1 files changed, 43 insertions, 0 deletions
diff --git a/pkgs/applications/window-managers/sway/assign-cgroups.nix b/pkgs/applications/window-managers/sway/assign-cgroups.nix
new file mode 100644
index 000000000000..c6029de3ee80
--- /dev/null
+++ b/pkgs/applications/window-managers/sway/assign-cgroups.nix
@@ -0,0 +1,43 @@
+{ lib
+, fetchFromGitHub
+, python3Packages
+}:
+
+python3Packages.buildPythonApplication rec {
+  pname = "assign-cgroups";
+  version = "0.4.0";
+  src = fetchFromGitHub {
+    owner = "alebastr";
+    repo = "sway-systemd";
+    rev = "v${version}";
+    sha256 = "sha256-wznYE1/lVJtvf5Nq96gbPYisxc2gWLahVydwcH1vwoQ=";
+  };
+  format = "other";
+
+  propagatedBuildInputs = with python3Packages; [ dbus-next i3ipc psutil tenacity xlib ];
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out/bin
+    cp src/assign-cgroups.py $out/bin/
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Place GUI applications into systemd scopes for systemd-oomd compatibility.";
+    longDescription = ''
+      Automatically assign a dedicated systemd scope to the GUI applications
+      launched in the same cgroup as the compositor. This could be helpful for
+      implementing cgroup-based resource management and would be necessary when
+      `systemd-oomd` is in use.
+
+      Limitations: The script is using i3ipc window:new event to detect application
+      launches and would fail to detect background apps or special surfaces.
+      Therefore it's recommended to supplement the script with use of systemd user
+      services for such background apps.
+    '';
+    license = licenses.mit;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ nickhu ];
+  };
+}