Update Ghost CMS – script on / for uberspace

update_ghost.sh

#!/bin/bash
#set -v
# created by peleke.de
# modified by @fschoenfeldt - 27.11.2019 & 09.04.2023
GHOSTDIR=~/blog
PACKAGE_VERSION_OLD=$(sed -nE 's/^\s*"version": "(.*?)",$/\1/p' $GHOSTDIR/current/package.json)
CURRENT_GHOST=$(curl -s https://api.github.com/repos/TryGhost/Ghost/releases | grep tag_name | head -n 1 | cut -d '"' -f 4)
CURRENT_GHOST_DOWNLOAD=$(curl -s https://api.github.com/repos/TryGhost/Ghost/releases/latest | grep zipball_url | cut -d '"' -f 4)
CURRENT_GHOST_FILE=$(echo $CURRENT_GHOST_DOWNLOAD | sed 's:.*/::').zip
echo "installed version: $PACKAGE_VERSION_OLD"
echo "available version: $CURRENT_GHOST"
cd $GHOSTDIR
if [[ $CURRENT_GHOST != $PACKAGE_VERSION_OLD ]]
then
  read -r -p "Do you want to update Ghost $PACKAGE_VERSION_OLD to version $CURRENT_GHOST? [Y/n] " response
  if [[ $response =~ ^([yY]|"")$ ]]
  then
    echo "downloading and unpacking ghost $CURRENT_GHOST ..."
    cd $GHOSTDIR/versions/
    curl -Lk $CURRENT_GHOST_DOWNLOAD -o $CURRENT_GHOST_FILE
    unzip $GHOSTDIR/versions/$CURRENT_GHOST_FILE -d $CURRENT_GHOST
    rm $GHOSTDIR/versions/$CURRENT_GHOST_FILE
    echo "Updating ghost ..."
    cd $GHOSTDIR/versions/$CURRENT_GHOST
    # release zip contains a subdir called `TryGhost-Ghost-<HASH>`
    # we want all the necessary files in the current directory though
    mv */* .
    yarn install --production --prefix ghost/core
    echo "Migrating ghost database ..."
    cd $GHOSTDIR
    NODE_ENV=production knex-migrator migrate --mgpath $GHOSTDIR/versions/$CURRENT_GHOST/ghost/core
    ln -sfn $GHOSTDIR/versions/$CURRENT_GHOST/ghost/core $GHOSTDIR/current
    PACKAGE_VERSION=$(sed -nE 's/^\s*"version": "(.*?)",$/\1/p' $GHOSTDIR/current/package.json)
    echo "Ghost $PACKAGE_VERSION_OLD has been updated to version $PACKAGE_VERSION"
    echo "Restarting Ghost. This may take a few seconds ..."
    supervisorctl restart blog
    supervisorctl status
    echo "If something seems wrong, please check the logs: 'supervisorctl tail ghost'"
    echo "To revert to version $PACKAGE_VERSION_OLD run the following command: 'ln -sfn $GHOSTDIR/versions/v$PACKAGE_VERSION_OLD $GHOSTDIR/current' and restart ghost using 'supervisorctl restart ghost'."
  fi
else
  echo "-> Ghost is already up-to-date, no update needed."
fi