modularize colorscheming and more

modules/hledger.nix

@@ -0,0 +1,44 @@
+{ config, lib, pkgs, ... }:
+with lib;
+let
+  cfg = config.niveum.hledger;
+in {
+  options.niveum.hledger = {
+    enable = mkEnableOption "hledger";
+    server = {
+      enable = mkEnableOption "hledger server";
+      port = mkOption { type = pkgs.unstable.lib.types.port; default = 5000; };
+      host = mkOption { type = types.str; default = "127.0.0.1"; };
+      capabilities = mkOption {
+        type = types.listOf (types.enum ["view" "add" "manage"]);
+        default = [ "view" "add" ];
+      };
+      flags = mkOption { type = types.listOf types.str; default = []; };
+      user = mkOption { type = types.attrs; };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ pkgs.unstable.hledger ];
+
+    systemd.services.hledger-web = mkIf cfg.server.enable {
+      description = "hledger server";
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Restart = "always";
+        ExecStart = ''
+          ${pkgs.unstable.hledger-web}/bin/hledger-web \
+            --port=${toString cfg.server.port} \
+            --host=${cfg.server.host} \
+            --capabilities=${concatStringsSep "," cfg.server.capabilities} \
+            ${concatStringsSep " " cfg.server.flags}
+        '';
+        User = cfg.server.user.name;
+        PrivateTemp = true;
+        RuntimeDirectory = "hledger-web";
+        WorkingDirectory = "%t/hledger-web";
+      };
+    };
+  };
+}