#!/bin/bash
# A simple bookmarking alias used in conjunction with rdir and our $HOME/.aliases file to bookmark our current directory to be returned to later using rdir.
# make sure we don't overwrite our .shrc
set -o noclobber
# save our current working directory
sdir=$(pwd)

# grabs the rc file of preferred shell (only works with bash and zsh currently)
shellrc=.$(echo "$SHELL" | awk -F '/' '{ print $NF }')rc
# grabs the last line of our .zshrc, and grabs the first word
last_line_first_word=$(awk '{w=$1} END{print w}' "$HOME"/"$shellrc")

# if the last line of our rc file begins with "export"...
# remove the last line of our rc file
if [[ $last_line_first_word == "export" ]] ; then
    sed -i '$ d' "$HOME"/"$shellrc"
fi

# and write that directory temporarily, appending it onto the end of our rc
echo 'export sdir='"$sdir" >> "$HOME"/"$shellrc"
# immediately source it to use it in this shell session
source "$HOME"/"$shellrc"