From 90298ad35da9593242c59a5766369911bbefcf96 Mon Sep 17 00:00:00 2001
From: franchioping <franchioping@galard.uk>
Date: Thu, 2 Apr 2026 16:53:22 +0100
Subject: [PATCH] fix building with cargo (dont build the bindings file unless
 ESP32 env variables are present). ready to merge

---
 build.rs | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/build.rs b/build.rs
index 66e16ac..b89a83c 100644
--- a/build.rs
+++ b/build.rs
@@ -2,10 +2,12 @@ use std::path::{Path, PathBuf};
 use std::{env, time};
 
 fn main() {
-    let cargo_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
-    let target_dir = PathBuf::from(env::var("CARGO_BUILD_TARGET_DIR").unwrap());
+    if env::var("CARGO_BUILD_TARGET_DIR").is_ok() {
+        let cargo_dir = PathBuf::from(env::var("CARGO_MANIFEST_DIR").unwrap());
+        let target_dir = PathBuf::from(env::var("CARGO_BUILD_TARGET_DIR").unwrap());
 
-    run_cbindgen(&cargo_dir, &target_dir);
+        run_cbindgen(&cargo_dir, &target_dir);
+    }
 }
 
 fn run_cbindgen(cargo_dir: &Path, target_dir: &Path) {