From dbfc6c72699827187ea550f1335e8705b5744322 Mon Sep 17 00:00:00 2001
From: Claude <noreply@anthropic.com>
Date: Wed, 19 Nov 2025 10:36:50 +0000
Subject: [PATCH] Add templateFile option to Nix module

Allows users to specify a custom post.gohtml template file for formatting
RSS feed posts. The template file is copied to the service's state directory
at /var/lib/rssbot and the bot runs from that directory so it can find the
template.

- Added templateFile option (nullable path)
- Added StateDirectory and WorkingDirectory to systemd service config
- Added preStart hook to copy custom template when specified
---
 module.nix | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/module.nix b/module.nix
index df80edb..857cd55 100644
--- a/module.nix
+++ b/module.nix
@@ -41,12 +41,11 @@ in
       description = "File containing Telegram Bot Token";
     };
 
-    # TODO: Find a way to load a custom post.gohtml
-    # template = mkOption {
-    #   type = types.nullOr types.lines;
-    #   default = null;
-    #   description = "Custom post.gohtml template content";
-    # };
+    templateFile = mkOption {
+      type = types.nullOr types.path;
+      default = null;
+      description = "Path to a custom post.gohtml template file";
+    };
 
     database = {
       host = lib.mkOption {
@@ -129,6 +128,10 @@ in
       requires = [ "network-online.target" "mysql.service" ];
       wantedBy = [ "multi-user.target" ];
 
+      preStart = optionalString (cfg.templateFile != null) ''
+        cp ${cfg.templateFile} $STATE_DIRECTORY/post.gohtml
+      '';
+
       script = ''
         export BOT_TOKEN="$(< $CREDENTIALS_DIRECTORY/BOT_TOKEN )"
         ${optionalString (cfg.database.passwordFile != null) ''
@@ -143,6 +146,8 @@ in
           "BOT_TOKEN:${cfg.botTokenFile}"
         ] ++ optional (cfg.database.passwordFile != null) "MYSQL_PASSWORD:${cfg.database.passwordFile}";
 
+        StateDirectory = "rssbot";
+        WorkingDirectory = "/var/lib/rssbot";
         Restart = "always";
         User = cfg.user;
         Group = defaultUser;