utf8bom

#!/usr/bin/env bash


if [ $# -ne 2 ] && [ $# -ne 1 ]; then
	echo "use: $0 source <destination>"
	exit
fi

if [ ! -f $1 ]; then
	printf "\e[31m$1\e[0m does not seem to be a file"
	echo
	exit
fi

if [ ! -r $1 ]; then
	printf "\e[31m$1\e[0m does not seem to be readable"
	echo
	exit
fi

if [ "$1" == "help" ]; then
	echo "Use: $0 source_file <destination_file>"
	echo "If destination_file is not set - the source file will be overwritten"
	exit
fi

dest=$1
continue="Y"

if [ $# -eq 2 ]; then
	dest=$2
else
	printf "Source file will be overwritten. Continue? [Y/n] "
	read continue
fi

if [[ $continue != "Y" && $continue != "y" && $continue != "" ]]; then
	echo "Terminated by user"
	exit
fi

DIR=$(dirname "$2")

tmp=`mktemp`


printf '\xEF\xBB\xBF' > $tmp
cat $1 >> $tmp

mv $tmp $dest