fix: preserve executable bits in npm bundles

Author: Loongphy

codex-cli/scripts/build_npm_package.py

@@ -383,6 +383,7 @@ def copy_native_binaries(
             if dest_component_dir.exists():
                 shutil.rmtree(dest_component_dir)
             shutil.copytree(src_component_dir, dest_component_dir)
+            ensure_executable_files(dest_component_dir)
 
     if target_filter is not None:
         missing_targets = sorted(target_filter - copied_targets)
@@ -391,6 +392,15 @@ def copy_native_binaries(
             raise RuntimeError(f"Missing target directories in vendor source: {missing_list}")
 
 
+def ensure_executable_files(root: Path) -> None:
+    for path in root.rglob("*"):
+        if not path.is_file():
+            continue
+
+        current_mode = path.stat().st_mode
+        path.chmod(current_mode | 0o111)
+
+
 def run_npm_pack(staging_dir: Path, output_path: Path) -> Path:
     output_path = output_path.resolve()
     output_path.parent.mkdir(parents=True, exist_ok=True)