Re: Persistent environment variable

[Wojtek Kosior]

> Hi List
> 
> Is there a possibility to set an environment variable in a package 
> recipe which is persistent after the build of the package? So if you 
> would install the package the environment variable is present then.
> Or is this an anti pattern?
> 
> Thanks for any inputs.
> 
> Cheers,
> Reza
>

For exporting various kinds of *search paths* in environment variables,
there's a special facility described here[1].

Alternatively, if in your use case it is sufficient to have the
variable always passed to some Guix-created executable, you might want
to look at the `wrap-program` function from `(guix build utils)`. You
can look at how it is used by existing packages. For things like this I
usually use a command like

    grep -RE 'wrap-prog' -A10 -B2 
~/.config/guix/current/share/guile/site/3.0/gnu/packages | less

Unfortunately, I don't feel competent enough to say whether something
is an anti-pattern. If any of those 2 solutions fits your needs, that's
great. If not, I hope someone else will help you out :)

Wojtek

[1] https://guix.gnu.org/manual/devel/en/html_node/Search-Paths.html


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On Mon, 5 Dec 2022 21:38:14 +0100
Reza Housseini <reza.housseini@gmail.com> wrote:

> Hi List
> 
> Is there a possibility to set an environment variable in a package 
> recipe which is persistent after the build of the package? So if you 
> would install the package the environment variable is present then.
> Or is this an anti pattern?
> 
> Thanks for any inputs.
> 
> Cheers,
> Reza
>

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