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#!/bin/sh
domain="https://barf.btxx.org"
# Check the operating system
os_name=$(uname -s)
if [ "$os_name" = "OpenBSD" ]; then
alias sed=gsed
alias date=gdate
alias rsync=openrsync
elif [ "$os_name" = "Darwin" ]; then
alias sed=gsed
alias date=gdate
fi
set -eu
MARKDOWN=smu
IFS=' '
# Create tab separated file with filename, title, creation date, last update
index_tsv() {
for f in "$1"/*.md
do
title=$(sed -n '/^# /{s/# //p; q}' "$f")
printf '%s\t%s\t%s\t%s\n' "$f" "${title:="No Title"}"
done
}
index_html() {
# Print header
title=$(sed -n '/^# /{s/# //p; q}' index.md)
sed "s/{{TITLE}}/$title/" header.html
# Intro text
$MARKDOWN index.md
echo "<ul>"
# Posts
while read -r f title created; do
link=$(echo "$f" | sed -E 's|.*/(.*).md|\1/|')
created=$(echo $(head -3 "$f" | tail -1))
echo "<li>$created · <a href=\"$link\">$title</a></li>"
done < "$1" | sort -r
echo "</ul>"
# Print footer after post list
cat footer.html
}
atom_xml() {
uri=$(sed -rn '/atom.xml/ s/.*href="([^"]*)".*/\1/ p' header.html)
first_commit_date=$(git log --pretty='format:%ai' . | cut -d ' ' -f1 | tail -1)
cat <<EOF
<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>$(sed -n '/^# /{s/# //p; q}' index.md)</title>
<link href="$domain/atom.xml" rel="self" />
<updated>$(date +%FT%TZ)</updated>
<author>
<name>$(git config user.name)</name>
</author>
<id>$domain,$first_commit_date:default-atom-feed/</id>
EOF
while read -r f title created; do
content=$($MARKDOWN "$f" | sed 's/&/\&/g; s/</\</g; s/>/\>/g; s/"/\"/g; s/'"'"'/\'/g')
post_link=$(echo "$f" | sed -E 's|posts/(.*).md|\1|')
basic_date=$(echo $(head -3 "$f" | tail -1))
published_date=$(date -d $basic_date -u +%Y-%m-%dT10:%M:%SZ)
cat <<EOF
<entry>
<title>$title</title>
<content type="html">$content</content>
<link href="$domain/$post_link"/>
<id>$domain/$post_link</id>
<updated>$published_date</updated>
<published>$published_date</published>
</entry>
EOF
done < "$1"
echo '</feed>'
}
rss_xml() {
uri=$(sed -rn '/rss.xml/ s/.*href="([^"]*)".*/\1/ p' header.html)
first_commit_date=$(git log --pretty='format:%ai' . | cut -d ' ' -f1 | tail -1)
cat <<EOF
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0">
<channel>
<title>$(sed -n '/^# /{s/# //p; q}' index.md)</title>
<link>$domain/rss.xml</link>
<description>Feed description here</description>
<lastBuildDate>$(date -u +"%a, %d %b %Y %H:%M:%S %z")</lastBuildDate>
<pubDate>$(date -u +"%a, %d %b %Y %H:%M:%S %z")</pubDate>
<generator>Custom RSS Generator</generator>
<ttl>1800</ttl>
EOF
while read -r f title created; do
content=$($MARKDOWN "$f" | sed 's/&/\&/g; s/</\</g; s/>/\>/g; s/"/\"/g; s/'"'"'/\'/g')
post_link=$(echo "$f" | sed -E 's|posts/(.*).md|\1|')
basic_date=$(echo $(head -3 "$f" | tail -1))
published_date=$(date -d "$basic_date" -u +"%a, %d %b %Y %H:%M:%S %z")
cat <<EOF
<item>
<title>$title</title>
<description>$content</description>
<link>$domain/$post_link</link>
<guid isPermaLink="false">$domain/$post_link</guid>
<pubDate>$published_date</pubDate>
</item>
EOF
done < "$1"
echo '</channel>'
echo '</rss>'
}
write_page() {
filename=$1
directory=$(echo $(basename "$filename" .md))
$(mkdir -p build/$directory)
target=$(echo "$filename" | sed -r 's|\w+/(.*).md|build/\1/index.html|')
created=$(echo $(head -3 "$filename" | tail -1))
title=$2
$MARKDOWN "$filename" | \
cat header.html - |\
sed "s|{{TITLE}}|$title|" \
> "$target" && cat footer.html >> "$target"
}
rm -rf build && mkdir build
# Blog posts
index_tsv posts | sort -rt " " -k 3 > build/posts.tsv
index_html build/posts.tsv > build/index.html
atom_xml build/posts.tsv > build/atom.xml
rss_xml build/posts.tsv > build/rss.xml
while read -r f title created; do
write_page "$f" "$title" "$created"
done < build/posts.tsv
# Pages
index_tsv pages > build/pages.tsv
while read -r f title created; do
write_page "$f" "$title" "$created"
done < build/pages.tsv
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