tm.sh

#!/bin/bash

# I only care about tmux session management, and don't care about
# nested sessions. Here's a little wrapper to singicantly ease
# session management at the expense of tmux's more powerful
# features.

usage() {
  echo "usage: tm ACTION [name]" 1>&2;
  echo "Available actions are:" 1>&2;
  echo "  a  Attach session by \`name\`" 1>&2;
  echo "  d  Detach the current session" 1>&2;
  echo "  l  List sessions" 1>&2;
  echo "  n  Create new session by \`name\`" 1>&2;
  echo "  x  Kill session by \`name\` (default: current session)" 1>&2;
  exit 1;
}

if [[ $# == 0 ]]; then
  usage
fi

ERRCODE=0

case $1 in
  
  a)
    if [[ $# > 1 ]]; then
      tmux attach -t $2
    else
      echo "usage: tm a name" 1>&2;
      ERRCODE=1
    fi
    ;;
  
  d)
    OUT="$(tmux detach 2>&1)"
    if [[ "$OUT" =~ ^(failed to connect to server) ]]; then
      echo "tm: tmux server not active" 1>&2;
      ERRCODE=1
    elif [[ $? != 0 ]]; then
      [[ -z "$OUT" ]] && echo $OUT 1>&2;
      ERRCODE=1
    fi
    ;;
  
  l)
    OUT="$(tmux list-sessions 2>&1)"
    if [[ "$OUT" =~ ^(failed to connect to server) ]]; then
      echo "tm: tmux server not active" 1>&2;
      ERRCODE=1
    elif [[ $? != 0 ]]; then
      [[ -z "$OUT" ]] && echo $OUT 1>&2;
      ERRCODE=1
    fi
    ;;
  
  n)
    if [[ $# > 1 ]] ; then
      tmux new-session -s $2
    else
      echo "usage: tm n name" 1>&2;
      ERRCODE=1
    fi
    ;;
  
  x)
    OUT="$(tmux list-sessions 2>&1)"
    if [[ $OUT =~ ^(failed to connect to server) ]]; then
      echo "tm: tmux server not active" 1>&2;
      ERRCODE=1
    else
      read -r -p "Are you sure? [y/N] " response
      if [[ $response =~ ^\s*([yY]|[yY][eE][sS])\s*$ ]]; then
        if [[ $# > 1 ]]; then
          tmux kill-session -t $2
        else
          tmux kill-session
        fi
      fi
    fi
    ;;
  
  *)
    usage
    ;;
  
esac

exit $ERRCODE