#!/bin/bash

set -e

cd "`dirname $0`"

date="`date +'%Y%m%d'`"
dir="`pwd`"
if [ "$dir" = "$HOME" ]; then
	relpath=""
else
	relpath="${dir##$HOME/}/"
fi

for file in bash_profile bashrc screenrc vimrc zshrc zshfunc; do
	if [ -L "$HOME/.$file" ]; then
		if [ "$(readlink "$HOME/.$file")" = "$dir/$file" ]; then # old style symlink, remove
			rm -v -f "$HOME/.$file"
		fi
	fi
	if ! [ -L "$HOME/.$file" ]; then
		if [ -e "$HOME/.$file" ]; then
			mv "$HOME/.$file" "$HOME/.$file-$date"
		elif [ -L "$HOME/.$file" ]; then # dangling symlink
			rm -f "$HOME/.$file"
		fi
		ln -v -s "$relpath$file" "$HOME/.$file"
	fi
done