#/bin/bash

PROJECT_NAME=my_website
WORKSPACE=/var/www
USERNAME=www-data
PORT=22
DATEMARK=`date +%Y%m%d%H%M%S`

HOSTNAME=www.example.com

CURRENT_VERSION="${WORKSPACE}/${PROJECT_NAME}"
CURRENT_SNAPSHOT="${WORKSPACE}/${DATEMARK}"
SNAPSHOT_ARCHIVE="${CURRENT_SNAPSHOT}.tar.gz"

REMOTE_CONNECTION="${USERNAME}@${HOSTNAME}"
REMOTE_WORKSPACE="${USERNAME}@${HOSTNAME}:${WORKSPACE}"

scp -P $PORT -r HEAD.tar.gz $REMOTE_WORKSPACE

ssh -p $PORT $REMOTE_CONNECTION mkdir -p "$CURRENT_SNAPSHOT"

ssh -p $PORT $REMOTE_CONNECTION cp -r $CURRENT_VERSION $CURRENT_SNAPSHOT

#
ssh -p $PORT $REMOTE_CONNECTION tar -czf $SNAPSHOT_ARCHIVE $CURRENT_SNAPSHOT
ssh -p $PORT $REMOTE_CONNECTION rm -rf $CURRENT_SNAPSHOT

#
ssh -p $PORT $REMOTE_CONNECTION mv $CURRENT_VERSION $CURRENT_SNAPSHOT
ssh -p $PORT $REMOTE_CONNECTION rm -rf $CURRENT_SNAPSHOT

#
ssh -p $PORT $REMOTE_CONNECTION tar -xzf $WORKSPACE/HEAD.tar.gz -C $WORKSPACE
ssh -p $PORT $REMOTE_CONNECTION rm $WORKSPACE/HEAD.tar.gz