transfer() {
    if [ $# -eq 0 ]; then
        echo "No arguments specified.\nUsage:\n transfer <file|directory>\n ... | transfer <file_name>" >&2
        return 1
    fi
    if tty -s; then
        file="$1"
        file_name=$(basename "$file" | sed 's/ /%20/g')
        if [ ! -e "$file" ]; then
            echo "$file: No such file or directory" >&2
            return 1
        fi
        if [ -d "$file" ]; then
            echo "directory upload temporarily disabled" >&2
            return 1
            file_name="$file_name.zip"
            (cd "$file" && zip -r -q - .) | curl --progress-bar --upload-file "-" "https://transfer.archivete.am/$file_name" | tee /dev/null
        else
            zstd_tmp=$(mktemp)
            zstd -f "$file" -o "$zstd_tmp"
            echo $(curl -sS --upload-file $zstd_tmp "https://transfer.archivete.am/$file_name.zst" | sed 's/\.zst$//')
            rm "$zstd_tmp"
        fi
    else
         file_name=$1
         curl --progress-bar --upload-file "-" "https://transfer.archivete.am/$file_name" < "$file" | tee /dev/null
         return 1
    fi
}