nixbld-etc-nixos/configuration.nix

@@ -205,7 +205,7 @@ ACTION=="add", SUBSYSTEM=="tty", \
       "lab.m-labs.hk" = {
         addSSL = true;
         useACMEHost = "nixbld.m-labs.hk";
-        locations."/homu/".proxyPass = "http://127.0.0.1:54856/";
+        locations."/".proxyPass = "http://192.168.1.100";
       };
       "nixbld.m-labs.hk" = {
         forceSSL = true;
@@ -245,10 +245,16 @@ ACTION=="add", SUBSYSTEM=="tty", \
     };
   };
 
-  services.homu = {
-    enable = true;
-    config = "/etc/nixos/secret/homu.toml";
-  };
+  # services.homu = {
+  #   enable = true;
+  #   # See https://github.com/servo/homu/blob/master/cfg.sample.toml
+  #   config = {
+  #     max_priority = 9001;
+  #     github = {
+  #       access_token = "...";
+  #     };
+  #   };
+  # };
 
   # This value determines the NixOS release with which your system is to be
   # compatible, in order to avoid breaking some software such as database

nixbld-etc-nixos/homu/nixos-module.nix

@@ -2,7 +2,40 @@
 with lib;
 let
   homu = pkgs.callPackage ./pkg.nix {};
+
+  toToml = key: value:
+    let valueString =
+      if builtins.isString value
+      then "\"" + (builtins.replaceStrings ["\"" "\\"] ["\\\"" "\\\\"] value) + "\""
+      else toString value;
+    in "${key} = ${valueString}\n";
+
+  defaultConfig = {
+    db = {
+      file = "/var/db/homu/main.db";
+    };
+  };
   cfg = config.services.homu;
+  homuConfig = defaultConfig // cfg.config;
+  configFilter = f:
+    filterAttrs (key: value: f value) homuConfig;
+  topLevelConfig =
+    configFilter (value: ! builtins.isAttrs value);
+  configSections =
+    configFilter (value: builtins.isAttrs value);
+
+  configFile = builtins.toFile "config.toml" (
+    builtins.concatStringsSep "" (
+      (attrsets.mapAttrsToList toToml topLevelConfig) ++
+      (builtins.concatLists (attrsets.mapAttrsToList
+        (sectionName: sectionConfig:
+          [ "[${sectionName}]\n" ] ++
+          (attrsets.mapAttrsToList toToml sectionConfig)
+        ) configSections)
+      ))
+  );
+
+  dbDir = dirOf homuConfig.db.file;
 in
 
 {
@@ -12,21 +45,16 @@ in
       default = false;
       description = "Enable the bot";
     };
-    dbDir = mkOption {
-      type = types.str;
-      default = "/var/db/homu";
-      description = "Path to the database file (use the same path in config.toml)";
-    };
     config = mkOption {
-      description = "Location of config.toml";
-      type = types.str;
+      description = "Structured data for config.toml";
+      type = with types; attrsOf unspecified;
     };
   };
 
   config = mkIf cfg.enable {
     users.users.homu = {
       group = "homu";
-      home = cfg.dbDir;
+      home = dbDir;
       createHome = true;
     };
     users.groups.homu = {};
@@ -37,7 +65,7 @@ in
       after    = [ "network.target" ];
       serviceConfig = {
         Type = "simple";
-        ExecStart = "${homu}/bin/homu -c ${cfg.config}";
+        ExecStart = "${homu}/bin/homu -c ${configFile}";
 
         Restart = "always";
         RestartSec = "5sec";