common-configs/bash/bash_tmux.sh

#!/bin/bash
# vim: set filetype=sh:

# tmux configuration files are found in /tmux
export TMUX_CONF_DIR=${TMUX_CONF_DIR:-$__COMMON_CONFIGS/tmux}
# default status script just shows whether a reboot is needed
export TMUX_STATUS_SCRIPT=${TMUX_STATUS_SCRIPT:-"$TMUX_CONF_DIR/tmux.need-reboot.sh"}

function tmux_running() {
  tmux -2 has-session -t "Nexus"
}

function tmux_init() {
  tmux -2 new-session -d -s "Nexus" 'LC_ALL=C.UTF-8 fortune | cowsay -f eyes -W "$COLUMNS"; exec "$SHELL" -i'
}

function go_tmux ()
{
  if [[ "$TERM" == screen* ]] || "$TERM" == tmux* ]]; then
    echo "You're already inside a tmux instance!"
    return 1;
  fi
  echo "Starting tmux..."
  tmux_running || tmux_init || return 1
  if [[ $1 == "-x" ]]; then
    exec tmux -2 attach-session -t "Nexus" || return 1
  else
    tmux -2 attach-session -t "Nexus" || return 1
  fi
}

function auto_tmux ()
{
  if [[ -t 1 ]] && [[ -t 0 ]] && [[ -t 2 ]] && [[ "$TERM" != screen* ]] && [[ -z "$ALREADY_TRIED_STARTING_TMUX" ]]; then
    ALREADY_TRIED_STARTING_TMUX=true
    go_tmux -x
  fi
}