29027fd1e1
Using pkgs.lib on the spine of module evaluation is problematic because the pkgs argument depends on the result of module evaluation. To prevent an infinite recursion, pkgs and some of the modules are evaluated twice, which is inefficient. Using ‘with lib’ prevents this problem.
64 lines
1.7 KiB
Nix
64 lines
1.7 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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generationsDirBuilder = pkgs.substituteAll {
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src = ./generations-dir-builder.sh;
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isExecutable = true;
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inherit (pkgs) bash;
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path = [pkgs.coreutils pkgs.gnused pkgs.gnugrep];
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inherit (config.boot.loader.generationsDir) copyKernels;
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};
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# Temporary check, for nixos to cope both with nixpkgs stdenv-updates and trunk
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platform = pkgs.stdenv.platform;
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in
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{
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options = {
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boot.loader.generationsDir = {
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enable = mkOption {
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default = false;
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description = ''
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Whether to create symlinks to the system generations under
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<literal>/boot</literal>. When enabled,
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<literal>/boot/default/kernel</literal>,
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<literal>/boot/default/initrd</literal>, etc., are updated to
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point to the current generation's kernel image, initial RAM
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disk, and other bootstrap files.
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This optional is not necessary with boot loaders such as GNU GRUB
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for which the menu is updated to point to the latest bootstrap
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files. However, it is needed for U-Boot on platforms where the
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boot command line is stored in flash memory rather than in a
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menu file.
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'';
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};
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copyKernels = mkOption {
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default = false;
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description = "
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Whether copy the necessary boot files into /boot, so
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/nix/store is not needed by the boot loader.
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";
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};
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};
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};
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config = mkIf config.boot.loader.generationsDir.enable {
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system.build.installBootLoader = generationsDirBuilder;
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system.boot.loader.id = "generationsDir";
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system.boot.loader.kernelFile = platform.kernelTarget;
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};
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}
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