From a411d5b2ca02c8bf00d33bfdcae9cf7dcde535d6 Mon Sep 17 00:00:00 2001
From: JieXu <xujie0739@gmail.com>
Date: Mon, 18 Aug 2025 09:29:38 +0800
Subject: [PATCH] Update package-rhel.sh

---
 package-rhel.sh | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/package-rhel.sh b/package-rhel.sh
index 4ad6e181..bbc57ad0 100644
--- a/package-rhel.sh
+++ b/package-rhel.sh
@@ -1,7 +1,24 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-# Require Red Hat Enterprise Linux / Rocky Linux / AlmaLinux
+# ===== Require Red Hat Enterprise Linux / Rocky Linux / AlmaLinux ======================
+if [[ -r /etc/os-release ]]; then
+  . /etc/os-release
+  case "$ID" in
+    rhel|rocky|almalinux)
+      echo "[OK] Detected supported system: $NAME $VERSION_ID"
+      ;;
+    *)
+      echo "[ERROR] Unsupported system: $NAME ($ID)."
+      echo "This script only supports Red Hat Enterprise Linux / Rocky Linux / AlmaLinux."
+      exit 1
+      ;;
+  esac
+else
+  echo "[ERROR] Cannot detect system (missing /etc/os-release)."
+  exit 1
+fi
+
 # ===== Config & Parse arguments =========================================================
 VERSION_ARG="${1:-}"     # Pass version number like 7.13.8, or leave empty
 WITH_CORE="both"         # Default: bundle both xray+sing-box