#!/bin/bash
#
# Owncloud software upgrader.
# See http://doc.owncloud.org/server/7.0/admin_manual/maintenance/upgrade.html
#

# Config parameters
BASENAME="`basename $0`"
OLD_VERSION="$1"
VERSION="$2"

# Syntax check
if [ -z "$2" ]; then
  echo "usage: $BASENAME <old-version> <new-version>"
  exit 1
fi

# Check installed versions
if [ ! -d "owncloud-$OLD_VERSION" ]; then
  echo "error: owncloud-$OLD_VERSION is not installed, aborting."
  exit 1
elif [ -d "owncloud-$VERSION" ]; then
  echo "error: owncloud-$VERSION already installed, aborting."
  exit 1
fi

# Download package
wget https://download.owncloud.org/community/owncloud-$VERSION.tar.bz2

# Decompress
(
  mkdir tmp
  cd tmp
  tar xvf ../owncloud-$VERSION.tar.bz2
  mv owncloud ../owncloud-$VERSION
  cd ..
  rmdir tmp
)

# Remove package
rm owncloud-$VERSION.tar.bz2

# Sync configuration
chown -R root: owncloud-$VERSION
rsync -av owncloud-$OLD_VERSION/config/ owncloud-$VERSION/config/

# Symlink to contrib content
(
  cd owncloud-$VERSION
  ln -s ../contrib
  rm -rf themes
  ln -s contrib/themes
)

# Pivot
rm owncloud && ln -s owncloud-$VERSION owncloud

# Audit
echo "Audit:" && \
du -hs owncloud-$OLD_VERSION && \
du -hs owncloud-$VERSION

# Finish
echo "Please fix config.php manually."