log panics to a file

Cargo.lock

@@ -156,6 +156,12 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc7eb209b1518d6bb87b283c20095f5228ecda460da70b44f0802523dea6da04"
 
+[[package]]
+name = "android-tzdata"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
+
 [[package]]
 name = "android_system_properties"
 version = "0.1.5"
@@ -596,6 +602,20 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "chrono"
+version = "0.4.40"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a7964611d71df112cb1730f2ee67324fcf4d0fc6606acbbe9bfe06df124637c"
+dependencies = [
+ "android-tzdata",
+ "iana-time-zone",
+ "js-sys",
+ "num-traits",
+ "wasm-bindgen",
+ "windows-link",
+]
+
 [[package]]
 name = "clipboard-win"
 version = "5.4.0"
@@ -1369,6 +1389,7 @@ name = "gta-tools"
 version = "0.4.0"
 dependencies = [
  "catppuccin-egui",
+ "chrono",
  "dirs",
  "eframe",
  "egui_extras",
@@ -1426,6 +1447,30 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.63"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0c919e5debc312ad217002b8048a17b7d83f80703865bbfcfebb0458b0b27d8"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "log",
+ "wasm-bindgen",
+ "windows-core 0.61.0",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "icu_collections"
 version = "1.5.0"

Cargo.toml

@@ -7,6 +7,7 @@ edition = "2024"
 catppuccin-egui = { version = "5.5.0", default-features = false, features = [
     "egui31",
 ] }
+chrono = "0.4.40"
 dirs = "6.0.0"
 eframe = "0.31.1"
 egui_extras = { version = "0.31.1", features = ["image"] }

src/gui/mod.rs

@@ -9,11 +9,15 @@ use crate::{
     gui::{persistent_state::PersistentState, settings::Settings},
     util::{
         self,
-        consts::{ENHANCED, GTA_WINDOW_TITLE, LEGACY},
+        consts::{APP_STORAGE_PATH, ENHANCED, GTA_WINDOW_TITLE, LEGACY},
     },
 };
 use eframe::egui;
-use std::time::{Duration, Instant};
+use std::{
+    fs,
+    io::Write,
+    time::{Duration, Instant},
+};
 
 const WINDOW_SIZE: [f32; 2] = [240.0, 245.0];
 
@@ -370,10 +374,24 @@ fn load_icon() -> egui::IconData {
     }
 }
 
+fn panic_hook(panic_info: &std::panic::PanicHookInfo<'_>) {
+    let log_path = APP_STORAGE_PATH.join("panic.log");
+    let mut file = fs::File::options()
+        .create(true)
+        .append(true)
+        .open(log_path)
+        .unwrap();
+    let timestamp = chrono::Local::now().to_rfc3339();
+    let backtrace = std::backtrace::Backtrace::force_capture();
+    let message = format!("[{timestamp}]\n{panic_info}\n\n{backtrace}\n\n");
+    file.write_all(message.as_bytes()).unwrap();
+}
+
 #[allow(clippy::unnecessary_wraps)]
 fn app_creator(
     cc: &eframe::CreationContext<'_>,
 ) -> Result<Box<dyn eframe::App>, Box<dyn std::error::Error + Send + Sync>> {
+    std::panic::set_hook(Box::new(panic_hook));
     let mut app = Box::<App>::default();
     if let Some(persistent_state) = PersistentState::get() {
         app.launch.selected = persistent_state.launcher;

src/gui/persistent_state.rs

@@ -1,4 +1,4 @@
-use crate::{features::launch::Platform, gui::settings::Settings};
+use crate::{features::launch::Platform, gui::settings::Settings, util::consts::APP_STORAGE_PATH};
 use serde::{Deserialize, Serialize};
 use std::{
     fs::{self, File},
@@ -7,12 +7,7 @@ use std::{
     sync::LazyLock,
 };
 
-static CONFIG_PATH: LazyLock<PathBuf> = LazyLock::new(|| {
-    dirs::config_local_dir()
-        .unwrap()
-        .join("GTA Tools")
-        .join("config.json")
-});
+static CONFIG_PATH: LazyLock<PathBuf> = LazyLock::new(|| APP_STORAGE_PATH.join("config.json"));
 
 #[derive(Serialize, Deserialize)]
 pub struct PersistentState {

src/util/consts.rs

@@ -1,4 +1,9 @@
+use std::{path::PathBuf, sync::LazyLock};
+
 pub const ENHANCED: &str = "GTA5_Enhanced.exe";
 pub const LEGACY: &str = "GTA5.exe";
 
 pub const GTA_WINDOW_TITLE: &str = "Grand Theft Auto V";
+
+pub static APP_STORAGE_PATH: LazyLock<PathBuf> =
+    LazyLock::new(|| dirs::config_local_dir().unwrap().join("GTA Tools"));