Automatically ssh to the current pane's target if applicable

tmux-smartsplit.sh

#!/bin/bash
# tmux-smartsplit
# open a new tmux (split-)window which will automatically
# continue the existing ssh session if one exists

PID=$(tmux display-message -p -F "#{pane_pid}")
if [[ $(readlink /proc/$PID/exe) == $(which ssh) ]]; then
        CHILD=$PID
else
        CHILD=$(cat /proc/[0-9]*/stat | awk '$4 == '$PID' {print $1; exit}')
fi

CMD=""
if [[ "$CHILD" != "" ]]; then
        CMD="$(python3.4 -c 'import shlex, sys; parts = list(filter(None, open(sys.argv[1]).read().split("\0"))); print(" ".join(map(shlex.quote, parts)) if parts[0] == "ssh" else "")' "/proc/$CHILD/cmdline")"
fi

cd "$(tmux display-message -p '#{pane_current_path}')"
case "$1" in
        h)
                tmux splitw -h -c "#{pane_current_path}"
                ;;
        v)
                tmux splitw -v -c "#{pane_current_path}"
                ;;
        w)
                tmux neww -c "#{pane_current_path}"
                ;;
esac

if [[ "$CMD" != "" ]]; then
        ID=$(tmux display-message -p -F "#{pane_id}")
        tmux send-keys -t "$ID" C-l
        tmux send-keys -l -t "$ID" " $CMD"
        tmux send-keys -t "$ID" Enter
fi

tmux.conf

bind '"' run-shell -b 'tmux-smartsplit v'
bind % run-shell -b 'tmux-smartsplit h'