#!/bin/bash

#
# Modified TMUX start script from:
#     http://forums.gentoo.org/viewtopic-t-836006-start-0.html
#
# Store it to `~/bin/tmx` and issue `chmod +x`.
#

# Works because bash automatically trims by assigning to variables and by 
# passing arguments
trim() { echo "$1"; }

base_session="$1"

if [[ -z "$1" ]]; then
	base_session="default"
fi

# Only because I often issue `ls` to this script by accident
if [[ "$1" == "ls" ]]; then
    tmux ls
    exit
fi

# This actually works without the trim() on all systems except OSX
tmux_nb=$(trim "$(tmux ls | grep -c "^$base_session")")
if [[ "$tmux_nb" == "0" ]]; then
    echo "Launching tmux base session $base_session ..."
    tmux new-session -s $base_session
else
    # Make sure we are not already in a tmux session
    if [[ -z "$TMUX" ]]; then
        echo "Launching copy of base session $base_session ..."
        # Session is is date and time to prevent conflict
        session_id=$(date +%Y%m%d%H%M%S)
        # Create a new session (without attaching it) and link to base session 
        # to share windows
        tmux new-session -d -t $base_session -s "$session_id"
        if [[ "$2" == "1" ]]; then
		# Create a new window in that session
		tmux new-window
	fi
        # Attach to the new session & kill it once orphaned
	tmux attach-session -t "$session_id" \; set-option destroy-unattached
    fi
fi