Automated Mirroring Script, needs a version text on the origin mirror.

mirror.sh

#!/bin/bash
ISO_URL="mirror/iso"
LOCAL_ISO_PATH="/var/www/mirrors/blend/isos/testing/blendOS.iso"
ISO_VERSION_URL="mirror/version"
LOCAL_VERSION_FILE="/var/www/mirrors/blend/isos/testing/version"

download_iso() {
    rm -rf $LOCAL_ISO_PATH
    wget -O "$LOCAL_ISO_PATH" "$ISO_URL"
    wget -O "$LOCAL_VERSION_FILE" "$ISO_VERSION_URL"
}

get_remote_version() {
    wget -O - "$ISO_VERSION_URL"
}

REMOTE_VERSION=$(get_remote_version)
LOCAL_VERSION=$(cat "$LOCAL_VERSION_FILE")

if [ "$REMOTE_VERSION" != "$LOCAL_VERSION" ]; then
    echo "New ISO version detected. Downloading..."
    download_iso
    echo "$REMOTE_VERSION" > "$LOCAL_VERSION_FILE"
else
    echo "ISO is up-to-date."
fi