fix: handle missing ip command in MTU setup

setup-bazel/action.yml

@@ -20,13 +20,24 @@ runs:
     - name: Fix MTU size for Proxmox/Docker network compatibility
       shell: bash
       run: |
-        DEFAULT_INTERFACE=$(ip route show | grep default | awk '{print $5}')
-        if [ -n "$DEFAULT_INTERFACE" ]; then
-          echo "Setting MTU of $DEFAULT_INTERFACE to 1400..."
-          if [ "$(id -u)" -eq 0 ]; then
-            ip link set dev "$DEFAULT_INTERFACE" mtu 1400 || true
+        if ! command -v ip &> /dev/null; then
+          if command -v apt-get &> /dev/null && [ "$(id -u)" -eq 0 ]; then
+            echo "ip command not found. Installing iproute2..."
+            apt-get update -qy && apt-get install -qy iproute2 || true
           else
-            sudo ip link set dev "$DEFAULT_INTERFACE" mtu 1400 || true
+            echo "ip command not found and cannot install. Skipping MTU configuration."
+          fi
+        fi
+
+        if command -v ip &> /dev/null; then
+          DEFAULT_INTERFACE=$(ip route show | grep default | awk '{print $5}')
+          if [ -n "$DEFAULT_INTERFACE" ]; then
+            echo "Setting MTU of $DEFAULT_INTERFACE to 1400..."
+            if [ "$(id -u)" -eq 0 ]; then
+              ip link set dev "$DEFAULT_INTERFACE" mtu 1400 || true
+            else
+              sudo ip link set dev "$DEFAULT_INTERFACE" mtu 1400 || true
+            fi
           fi
         fi