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Matthias Treydte a30de3b849 nixos/systemd-boot: fix systemd-boot-builder dowgrade to fail 
Since, 4ddc78818e systemd-boot-builder
is broken in two ways:

  * if no systemd-boot is currently installed *and* the NIXOS_INSTALL_BOOTLOADER
    env variable is not set, it will try to run "bootctl update", which will fail
  * if the currently installed systemd-boot version is newer than the version
    we're about to install, it will also try to run "bootctl update", which will fail

This patch changes the behaviour,

  * for the first case to still fail, but not even bother to try running
    "bootctl update" and instead erroring out with an exception
  * for the second case to leave the newer version in place, restoring
    the pre - 4ddc78818e behaviour

To do the proper version check a new "should_update" helper function was introduced,
mimicing the compare_product C function from bootctl. If the following systemd
issue gets resolved, we would have a nice way to get rid of this function:

> https://github.com/systemd/systemd/issues/23450

This change allows to again switch to a different NixOS configuration which contains
an older systemd-boot.

Co-authored-by: Martin Weinelt <mweinelt@users.noreply.github.com>
2022-05-28 13:18:21 +02:00
..
doc nixos/doc/rl-2211.section.md: changes w.r.t. cross check execution 2022-05-23 21:25:04 +02:00
lib Merge pull request #171163 from hercules-ci/nixpkgs-config-doc 2022-05-19 20:51:38 +02:00
maintainers maintainers/create-amis.sh: Add more AWS regions 2022-05-17 10:20:30 +01:00
modules nixos/systemd-boot: fix systemd-boot-builder dowgrade to fail 2022-05-28 13:18:21 +02:00
tests Merge #173996: nixosTests.custom-ca: fix meta evaluation 2022-05-23 17:52:11 +02:00
COPYING
default.nix nixos: Make system.build.vm a standard attribute based on vmVariant 2021-12-17 14:49:31 +01:00
README
release-combined.nix nixos/release: add podman, oci-containers.podman to tested 2022-05-03 19:42:33 +10:00
release-small.nix nixos/release: disable nfs3.simple 2022-03-03 06:34:59 +10:00
release.nix nixos/release: add calamares installer 2022-05-03 12:19:20 -04:00

README 

*** NixOS ***

NixOS is a Linux distribution based on the purely functional package
management system Nix.  More information can be found at
https://nixos.org/nixos and in the manual in doc/manual.