Match VPN interface fuzzy on Linux

powerlevel9k.zsh-theme

@@ -620,8 +620,15 @@ prompt_public_ip() {
           fi
         done
       else
-        local interface=$(${ROOT_PREFIX}/sbin/ip -brief -4 a show "${POWERLEVEL9K_PUBLIC_IP_VPN_INTERFACE}")
-        [[ -n "$interface" ]] && icon='VPN_ICON'
+        local -a interfaces
+        interfaces=( "${(f)$(${ROOT_PREFIX}/sbin/ip -brief -4 a show)}" )
+        local pattern="^${POWERLEVEL9K_PUBLIC_IP_VPN_INTERFACE}[ ]+UP[ ]+"
+        for interface in "${(@)interfaces}"; do
+          if [[ "$interface" =~ $pattern ]]; then
+            icon='VPN_ICON'
+            break
+          fi
+        done
       fi
     fi
     $1_prompt_segment "$0" "$2" "$DEFAULT_COLOR" "$DEFAULT_COLOR_INVERTED" "${public_ip}" "$icon"

test/segments/public_ip.spec

@@ -113,6 +113,15 @@ function fakeIp() {
 INNER
   fi
 
+  if [[ "\$*" =~ '-brief.*show' ]]; then
+    cat <<INNER
+lo               UNKNOWN        127.0.0.1/8
+${INTERFACE1}    UP             1.2.3.4/24
+${INTERFACE2}    UP             5.4.3.2/16
+docker0          DOWN           172.17.0.1/16
+INNER
+  fi
+
   if [[ "\$*" =~ 'show ${INTERFACE1}' ]]; then
     cat <<INNER
 3: ${INTERFACE1}: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000