complete 2399.rs and rename storage/zeta/rust to rs

space/src-rs/build.rs

@@ -3,6 +3,8 @@ use std::fs;
 use std::path::Path;
 
 fn main() {
+    println!("cargo::rerun-if-changed=src/main.rs");
+    // TODO: change to always execute build.rs
     let target_dir = env::var("CARGO_TARGET_DIR").unwrap_or_else(|_| "target".to_string());
     let profile = env::var("PROFILE").unwrap();
     let exe_name = env::var("CARGO_PKG_NAME").unwrap();
@@ -11,8 +13,12 @@ fn main() {
 
     let target_path = Path::new(&target_dir).join(&profile).join(&exe_name);
     let dest_path = Path::new("../../build").join("rs.out");
-
+    println!("cargo::warning={}", exe_name);
     if target_path.exists() {
-        fs::copy(&target_path, &dest_path).expect("Failed to copy executable");
+        println!("cargo::warning=copy to {:#?}", dest_path);
+        match fs::copy(&target_path, &dest_path) {
+            Ok(_) => println!("cargo::warning=copy success"),
+            Err(_) => println!("cargo::warning=copy failed"),
+        }
     }
 }