1 files changed, 74 insertions, 0 deletions
diff --git a/nixos/modules/services/misc/folding-at-home.nix b/nixos/modules/services/misc/folding-at-home.nix
new file mode 100644
index 00000000000..9f4c4645279
--- /dev/null
+++ b/nixos/modules/services/misc/folding-at-home.nix
@@ -0,0 +1,74 @@
+{ config, pkgs, ... }:
+with pkgs.lib;
+let
+  stateDir = "/var/lib/foldingathome";
+  cfg = config.services.foldingAtHome;
+  fahUser = "foldingathome";
+in {
+
+  ###### interface
+
+  options = {
+
+    services.foldingAtHome = {
+
+      enable = mkOption {
+        default = false;
+        description = ''
+          Whether to enable the Folding@Home to use idle CPU time.
+        '';
+      };
+
+      nickname = mkOption {
+        default = "Anonymous";
+        description = ''
+          A unique handle for statistics.
+        '';
+      };
+
+      config = mkOption {
+        default = "";
+        description = ''
+          Extra configuration. Contents will be added verbatim to the
+          configuration file.
+        '';
+      };
+
+    };
+
+  };
+
+  ###### implementation
+
+  config = mkIf cfg.enable {
+
+    users.extraUsers = singleton
+      { name = fahUser;
+        uid = config.ids.uids.foldingAtHome;
+        description = "Folding@Home user";
+        home = stateDir;
+      };
+
+    jobs.foldingAtHome =
+      { name = "foldingathome";
+
+        startOn = "started network-interfaces";
+        stopOn = "stopping network-interfaces";
+
+        preStart =
+          ''
+            mkdir -m 0755 -p ${stateDir}
+            chown ${fahUser} ${stateDir}
+            cp -f ${pkgs.writeText "client.cfg" cfg.config} ${stateDir}/client.cfg
+          '';
+        exec = "${pkgs.su}/bin/su -s ${pkgs.stdenv.shell} ${fahUser} -c 'cd ${stateDir}; ${pkgs.foldingathome}/bin/fah6'";
+      };
+
+      services.foldingAtHome.config = ''
+          [settings]
+          username=${cfg.nickname}
+      '';
+
+  };
+
+}