fix install shell

Author: ityuany

.github/workflows/debug-install-shell.yml

@@ -47,8 +47,8 @@ jobs:
         run: |
           chmod +x install.sh
           ./install.sh --install-dir "~/.snm-demo"
-          # if [ ! -d ~/.snm-demo ]; then
-          #   echo "Error: ~/.snm-demo directory not found!"
-          #   exit 1
-          # fi
+          if [ ! -d ~/.snm-demo ]; then
+            echo "Error: ~/.snm-demo directory not found!"
+            exit 1
+          fi
           ls -l ~/.snm-demo

install.sh

@@ -78,7 +78,13 @@ download_snm() {
   fi
   DOWNLOAD_DIR=$(mktemp -d)
   echo "Downloading $URL..."
-  mkdir -p "$INSTALL_DIR" &>/dev/null
+   # 创建安装目录
+  if ! mkdir -p "$INSTALL_DIR" 2>/dev/null; then
+    echo "Failed to create directory: $INSTALL_DIR"
+    echo "Please check permissions and try again."
+    exit 1
+  fi
+  
   if ! curl --progress-bar --fail -L "$URL" -o "$DOWNLOAD_DIR/$FILENAME"; then
     echo "Download failed.  Check that the release/filename are correct."
     exit 1