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doc: Mention --check --no-grafts as a way to force-rebuild packages.

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* doc/guix.texi (On Trusting Binaries): Document that combining --check and
--no-grafts with 'guix build' forces the rebuild of a package.

Change-Id: I4eb6be04243a52f70d0fc298f76e62f10e3d376e
Co-authored-by: Leo Famulari <leo@famulari.name>
Signed-off-by: Leo Famulari <leo@famulari.name>
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Rostislav Svoboda 2025-02-06 23:55:44 +01:00 • committed by Leo Famulari
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doc/guix.texi
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@ -29,7 +29,7 @@ Copyright @copyright{} 2014, 2015, 2016 Alex Kost@*
Copyright @copyright{} 2015, 2016 Mathieu Lirzin@*
Copyright @copyright{} 2014 Pierre-Antoine Rault@*
Copyright @copyright{} 2015 Taylan Ulrich Bayırlı/Kammer@*
Copyright @copyright{} 2015, 2016, 2017, 2019, 2020, 2021, 2023 Leo Famulari@*
Copyright @copyright{} 2015, 2016, 2017, 2019, 2020, 2021, 2023, 2025 Leo Famulari@*
Copyright @copyright{} 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 Ricardo Wurmus@*
Copyright @copyright{} 2016 Ben Woodcroft@*
Copyright @copyright{} 2016, 2017, 2018, 2021 Chris Marusich@*
@ -136,6 +136,7 @@ Copyright @copyright{} 2024 Troy Figiel@*
Copyright @copyright{} 2024 Sharlatan Hellseher@*
Copyright @copyright{} 2024 45mg@*
Copyright @copyright{} 2025 Sören Tempel@*
Copyright @copyright{} 2025 Rostislav Svoboda@*
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3 or
@ -3978,7 +3979,14 @@ finding out about non-deterministic package builds (@pxref{Invoking guix
challenge}). Similarly, the @option{--check} option of @command{guix
build} allows users to check whether previously-installed substitutes
are genuine by rebuilding them locally (@pxref{build-check,
@command{guix build --check}}).
@command{guix build --check}}). To force a full rebuild of a package
(ignoring security updates via grafts (@pxref{Security Updates}), if any
grafts exist—which is not always the case), use @option{--check}
together with @option{--no-grafts} (@pxref{Common Build Options,
@option{--no-grafts}}). Because grafts are built as their own
derivation, if the package you want to rebuild is subject to being
grafted, merely using @option{--check} will only rebuild the grafting
derivation, and not actually recompile the package.
In the future, we want Guix to have support to publish and retrieve
binaries to/from other users, in a peer-to-peer fashion. If you would