fix(部署脚本): 增强后端部署脚本的健壮性和调试信息

添加路径检查和进程验证逻辑，改进错误处理和调试日志输出

scripts/deploy_backend.sh

@@ -9,13 +9,34 @@
 
 set -euo pipefail
 
-ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")"/.. && pwd)"
+# 获取脚本所在目录的绝对路径
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
 BACKEND_DIR="$ROOT_DIR/backend"
 BIN_PATH="$BACKEND_DIR/target/release/udmin"
 LOG_FILE="$BACKEND_DIR/udmin.log"
 PID_FILE="$BACKEND_DIR/udmin.pid"
 ENV_FILE_VALUE="${ENV_FILE:-prod}"
 
+# 调试信息：打印关键路径
+echo "[backend] Script directory: $SCRIPT_DIR"
+echo "[backend] Root directory: $ROOT_DIR"
+echo "[backend] Backend directory: $BACKEND_DIR"
+echo "[backend] Binary path: $BIN_PATH"
+
+# 检查关键目录是否存在
+if [ ! -d "$BACKEND_DIR" ]; then
+  echo "[backend] ERROR: Backend directory does not exist: $BACKEND_DIR" >&2
+  echo "[backend] Please ensure the script is placed in the correct location relative to the project structure" >&2
+  exit 1
+fi
+
+if [ ! -f "$BACKEND_DIR/Cargo.toml" ]; then
+  echo "[backend] ERROR: Cargo.toml not found in backend directory: $BACKEND_DIR" >&2
+  echo "[backend] This doesn't appear to be a valid Rust project directory" >&2
+  exit 1
+fi
+
 cd "$BACKEND_DIR"
 
 echo "[backend] Building release binary..."
@@ -47,21 +68,32 @@ stop_pid() {
 }
 
 # 1) Stop by PID file if present
+echo "[backend] Checking for existing PID file: $PID_FILE"
 if [ -f "$PID_FILE" ]; then
   PID_CONTENT="$(cat "$PID_FILE" 2>/dev/null || true)"
   if [ -n "$PID_CONTENT" ]; then
+    echo "[backend] Found PID file with PID: $PID_CONTENT"
     stop_pid "$PID_CONTENT"
+  else
+    echo "[backend] PID file exists but is empty"
   fi
   rm -f "$PID_FILE"
+  echo "[backend] Removed PID file"
+else
+  echo "[backend] No PID file found"
 fi
 
 # 2) Fallback: stop any process matching the release binary path (safe, avoids killing debug run)
+echo "[backend] Searching for existing processes matching: $BIN_PATH"
 PGREP_PIDS="$(pgrep -f "$BIN_PATH" 2>/dev/null || true)"
 if [ -n "$PGREP_PIDS" ]; then
-  echo "[backend] Found existing udmin by path, stopping: $PGREP_PIDS"
+  echo "[backend] Found existing udmin processes by path: $PGREP_PIDS"
   for p in $PGREP_PIDS; do
+    echo "[backend] Stopping process: $p"
     stop_pid "$p"
   done
+else
+  echo "[backend] No existing processes found matching the binary path"
 fi
 
 # Rotate log
@@ -77,6 +109,23 @@ NEW_PID=$!
 
 echo "$NEW_PID" > "$PID_FILE"
 
-echo "[backend] Started. PID=$NEW_PID"
+echo "[backend] Started with PID: $NEW_PID"
 echo "[backend] Logs: $LOG_FILE"
-echo "[backend] PID file: $PID_FILE"
+echo "[backend] PID file: $PID_FILE"
+
+# 等待几秒钟验证进程是否成功启动
+echo "[backend] Waiting 3 seconds to verify startup..."
+sleep 3
+
+if ps -p "$NEW_PID" > /dev/null 2>&1; then
+  echo "[backend] ✅ Process is running successfully (PID: $NEW_PID)"
+  echo "[backend] Deployment completed successfully!"
+else
+  echo "[backend] ❌ ERROR: Process failed to start or crashed immediately" >&2
+  echo "[backend] Check the log file for details: $LOG_FILE" >&2
+  if [ -f "$LOG_FILE" ]; then
+    echo "[backend] Last few lines of log:" >&2
+    tail -10 "$LOG_FILE" >&2
+  fi
+  exit 1
+fi