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Re: more package transformations: overrides

From: Ricardo Wurmus
Subject: Re: more package transformations: overrides
Date: Thu, 23 Mar 2023 10:32:38 +0100
User-agent: mu4e 1.8.13; emacs 28.2

Maxim Cournoyer <> writes:

>> Considering that the transformations API assumes that you understand
>> that higher order functions exist and what to do with them, I think it
>> would be good to offer a slightly less advanced method of overriding
>> packages.
>> Manifests can do anything, but this also makes them rather intimidating
>> for many of my colleagues.
> OK; then my question would be: why stop at transformations?  Perhaps we
> could simply have a way to feed arbitrary guix command line arguments
> from a file, e.g.
> guix shell --args-file=my-arguments.txt

The transformations command line options are rather verbose:


I think it would improve usability to be able to use the *same* names in
an override file.  Got a package with name “python-pytorch” in that
file?  It replaces “python-pytorch” in the graph.


On the separate topic of reading arguments from elsewhere, though, I
think being able to read arguments from stdin could be useful.  Without
having to add a new option one could then do

    guix shell < my-arguments.txt


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