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#!/bin/sh
[ ! -f "$1" ] &&
echo "Give \`sup\` a page which has been added/updated." &&
exit 1
website="https://domain.com"
rssfile="../rss/blog.xml"
replchar='^'
link="$website/$1"
title="$(sed -n 's/<title>\(.*\)<\/title>/\1/Ip' "$1")"
if grep -q "<guid.*>$link</guid>" "$rssfile"; then
guid="$link#$(date '+%y%m%d%H%M%S')"
title="$title (Updated)"
echo "Explain the nature of the update:"
read -r content
[ -z "$content" ] && content="New updates to $link"
else
guid=$link
content="$(tr '\n' $replchar < "$1" | sed "
s/.*<body>//
s/<footer>.*<\/footer>//
s/<nav>.*<\/nav>//
s/<\/body>.*//
" | tr -s $replchar '\n')"
fi
rssdate="$(LC_TIME=en_US date '+%a, %d %b %Y %H:%M:%S %z')"
temp="$(mktemp)";
trap 'rm -f "$temp"' 0 1 2 3 15
echo "
<item>
<title>$title</title>
<guid>$guid</guid>
<link>$link</link>
<pubDate>$rssdate</pubDate>
<description><![CDATA[$content
]]></description>
</item>
" > "$temp"
sed -i "/<!-- rss -->/r $temp" "$rssfile"
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