#!/bin/bash
set -euo pipefail

SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
APP_ROOT_DIR="$(dirname "$SCRIPT_DIR")"
. "$APP_ROOT_DIR/config.sh"

infile=${1:-}
outfile=${2:-}
if [[ -z "$infile" ]] || [[ -z "$infile" ]]; then
	echo "Usage: $0 infile.mar outfile.mar"
	exit 1
fi

mar="$APP_ROOT_DIR/xulrunner/bin/mar"
if [ ! -f "$mar" ]; then
	echo "$mar not found"
	exit 1
fi

tmp_dir=`mktemp -d`
function cleanup {
	rm -rf $tmp_dir
}
trap cleanup EXIT

cd "$tmp_dir"
mkdir in
cd in

if [ "`uname -o 2> /dev/null`" = "Cygwin" ]; then
	infile=$(cygpath -w "$infile")
	outfile=$(cygpath -w "$outfile")
fi

echo "Extracting MAR"
$mar -x "$infile"

echo "Renaming all files to .xz"
find . -type f -exec mv {} {}.xz \;
echo "Uncompressing files"
find . -type f -exec unxz {} \;
echo "Recompressing files with bzip2"
find . -type f -exec bzip2 {} \;
echo "Removing .bz extension"
find . -type f | while read f; do mv "$f" "${f%.bz2}"; done

channel=$($mar -T "$infile" | sed -n -r 's/.+MAR channel name: ([^\s]+)/\1/p')
version=$($mar -T "$infile" | sed -n -r 's/.+Product version: ([^\s]+)/\1/p')

if [ -z "$channel" ]; then
	echo "Could not detect channel"
	exit 1
fi
if [ -z "$version" ]; then
	echo "Could not detect version"
	exit 1
fi

echo "MAR channel name: $channel"
echo "Product version: $version"

echo "Creating new MAR"
$mar -V $version -H $channel -c "$outfile" `find . -type f | sed 's/^\.\///'`
echo
$mar -T "$outfile"