add prompt

scripts/is_root_namespace.py

@@ -0,0 +1,11 @@
+#!/usr/bin/env python3
+import sys
+import re
+
+with open("/proc/self/net/dev", "r") as f:
+    data = f.read()
+    match = re.search("^enp[0-9a-z]+:", data, re.MULTILINE)
+    if match is None:
+        sys.exit(1)
+    else:
+        sys.exit(0)

scripts/vpn_prompt.sh

@@ -0,0 +1,4 @@
+if ! /snacks/wireguard_scripts/is_root_namespace.py
+then
+    export PS1='%F{red}<vpn>%f %n@%m % %c %#'
+fi