Downloading and Decompressing an Archive in One Command

untar_url.sh

#!/usr/bin/env bash
set -eu

## untar_url <archive_url> <dest_dir> [<nb_components_to_strip>]
##
## Downloads an archive from <archive_url> and decompresses it in <dest_dir>
##
##  @param archive_url            archive url
##  @param dest_dir               directory in which to decompress the archive (created if not existing)
##  @param nb_components_to_strip number of components to strip from file names on extraction. Default=1
##
## @see https://general-purpose.io/2017/02/09/downloading-and-decompressing-an-archive-in-one-command/
function untar_url()
{
    if [ "$#" != "2" -a "$#" != "3" ] ; then
        >&2 echo "Wrong argument count"
        >&2 echo "Usage: ${FUNCNAME[0]} <archive_url> <dest_dir> [<nb_components_to_strip>]"
        return 1
    fi

    local archive_url="$1"
    local dest_dir="$2"
    local nb_components_to_strip="${3-1}"
    local file_size="$(wget --spider "${archive_url}" 2>&1 | grep Length | awk '{print $2}')"

    mkdir -p "${dest_dir}"
    wget -qO- "${archive_url}" | pv -s "${file_size}" | tar xzf - -C "${dest_dir}" --strip-components "${nb_components_to_strip}"
}

untar_url "$@"