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From: Reza Housseini <reza@housseini.me>
To: Arun Isaac <arunisaac@systemreboot.net>, guix-science@gnu.org
Cc: ravanan@systemreboot.net
Subject: Re: Guix, CWL, ravanan and reproducibility talk at UCL
In-Reply-To: <87cxzrb6r5.fsf@systemreboot.net>
References: <87cxzrb6r5.fsf@systemreboot.net>
Date: Thu, 23 Apr 2026 16:57:48 +0200
Message-ID: <87wlxxbu6r.fsf@housseini.me>
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List-Id: <ravanan.systemreboot.net>

Hi Arun

Thanks for sharing! Do you have any experience running this from Python?
E.g. generating the CWL files in Python? And do I understand corecctly
that ravanan is not tied to CWL and/or guix?

Best,
Reza

> Hi,
>
> I am a postdoc at University College London (UCL). I have been working
> on ravanan[1] for a few years now. ravanan is a Common Workflow
> Language (CWL) runner that uses Guix to provide strong reproducibility
> guarantees and content-addressed caching.
>
> Yesterday, I gave a talk in my department at UCL on Guix, CWL, ravanan
> and reproducibility. The slides are at
> https://files.systemreboot.net/ucl-guix-ravanan-seminar.pdf
>
> To the bioinformaticians reading this, it may be of interest that we
> ported pggb (the pangenome building pipeline) from the original bash
> script to CWL. Links to the original and the port below:
>
> https://github.com/pangenome/pggb
> https://github.com/arunisaac/pggb.cwl
>
> Regards,
> Arun
>
> [1]: https://forge.systemreboot.net/ravanan/