run

#!/usr/bin/with-contenv bash
# shellcheck shell=bash

# make our folders
mkdir -p \
    /config/www \
    /gallery/upload \
    /gallery/galleries

# Migrate old data
if [[ -f /gallery/index.php ]]; then
    echo "*******************************************************************************"
    echo ""
    echo "Migrating old install..."
    mv /gallery/_data/ /config/www/_data
    mv /gallery/language/ /config/www/language
    mv /gallery/plugins/ /config/www/plugins
    mv /gallery/themes/ /config/www/themes
    mv /gallery/local/ /config/www/local
    mv /gallery/template-extension/ /config/www/template-extension
    rm /gallery/index.php
    rm /config/www/gallery
    sed -i "s|root /config/www/gallery;|root /app/www/public;|" /config/nginx/site-confs/default.conf
    echo "Migration completed."
    echo ""
    echo "You can now safely delete everything in /gallery *except* for the upload and"
    echo "galleries directories. If your photos are stored elsewhere you can ignore this."
    echo ""
    echo "*******************************************************************************"
fi

shopt -s globstar dotglob

symlinks=(
    /app/www/public/upload
    /app/www/public/galleries
)

for i in "${symlinks[@]}"; do
    if [[ -d /gallery/"$(basename "$i")" && ! -L "$i" ]]; then
        rm -rf "$i"
    fi
    if [[ -d /gallery/"$(basename "$i")" && ! -L "$i" ]]; then
        ln -s /gallery/"$(basename "$i")" "$i"
    fi
done

# Update standard pages & default theme
if [[ -d /config/www/themes ]]; then
    cp -R /app/www/public/themes/standard_pages/ /config/www/themes/
    cp -R /app/www/public/themes/default/ /config/www/themes/
fi

symlinks=(
    /app/www/public/language
    /app/www/public/plugins
    /app/www/public/local
    /app/www/public/themes
    /app/www/public/_data
    /app/www/public/template-extension
)

for i in "${symlinks[@]}"; do
    if [[ -d /config/www/"$(basename "$i")" && ! -L "$i" ]]; then
        rm -rf "$i"
    fi
    if [[ ! -d /config/www/"$(basename "$i")" && ! -L "$i" ]]; then
        mv "$i" /config/www/
    fi
    if [[ -d /config/www/"$(basename "$i")" && ! -L "$i" ]]; then
        ln -s /config/www/"$(basename "$i")" "$i"
    fi
done

shopt -u globstar dotglob

# copy config
if [[ ! -f "/config/www/local/config/config.inc.php" ]]; then
    cp /app/www/public/include/config_default.inc.php /config/www/local/config/config.inc.php
fi

# permissions
lsiown -R abc:abc \
    /config \
    /gallery