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#!/bin/sh
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blog_domain='https://blog.kageru.moe/'
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output() {
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echo "$1" >> index.html
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}
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output_rss() {
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echo "$1" >> rss.xml
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}
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add_header() {
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output '<h1>Blog index</h1><table id="linklist">'
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output_rss '<?xml version="1.0" encoding="UTF-8" ?>
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<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en">
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<author><name>kageru</name></author>
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<title>kageru’s blog</title>'
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output_rss " <link href=\"$blog_domain\" rel=\"self\" type=\"application/atom+xml\"/>
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<description>kageru’s blog</description>"
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}
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add_footer() {
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html_entry "legacy" "before 2020" "Older posts"
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output '</table>'
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output_rss '</feed>'
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}
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html_entry() {
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output '<tr>'
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path="$1"
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time="$2"
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title="$3"
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output "<td class=\"first\"><a href=\"$path\">$title</a></td>"
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output "<td class=\"second\">$time</td></tr>"
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}
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rss_entry() {
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# The content is the output minus the first line
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# (which would otherwise be a redundant title in most rss readers)
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# and with escaped html.
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# The sed expression is stolen from https://stackoverflow.com/questions/12873682/12873723#12873723
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output_rss " <entry>
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<title>$1</title>
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<link>$blog_domain$2</link>
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<link href=\"$blog_domain$2\" type=\"text/html\" title=\"$1\"/>
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<content type=\"html\" xml:base=\"$blog_domain$2\">
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$(tail -n+2 "$2" | sed 's/&/\&/g; s/</\</g; s/>/\>/g; s/"/\"/g; s/'"'"'/\'/g')
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</content>
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</entry>"
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}
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create_entry() {
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path="$9"
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outpath="content/$(basename "$path" .md).html"
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# convert new markdown posts to html
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pandoc "$path" -t html -f markdown -o "$outpath"
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# then add it to the index
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title="$(rg 'h1' "$outpath" | head -n1 | rg -o '(?<=>).*(?=<)' --pcre2)"
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created=$(git log --follow --format=%as "$path" | tail -1)
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html_entry "$outpath" "created on $created" "$title"
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rss_entry "$title" "$outpath"
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}
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has_updates() {
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git fetch &> /dev/null
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diff="$(git diff master origin/master)"
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if [ "$diff" ]; then
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return 0
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else
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return 1
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fi
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}
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cd /home/nginx/html/blog
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if has_updates; then
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git pull &> /dev/null
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rm -f index.html
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rm -f rss.xml
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add_header
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ls -ltu src/*.md | tail -n+1 | while read f; do create_entry $f; done
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add_footer
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# Human-readable output for the cron notification
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echo 'Updated blog to:'
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git log -1
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fi
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