73 lines
1.9 KiB
Nix
73 lines
1.9 KiB
Nix
{pkgs, config, ...}:
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###### interface
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let
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inherit (pkgs.lib) mkOption mkIf;
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options = {
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boot = {
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loader = {
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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 bootloads 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 loadear.
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";
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};
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};
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};
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};
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};
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in
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###### implementation
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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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require = [
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options
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# config.system.build
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# ../system/system-options.nix
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];
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system = mkIf config.boot.loader.generationsDir.enable {
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build = {
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menuBuilder = generationsDirBuilder;
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};
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boot.loader.id = "generationsDir";
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boot.loader.kernelFile = platform.kernelTarget;
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};
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}
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