download and unpack phrack issues

phrack-download.sh

#!/usr/bin/env bash

set -exuo pipefail

latest_issue="70"

curl \
    --location \
    --remote-name \
    --progress-bar \
    --retry 10 \
    --retry-delay 60 \
    --retry-connrefused \
    --continue-at - \
    http://www.phrack.org/archives/tgz/phrack[1-${latest_issue}].tar.gz

for path in "${PWD}"/*; do
    file=$(basename "${path}")
    if ! echo "${file}" | grep --quiet --extended-regexp "phrack[0-9]+\.tar\.gz"; then continue; fi
    dir="issues/${file//[^0-9]/}"
    mkdir -p "${dir}"
    tar xvf "${file}" --directory "${dir}"
    rm -f "${file}"
done