track the source of the preferences

src/var.rs

@@ -15,7 +15,6 @@ use bevy::prelude::*;
 use std::collections::HashMap;
 use serde::Deserialize;
 use toml_edit::DocumentMut;
-use toml_edit::de::from_document;
 use std::env;
 use std::fs;
 
@@ -37,6 +36,9 @@ pub struct Preferences {
     pub fullscreen_mode: String,
     pub window_mode: String,
     pub render_mode: String,
+
+    #[serde(skip)]
+    pub source_file: Option<String>,
 }
 
 impl Default for Preferences {
@@ -45,6 +47,7 @@ impl Default for Preferences {
             fullscreen_mode: "borderless".to_string(),
             window_mode: "fullscreen".to_string(),
             render_mode: "vulkan".to_string(),
+            source_file: None,
         }
     }
 }
@@ -90,9 +93,10 @@ pub fn load_prefs() -> Preferences {
     };
     match toml.parse::<DocumentMut>() {
         Ok(doc) => {
-            match from_document::<Preferences>(doc) {
-                Ok(pref) => {
+            match toml_edit::de::from_document::<Preferences>(doc) {
+                Ok(mut pref) => {
                     info!("Loaded preference file from {prefs_path}");
+                    pref.source_file = Some(prefs_path);
                     dbg!(&pref);
                     return pref;
                 }