feat(bin): x-localip - show active interfaces ips

local/bin/x-localip

@@ -0,0 +1,128 @@
+#!/bin/bash
+#
+# x-localip: script to display the local IP addresses of the system
+#
+# Author: Ismo Vuorinen <https://github.com/ivuorinen>
+# License: MIT
+
+VERSION="1.0.0"
+
+# Function to display usage
+usage()
+{
+  echo "Usage: x-localip [options] [interface]"
+  echo "Options:"
+  echo "  --help          Show this help message"
+  echo "  --version       Show version information"
+  echo "  --ipv4          Show only IPv4 addresses"
+  echo "  --ipv6          Show only IPv6 addresses"
+  echo "If an interface is specified, only the IP address of that interface will be returned."
+}
+
+# Initialize flags for filtering
+show_ipv4=true
+show_ipv6=true
+
+# Check for arguments
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    --help)
+      usage
+      exit 0
+      ;;
+    --version)
+      echo "x-localip version $VERSION"
+      exit 0
+      ;;
+    --ipv4)
+      show_ipv6=false
+      ;;
+    --ipv6)
+      show_ipv4=false
+      ;;
+    *)
+      iface=$1
+      ;;
+  esac
+  shift
+done
+
+declare -a interfaces
+
+# Detect platform (macOS or Linux)
+platform="$(uname)"
+if [[ $platform == "Darwin" ]]; then
+  read -r -a interfaces <<< "$(ifconfig -lu | grep -v '^bridge')"
+elif [[ $platform == "Linux" ]]; then
+  read -r -a interfaces <<< "$(ip link show | awk -F: '/^[0-9]+:/{print $2}' | tr -d ' ' | grep -v '^bridge')"
+else
+  echo "Error: Unsupported platform. Only macOS and Linux are supported."
+  exit 1
+fi
+
+# Function to fetch IP addresses for an interface
+fetch_ips()
+{
+  iface="$1"
+  local ipv4 ipv6
+  if [[ $platform == "Darwin" ]]; then
+    ipv4=$(ipconfig getifaddr "$iface" 2> /dev/null || echo "")
+    ipv6=$(ipconfig getifaddr -v6 "$iface" 2> /dev/null || echo "")
+  else
+    ipv4=$(ip -4 addr show "$iface" 2> /dev/null | awk '/inet / {print $2}' || echo "")
+    ipv6=$(ip -6 addr show "$iface" 2> /dev/null | awk '/inet6 / {print $2}' || echo "")
+  fi
+  if [[ -n $ipv4 || -n $ipv6 ]]; then
+    echo "$iface:$ipv4:$ipv6"
+  fi
+}
+
+# Determine maximum lengths for formatting
+max_iface_length=9 # "Interface" length
+max_ipv4_length=11 # "IPv4 Address" length
+max_ipv6_length=11 # "IPv6 Address" length
+
+interface_ip_list=()
+for iface in "${interfaces[@]}"; do
+  result=$(fetch_ips "$iface")
+  if [[ -n $result ]]; then
+    interface_ip_list+=("$result")
+  fi
+done
+
+interface_ip_list_array=()
+for entry in "${interface_ip_list[@]}"; do
+  IFS=: read -r iface ipv4 ipv6 <<< "$entry"
+  [[ ${#iface} -gt $max_iface_length ]] && max_iface_length=${#iface}
+  [[ ${#ipv4} -gt $max_ipv4_length ]] && max_ipv4_length=${#ipv4}
+  [[ ${#ipv6} -gt $max_ipv6_length ]] && max_ipv6_length=${#ipv6}
+  interface_ip_list_array+=("$iface:$ipv4:$ipv6")
+done
+
+# Print headers
+printf "%-${max_iface_length}s : %-${max_ipv4_length}s : %-${max_ipv6_length}s\n" "Interface" "IPv4 Address" "IPv6 Address"
+printf "%0.s-" $(seq 1 $((max_iface_length + max_ipv4_length + max_ipv6_length + 6)))
+printf "\n"
+
+# Print the results in a formatted table
+for entry in "${interface_ip_list_array[@]}"; do
+  # Split the entry into interface, IPv4, and IPv6
+  iface="${entry%%:*}"
+  rest="${entry#*:}"
+  ipv4="${rest%%:*}"
+  ipv6="${rest#*:}"
+
+  # Skip IPv4 or IPv6 as per the flags
+  ipv4_display=$([[ $show_ipv4 == true ]] && echo "$ipv4" || echo "")
+  ipv6_display=$([[ $show_ipv6 == true ]] && echo "$ipv6" || echo "")
+
+  # Print the interface name, padded to max_iface_length, followed by the IPs
+  printf "%-${max_iface_length}s" "$iface"
+  if $show_ipv4; then
+    printf " : %-${max_ipv4_length}s" "$ipv4_display"
+  fi
+  if $show_ipv6; then
+    printf " : %-${max_ipv6_length}s" "$ipv6_display"
+  fi
+  printf "\n"
+done