83 lines
2.6 KiB
Nix
83 lines
2.6 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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blCfg = config.boot.loader;
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dtCfg = config.hardware.deviceTree;
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cfg = blCfg.generic-extlinux-compatible;
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timeoutStr = if blCfg.timeout == null then "-1" else toString blCfg.timeout;
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# The builder used to write during system activation
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builder = import ./extlinux-conf-builder.nix { inherit pkgs; };
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# The builder exposed in populateCmd, which runs on the build architecture
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populateBuilder = import ./extlinux-conf-builder.nix { pkgs = pkgs.buildPackages; };
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in
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{
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options = {
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boot.loader.generic-extlinux-compatible = {
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enable = mkOption {
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default = false;
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type = types.bool;
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description = lib.mdDoc ''
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Whether to generate an extlinux-compatible configuration file
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under `/boot/extlinux.conf`. For instance,
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U-Boot's generic distro boot support uses this file format.
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See [U-boot's documentation](https://u-boot.readthedocs.io/en/latest/develop/distro.html)
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for more information.
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'';
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};
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useGenerationDeviceTree = mkOption {
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default = true;
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type = types.bool;
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description = lib.mdDoc ''
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Whether to generate Device Tree-related directives in the
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extlinux configuration.
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When enabled, the bootloader will attempt to load the device
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tree binaries from the generation's kernel.
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Note that this affects all generations, regardless of the
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setting value used in their configurations.
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'';
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};
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configurationLimit = mkOption {
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default = 20;
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example = 10;
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type = types.int;
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description = lib.mdDoc ''
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Maximum number of configurations in the boot menu.
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'';
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};
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populateCmd = mkOption {
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type = types.str;
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readOnly = true;
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description = lib.mdDoc ''
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Contains the builder command used to populate an image,
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honoring all options except the `-c <path-to-default-configuration>`
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argument.
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Useful to have for sdImage.populateRootCommands
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'';
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};
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};
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};
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config = let
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builderArgs = "-g ${toString cfg.configurationLimit} -t ${timeoutStr}"
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+ lib.optionalString (dtCfg.name != null) " -n ${dtCfg.name}"
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+ lib.optionalString (!cfg.useGenerationDeviceTree) " -r";
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in
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mkIf cfg.enable {
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system.build.installBootLoader = "${builder} ${builderArgs} -c";
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system.boot.loader.id = "generic-extlinux-compatible";
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boot.loader.generic-extlinux-compatible.populateCmd = "${populateBuilder} ${builderArgs}";
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};
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}
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