From cb9b106ff89cd05cde757ad76369b61d90d46c1b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A9ctor=20Ram=C3=B3n=20Jim=C3=A9nez?= <hector@hecrj.dev>
Date: Mon, 8 Sep 2025 05:32:23 +0200
Subject: [PATCH] Allow system theme override with `ICED_THEME` env variable

---
 core/src/theme.rs | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/core/src/theme.rs b/core/src/theme.rs
index 3c0f51f9..5f2fb127 100644
--- a/core/src/theme.rs
+++ b/core/src/theme.rs
@@ -271,6 +271,24 @@ pub trait Base {
 
 impl Base for Theme {
     fn default(preference: Mode) -> Self {
+        use std::env;
+        use std::sync::OnceLock;
+
+        static SYSTEM: OnceLock<Option<Theme>> = OnceLock::new();
+
+        let system = SYSTEM.get_or_init(|| {
+            let name = env::var("ICED_THEME").ok()?;
+
+            Theme::ALL
+                .iter()
+                .find(|theme| theme.to_string() == name)
+                .cloned()
+        });
+
+        if let Some(system) = system {
+            return system.clone();
+        }
+
         match preference {
             Mode::None | Mode::Light => Self::Light,
             Mode::Dark => Self::Dark,