Add runvm function with IP detection for libvirt VMs

dotfiles/desktop/.bashrc.d/30-runvm.sh

@@ -0,0 +1,94 @@
+#!/bin/bash
+
+runvm() {
+  local vm state choice count i ip
+
+  if ! command -v virsh >/dev/null 2>&1; then
+    printf '%s\n' "runvm: virsh is required (libvirt)" >&2
+    return 1
+  fi
+
+  sudo -v
+
+  local line
+  vms=()
+  while IFS= read -r line; do
+    [ -n "$line" ] && vms+=("$line")
+  done < <(sudo virsh list --all --name)
+
+  if [ ${#vms[@]} -eq 0 ]; then
+    printf '%s\n' "runvm: no VMs found" >&2
+    return 1
+  fi
+
+  printf '\n%s\n' "VMs:"
+  count=1
+  for i in "${!vms[@]}"; do
+    state=$(sudo virsh dominfo "${vms[$i]}" 2>/dev/null | awk '/^State:/ {print $2}')
+    printf '  %d) %-30s [%s]\n' "$((count++))" "${vms[$i]}" "${state:-unknown}"
+  done
+  printf '\n'
+
+  read -p "Select VM (1-${#vms[@]}) or 'q' to quit: " choice
+
+  if [ "$choice" = "q" ] || [ -z "$choice" ]; then
+    return 0
+  fi
+
+  if ! [[ "$choice" =~ ^[0-9]+$ ]] || [ "$choice" -lt 1 ] || [ "$choice" -gt "${#vms[@]}" ]; then
+    printf '%s\n' "runvm: invalid choice" >&2
+    return 1
+  fi
+
+  vm="${vms[$((choice - 1))]}"
+  state=$(sudo virsh dominfo "$vm" 2>/dev/null | awk '/^State:/ {print $2}')
+
+  printf '\nSelected: %s\n' "$vm"
+
+  if [ "$state" = "running" ]; then
+    printf '  VM is already running.\n'
+    ip=$(_runvm_get_ip "$vm")
+    if [ -n "$ip" ] && [ "$ip" != "<unknown>" ]; then
+      printf '  IP: %s\n' "$ip"
+    fi
+    return 0
+  fi
+
+  printf 'Starting %s...\n' "$vm"
+  if ! sudo virsh start "$vm"; then
+    printf '  failed to start %s\n' "$vm" >&2
+    return 1
+  fi
+
+  printf '  %s started.\n' "$vm"
+  printf '  Waiting for IP...\n'
+  ip=$(_runvm_get_ip "$vm")
+
+  if [ -n "$DISPLAY" ] && command -v notify-send >/dev/null 2>&1; then
+    notify-send "$vm started" "IP: $ip" 2>/dev/null
+  fi
+
+  printf '  IP: %s\n' "$ip"
+
+  return 0
+}
+
+_runvm_get_ip() {
+  local vm="$1"
+  local mac network ip i
+
+  mac=$(sudo virsh dumpxml "$vm" | awk -F"'" '/mac address/ {print $2}')
+  [ -z "$mac" ] && return 1
+
+  network=$(sudo virsh dumpxml "$vm" | awk -F"'" '/source network/ {print $2}')
+  [ -z "$network" ] && return 1
+
+  for i in $(seq 15); do
+    ip=$(sudo virsh net-dhcp-leases "$network" 2>/dev/null | \
+         awk -v m="$mac" '$3 == m {print $5}' | cut -d/ -f1)
+    [ -n "$ip" ] && break
+    sleep 2
+  done
+
+  printf '%s' "${ip:-<unknown>}"
+}