File OpenTESArena-downloader of Package OpenTESArena

#!/bin/sh
ZIP_URL="https://cdnstatic.bethsoft.com/elderscrolls.com/assets/files/tes/extras/Arena106Setup.zip"
DATADIR="/usr/share/OpenTESArena"
UNZIP=$(which unzip)
[ $? -ne 0 ] && {
	UNZIP="$(which 7zr) x"
	[ $? -ne 0 ] && {
		echo "Neither unzip nor 7zr found, please install one of them"
		exit 1
	}
}
UNRAR=$(which unrar)
[ $? -ne 0 ] && {
	echo "unrar not found, please install it"
	exit 1
}

echo "This script will download and install the original data files from Bethesda."
echo -n "Continue (y/N)? "
read -n 1 ans
[ "x$ans" != "xy" -a "x$ans" != "xY" ] && exit 1
echo ""

OVERRIDE="false"
echo "Data will be installed into: $DATADIR"
if [ -d "$DATADIR/ARENA" ]; then
	if ls -1qA "$DATADIR/ARENA" | grep -q .; then
		echo -n "Data already exists, do you want to continue and overide it (y/N)? "
		read -n 1 ans
		[ "x$ans" != "xy" -a "x$ans" != "xY" ] && exit 1
		OVERRIDE="true"
		echo ""
	fi
fi

# If something goes wrong die
set -e

dir=$(mktemp -dq)
pushd "$dir" > /dev/null
echo -n "Downloading the data files... "
wget "$ZIP_URL" > /dev/null 2>&1
echo "ok"

echo -n "Extracting zip..."
$UNZIP Arena106Setup.zip > /dev/null
echo "ok"
echo -n "Extracting data from exe..."
$UNRAR x *.exe > /dev/null
echo "ok"

set +e
echo -n "Please read the license (press any key)"
read -n 1 ans
echo""
pdftotext -l 1 *.pdf - | less || xdg-open *.pdf
set -e
echo -n "Do you accept the license (y/N)? "
read -n 1 ans
[ "x$ans" != "xy" -a "x$ans" != "xY" ] && {
	popd
	rm -r "$dir"
	exit 1
}
echo ""

echo "Installing data files needs root"
set -x
$OVERRIDE && sudo rm -r "$DATADIR/ARENA"
sudo mkdir -p "$DATADIR"
sudo mv ./ARENA "$DATADIR"
set +x
popd > /dev/null

rm -rf "$dir"
set +e

echo "DONE! You can now start OpenTESArena.
Have fun!"