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ansible/misc/blocklists/append_ipv4.sh

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#!/usr/bin/env bash
set -euo pipefail;
LIST_FILE="$(dirname "$0")/ipv4.txt";
TMP_FILE="$(mktemp)";
IP_REGEX='(?<!\d)\d+(\.\d+){3}(?!\d)';
cat "$LIST_FILE" "$@" |
grep --only-matching --perl-regexp "$IP_REGEX" |
sort --version-sort |
uniq > "$TMP_FILE";
echo "$TMP_FILE";
if diff "$LIST_FILE" "$TMP_FILE"; then
echo "No differences found!";
exit 0;
fi
echo "Press enter to approve changes, ^C to abort";
read;
mv "$TMP_FILE" "$LIST_FILE";