86 lines
2.5 KiB
Nix
86 lines
2.5 KiB
Nix
{ config, lib, pkgs, extendModules, noUserModules, ... }:
|
|
|
|
let
|
|
inherit (lib)
|
|
concatStringsSep
|
|
mapAttrs
|
|
mapAttrsToList
|
|
mkOption
|
|
types
|
|
;
|
|
|
|
# This attribute is responsible for creating boot entries for
|
|
# child configuration. They are only (directly) accessible
|
|
# when the parent configuration is boot default. For example,
|
|
# you can provide an easy way to boot the same configuration
|
|
# as you use, but with another kernel
|
|
# !!! fix this
|
|
children =
|
|
mapAttrs
|
|
(childName: childConfig: childConfig.configuration.system.build.toplevel)
|
|
config.specialisation;
|
|
|
|
in
|
|
{
|
|
options = {
|
|
|
|
specialisation = mkOption {
|
|
default = { };
|
|
example = lib.literalExpression "{ fewJobsManyCores.configuration = { nix.settings = { core = 0; max-jobs = 1; }; }; }";
|
|
description = lib.mdDoc ''
|
|
Additional configurations to build. If
|
|
`inheritParentConfig` is true, the system
|
|
will be based on the overall system configuration.
|
|
|
|
To switch to a specialised configuration
|
|
(e.g. `fewJobsManyCores`) at runtime, run:
|
|
|
|
```
|
|
sudo /run/current-system/specialisation/fewJobsManyCores/bin/switch-to-configuration test
|
|
```
|
|
'';
|
|
type = types.attrsOf (types.submodule (
|
|
local@{ ... }:
|
|
let
|
|
extend =
|
|
if local.config.inheritParentConfig
|
|
then extendModules
|
|
else noUserModules.extendModules;
|
|
in
|
|
{
|
|
options.inheritParentConfig = mkOption {
|
|
type = types.bool;
|
|
default = true;
|
|
description = lib.mdDoc "Include the entire system's configuration. Set to false to make a completely differently configured system.";
|
|
};
|
|
|
|
options.configuration = mkOption {
|
|
default = { };
|
|
description = lib.mdDoc ''
|
|
Arbitrary NixOS configuration.
|
|
|
|
Anything you can add to a normal NixOS configuration, you can add
|
|
here, including imports and config values, although nested
|
|
specialisations will be ignored.
|
|
'';
|
|
visible = "shallow";
|
|
inherit (extend { modules = [ ./no-clone.nix ]; }) type;
|
|
};
|
|
}
|
|
));
|
|
};
|
|
|
|
};
|
|
|
|
config = {
|
|
system.systemBuilderCommands = ''
|
|
mkdir $out/specialisation
|
|
${concatStringsSep "\n"
|
|
(mapAttrsToList (name: path: "ln -s ${path} $out/specialisation/${name}") children)}
|
|
'';
|
|
};
|
|
|
|
# uses extendModules to generate a type
|
|
meta.buildDocsInSandbox = false;
|
|
}
|