split crate into own repository

build.rs

@@ -0,0 +1,33 @@
+//! Build script generating the header for the `servicepoint` C library.
+//!
+//! When the environment variable `SERVICEPOINT_HEADER_OUT` is set, the header is copied there from
+//! the out directory. This can be used to use the build script as a command line tool from other
+//! build tools.
+
+use std::{env, fs::copy};
+
+use cbindgen::{generate_with_config, Config};
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+    println!("cargo::rerun-if-changed={crate_dir}");
+
+    let config =
+        Config::from_file(crate_dir.clone() + "/cbindgen.toml").unwrap();
+
+    let output_dir = env::var("OUT_DIR").unwrap();
+    let header_file = output_dir.clone() + "/servicepoint.h";
+
+    generate_with_config(crate_dir, config)
+        .unwrap()
+        .write_to_file(&header_file);
+    println!("cargo:include={output_dir}");
+
+    println!("cargo::rerun-if-env-changed=SERVICEPOINT_HEADER_OUT");
+    if let Ok(header_out) = env::var("SERVICEPOINT_HEADER_OUT") {
+        let header_copy = header_out + "/servicepoint.h";
+        println!("cargo:warning=Copying header to {header_copy}");
+        copy(header_file, &header_copy).unwrap();
+        println!("cargo::rerun-if-changed={header_copy}");
+    }
+}