nixos/hound: restart service on changes (#377611)

Author: fpletz

nixos/modules/services/search/hound.nix

@@ -7,6 +7,13 @@
 let
   cfg = config.services.hound;
   settingsFormat = pkgs.formats.json { };
+  houndConfigFile = pkgs.writeTextFile {
+    name = "hound-config.json";
+    text = builtins.toJSON cfg.settings;
+    checkPhase = ''
+      ${cfg.package}/bin/houndd -check-conf -conf $out
+    '';
+  };
 in
 {
   imports = [
@@ -96,13 +103,7 @@ in
       };
     };
 
-    environment.etc."hound/config.json".source = pkgs.writeTextFile {
-      name = "hound-config";
-      text = builtins.toJSON cfg.settings;
-      checkPhase = ''
-        ${cfg.package}/bin/houndd -check-conf -conf $out
-      '';
-    };
+    environment.etc."hound/config.json".source = houndConfigFile;
 
     services.hound.settings = {
       dbpath = "${config.services.hound.home}/data";
@@ -112,6 +113,7 @@ in
       description = "Hound Code Search";
       wantedBy = [ "multi-user.target" ];
       after = [ "network.target" ];
+      restartTriggers = [ houndConfigFile ];
       serviceConfig = {
         User = cfg.user;
         Group = cfg.group;

nixos/tests/hound.nix

@@ -11,17 +11,15 @@ import ./make-test-python.nix (
       {
         services.hound = {
           enable = true;
-          config = ''
-            {
-              "max-concurrent-indexers": 1,
-              "dbpath": "/var/lib/hound/data",
-              "repos": {
-                "nix": {
-                  "url": "file:///var/lib/hound/my-git"
-                }
-              }
-            }
-          '';
+          settings = {
+            "max-concurrent-indexers" = 1;
+            "dbpath" = "/var/lib/hound/data";
+            "repos" = {
+              "nix" = {
+                "url" = "file:///var/lib/hound/my-git";
+              };
+            };
+          };
         };
 
         systemd.services.houndseed = {