variant_two.sh

#!/usr/bin/env bash

# developed for TheDifferent by Florian Kleber for terms of use have a look at the LICENSE file

# terminate on errors
set -xe

# define as docker compose var or default ""
WP_BACKUP_URL=${WP_BACKUP_URL:-}

# check if volume is not empty
if [ ! -f /var/www/wp-content/index.php ]; then

    # check if BACKUP_URL exists by downloading the first byte
    if [[ $(wget -S --spider $1  2>&1 | grep 'HTTP/1.1 200 OK') ]]; then
        # download backup from backup url
        wget -qO- "$WP_BACKUP_URL" | tar zxC /var/www
    else
        echo 'Setting up wp-content directory'
        # copy wp-content from Wordpress src to directory
        cp -r /usr/src/wordpress/* /var/www/
    fi
    
    # set owner to nobody
    chown -R nobody:nogroup /var/www
    # generate wordpress secrets
    wget https://api.wordpress.org/secret-key/1.1/salt/ -O ->> /usr/src/wordpress/wp-secrets.php
fi

# execute CMD[]
exec "$@"