nix-dotfiles/modules/machineVars.nix

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{ lib, config, ... }:
let
inherit (lib) types mkEnableOption mkOption mkIf;
cfg = config.machineVars;
in {
options.machineVars = {
headless = mkEnableOption "Whether or not the machine should have graphical output.";
screens = mkOption {
type = types.attrsOf (types.submodule ( { name, ...}: {
options = {
name = mkOption {
type = types.str;
default = name;
example = "DP-1";
description = "The name of the screen";
};
primary = mkEnableOption "Whether this screen should be the primary one. There can only be one primary screen";
resolution = mkOption {
type = types.str;
example = "3840x2160";
default = "1920x1080";
description = "The resolution of the screen";
};
frequency = mkOption {
type = types.ints.positive;
example = 144;
default = 60;
description = "The update frequency of the screen, defined in Hz";
};
position = mkOption {
type = types.str;
example = "1920x0";
default = "0x0";
description = "The position of the screen, compared to the other screens";
};
};
}));
default = { };
description = "A detailed description of the machines screens.";
};
gaming = mkEnableOption "Whether or not the machine should have gaming software installed.";
development = mkEnableOption "Whether or not the machine should come with developmen
t tools preinstalled.";
creative = mkEnableOption "Whether or not the machine should have creative software
(music, video and image editing) installed.";
wlanInterface = mkOption {
type = types.nullOr types.string;
default = null;
};
# Check " ls -1 /sys/class/power_supply/ "
battery = mkOption {
type = types.nullOr types.string;
default = null;
};
laptop = mkEnableOption "Whether the machine is a laptop";
fixDisplayCommand = mkOption {
type = types.nullOr types.str;
default = null;
};
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dataDrives = let
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driveType =
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types.path;
# types.addCheck types.path (path: builtins.elem path (builtins.attrNames config.fileSystems));
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in {
drives = mkOption {
type = types.attrsOf driveType;
default = { };
example = {
dataDrive1 = "/data/data1";
dataDrive2 = "/another/location";
};
description = ''
Drives that should act as data drives.
These need to be registered in `fileSystems`
'';
};
default = mkOption {
type = types.nullOr driveType;
description = ''
Data drive that should be used for most purposes.
'';
};
};
};
config = {
assertions = [
{
assertion = cfg.headless -> !cfg.creative;
message = "A headless machine can't have creative software installed.";
}
{
assertion = cfg.headless -> !cfg.gaming;
message = "A headless machine can't have gaming software installed.";
}
{
assertion = cfg.headless -> (cfg.screens == { } && cfg.fixDisplayCommand == null);
message = "A headless machine can't have any screens.";
}
{
assertion = cfg.battery != null -> cfg.laptop;
message = "A battery shouldn't exist on a non laptop machine";
}
# FIXME:
# {
# assertion = map () (cfg.screens)
# message = "There can only be one primary screen.";
# }
];
warnings = lib.optionals (0 < (lib.length (builtins.attrNames cfg.screens)) && (cfg.fixDisplayCommand != null)) [
"You are overriding the fixDisplayCommand even though machineVars.screens is defined. One of these should be omitted"
];
};
}