#!/bin/bash

make_pw() {
    LEN=16
    PW=`openssl rand -hex $LEN`
    echo $PW
}

if [[ ! $EUID -eq 0 ]]; then
    echo "You need to be running this as root..."
    exit 1
fi

#various config and users and stuff...
NOW=`date`
DEST=${DEST:-/opt/stack}
LOG_LOC="/tmp"
USERMADE="stack"

#take the first IP we find as the ip to use... (not localhost)
MYIP=`ifconfig  | grep -i 'inet addr:' | grep -v '127.0.0.1' | cut -d: -f2 | awk '{print $1}' | head -n 1`

if [ -z "$MYIP" ]; then
    echo "You have no IP?"
    exit 1
fi

echo "Doing devstack install on $NOW"

#this might fail...
PW=`getent passwd $USERMADE`

#now turn erroring on...
set -o errexit

echo "Generating passwords..."
LOGFILE=$LOG_LOC/devstack-install.log
MYSQL_PASSWORD=$(make_pw)
RABBIT_PASSWORD=$(make_pw)
SERVICE_TOKEN=$(make_pw)
ADMIN_PASSWORD=$(make_pw)
SWIFT_HASH=$(make_pw)

#branch support, ie replace with "master@{2011-12-14 12:00}"
BRANCH=""

echo "Settings are the following..."
echo "LOGFILE = $LOGFILE"
echo "IP = $MYIP"
echo "MYSQL_PASSWORD = $MYSQL_PASSWORD"
echo "RABBIT_PASSWORD = $MYSQL_PASSWORD"
echo "SERVICE_TOKEN = $SERVICE_TOKEN"
echo "ADMIN_PASSWORD = $ADMIN_PASSWORD"
echo "SWIFT_HASH = $SWIFT_HASH"

if [ -n "$BRANCH" ]; then
    echo "USING BRANCH = $BRANCH"
fi

#give chance to see settings...
sleep 5

if [ -n "$PW" ]; then

    echo "Cleaning up old instances..."

    SCREENS=`sudo -u $USERMADE screen  -list 2>/dev/null | grep -Pi "\\d+\.stack" |  cut -f 2`

    for scr in $SCREENS
    do
        echo "Killing screen $scr..."
        sudo -u $USERMADE screen -r $scr -X kill
        sleep 5
        echo "Quitting screen $scr..."
        sudo -u $USERMADE screen -r $scr -X quit
        sleep 5
    done

fi

echo "Purging the database..."

#this seems harsh but its what i go to work..
apt-get -y purge mysql*

echo "Removing installed directories & some files adjusted/created by devstack..."

rm -rf devstack $DEST/* /var/cache/pip /etc/mysql/my.cnf

echo "Autoremoving any other packages..."

apt-get -y autoremove

echo "Installing new packages..."

apt-get install -y openssh-server git apache2

echo "Cloning git..."

git clone git://github.com/cloudbuilders/devstack.git

echo "Making directory location at $LOG_LOC for logfile $LOGFILE..."

mkdir -pv $LOG_LOC/

echo "Saving local overrides..."

echo "#Local overrides" >> ./devstack/localrc
echo "MYSQL_PASSWORD=$MYSQL_PASSWORD" >> ./devstack/localrc
echo "RABBIT_PASSWORD=$RABBIT_PASSWORD" >> ./devstack/localrc
echo "SERVICE_TOKEN=$SERVICE_TOKEN" >> ./devstack/localrc
echo "SWIFT_HASH=$SWIFT_HASH" >> ./devstack/localrc
echo "ADMIN_PASSWORD=$ADMIN_PASSWORD" >> ./devstack/localrc
echo "LOGFILE=$LOGFILE" >> ./devstack/localrc
echo "HOST_IP=$MYIP" >> ./devstack/localrc

#pickup from tags/branch
if [ -n "$BRANCH" ]; then
    echo "Using branch $BRANCH"
    echo "KEYSTONE_BRANCH=$BRANCH"   >> ./devstack/localrc
    echo "GLANCE_BRANCH=$BRANCH"   >> ./devstack/localrc
    echo "SWIFT_KEYSTONE_BRANCH=$BRANCH"   >> ./devstack/localrc
    #echo "NOVNC_BRANCH=$BRANCH"   >> ./devstack/localrc
    echo "NOVA_BRANCH=$BRANCH"   >> ./devstack/localrc
    echo "HORIZON_BRANCH=$BRANCH"   >> ./devstack/localrc
    echo "QUANTUM_BRANCH=$BRANCH"   >> ./devstack/localrc
    #echo "OPENSTACKX_BRANCH=$BRANCH"   >> ./devstack/localrc
fi

echo "About to install devstack..."

echo "Giving you 5 seconds to abort..."

sleep 5

echo "Installing devstack..."

#go!
cd devstack && ./stack.sh