Re: SCSH libraries search path

[Tom Willemse]

Hey Efraim,

Efraim Flashner <efraim@flashner.co.il> writes:

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

Thanks for the suggestion! Unfortunately this gets me a value of
`SCSH_LIB_DIRS' like

    /home/chelys/.guix-home/profile/share/scsh-0.7

which, when I try the command `scsh -ll mpd.scm -o mpd' causes the
following error to appear:

    error: Illegal path element in $SCSH_LIB_DIRS
    $SCSH_LIB_DIRS: /home/chelys/.guix-home/profile/share/scsh-0.7
    The following element is not a string or #f: 
/home/chelys/.guix-home/profile/share/scsh-0.7

It's because SCSH treats the contents of `SCSH_LIB_DIRS' as "a sequence
of of s-expressions, which are `read' from the string"[1] and supports
either string values or the value #f. So `SCSH_LIB_DIRS' would have to
be in this case:

    "/home/chelys/.guix-home/profile/share/scsh-0.7"

I guess this just isn't supported as yet in Guix?


Cheers,

Tom