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#!/bin/bash
#
# Download the Tor Browser Bundle.
#

# Parameters
BASENAME="`basename $0`"
APPS="$HOME/apps"
APP_BASE="$APPS/tor-browser"
TEMP="$TMP/tor-browser"
DL="$HOME/data/apps/distros/tor/"
VERSION="$1"
ARCH="$2"
LANG="$3"
BASE_URL="https://www.torproject.org/dist/torbrowser/$VERSION"

# Syntax check
if [ -z "$VERSION" ]; then
  echo "usage: $BASENAME <version> [arch] [lang]"
  echo "example: $BASENAME 2.3.25-14-dev linux64 en-US"
  exit 1
fi

# Set arch
if [ -z "$ARCH" ]; then
  ARCH="linux64"
fi

# Set lang
if [ -z "$LANG" ]; then
  LANG="en-US"
fi

# Set file names
FILE="tor-browser-$ARCH-$VERSION"_"$LANG.tar.xz"
SIGN="$FILE.asc"

# Check existing installation
if [ -d "$APP_BASE/$ARCH-$VERSION" ]; then
  echo "TBB version $VERSION for $ARCH already installed"
  exit 1
fi

# Temp folder
mkdir -p $TEMP

# Download package
if [ ! -e "$DL/$FILE" ]; then
  wget -c $BASE_URL/$FILE -O $DL/$FILE || exit 1
fi

# Download signature
if [ ! -e "$DL/$SIGN" ]; then
  wget -c $BASE_URL/$SIGN -O $DL/$SIGN || exit 1
fi

# Check signature
gpg --verify $DL/$SIGN $DL/$FILE || exit 1

# Unpack
( cd $TEMP && tar xf $DL/$FILE ) || exit 1

# Move and symlink
mv $TEMP/tor-browser_$LANG $APP_BASE/$ARCH-$VERSION
rm -rf $APP_BASE/$ARCH && \
( cd $APP_BASE && ln -sf $ARCH-$VERSION $ARCH )

# Cleanup
rm -rf $TEMP
echo "Please check and cleanup old versions at $APP_BASE"