Migrate domain to new domain? A script to verify domains are redirecting 1:1 in new site based on old sitemap.

script.sh

function verify_sitemap_urls() {
    if [ -z "$1" ]; then
        echo "Usage: check_sitemap [file_path/url] (new_domain)"
        echo "If no new domain passed it will use the url from sitemap; if domain is passed then it will replace the domain in sitemap url with same path."
        return
    fi

    if [[ "$1" == *"http"* ]]; then
        TEMPFILE=$(mktemp)
        # Download the sitemap file from the given URL
        curl -s -o $TEMPFILE "$1"
    else
        # Relative path to absolute path in $TEMPFILE from where the function is called.
        TEMPFILE=$(cd $(dirname $1) && pwd)/$(basename $1)
        # check file exists.
        if [ ! -f "$TEMPFILE" ]; then
            echo "File not found: $TEMPFILE"
            return
        fi
    fi

    # Parse the sitemap file and extract all URLS_IN_SITEMAP
    URLS_IN_SITEMAP=($(ggrep -oP '(?<=<loc>).*(?=</loc>)' $TEMPFILE))

    # if url is passed remove the temp file.
    if [[ "$1" == *"http"* ]]; then
        rm $TEMPFILE
    fi

    # Send a request to each URL and check the HTTP status code
    for URL_ENTRY in "${URLS_IN_SITEMAP[@]}"
    do
        # If $2 is empty, use the same domain as sitemap.
        if [ -z "$2" ]; then
            NEW_DOMAIN_URL=$URL_ENTRY
        else
            URL_PATH=$(echo $URL_ENTRY | sed -e 's|^.*://[^/]*||;s|\?.*$||')
            NEW_DOMAIN_URL="$2$URL_PATH"
        fi
        http_status=$(curl -s -o /dev/null -w "%{http_code}" -L "$NEW_DOMAIN_URL")
        if [ $http_status -eq 200 ]
        then
           echo -n "."
           #echo "OK: $NEW_DOMAIN_URL"
        else
           echo -e "\nError: $NEW_DOMAIN_URL returned $http_status"
        fi
    done
}