Pair-up script

pairup.sh

#!/bin/bash

#############################
# ./pairup
#   tmux pairing setup script
#############################

# Prerequisites:
#   tmux
#   ngrok

# Before running this command, you'll need to add the public keys of the users you'd like to have connect to your session.
# For convenience, github public keys are a great way to go.  It can be accessed via https://api.github.com/users/$username/keys
#
# e.g.
# ~/.ssh/authorized_keys -->
#   command="/usr/local/bin/tmux new-session -t pairing -s $@-session" ssh-rsa <key goes here> https://github.com/username

tmux_user=${TMUX_USER:-$USER}
ngrok_host=${NGROK_HOST:-0.tcp.ngrok.io}

tmux new-session -d -s pairing "ngrok tcp --log /tmp/ngrok.log 22"
tmux split-window
sleep 1

ngrok_port=$(grep 'tcp://' /tmp/ngrok.log | tail -1 | awk -F':' '{ print $NF }')
ssh_command="ssh -p $ngrok_port $tmux_user@$ngrok_host"

tmux send-keys "$ssh_command" C-m
tmux attach