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home-manager/modules/services/grobi.nix
polykernel c7592b747b
treewide: prefer XDG variables over dot directories
Currently, dot directories and XDG base directories are used
inconsistently in the Home Manager option declarations. This creates
ambiguity for the user as to where the location of the file should be
albeit this is rarely encountered in practice as it is sufficient to
read upstream documentation. The rationale is to make declarations
consistent and make a clear distinction between hardcoded and modular
specifications.

References to ~/.config in relevant nixpkgs modules were untouched as
the location is hardcoded upstream[1]. Furthermore, modules of
programs which do not follow XDG specifications were also untouched.

Generalization of tilde(~) expansions to $HOME were also considered,
however there isn't sufficient rationale despite the use of $HOME
being more universal. The expansion is standardized in POSIX[2] and is
essentially portable across all shells, thus there is no pragmatic
value to introducing the change.

[1] https://github.com/nixos/nixpkgs/blob/master/pkgs/top-level/impure.nix
[2] https://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_06_01
2021-12-10 23:51:44 +01:00

102 lines
3 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.grobi;
eitherStrBoolIntList = with types;
either str (either bool (either int (listOf str)));
in {
meta.maintainers = [ maintainers.mbrgm ];
options = {
services.grobi = {
enable = mkEnableOption "the grobi display setup daemon";
executeAfter = mkOption {
type = with types; listOf str;
default = [ ];
example = [ "setxkbmap dvorak" ];
description = ''
Commands to be run after an output configuration was
changed. The Nix value declared here will be translated to
JSON and written to the <option>execute_after</option> key
in <filename>$XDG_CONFIG_HOME/grobi.conf</filename>.
'';
};
rules = mkOption {
type = with types; listOf (attrsOf eitherStrBoolIntList);
default = [ ];
example = literalExpression ''
[
{
name = "Home";
outputs_connected = [ "DP-2" ];
configure_single = "DP-2";
primary = true;
atomic = true;
execute_after = [
"${pkgs.xorg.xrandr}/bin/xrandr --dpi 96"
"${pkgs.xmonad-with-packages}/bin/xmonad --restart";
];
}
{
name = "Mobile";
outputs_disconnected = [ "DP-2" ];
configure_single = "eDP-1";
primary = true;
atomic = true;
execute_after = [
"${pkgs.xorg.xrandr}/bin/xrandr --dpi 120"
"${pkgs.xmonad-with-packages}/bin/xmonad --restart";
];
}
]
'';
description = ''
These are the rules grobi tries to match to the current
output configuration. The rules are evaluated top to bottom,
the first matching rule is applied and processing stops. See
<link xlink:href="https://github.com/fd0/grobi/blob/master/doc/grobi.conf"/>
for more information. The Nix value declared here will be
translated to JSON and written to the <option>rules</option>
key in <filename>$XDG_CONFIG_HOME/grobi.conf</filename>.
'';
};
};
};
config = mkIf cfg.enable {
assertions = [
(lib.hm.assertions.assertPlatform "services.grobi" pkgs
lib.platforms.linux)
];
systemd.user.services.grobi = {
Unit = {
Description = "grobi display auto config daemon";
After = [ "graphical-session-pre.target" ];
PartOf = [ "graphical-session.target" ];
};
Service = {
Type = "simple";
ExecStart = "${pkgs.grobi}/bin/grobi watch -v";
Restart = "always";
RestartSec = "2s";
Environment = "PATH=${pkgs.xorg.xrandr}/bin:${pkgs.bash}/bin";
};
Install = { WantedBy = [ "graphical-session.target" ]; };
};
xdg.configFile."grobi.conf".text = builtins.toJSON {
execute_after = cfg.executeAfter;
rules = cfg.rules;
};
};
}