From 160e08d4a8ebf1664b25aa82f28acdec65f9adb8 Mon Sep 17 00:00:00 2001
From: megaproxy <megaproxy@gmail.com>
Date: Sat, 9 May 2026 16:03:40 +0100
Subject: [PATCH] Suppress console-window flash on subprocess spawn
 (CREATE_NO_WINDOW); bump 0.1.2

paths::quiet_command sets CREATE_NO_WINDOW (0x08000000) on Windows so
short-lived child processes (wsl.exe -l -q, where claude, wsl.exe -d X
bash -lc 'command -v claude') don't briefly allocate a real console
window and flash on click. Used by both paths.rs and cli_usage.rs.
---
 package.json               |  2 +-
 src-tauri/Cargo.toml       |  2 +-
 src-tauri/src/cli_usage.rs |  9 +++------
 src-tauri/src/paths.rs     | 19 ++++++++++++++++++-
 src-tauri/tauri.conf.json  |  2 +-
 5 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/package.json b/package.json
index 395c7af..fae27cd 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "claude-usage-widget",
   "private": true,
-  "version": "0.1.1",
+  "version": "0.1.2",
   "type": "module",
   "scripts": {
     "dev": "vite",
diff --git a/src-tauri/Cargo.toml b/src-tauri/Cargo.toml
index 350272a..019fe63 100644
--- a/src-tauri/Cargo.toml
+++ b/src-tauri/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "claude-usage-widget"
-version = "0.1.1"
+version = "0.1.2"
 description = "Always-on-top Windows widget visualizing local Claude Code usage"
 authors = ["megaproxy"]
 edition = "2021"
diff --git a/src-tauri/src/cli_usage.rs b/src-tauri/src/cli_usage.rs
index f0d6a7a..26287e6 100644
--- a/src-tauri/src/cli_usage.rs
+++ b/src-tauri/src/cli_usage.rs
@@ -114,9 +114,8 @@ pub fn autodetect_command() -> Option<Vec<String>> {
 }
 
 fn which_exists(name: &str) -> bool {
-    use std::process::Command;
     let probe = if cfg!(windows) { "where" } else { "which" };
-    Command::new(probe)
+    crate::paths::quiet_command(probe)
         .arg(name)
         .output()
         .map(|o| o.status.success() && !o.stdout.is_empty())
@@ -124,8 +123,7 @@ fn which_exists(name: &str) -> bool {
 }
 
 fn list_wsl_distros() -> Vec<String> {
-    use std::process::Command;
-    let Ok(out) = Command::new("wsl.exe").args(["-l", "-q"]).output() else {
+    let Ok(out) = crate::paths::quiet_command("wsl.exe").args(["-l", "-q"]).output() else {
         return Vec::new();
     };
     if !out.status.success() {
@@ -145,8 +143,7 @@ fn list_wsl_distros() -> Vec<String> {
 }
 
 fn probe_claude_in_wsl(distro: &str) -> bool {
-    use std::process::Command;
-    Command::new("wsl.exe")
+    crate::paths::quiet_command("wsl.exe")
         .args(["-d", distro, "bash", "-lc", "command -v claude"])
         .output()
         .map(|o| o.status.success() && !o.stdout.is_empty())
diff --git a/src-tauri/src/paths.rs b/src-tauri/src/paths.rs
index b8d8e6e..dbbea8b 100644
--- a/src-tauri/src/paths.rs
+++ b/src-tauri/src/paths.rs
@@ -10,6 +10,23 @@
 use serde::Serialize;
 use std::path::{Path, PathBuf};
 
+/// Construct a `Command` that won't flash a console window on Windows.
+///
+/// `Command::new(...).output()` allocates a console for the child process
+/// before it exits, which appears as a black flash for short-lived processes
+/// like `wsl.exe -l -q` or `where claude`. The CREATE_NO_WINDOW flag (Win32
+/// process-creation flag 0x08000000) suppresses that.
+pub fn quiet_command(program: &str) -> std::process::Command {
+    let mut c = std::process::Command::new(program);
+    #[cfg(windows)]
+    {
+        use std::os::windows::process::CommandExt;
+        const CREATE_NO_WINDOW: u32 = 0x08000000;
+        c.creation_flags(CREATE_NO_WINDOW);
+    }
+    c
+}
+
 #[derive(Debug, Clone, Serialize)]
 pub struct ResolvedRoots {
     pub roots: Vec<PathBuf>,
@@ -24,7 +41,7 @@ pub fn list_wsl_distros() -> anyhow::Result<Vec<String>> {
         return Ok(Vec::new());
     }
 
-    let out = match std::process::Command::new("wsl.exe")
+    let out = match quiet_command("wsl.exe")
         .args(["-l", "-q"])
         .output()
     {
diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index 667e7a3..68612ba 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://schema.tauri.app/config/2",
   "productName": "Claude Usage Widget",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "identifier": "com.megaproxy.claude-usage-widget",
   "build": {
     "beforeDevCommand": "pnpm dev",