#!/bin/sh
cmd=$(which tmux)        # tmux path
session="basic"          # $(hostname -s) # session name

if [ -z $cmd ]; then
    echo "You need to install tmux."
    exit 1
fi

$cmd has-session -t $session 2> /dev/null
if [ $?  != 0 ]
then
    # -s: session's name. -n: initial window's name, -d: detaching from the new session.
    $cmd new-session -s $session -n editor -d
    # send a command. C-m: send the Carriage Return sequence.
    $cmd send-keys -t $session 'cd ~' C-m
    $cmd send-keys -t $session 'vim' C-m
    # split window. -v: top/botton, -h: left/right, -p: percent, default 50.
    $cmd split-window -v -p 10 -t $session
    # or, select a default tmux layout.
    #cmd select-layout -t $session main-horizontal
    # using [session]:[window].[pane] to sepecify a exact pane.
    # NOTE: the default base index has changed to 1(default 0).
    $cmd send-keys -t $session:1.2 'cd ~' C-m
    # create a new window.
    $cmd new-window -n console -t $session
    $cmd send-keys -t $session:2 'cd ~' C-m
    # select the first window to display.
    $cmd select-window -t $session:1
fi
$cmd attach -t $session
exit 0