Run multiple dev server

myproj.sh

#!/bin/bash

PROJECT_ROOT=~/proj

COMMANDS=(
    myserver "bundle exec rackup"
    myclient "yarn dev"
)


COUNT=$((${#COMMANDS[@]} / 2))
INDEX=0

while [ $INDEX -lt $COUNT ] ; do
  NAME=${COMMANDS[$(($INDEX * 2))]}
  COMMAND=${COMMANDS[$(($INDEX * 2 + 1))]}
  
  if [ "$INDEX" -eq 0 ] ; then
    tmux new-session -d -c $PROJECT_ROOT/$NAME
  else
    tmux split-window -v -c $PROJECT_ROOT/$NAME -p $((100 - 100/($COUNT-$INDEX+1)))
  fi
  tmux send-keys "$COMMAND" C-m

  INDEX=$((INDEX + 1))
done

tmux attach-session