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# this is the
# Upower daemon.
# module from nixpkgs, but with the option to suspend and less configuration
{ config, lib, pkgs, ... }:
let
cfg = config.vuizvui.services.upower;
ini = pkgs.formats.ini {};
pkg = pkgs.upower.overrideAttrs (old: {
patches = [
# Adds a "Suspend" action to what to do when the battery is critical
(pkgs.fetchpatch {
url = "https://gitlab.freedesktop.org/upower/upower/-/merge_requests/11.patch";
sha256 = "sha256-y8ysD+fJIi5SZkWp2n061VBA5cs1EMftOof/h2tvDGo=";
})
];
});
configFile = ini.generate "UPower.conf" cfg.settings;
in
{
###### interface
options = {
vuizvui.services.upower = {
enable = lib.mkOption {
type = lib.types.bool;
default = false;
description = ''
Whether to enable Upower, a DBus service that provides power
management support to applications.
'';
};
settings = lib.mkOption {
type = lib.types.nullOr ini.type;
default = {};
description = ''
The upower configuration.
So far it looks like there is always only one Section called <literal>UPower</literal>
'';
example = {
UPower = {
TimeCritical = 300;
CriticalPowerAction = "Hibernate";
};
};
};
};
};
###### implementation
config = lib.mkIf cfg.enable {
# this is … questionable … l o w e f f o r t
environment.systemPackages = [ pkg ];
services.dbus.packages = [ pkg ];
services.udev.packages = [ pkg ];
systemd.packages = [ pkg ];
# this implicitly assumes the package has a `upower.service` unit file
systemd.services."upower".restartTriggers = [ configFile ];
environment.etc."UPower/UPower.conf".source = configFile ;
};
}
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