1 files changed, 68 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/services/misc/folding-at-home.nix b/nixpkgs/nixos/modules/services/misc/folding-at-home.nix
new file mode 100644
index 00000000000..122c89ce068
--- /dev/null
+++ b/nixpkgs/nixos/modules/services/misc/folding-at-home.nix
@@ -0,0 +1,68 @@
+{ config, lib, pkgs, ... }:
+with 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.users = singleton
+      { name = fahUser;
+        uid = config.ids.uids.foldingathome;
+        description = "Folding@Home user";
+        home = stateDir;
+      };
+
+    systemd.services.foldingathome = {
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      preStart = ''
+        mkdir -m 0755 -p ${stateDir}
+        chown ${fahUser} ${stateDir}
+        cp -f ${pkgs.writeText "client.cfg" cfg.config} ${stateDir}/client.cfg
+      '';
+      script = "${pkgs.su}/bin/su -s ${pkgs.runtimeShell} ${fahUser} -c 'cd ${stateDir}; ${pkgs.foldingathome}/bin/fah6'";
+    };
+
+    services.foldingAtHome.config = ''
+        [settings]
+        username=${cfg.nickname}
+    '';
+  };
+}