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nixos/monado: add forceDefaultRuntime option

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This option replaces the active runtime manifest in the user directory.
Games running through Steam's Pressure Vessel cannot read /etc so
forcefully overriding the file every time the service starts, will allow
those games to use Monado.

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>
This commit is contained in:
Sefa Eyeoglu 2024-10-15 17:33:11 +02:00
parent 969ad19f9d
commit 91fee43100
No known key found for this signature in database
GPG Key ID: E13DFD4B47127951
2 changed files with 34 additions and 2 deletions
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26
nixos/modules/services/hardware/monado.nix
View File

@ -16,6 +16,7 @@ let
cfg = config.services.monado;
runtimeManifest = "${cfg.package}/share/openxr/1/openxr_monado.json";
in
{
options.services.monado = {
@ -35,6 +36,19 @@ in
example = true;
};
forceDefaultRuntime = mkOption {
type = types.bool;
description = ''
Whether to ensure that Monado is the active runtime set for the current
user.
This replaces the file `XDG_CONFIG_HOME/openxr/1/active_runtime.json`
when starting the service.
'';
default = false;
example = true;
};
highPriority =
mkEnableOption "high priority capability for monado-service"
// mkOption { default = true; };
@ -68,6 +82,16 @@ in
IPC_EXIT_ON_DISCONNECT = mkDefault "off";
};
preStart = mkIf cfg.forceDefaultRuntime ''
XDG_CONFIG_HOME="''${XDG_CONFIG_HOME:-$HOME/.config}"
targetDir="$XDG_CONFIG_HOME/openxr/1"
activeRuntimePath="$targetDir/active_runtime.json"
echo "Note: Replacing active runtime at '$activeRuntimePath'"
mkdir --parents "$targetDir"
ln --symbolic --force ${runtimeManifest} "$activeRuntimePath"
'';
serviceConfig = {
ExecStart =
if cfg.highPriority then
@ -106,7 +130,7 @@ in
hardware.graphics.extraPackages = [ pkgs.monado-vulkan-layers ];
environment.etc."xdg/openxr/1/active_runtime.json" = mkIf cfg.defaultRuntime {
source = "${cfg.package}/share/openxr/1/openxr_monado.json";
source = runtimeManifest;
};
};

10
nixos/tests/monado.nix
View File

@ -1,5 +1,5 @@
import ./make-test-python.nix (
{ pkgs, ... }:
{ ... }:
{
name = "monado";
@ -16,6 +16,8 @@ import ./make-test-python.nix (
services.monado = {
enable = true;
defaultRuntime = true;
forceDefaultRuntime = true;
};
# Stop Monado from probing for any hardware
systemd.user.services.monado.environment.SIMULATED_ENABLE = "1";
@ -30,6 +32,9 @@ import ./make-test-python.nix (
runtimePath = "/run/user/${userId}";
in
''
# for defaultRuntime
machine.succeed("stat /etc/xdg/openxr/1/active_runtime.json")
machine.succeed("loginctl enable-linger alice")
machine.wait_for_unit("user@${userId}.service")
@ -37,6 +42,9 @@ import ./make-test-python.nix (
machine.systemctl("start monado.service", "alice")
machine.wait_for_unit("monado.service", "alice")
# for forceDefaultRuntime
machine.succeed("stat /home/alice/.config/openxr/1/active_runtime.json")
machine.succeed("su -- alice -c env XDG_RUNTIME_DIR=${runtimePath} openxr_runtime_list")
'';
}