#!/bin/bash -l
# Copyright (C) 2016 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR


# stable version is shown on:
# https://dist.torproject.org/torbrowser/

ver=$(curl -s https://dist.torproject.org/torbrowser/ \
          | sed -rn 's/.*href="([0-9]+\.[0-9]+).*/\1/p' \
          | sort -Vr | head -n 1)


# by default it has perms for just 1 non-root user, which is ok for now.

cd /a/opt

f=tor-browser-linux64-${ver}_en-US.tar.xz
timestamp=$(stat -c %Y $f) ||:
wget -N https://www.torproject.org/dist/torbrowser/$ver/$f
new_timestamp=$(stat -c %Y $f) ||:
if [[ $timestamp == $new_timestamp && -e /a/opt/tor-browser_en-US/Browser/start-tor-browser ]]; then
    # already installed
    exit 0
fi
rm -rf tor-browser_en-US
ex $f

for x in tor-*.tar.xz; do
    # cleanup old tarballs
    [[ -e $x ]] || break
    [[ $x != $f ]] || continue
    command rm -f $x
done
s lnf /a/opt/tor-browser_en-US/Browser/start-tor-browser /usr/local/bin