#!/bin/sh

# script for updating OTRS on FreeBSD within the same major release, e.g. 6.0.16 -> 6.0.17

DEST_VERSION="$1"
OTRS_USER="${2:-otrs}"
OTRS_DIR="$3"
CURR_VERSION="$4"

if [ -z "$DEST_VERSION" -o "$DEST_VERSION" = "-h" -o "$DEST_VERSION" = "--help" ]; then
  echo "Usage: upgrade_otrs.sh <dest version> [<otrs user> [<otrs directory> [<current version>]]]"
  exit 1
fi

if [ -z "$OTRS_DIR" ]; then
  OTRS_DIR=`su -m nobody -c "echo ~$OTRS_USER"` || exit 1
fi

# try to get current version from RELEASE file inside the installation directory
if [ -z "$CURR_VERSION" ]; then
  while read L; do
    VERSION="${L#VERSION = }"
    if [ "$VERSION" != "$L" ]; then
        CURR_VERSION="$VERSION"
     fi
  done < "$OTRS_DIR"/RELEASE || exit 1
fi

if [ -z "$CURR_VERSION" ]; then
  echo "Unable to determine the currently installed OTRS version in $OTRS_DIR" >&2
  exit 1
fi

CURR_PACKAGE="otrs-$CURR_VERSION"
DEST_PACKAGE="otrs-$DEST_VERSION"
CURR_TARBALL="${CURR_PACKAGE}.tar.bz2"
DEST_TARBALL="${DEST_PACKAGE}.tar.bz2"

# fetch tarballs of current and new version
if [ ! -f "$CURR_TARBALL" ]; then
  fetch "http://ftp.otrs.org/pub/otrs/$CURR_TARBALL" || exit 1
fi
if [ ! -f "$DEST_TARBALL" ]; then
  fetch "http://ftp.otrs.org/pub/otrs/$DEST_TARBALL" || exit 1
fi

TMP_DIR=`mktemp -d` || exit 1
CURR_DIR="$TMP_DIR"/"$CURR_PACKAGE"
DEST_DIR="$TMP_DIR"/"$DEST_PACKAGE"

echo "Extracting $CURR_PACKAGE to $CURR_DIR"
tar -C "$TMP_DIR" -xjSf "$CURR_TARBALL" || exit 1
rm "$CURR_TARBALL" || exit 1

echo "Extracting $DEST_PACKAGE to $DEST_DIR"
tar -C "$TMP_DIR" -xjSf "$DEST_TARBALL" || exit 1
# keep tarball of new version for next upgrade

service apache24 onestatus && { service apache24 onestop || exit 1; }
crontab -l -u "$OTRS_USER" && { crontab -r -f -u "$OTRS_USER" || exit 1; }
su -m "$OTRS_USER" -c "'$OTRS_DIR'/bin/otrs.Daemon.pl stop" || exit 1
su -m "$OTRS_USER" -c "'$OTRS_DIR'/bin/otrs.Console.pl Maint::Cache::Delete" || exit 1
su -m "$OTRS_USER" -c "'$OTRS_DIR'/bin/otrs.Console.pl Maint::Loader::CacheCleanup" || exit 1
su -m "$OTRS_USER" -c "'$OTRS_DIR'/bin/otrs.Console.pl Maint::WebUploadCache::Cleanup" || exit 1

# once again to make sure daemon is not running anymore
su -m "$OTRS_USER" -c "'$OTRS_DIR'/bin/otrs.Daemon.pl stop" || exit 1
pkill -f "$OTRS_DIR"

cd "$OTRS_DIR" || exit 1
echo "Removing files from $OTRS_DIR that are vanilla $CURR_VERSION ones"
find . -type f | while read L; do
  [ -f "$CURR_DIR"/"$L" ] && cmp -s "$L" "$CURR_DIR"/"$L" && { rm "$L" || exit 1; }
done

echo "Installing new files from $DEST_VERSION"
cp -ai "$DEST_DIR"/ "$OTRS_DIR"/ || exit 1
rm -r "$TMP_DIR" || exit 1

"$OTRS_DIR"/bin/otrs.SetPermissions.pl --admin-group=`id -gn 0` || exit 1
su -m "$OTRS_USER" -c "'$OTRS_DIR'/bin/otrs.Console.pl Maint::Config::Rebuild" || exit 1
su -m "$OTRS_USER" -c "'$OTRS_DIR'/bin/otrs.Console.pl Maint::Config::Sync" || exit 1

"$OTRS_DIR"/bin/Cron.sh start "$OTRS_USER" || exit 1
service apache24 onestart || exit 1

echo "Done."