From 28875192ae411f6a44ac4f4392928b65005d11aa Mon Sep 17 00:00:00 2001
From: Herwig Hochleitner <herwig@bendlas.net>
Date: Fri, 9 Feb 2018 23:13:38 +0100
Subject: [PATCH] programs.systemtap: add nixos option for installing systemtap

also enables debug feature on kernel
---
 nixos/modules/module-list.nix        |  1 +
 nixos/modules/programs/systemtap.nix | 28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)
 create mode 100644 nixos/modules/programs/systemtap.nix

diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index 751465c96937..35f5e87d7e5e 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -104,6 +104,7 @@
   ./programs/ssh.nix
   ./programs/ssmtp.nix
   ./programs/sysdig.nix
+  ./programs/systemtap.nix
   ./programs/sway.nix
   ./programs/thefuck.nix
   ./programs/tmux.nix
diff --git a/nixos/modules/programs/systemtap.nix b/nixos/modules/programs/systemtap.nix
new file mode 100644
index 000000000000..fd84732cd412
--- /dev/null
+++ b/nixos/modules/programs/systemtap.nix
@@ -0,0 +1,28 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let cfg = config.programs.systemtap;
+in {
+
+  options = {
+    programs.systemtap = {
+      enable = mkOption {
+        default = false;
+        description = ''
+          Install <command>systemtap</command> along with necessary kernel options.
+        '';
+      };
+    };
+  };
+  config = mkIf cfg.enable {
+    system.requiredKernelConfig = with config.lib.kernelConfig; [
+      (isYes "DEBUG")
+    ];
+    boot.kernel.features.debug = true;
+    environment.systemPackages = [
+      config.boot.kernelPackages.systemtap
+    ];
+  };
+
+}