[bug#57704] [PATCH core-updates] guix: packages: Remove #f from inputs when sanitizing.

[Maxime Devos]

On 09-09-2022 17:56, Liliana Marie Prikler wrote:
> This makes it so that new-style inputs can be optional using regular Guile
> patterns, e.g. (and (target-x86-64?) rust).

Seems useful.

> * guix/packages.scm (sanitize-inputs): Filter inputs by identity before adding
> labels.

Documentation is missing.

> ---
> Note that this patch was prepared using master, but since it affects the
> package record, it needs to go to core-updates.  I don' think there should
> be a merge conflict here.

It does affect the package record, but it doesn't cause any rebuilds, so 
master should be fine:

* There aren't any current uses of #false:

(use-modules (guix packages) (gnu packages))
(package
  (inherit (specification->package "hello"))
  (inputs (list #false)))
;; guix build -f [...] --> package ‘hello@2.12.1’ has an invalid input

* In the absence of #false, the behaviour remains unchanged.

* guix/packages.scm is not used by any derivation
  (except for "guix pull" and the guix package)

As a test, I applied the patch and did
‘make && ./pre-inst-env guix build -n libreoffice’,
and it turned out I already have it installed.

Greetings,
Maxime.

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