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