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[bug#43064] [PATCH v2] gexp: computed-file: Prevent mistakenly overridin

From: Ludovic Courtès
Subject: [bug#43064] [PATCH v2] gexp: computed-file: Prevent mistakenly overriding default option values.
Date: Mon, 31 Aug 2020 15:34:46 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux)


Maxim Cournoyer <> skribis:

> In order to do so, default to an empty options list, and expose options whose
> default values are sensitive directly as keyword arguments.
> * guix/gexp.scm (computed-file): Extract the LOCAL-BUILD? parameter from the
> OPTIONS parameter to make it a stand-alone keyword argument.  Introduce an
> OPTIONS* binding which is obtained by combining the LOCAL-BUILD? keyword and
> its value with OPTIONS.
> Suggested-by: Ludovic Courtès <>


>  (define* (computed-file name gexp
> -                        #:key guile (options '(#:local-build? #t)))
> +                        #:key guile (local-build? #t) (options '()))
>    "Return an object representing the store item NAME, a file or directory
> -computed by GEXP.  OPTIONS is a list of additional arguments to pass
> -to 'gexp->derivation'.
> +computed by GEXP.  When LOCAL-BUILD? is #t (the default), it ensures the
> +corresponding derivation is built locally.  OPTIONS may be used to pass
> +additional arguments to 'gexp->derivation'.
>  This is the declarative counterpart of 'gexp->derivation'."

Please update doc/guix.texi as well.

Otherwise LGTM, thanks!


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