update

TEMP_DIR=/tmp/temp/blogit
CONFIG_FILE=.blogit
CURRENT_DIR=`pwd`

echo "==> Cleaning directory with another releases"
rm -rf ${TEMP_DIR}

echo "==> Cloning repository into ${TEMP_DIR}"
git clone git@github.com:xepozz/blogit ${TEMP_DIR}

LAST_RELEASE=`cat ${TEMP_DIR}/.git/refs/heads/master`
echo "[Info] Last release hash: ${LAST_RELEASE}"

if [ -f ${CONFIG_FILE} ]
then
. ${CONFIG_FILE}
fi

echo "[Info] Current release hash: ${CURRENT_RELEASE}"

if [[ "${LAST_RELEASE}" = "${CURRENT_RELEASE}" ]]
then
  echo "[Info] System is up to date"
else
  echo "==> Caught updates, trying to apply..."
  cd ${TEMP_DIR}
  git diff --unified=0 ${CURRENT_RELEASE} ${LAST_RELEASE} > ${TEMP_DIR}/.patch
  cd ${CURRENT_DIR}
  patch -p1 < ${TEMP_DIR}/.patch

  if [[ $? -eq 0 ]]
  then
    echo ""
    echo "[Info] System was updated successfully"
    echo "[Info] Please review updates and commit them"
    echo ""
  else
    echo ""
    echo "[Warning] Updates conflicts with your system"
    echo "[Warning] Files with conflicts: `git status --short | grep "^UU "`"
    echo ""
  fi

  echo ""
  echo "==> Saving last release hash ${LAST_RELEASE}"
  if [ -f ${CONFIG_FILE} ]
  then
    sed -i "s/CURRENT_RELEASE=.*/CURRENT_RELEASE=${LAST_RELEASE}/g" ${CONFIG_FILE}
  else
    echo "CURRENT_RELEASE=${LAST_RELEASE}" > ${CONFIG_FILE}
  fi

  echo "[Info] Update completed"
fi