tmuxattach

#!/bin/bash

# export TERM=xterm-256color

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

# use session "main" as default

if [[ -z "$1" ]]; then
    sess_name="main"
else
    sess_name="$1"
fi

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

sess_exists=`tmux ls | grep "^${sess_name}:" | wc -l`
sess_active=`tmux ls | grep "^${sess_name}" | grep "attached" | wc -l`

if [[ -z "$TMUX" ]]; then
    # if sess does not yet exist make it
    if [[ "$sess_exists" == "0" ]]; then
        echo "Launching tmux base session $sess_name ..."
        tmux new-session -s $sess_name
    # if sess is inactive connect to it
    elif [[ "$sess_active" == "0" ]]; then
        tmux attach -t $sess_name
    # else copy session and connect to it
    else
        session_id="${sess_name}_`date +%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 $sess_name -s $session_id
        # Attach to the new session
        tmux attach-session -t $session_id
        # When we detach from it, kill the session
        tmux kill-session -t $session_id
    fi
fi