From ee37737ba78a0b60eba53c5adc055b45e1370afb Mon Sep 17 00:00:00 2001
From: Brad Heller <brad@tower.dev>
Date: Thu, 13 Nov 2025 22:24:43 +0000
Subject: [PATCH] Add missing environment variables

These environment variables are needed for subprocesses to do things like create lockfiles and all that!
---
 crates/tower-uv/src/lib.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/crates/tower-uv/src/lib.rs b/crates/tower-uv/src/lib.rs
index 07fc47c2..564c1435 100644
--- a/crates/tower-uv/src/lib.rs
+++ b/crates/tower-uv/src/lib.rs
@@ -48,6 +48,17 @@ fn normalize_env_vars(env_vars: &HashMap<String, String>) -> HashMap<String, Str
         // needs it to initialize it's random number generator. Fun fact!
         let systemroot = std::env::var("SYSTEMROOT").unwrap_or_default();
         env_vars.insert("SYSTEMROOT".to_string(), systemroot);
+
+        // We also need to bring along the TEMP environment variable because Python needs it for
+        // things like creating temporary files, etc.
+        let temp = std::env::var("TEMP").unwrap_or_default();
+        env_vars.insert("TEMP".to_string(), temp);
+
+        // Apparently, according to some random person on Stack Overflow, sometimes the var can be
+        // TEMP and sometimes it can be TMP. So uh...let's just grab both just in case.
+        let tmp = std::env::var("TMP").unwrap_or_default();
+        env_vars.insert("TMP".to_string(), tmp);
+
         return env_vars;
     }