#!/bin/bash
#
# Author: Cody Hiar
# Date: 2017-04-22
#
# Purpose: The purpose of this script is to accept a file name then find a tmux
# pane that is currently running either vim or neovim and tell that pane to open
# up the file. This script is meant to be used with a fuzzy find such as fzf so
# that you can use an external fuzzy finder but still integrate it with vim
#
# Set options:
#   e: Stop script if command fails
#   u: Stop script if unset variable is referenced
#   x: Debug, print commands as they are executed
# set -eu

# Immutable globals
readonly ARGS=( "$@" )
readonly PROGNAME=$(basename "$0")

# Main loop of program
main() {
    if [[ -z ${ARGS[0]} ]]; then
        exit
    fi
    CURRENT_PANE=$(tmux display-message -p  "#{pane_index}")
    PANES=($(tmux list-panes| awk -F: '{ print $1 }'))
    for pane in "${PANES[@]}"; do
        PANE_TTY=$(tmux display -p -t "$pane" '#{pane_tty}')
        ps -o state= -o comm= -t "$PANE_TTY" \
            | grep -iqE '^[^TXZ ]+ +(\\S+\\/)?g?(view|n?vim?x?)(diff)?$' &> /dev/null
        if [[ "$?" == 0 ]]; then
            filename="${ARGS[0]}"
            tmux send-keys -t "$pane" ":e $filename" Enter
            tmux select-pane -t "$pane"
        fi
    done
}
main