked then CentOS 6 might work since it has a
package for that version.
>> Alternatively, is there some way to run just the code generation to 
>> produce a source directory that would then not require Mako to build at
>> -Nathan
>> -----Original Message-----
>> From: USRP-users [mailto:usrp-users-bounces at lists.ettus.com] On 
>> Behalf Of Martin Braun via USRP-users
>> Sent: Tuesday, July 7, 2015 1:28 PM
>> To: 'USRP-users at lists.ettus.com'; discuss-gnuradio at gnu.org
>> Subject: [USRP-users] [UHD] Replacing Cheetah Templates with Mako
>> Dear UHD users,
>> We will be replacing Cheetah as a template engine with the less-dead 
>> Mako template engine. I have pushed a branch for feedback etc. to our 
>> github
>> page:
>> https://github.com/EttusResearch/uhd/tree/uhd/python3_mako_831
>> This only affects people building UHD from source. People using 
>> binaries will not care or even need to know about this.
>> *Why are we doing this?* The issue with Cheetah is, the project seems 
>> inactive and has not been updated in a long while. Also, it is not 
>> Python 3 compatible, and some of the distributions we support are 
>> starting to switch over to Python 3 as the default. We spent some 
>> time researching other template engines not only for quality and 
>> features, but also for stability of API, user base, community etc. 
>> Mako is used widely on the webs, and has a mostly backward-compatible 
>> API for several years now, as well as an active community.
>> *What does UHD need a template engine for?* We use it to 
>> auto-generate code in some places. It saves us from typing out long, 
>> boring and repetitive sources files, which a computer can do much 
>> better than a human without typos. We do *not* use it during runtime or
anytime after installation.
>> *When will this be changed?* Soon, and will be permanent for the next 
>> major release (3.9.0).
>> *Doesn't GNU Radio work fine with Cheetah?* GNU Radio is facing 
>> similar issues (e.g. no Python 3 compatibility), but Cheetah is much 
>> more deeply woven into GNU Radio and it's harder to replace, and such 
>> things can't happen unless for major releases. It's certainly not a 
>> single commit as for UHD.
>> I'll leave this public branch up for a bit, and will then merge this 
>> into master -- but I'm happy for any feedback!
>> Thanks,
>> Martin
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users at lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com

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