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fix bug where nix store DB would not be loadable if root was not mounted on /

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This commit is contained in:
Robert Cambridge 2024-09-10 17:39:25 +02:00
parent 52bb3ddb86
commit 08afe03265
1 changed files with 13 additions and 3 deletions
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16
nixos/modules/installer/sd-card/sd-image.nix
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@ -150,6 +150,15 @@ in
Whether to configure the sd image to expand it's partition on boot.
'';
};
nixPathRegistrationFile = mkOption {
type = types.str;
default = "/nix-path-registration";
description = ''
Location of the file containing the input for nix-store --load-db once the machine has booted.
If overriding fileSystems."/" then you should to set this to the root mount + /nix-path-registration
'';
};
};
config = {
@ -267,23 +276,24 @@ in
${pkgs.parted}/bin/partprobe
${pkgs.e2fsprogs}/bin/resize2fs $rootPart
'';
nixPathRegistrationFile = config.sdImage.nixPathRegistrationFile;
in ''
# On the first boot do some maintenance tasks
if [ -f /nix-path-registration ]; then
if [ -f ${nixPathRegistrationFile} ]; then
set -euo pipefail
set -x
${expandOnBoot}
# Register the contents of the initial Nix store
${config.nix.package.out}/bin/nix-store --load-db < /nix-path-registration
${config.nix.package.out}/bin/nix-store --load-db < ${nixPathRegistrationFile}
# nixos-rebuild also requires a "system" profile and an /etc/NIXOS tag.
touch /etc/NIXOS
${config.nix.package.out}/bin/nix-env -p /nix/var/nix/profiles/system --set /run/current-system
# Prevents this from running on later boots.
rm -f /nix-path-registration
rm -f ${nixPathRegistrationFile}
fi
'';
};