Update a MediaWiki installation using patch files

mw_patch.sh

#!/bin/bash

confirm () {
    # call with a prompt string or use a default
    read -r -p "${1:-Are you sure? [y/N]} " response
    case $response in
        [yY][eE][sS]|[yY])
            true
            ;;
        *)
            false
            ;;
    esac
}

if [ "$USER" != "root" ]; then
        echo Needs to be run as root.
        exit 1
fi

if [ ! -f LocalSettings.php ]; then
        echo No LocalSettings.php file found.
        echo Please cd to MediaWiki root directory
        exit 1
fi

echo -- Backing up installation.
tar cfz ../../mw_upgrade_$(date +%F_%T).tgz .
echo -- Backup finished.

echo -- Strating dry run of patch.
patch -p 1 --dry-run < $1
echo -- Dry run finished.

echo Do you want to continue with applying the patch?
confirm || exit 1

echo -- Start applying the patch.
patch -p 1 < $1
echo -- Patch applied.

echo Will update database now.
confirm || exit 1

echo -- Updating Database.
php maintenance/update.php --quick -quiet
echo -- Database update finished.