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Re: [ANN] Emacs-Guix 0.4

From: Alex Kost
Subject: Re: [ANN] Emacs-Guix 0.4
Date: Thu, 24 May 2018 20:21:16 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)

Ludovic Courtès (2018-05-24 14:16 +0200) wrote:

> Hello!
> Alex Kost <address@hidden> skribis:
>> Ludovic Courtès (2018-05-23 17:30 +0200) wrote:
> [...]
>>> I think ‘guix-dependent-packages’ is going to be very useful.  I wonder
>>> if we could have ‘C-u guix-dependent-packages’ list only packages that
>>> are direct dependents?  That would be helpful in some situations.
>> I agree!  Is there a shell command for this?  I mean I'd like to know
>> what Guile code can do this :-)
> No, there’s no such command.  Perhaps something to add to ‘guix refresh
> -l’, say ‘guix refresh -l direct’?

It would be good!

>> Currently, the following code is used to get dependent packages:
>>     (with-store store
>>       (run-with-store store
>>         (mlet %store-monad ((edges (node-back-edges %bag-node-type
>>                                                     (all-packages))))
>>           (return (node-transitive-edges packages edges)))))
> ‘node-transitive-edges’ traverses the whole DAG, so you should simply
> call ‘edges’ instead.
> HTH!

Yes, now it's clear, thanks!

I recalled that C-u prefix is already occupied by specifying an
arbitrary profile for the package commands.  So, I'm afraid instead of
"C-u M-x guix-dependent-packages" there will be "M-x

Or maybe I should just break this dull "convention" (I mean "C-u" for
profiles) as probably no one uses it anyway :-)


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