tmux login shell script.

tmlogin

#!/bin/bash
# See http://www.erebusbat.com/2015/08/tmux-login-wrapper-script/
# Inspired by https://github.com/nicknisi/dotfiles

# abort if we're already inside a TMUX session
[ "$TMUX" == "" ] || exit 0
export SHELL=/usr/local/bin/zsh
export TERM=xterm-256color
export PATH=/usr/local/bin:$PATH
export COLUMNS=1

function printLineSep() {
    clear
    echo -e "\n==============================================="
}
function newSession() {
    NEWK="==== NEW TMUX SESSION"
    PS3="Create new TMUX Session: "
    tmuxinator_dir=$HOME/.tmuxinator
    # Remove the directory, make it prettier
    sessions=$(ls ${tmuxinator_dir}/*.yml | rev | cut -d '/' -f1 | rev | cut -d '.' -f1)
    options=("$NEWK" $sessions)
    select opt in "${options[@]}"
    do
        case $opt in
        $NEWK)
            read -p "Enter new session name: " SESSION_NAME
            printLineSep
            tmux new -s "$SESSION_NAME"
            break
            ;;
        *)
            # Load RVM
            if [[ -s "$HOME/.rvm/scripts/rvm" ]] ; then
                source "$HOME/.rvm/scripts/rvm"
            fi
            echo "Found mux: $(which mux)"
            printLineSep
            mux $opt 
            break
            ;;
       esac
    done
}
function mainMenu() {
    # present menu for user to choose which workspace to open
    PS3="Please choose your session: "
    NEWK="==== NEW SESSION"
    RAWK="==== RAW ZSH (no tmux)"
    options=("$NEWK" $(tmux list-sessions -F "#S") "$RAWK")
    echo -e "\n\n"
    echo "Available sessions"
    echo "------------------"
    echo " "
    select opt in "${options[@]}"
    do
        case $opt in
        $NEWK)
            # read -p "Enter new session name: " SESSION_NAME
            # tmux new -s "$SESSION_NAME"
            printLineSep
            newSession
            break
            ;;
        $RAWK)
            zsh --login
            break;;
        *)
            printLineSep
            tmux attach-session -t $opt
            break
            ;;
        esac
    done
}

# Show a looping menu as long as there are tmux sessions active (or it is the first run)
SHOWMENU=1
while [ "$SHOWMENU" == "1" ]; do
    SHOWMENU=0
    mainMenu
    
    # Check to see if we still have sessions, if we do, then let them choose again
    if [[ ! -z "$(tmux list-sessions)" ]]; then
        SHOWMENU=1
        echo "Previous session ended, select new session (or CTRL-C)"
    fi
done

Thanks!