Bash Script to Upgrade Open Atrium

#!/bin/bash
docroot=$1
upgrade_tar=$2
if [[ "$2" -ne 1 ]]; then
    echo "$0: Usage: [docroot directory name] [upgrade_oa.sh path_to_tar]"
    exit 1;
fi
echo "Downloading tar:$1"
curl $2 | tar xz
echo "Successfully downloaded tar"
echo "-------------------"
echo "Backing up and replacing docroot with new Open Atrium core"
mv $1/ old
mv openatrium-7.x*/ $1
echo "New Open Atrium Core in place"
echo "------------------"
echo "Removing new core's sites directory"
rm -rf $1/sites
echo "Restoring sites directory with backup"
mv old/sites/ $1
echo "Successfully restored sites directory from backup"
echo "------------------"
echo "Restoring dotfiles, robots, favicon, and simplesaml from backup"
mv old/.htaccess $1
mv old/.gitignore $1
mv old/robots.txt $1
mv old/robots-dev.txt $1
mv old/favicons_etc/ $1

mv old/simplesaml $1
echo "Successfully restored dotfiles, robots, favicon, and simplesaml from backup"
echo "------------------"
echo "Removing backup and tar..."
rm -rf old/
echo "Successfully removed backup."
echo "Open Atrium has been upgraded."