k 3: add htgen

krebs/3modules/default.nix

@@ -20,6 +20,7 @@ let
       ./github-hosts-sync.nix
       ./git.nix
       ./go.nix
+      ./htgen.nix
       ./iptables.nix
       ./kapacitor.nix
       ./monit.nix

krebs/3modules/htgen.nix

@@ -0,0 +1,68 @@
+{ config, lib, pkgs, ... }:
+
+with import <stockholm/lib>;
+let
+  cfg = config.krebs.htgen;
+
+  out = {
+    options.krebs.htgen = api;
+    config = imp;
+  };
+
+  api = mkOption {
+    type = types.attrsOf (types.submodule ({ config, ... }: {
+      options = {
+        enable = mkEnableOption "krebs.htgen-${config.name}";
+
+        name = mkOption {
+          type = types.username;
+          default = config._module.args.name;
+        };
+
+        port = mkOption {
+          type = types.uint;
+        };
+
+        script = mkOption {
+          type = types.str;
+        };
+        user = mkOption {
+          type = types.user;
+          default = {
+            name = "htgen-${config.name}";
+            home = "/var/lib/htgen-${config.name}";
+          };
+        };
+      };
+    }));
+  };
+  imp = {
+
+    systemd.services = mapAttrs' (name: htgen:
+      nameValuePair "htgen-${name}" {
+        wantedBy = [ "multi-user.target" ];
+        after = [ "network.target" ];
+        environment = {
+          HTGEN_PORT = toString htgen.port;
+        };
+        serviceConfig = {
+          SyslogIdentifier = "htgen";
+          User = htgen.user.name;
+          PrivateTmp = true;
+          Restart = "always";
+          ExecStart = "${pkgs.htgen.override {
+            inherit (htgen) script;
+          }}/bin/htgen --serve";
+        };
+      }
+    ) cfg;
+
+    users.users = mapAttrs' (name: htgen:
+      nameValuePair htgen.user.name {
+        inherit (htgen.user) home name uid;
+        createHome = true;
+      }
+    ) cfg;
+
+  };
+in out