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Re: SCSH libraries search path

From: Efraim Flashner
Subject: Re: SCSH libraries search path
Date: Sun, 6 Nov 2022 12:13:14 +0200

On Mon, Oct 31, 2022 at 12:18:50AM -0700, Tom Willemse wrote:
> Hey Guix \o/
> I've been wanting to package one of my little scripts in Guix Home and
> it uses a little library I wrote for SCSH. I've been looking at how
> Search Paths work and I'm having trouble figuring out how to make this
> work.
> Search paths seem easy enough generally, I was able to add a simple
> addition to my configuration by just adding this to the scsh package
> definition:
>     (native-search-paths
>      (list (search-path-specification
>             (variable "SCSH_LIB_DIRS")
>             (files '("share/scsh/site")))))

Try adding the 'separator' field, so it would look like this:

      (list (search-path-specification
             (variable "SCSH_LIB_DIRS")
             (separator " ")
             (files '("share/scsh/site")))))

> This successfully adds something along the lines of the following to my
> profile when I package my library:
>     export 
> SCSH_LIB_DIRS="${GUIX_PROFILE:-/gnu/store/ib05wwxl1p1b5avihw7fhvphxjhq3y97-profile}/share/scsh/site${SCSH_LIB_DIRS:+:}$SCSH_LIB_DIRS"
> The only problem here is that the SCSH_LIB_DIRS needs to be a space-separated
> list of strings instead of the usualy colon-separated list of strings.
> With the value `#f' denoting where to put the compiled default lib dir.
> For example in my manual (pre-Guix Home) configuration I have this:
>     export SCSH_LIB_DIRS="#f \"${HOME}/usr/share/scsh/\""
> To add `~/usr/share/scsh' to the places where SCSH looks for libraries
> (or packages as I guess scheme48 and scsh call them?).
> Unfortunately I can't remember how I found out about `SCSH_LIB_DIRS' and
> I can't find any reference to it in the manual at the moment.
> I looked at the `<search-path-specification>', `evaluate-search-paths',
> and `environment-variable-definition' source, but I think there need to
> be some changes made in `search-paths.scm' for this to be supported? I
> can't do it in my own configuration? If there is a way to do this
> already I would really appreciate a hint as how to do it, otherwise I'll
> have to see if I can add this support there, if nobody objects. I will
> probably need some help with this in that case.
> In case it helps, here is my little script and the library it uses:
> apologies for
> the messy UI, I'm still working on updating my CGit stylesheets and as
> you can probably also tell I'm not a designer.
> Hopefully this all makes sense :)
> Thanks for your time!
> Cheers,
> Tom

Efraim Flashner   <>   אפרים פלשנר
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