DokuWiki Upgrade

#!/bin/bash
 
dokuwikiDir=data
backupDir=backups
releaseDir=releases
 
deleteInstallPhp=true
 
# Making sure directories exist
[[ -d $backupDir ]] || mkdir $backupDir
[[ -d $releaseDir ]] || mkdir $releaseDir
 
curTime=$(date '+%F_%T' | tr -d ':')
 
backupFile=$backupDir/${dokuwikiDir}_${curTime}_backup.tar.gz
echo "Creating backup from ./$dokuwikiDir to ./$backupFile"
tar --use-compress-program="pigz -9 -k" -cf $backupFile $dokuwikiDir
 
echo "Getting version of stable release from download.dokuwiki.org"
version=$(curl -s https://download.dokuwiki.org/ | grep "dokuwiki-stable.tgz" -A 1 | tail -n 1 | sed -E 's/.*hint">(.*) .*<\/span>.*/\1/')
echo "Latest stable version is: $version"
 
releaseFile=$releaseDir/dokuwiki-stable-$version.tgz
echo "Fetching release to ./$releaseFile"
wget -q https://download.dokuwiki.org/src/dokuwiki/dokuwiki-stable.tgz -O $releaseFile
 
echo "Extracting tarball"
tar zxf $releaseFile
 
echo "Copying contents of new release"
'cp' -af dokuwiki-$version/* $dokuwikiDir
 
echo "Deleting unused files"
grep -Ev '^($|#)' $dokuwikiDir/data/deleted.files | xargs -n 1 rm -vf
 
if [[ $deleteInstallPhp == "true" ]]; then
  echo "Deleting install.php"
  rm -f $dokuwikiDir/install.php
fi
 
echo "Fixing directory and file permissions"
find data/ -type d -exec chown www-data:www-data {} \;
find data/ -type f -exec chown www-data:www-data {} \;
 
find data/ -type d -exec chmod 0755 {} \;
find data/ -type f -exec chmod 0644 {} \;
 
echo "Finished"