#!/bin/bash
set -e

ZIPFILE="$1"
OUTFILE="${2:-${ZIPFILE%.zip}.tgz}"

TMPDIR=$(mktemp -d)
unzip -q "$ZIPFILE" -d "$TMPDIR"
tar -C "$TMPDIR"/release -czf "$OUTFILE" .
rm -rf "$TMPDIR"

echo "Created $OUTFILE"