From 53ae6af491e6c1be31d2786d1908b87c1bb1267b Mon Sep 17 00:00:00 2001
From: Matthieu Daniel-Thomas <matthieu.daniel-thomas@cea.fr>
Date: Thu, 7 Nov 2024 09:23:18 +0100
Subject: [PATCH] nixos/phoebus: add modules

Add the possibility to enable phoebus in a nixos configuration
Add the possibility to edit java_opts
---
 nixos/module-list.nix            |  1 +
 nixos/modules/phoebus/client.nix | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 nixos/modules/phoebus/client.nix

diff --git a/nixos/module-list.nix b/nixos/module-list.nix
index 399e1d06..5daef8a4 100644
--- a/nixos/module-list.nix
+++ b/nixos/module-list.nix
@@ -7,4 +7,5 @@
   ./modules/phoebus/alarm-server.nix
   ./modules/phoebus/olog.nix
   ./modules/phoebus/save-and-restore.nix
+  ./modules/phoebus/client.nix
 ]
diff --git a/nixos/modules/phoebus/client.nix b/nixos/modules/phoebus/client.nix
new file mode 100644
index 00000000..de7b683c
--- /dev/null
+++ b/nixos/modules/phoebus/client.nix
@@ -0,0 +1,27 @@
+{
+  config,
+  lib,
+  epnix,
+  pkgs,
+  ...
+}: let
+  cfg = config.programs.phoebus-client;
+  pkg = pkgs.epnix.phoebus.override {java_opts = cfg.java_opts;};
+in {
+  options.programs.phoebus-client = {
+    enable = lib.mkEnableOption ''Enable the Phoebus client'';
+    java_opts = lib.mkOption {
+      type = lib.types.str;
+      default = "-XX:MinHeapSize=128m -XX:MaxHeapSize=4g -XX:InitialHeapSize=1g -XX:MaxHeapFreeRatio=10 -XX:MinHeapFreeRatio=5 -XX:-ShrinkHeapInSteps -XX:NativeMemoryTracking=detail";
+      example = "-XX:MinHeapSize=128m -XX:MaxHeapSize=4g -XX:InitialHeapSize=1g";
+      description = ''
+        This wrapper for the `phoebus-unwrapped` executable sets the `JAVA_OPTS`
+        environment variable with the provided `java_opts` value.
+      '';
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = [pkg];
+  };
+}