#!/usr/bin/env bash 

set -eu

TMP1="/tmp/vdn-dir1"
TMP2="/tmp/vdn-dir2"
TMP="/tmp/vdn-dir"
EXCLUDES=""

synopsis() {
	cat << EOF
Usage : `basename $0` [-h] dir1 dir2
EOF
}

help() {
	cat << EOF

`basename $0` affiche les différences dans les archives des modifications.

dir1 et dir2 doivent contenir les archives des modifications des systèmes.

Exemple : `basename $0` ~/.vdn-0.7.bak/demo ~/.vdn-0.7/demo

`synopsis`

-h      : affiche cette aide

EOF
}

usage() {
	synopsis
	exit 1
}

args() {
	local opt
	while getopts "h" opt; do
		case $opt in
			h) help; exit 0;;
			?) usage;;
		esac
	done

	shift $(($OPTIND - 1))
	[ $# -ne 2 ] && usage

	DIR1=$1
	DIR2=$2
}

# Programme principal

VDN_PATH=$(readlink -f $(dirname $0)/..); . $VDN_PATH/bin/functions.sh

args "$@"

[ ! -d "$DIR1" ] && usage
[ ! -d "$DIR2" ] && usage


l1=$(cd $DIR1; ls *.tgz)
l2=$(cd $DIR2; ls *.tgz)
l=$(echo "$l1 $l2" | tr " " '\n' | sort -u | tr '\n' ' ')

for i in $l; do
	echo
	echo "#------------------------------------------------------------"
	echo "###    $i"
	echo "#------------------------------------------------------------"
	echo

	if [ ! -e $DIR1/$i ]; then
		echo "error : $DIR1/$i absent"
		continue
	fi
	if [ ! -e $DIR2/$i ]; then
		echo "error : $DIR2/$i absent"
		continue
	fi

	rm -Rf $TMP1 $TMP2
	mkdir $TMP1 $TMP2
	tar -C $TMP1 -xzf $DIR1/$i 2> /dev/null
	tar -C $TMP2 -xzf $DIR2/$i 2> /dev/null

	for f in $EXCLUDES; do
		rm -Rf $TMP1/$f; rm -Rf $TMP2/$f
	done

	diff -Bru $TMP1 $TMP2 2> /dev/null || true

done

echo "### END ###"