split works

libcsp-sys/build.rs

@@ -0,0 +1,28 @@
+use std::{env, path::PathBuf};
+
+pub const ENV_KEY_CSP_CONFIG_DIR: &str = "CSP_CONFIG_DIR";
+
+fn main() {
+    println!("cargo:rustc-link-lib=csp");
+
+    let out_path = env::var("OUT_DIR").unwrap();
+    let csp_conf_dir = match env::var("CSP_CONFIG_DIR") {
+        Ok(conf_path) => conf_path,
+        Err(_e) => {
+            println!("cargo:warning=CSP_CONFIG_DIR not set, using CARGO_MANIFEST_DIR to search for autoconfig.rs");
+            env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set")
+        }
+    };
+    let mut csp_conf_path = PathBuf::new();
+    csp_conf_path.push(csp_conf_dir);
+    csp_conf_path.push("autoconfig.rs");
+    if !csp_conf_path.exists() {
+        panic!(
+            "autoconfig.rs not found at {:?}, is required for library build",
+            csp_conf_path
+        );
+    }
+    let out_path_full = PathBuf::from(&out_path).join("autoconfig.rs");
+    std::fs::copy(&csp_conf_path, out_path_full).expect("failed to copy autoconfig.rs to OUT_DIR");
+    println!("cargo::rerun-if-changed={:?}", &csp_conf_path);
+}