tmux-sshrc

# Source this file in your shell startup, i.e. bashrc, zshrc, etc.
# Wrap ssh commmand to allow smart pane behavior in tmux.
#
# After opening a tmux window and ssh-ing into another server, new panes will
# open already ssh-ed to the server.
function ssh() {
  if [ -n "$TMUX" ] # set only if within running tmux
  then
    window_index=$(tmux display-message -p '#I')

    # arbitrary environment variable name to remember ssh args like server
    # hostname so we can connect again.
    session_variable_name="window_${window_index}_ssh_args"
    
    # save in tmux session variable
    tmux setenv $session_variable_name "$*"

    # run ssh
    /usr/bin/ssh $*

    # unset variable so new panes don't continue ssh-ing to this server
    tmux setenv -u $session_variable_name
  else
    /usr/bin/ssh $*
  fi
}

# shell variable used in tmux conf to determine where script is
export TMUX_SSH_DIR=$(dirname $(readlink -f $0))

# vim: set ft=sh: