Launch a command in a new macOS terminal window and block until it exits

mac-open-terminal-and-wait.sh

#!/bin/bash
# Adapted from https://github.com/jlebon/files/blob/master/bin/gnome-terminal-wrapper
set -euo pipefail

# Needs `flock` command from https://github.com/discoteq/flock
# which can be installed via homebrew (which is not on the PATH by default)
export PATH=/usr/local/bin:$PATH

tmpf=$(mktemp)
trap "rm -f $tmpf" EXIT
session=$(tmux new -d -P flock $tmpf "$@")
osascript -e "tell application \"Terminal\"" -e "do script \"tmux attach -t $session\"" -e "activate" -e "end tell"
flock $tmpf true

osascript -e 'tell application "Terminal"' -e 'do script "exit" in tab 1 of front window' -e 'end tell'
exit 0