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Hackathon: Mumi and Cuirass

From: Ricardo Wurmus
Subject: Hackathon: Mumi and Cuirass
Date: Fri, 03 May 2019 23:45:00 +0200
User-agent: mu4e 1.0; emacs 26.1

Hey there,

now that Guix 1.0 is out I think it’s a good time to improve our tools
to allow us to better identify problems with package builds and to
better respond to bug reports and patch submissions.

1) Mumi

We are using Debbugs for bug reports (address@hidden) and patches
(address@hidden), and one of the interfaces to the bug tracker is
the web interface at  This is backed by a
little Guile tool called “Mumi”.  The code is hosted here:

Mumi uses guile-email and guile-debbugs to talk to the Debbugs SOAP API
(that’s a verbose XML API) and render the results as a web page.
Currently, the search isn’t really working so well due to limitations on
the Debbugs side, and things are a little slower than they should be.
Also, the interface only provides read access — you cannot comment on
issues with a web browser.

I’d like us to change these two things.  Instead of using the Debbugs
API for searching I’d like Mumi to keep a local append-only database of
email messages and a mutable table of issue meta data (such as the issue
status, the submitter, the owner, etc).  For write access I’d like us to
offer a form that allows people to submit comments right there.  We’d
need to think about ways to prevent SPAM, obviously.  (Options are: spam
assassin, user logins, GPG signed text that’s checked against a keyring,

If you’d like to work on this with me, please get in touch!

2) Cuirass

Cuirass has a web interface:

Unfortunately, it doesn’t yet enable us to answer questions like:

- What packages are currently failing to build on aarch64?
- What is the history of icecat builds on i686?
- Can you show me all builds matching “rust” across all architectures?
- What builds are blocked because of this one failing build?

Implementing features that would allow us to better see the build status
for all of our supported architectures would be very welcome.  It would
be even better if we could also see an overview of our build nodes and
what they are currently doing – how many build slots are still
available?  Why is only one of the nodes doing any work?

We have the freedom to integrate Cuirass more closely with the rest of
Guix and the offloading framework, so this seems like a good target.

If you find this kind of project interesting please get in touch!  You
don’t need to know how to do any of these tasks as long as you are
motivated to discuss this and help us find solutions together.

Let’s do this!


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