Re: Problem using multiple manifest files

[Mikhail Kryshen <mikhail@kryshen.net>]

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Chris Marusich <cmmarusich@gmail.com> writes:

> Mikhail Kryshen <mikhail@kryshen.net> writes:
>
>> (use-modules (srfi srfi-1)
>>              ((guix ui) #:select (make-user-module)))
>>
>> (define (load-manifest file)
>>   ;; Load manifest file in a fresh module with necessary imports.
>>   (let ((module (make-user-module '((guix profiles) (gnu)))))
>>     (save-module-excursion
>>      (lambda _
>>        (set-current-module module)
>>        (load (canonicalize-path file))))))
>
> Neat example!

Thanks! 

> But what is make-user-module doing, and is it necessary?

I looked into the Guix source and reproduced what "guix package -m" does
to load a manifest file.  Make-user-module procedure appear to be used
in Guix to dynamically create modules for running user code.  I could
have simply used "load" here, but then all the files would be loaded in
the same environment and could potentially interfere with each other.

-- 
Mikhail

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