Create and switch sessions in tmux quickly

tm.sh

#!/bin/sh
tm() {
  if [ -z $1 ]; then
    tmux switch-client -l
  else
    if [ -z "$TMUX" ]; then
      tmux new-session -As $1
    else
      if ! tmux has-session -t $1 2>/dev/null; then
        TMUX= tmux new-session -ds $1
      fi
      tmux switch-client -t $1
    fi
  fi
}

tm $1

tm_tab_complete.bash

# tmux session tab complete function
_tmux_complete_session() {
  local IFS=$'\n'
  local cur=${COMP_WORDS[COMP_CWORD]}
  COMPREPLY=( ${COMPREPLY[@]:-} $(compgen -W "$(tmux -q list-sessions | cut -f 1 -d ':')" -- "${cur}") )
}
complete -F _tmux_complete_session tm

tmux.conf

# Toggle between the last two sessions
bind m switch-client -l
bind M command-prompt -p 'switch session:' "run \"tm '%%'\""

Because 14 lines are better than a gem?

Yeah, I'm not looking for "session management". I just want to be able to switch without thinking.

Updated: Now by running tm with no arguments you can switch to the previous session. Running tm over and over will toggle you between two sessions.

Bonus: C-a m in tmux will do the same thing. C-a M will let you name a session. I found this useful today, as I have a fleet of Rails servers running. Those are in one session and I do my development in another. This lets me create and destroy windows without worrying about being tangled up with the one running the servers, but I can still check on them easily if I need to.

Ok, so that was dumb. @calebthompson let me know about tmux switch-client -l which does the same thing as the empty tm command. ahem So I changed that.

Zsh completion:

#compdef tm

_arguments "1: :(`tmux list-sessions -F'#S'`)"

# vim: filetype=zsh

Put that in a file called _tm somewhere in your fpath. I put mine in ~/.dotfiles/zsh/completions/_tm.

You'll need to run autoload -U compinit and compinit after _tm is added to your fpath in your .zshrc or wherever.

#!/bin/zsh

WORKING_DIRECTORY=$(cdpath=(. ~/code) cd $1 > /dev/null 2>&1 && pwd)
if [ -z "$TMUX" ]; then
  # not in tmux
  if [ -n "$WORKING_DIRECTORY" ]; then
    tmux new-session -As $1 -c $WORKING_DIRECTORY
  else
    tmux new-session -As $1 -c $HOME
  fi
else
  # inside tmux
  if tmux has-session -t $1 2> /dev/null; then
    tmux switch-client -t $1
  else
    if [ -n "$WORKING_DIRECTORY" ]; then
      TMUX= tmux new-session -ds $1 -c $WORKING_DIRECTORY
    else
      TMUX= tmux new-session -ds $1
    fi
    tmux switch-client -t $1
  fi
fi

Updated to automatically set the working directory (for the initial and successive windows) of new sessions to project folders, assuming that they live in ~/code. The cdpath portion of line 3 could be removed if you actually use cdpath.

No longer works with only sh.

Jon do you think it's time to move this to a project with a proper homebrew package and stuff?