Improve Rust

execute.py

@@ -255,15 +255,22 @@ def unsafe_execute_rust(check_program, result, timeout):
         os.makedirs(RUST_BIN, exist_ok=True)
 
         # Check if Cargo exists, if so copy it here
-        if os.path.exists("../Cargo.toml"):
-            shutil.copy("../Cargo.toml", RUST_DIR)
+        if os.path.exists("/Cargo.toml"):
+            shutil.copy("/Cargo.toml", RUST_DIR)
         else:
             # Warn that no Cargo was found in the parent directory
-            logging.warning(f"Cargo.toml not found in {os.path.abspath('../')}. Creating a new one. Timeout of >300 is recommended.")
+            logging.warning(f"Cargo.toml not found in root directory ({os.path.abspath('/')}). Creating a new one. Timeout of >300 is recommended.")
             # Create Cargo.toml
             open(f"{RUST_DIR}/Cargo.toml", 'w').write(BASE_CARGO)
 
-        open(f"test.rs", 'w').write(check_program)
+        with tempfile.NamedTemporaryFile(dir = RUST_BIN, delete=False) as f:
+            file_name: str =  "test" + RUST_EXT
+            os.rename(f.name, os.path.join(RUST_BIN, file_name))
+            # Dump the rust source code in the target temporal file
+            f.write(check_program.encode('utf-8'))
+
+        # Proceed towards Rust binaries compilation. Therefore move to Rust module root dir.
+        os.chdir(RUST_DIR)
 
         compilation_result = subprocess.run(["cargo", "check", "--bin", "test", "--message-format", "json"], capture_output=True)
         if compilation_result.returncode == 0: