#!/bin/bash
# Update SVN on base virtual machine
#
# Example usage:
#    vn-svnupdate 
#
# Approach:
# 1. svn update on host
# 2. Start base VM
# 3. Login to base VM
# 4. svn update 
# 5. poweroff
# 6. Delete base snapshot if exists
#
# For more info see: http://sandilands.info/sgordon/virtnet
#
# $Revision: 21 $
# $Author: sgordon $
# $Date: 2013-09-20 15:12:13 +0700 (Fri, 20 Sep 2013) $
# $URL: https://sandilands.info/svn/virtnet/bin/host/vn-newnode $

# Internet access is required

echo "vn: Internet access is required to update the host and base virtual machine."
echo "vn: Ensure you have internet access before proceeding."
echo "vn: Are you ready to proceed? y/n"

read proceed

if [ "${proceed}" != "y" ]; then
	echo "vn: Exiting vn-updatebase as user is not ready to proceed.";
	exit 1;
fi

# Script parameters
# Path for virtnet directory on host, e.g. /home/user/svn/virtnet/
virtnethostpath="`dirname $BASH_SOURCE`/../../"
# Path for virtnet directory on guest, e.g. /home/network/virtnet
virtnetpath="/home/network/virtnet"

# Update svn on host
echo "vn: Getting current SVN info on host ..."
svn info ${virtnethostpath} 2> /dev/null
svnpathwrong=$?
if [ "${svnpathwrong}" != "0" ]; then
	echo "vn: Either svn is misconfigured/not installed on the host or not installed in"
	echo "vn: ${virtnethostpath}."
	echo "vn: If the path is wrong, try to edit this script (vn-svnupdate) and change "
	echo "vn: the parameter virtnethostpath."
	exit 1;
fi
echo "vn: About to update SVN on host ..."
svn update ${virtnethostpath}
echo "vn: Take note of the revision number in the above line that says: "
echo "vn: 'Updated to revision X' or 'At revision X.'"
#svn info ${virtnethostpath}

# Check if base exists
echo "vn: Checking that base VM exists; starting if not already running ..."
VBoxManage list vms | grep "\"base\"" > /dev/null
basenotexist=$?
if [ "${basenotexist}" != "0" ]; then
	echo "vn: base virtual machine does not exist. See http://sandilands.info/sgordon/virtnet"
	echo "vn: for installing the base virtual machine."
	exit 1;
fi

# Start base if not already running
VBoxManage list runningvms | grep "\"base\"" > /dev/null
isrunning=$?
if [ "${isrunning}" = "1" ]; then
	VBoxManage startvm --type headless base
fi

echo "vn: About to login to base VM and update SVN (may take a few minutes) ..."

# Login to base and perform operations
ssh -o "StrictHostKeyChecking no" -l network -p 2201 -i ${virtnethostpath}/data/defaults/home/network/.ssh/id_rsa localhost 'svn cleanup '${virtnetpath}
ssh -o "StrictHostKeyChecking no" -l network -p 2201 -i ${virtnethostpath}/data/defaults/home/network/.ssh/id_rsa localhost 'svn update '${virtnetpath}
echo "vn: You should see 'Updated to revision Y' or 'At revision Y.' "
echo "vn: Compare the revision number Y to the revision X above. They should be the same."

# Poweroff base
VBoxManage controlvm base poweroff
echo "vn: base has now been updated and turned off."

echo "vn: Deleting the base snapshot (it will be auto-created when running vn-createtopology)"

# Delete the base snapshot of it exists
VBoxManage snapshot base list 2> /dev/null
snmatch=$?
if [ "${snmatch}" = "0" ]; then # Has snapshots
	# Delete snapshot
	VBoxManage snapshot base delete base
fi

echo "vn: Update is finished."