diaspora setup on TKL lamp

#!/bin/bash
#
apt_prepare()
{
    if [ $exist = 0 ] ; then
      echo "deb http://ppa.launchpad.net/maco.m/ruby/ubuntu lucid main" >>$apt_srcfn
      apt-key adv --keyserver keyserver.ubuntu.com --recv 85960EAD
    fi
    apt-get update
}

apt_install()
{
    DEBIAN_FRONTEND=noninteractive apt-get -y \
        -o DPkg::Options::=--force-confdef \
        -o DPkg::Options::=--force-confold \
        --no-install-recommends \
       install $@
}
cleanup_apt()
{
    rm -r /var/cache/apt/*
    mkdir /var/cache/apt/archives
    mkdir /var/cache/apt/archives/partial
}

make_startscript()
{
  cat <<EOF
#!/bin/bash
#
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
cd /root/git/diaspora
#
# -- check if already running
pid=\$(ps awx | grep 'thin start -p 3000' | grep -v grep | awk '{print \$1}')
if [ -n "\$pid" ] ; then
   echo "Killing current running diaspora version"
   kill \$pid
fi
#
# test if we need to sync first
if [ "\$1" = "update"  ] ; then
   echo "Updating version...."
   git pull
   bundle install
   bundle update
fi
#
echo "Starting Diaspora "
cd /root/git/diaspora
./script/server
# --- give it some time...
sleep 5
echo "Done"
#
exit 0
EOF
}
#
#
apt_srcfn=/etc/apt/sources.list.d/sources.list
apt_prepare
#
apt_install build-essential libxslt1.1 libxslt1-dev libxml2
apt_install libmysqlclient-dev libmysql-ruby
apt_install ruby-full
apt_install libssl-dev libopenssl-ruby libcurl4-openssl-dev
apt_install imagemagick libmagickwand-dev
apt_install libsqlite3-dev libpq-dev libreadline5-dev
apt_install git-core
apt_install redis-server
apt_install libffi-dev libffi-ruby
#
apt_install rubygems
gem install bundler --no-ri --no-rdoc
gem install oauth2 --no-ri --no-rdoc
gem install omniauth --no-ri --no-rdoc
#
# check bundler
ln -s /var/lib/gems/1.8/bin/bundle /usr/local/bin/bundle
PATH=$PATH:/usr/local/bin
#
[ ! -d /root/git ] && mkdir /root/git
cd /root/git
[ ! -d /root/git/diaspora ] &&  git clone http://github.com/diaspora/diaspora.git
cd diaspora
export DB="mysql"
bundle install --without development test
bundle update
#
make_startscript >/root/diaspora.sh
chmod 0700 /root/diaspora.sh
#
# simple way to start it automatically
#echo "/root/diaspora.sh >/root/diaspora_rclocal.log 2>&1" >/etc/rc.local
echo "exit 0" >>/etc/rc.local
#
# tell the world what we've done!
#echo 'TKL Diaspora' >> /etc/issue
#
cleanup_apt
#
echo "Done"
#EOF