arch-pkgs/.repo/pkgver/sendmail.sh

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#!/usr/bin/bash
set -e
# check dependencies
count=0
for dependency in curl tr cut grep sed sort tail; do
if [ ! -x "$(command -v $dependency)" ]; then
echo "$dependency missing"
count=$((count+1))
fi
done
# exit script if any dependencies missing
if [ $count -ne 0 ]; then
exit 1
fi
# upstream URL
UPSTREAM_URL="ftp://ftp.sendmail.org/pub/sendmail/"
# options to pass to cURL, including custom user agent
USER_AGENT="sendmail-version-checker/1.0 george@rawlinson.net.nz"
CURL_OPTS=(--ftp-pasv --silent --user-agent "$USER_AGENT")
curl "${CURL_OPTS[@]}" "$UPSTREAM_URL" | tr -s ' ' | cut -d ' ' -f 9 | grep -E "sendmail\..+\.tar\.gz\.sig$" | sed -e 's/^sendmail\.//' -e 's/\.tar\.gz\.sig$//' | sort -n | tail -n 1
exit 0