add vm bin script

config/macos/bin/vm

@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+# ~/bin/vm
+#
+# SSH helper script for connecting to VMs or workstations.
+# Usage:
+#   vm [--no-tmux] <host>
+#
+# Host patterns:
+#   personal-orb           -> ssh $USER@personal@orb
+#   personal-utm           -> ssh $USER@personal.utm.local
+#   personal-workstation   -> ssh $USER@personal.workstation.lan
+#
+# Optional:
+#   --no-tmux             -> skips attaching to tmux session
+
+skip_tmux=0
+
+# Check for --no-tmux flag
+if [[ "$1" == "--no-tmux" ]]; then
+    skip_tmux=1
+    shift
+fi
+
+full="$1"
+user="$USER"
+host="$full"
+
+# Split user@host if explicitly specified
+if [[ "$full" == *@* ]]; then
+    user="${full%@*}"
+    host="${full#*@}"
+fi
+
+# Map host patterns to SSH target and tmux session
+case "$host" in
+    *-orb)
+        ssh_host="${host%-orb}@orb"
+        tmux_session="$host"
+        ;;
+    *-utm)
+        ssh_host="${host%-utm}.utm.local"
+        tmux_session="$host"
+        ssh_identity="$HOME/.ssh/id_ed25519_internal"
+        ;;
+    *-workstation)
+        ssh_host="${host%-workstation}.workstation.lan"
+        tmux_session="$host"
+        ssh_identity="$HOME/.ssh/id_ed25519_internal"
+        ;;
+    *)
+        echo "Error: unknown host pattern '$host'" >&2
+        exit 1
+        ;;
+esac
+
+# Build SSH command safely using an array
+ssh_cmd=(ssh -t)
+
+# Include identity file if needed
+[[ -n "$ssh_identity" ]] && ssh_cmd+=(-i "$ssh_identity" -o IdentitiesOnly=yes)
+
+# Add target user and host
+ssh_cmd+=("$user@$ssh_host")
+
+# Add tmux session unless skipped
+[[ $skip_tmux -eq 0 ]] && ssh_cmd+=("tmux" "new" "-A" "-s" "$tmux_session")
+
+# Replace current shell with SSH command
+# echo "Executing: ${ssh_cmd[*]}" >&2
+exec "${ssh_cmd[@]}"
+