Generate libbluetooth bindings in OUT_DIR

.gitignore

@@ -1,2 +1 @@
 /target
-bindings.rs

build.rs

@@ -1,17 +1,6 @@
-use std::fs::OpenOptions;
-use std::io::Write;
 use std::path::PathBuf;
 
 fn main() {
-    let out_path = PathBuf::from("src/native/linux/bindings.rs");
-
-    let mut bindings_file = OpenOptions::new()
-        .create(true)
-        .write(true)
-        .truncate(true)
-        .open(out_path)
-        .unwrap();
-
     if cfg!(target_os = "linux") {
         const HEADER_FILE: &str = "src/native/linux/bluetooth_linux.h";
         println!("cargo:rerun-if-changed={HEADER_FILE}");
@@ -22,10 +11,9 @@ fn main() {
             .generate()
             .expect("Failed to generate bindings for libbluetooth");
 
-        bindings_file.write_all(b"#![allow(warnings)]\n\n").unwrap();
-
+        let out_dir = PathBuf::from(std::env::var("OUT_DIR").unwrap());
         bindings
-            .write(Box::new(bindings_file))
+            .write_to_file(out_dir.join("bindings.rs"))
             .expect("Failed to write bindings for libbluetooth");
 
         println!("cargo:rustc-link-lib=bluetooth");

src/native/linux/bindings.rs

@@ -0,0 +1,3 @@
+#![allow(warnings)]
+
+include!(concat!(env!("OUT_DIR"), "/bindings.rs"));