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#! /bin/bash
set -e
# Executable command for markdown
markdown_bin="markdown -f fencedcode,autolink,alphalist,autolink,footnote"
# Directory for input/output
input_dir=${input_dir:?ENV \"input_dir\" is not set}
output_dir=${output_dir:?ENV \"output_dir\" is not set}
assets_dir=${assets_dir:-`pwd`/assets}
template_dir=${template_dir:-`pwd`/templates}
# functions {{{
# add indent for each line except <pre>
indent() {
indent="$(printf "%${1}s")"
sed "s/^/${indent}/; /<pre>/!b; :pre; N; /<\/pre>/!b pre"
}
# use heredoc to generate html from .md file and templates
html() {
<<-END_OF_HTML sed '1d;$d'
<!DOCTYPE html>
<html lang="en">
${head}
<body>
${header}
<hr><br>
<main>
$(${markdown_bin} | indent 4)
</main>
<br><hr>
${footer}
</body>
</html>
END_OF_HTML
}
# list of latest posts in markdown format
latest_posts() {
(IFS=$'\n'; echo "${index_list[*]}") | sort -r | head -20 | while read date path title; do
echo "- <time datetime="$date">$date</time> [$title](/$path)"
done
}
# print frontmatter from markdown file with format: "<key> <value>"
get_frontmatter() {
sed -n '1 {/<!--/ !q; n}; /-->/q; s/"//g; s/://p'
}
# process frontmatter
add_index() {
unset title public index date draft
# define local variables for frontmatter
while read key value; do
local -r $key="$value"
done <<<"$(get_frontmatter)"
# don't process draft after function call
test "$draft" != "" && return 1
# skip making index in some cases
test "$public" = false && return 0
test "$index" = false && return 0
test "$type" = demo && return 0
test "$title" = "" && return 0
iso8601=$(date --iso --date "${date:-NULL}" 2>/dev/null)
test "$iso8601" = "" && return 0
# put frontmatter info into variable "index" if title and date are valid
index_list+=("$iso8601 $path $title")
}
# remove SGML comments but keep the top one as frontmatter
ignore_comment() {
sed '1 !{ /^<!--$/,/^-->$/ d }'
}
# Generate the feed file
make_rss() {
echo -n "Making RSS "
rssfile=$blog_feed.$RANDOM
while [[ -f $rssfile ]]; do rssfile=$blog_feed.$RANDOM; done
{
pubdate=$(LC_ALL=C date +"$date_format_full")
cat <<-EOF
<?xml version="1.0" encoding="UTF-8" ?>'
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/">'
<channel><title>Dummy Website</title><link>https://topo.tw/index.xml</link>"
<description>$global_description</description><language>en</language>"
<lastBuildDate>$pubdate</lastBuildDate>"
<pubDate>$pubdate</pubDate>"
<atom:link href="$global_url/$blog_feed" rel="self" type="application/rss+xml" />"
EOF
n=0
while IFS='' read -r i; do
is_boilerplate_file "$i" && continue
((n >= number_of_feed_articles)) && break # max 10 items
echo -n "." 1>&3
echo '<item><title>'
get_post_title "$i"
echo '</title><description><![CDATA['
get_html_file_content 'text' 'entry' $cut_do <"$i"
echo "]]></description><link>$global_url/${i#./}</link>"
echo "<guid>$global_url/$i</guid>"
echo "<dc:creator>$(get_post_author "$i")</dc:creator>"
echo "<pubDate>$(LC_ALL=C date -r "$i" +"$date_format_full")</pubDate></item>"
n=$(( n + 1 ))
done < <(ls -t ./*.html)
echo '</channel></rss>'
} 3>&1 >"$rssfile"
echo ""
mv "$rssfile" "$blog_feed"
chmod 644 "$blog_feed"
}
# }}}
# prepare directory for outputs {{{
mkdir -p $output_dir/
rm -rf $output_dir/**
ln -s $assets_dir/* $output_dir/
# }}}
# content of templates {{{
head="$(cat $template_dir/head.html)"
header="$(cat $template_dir/header.html | indent 2)"
footer="$(cat $template_dir/footer.html | indent 2)"
index_list=()
index_template="$(cat $template_dir/index.md)"
# }}}
# for each markdown file {{{
files="$(find "$input_dir" -type f -name '*md')"
total=$(wc -l <<<"$files")
declare -i counter
for file in $files; do
# set variables
path=$(<<<"$file" sed "s#^${input_dir}/##; s/\.md$//").html; mkdir -p $(dirname $output_dir/$path)
content="$(cat ${file} | ignore_comment)"
# use frontmatter to decide making html file or not
<<<"$content" add_index || continue
# log
echo -e "\033[1K\r$((counter+=1))/$total \t\t processing $path"
# make html file for draft
h1="$(<<<"$content" get_frontmatter | sed -n 's/^title *//p')"
echo "$content" \
| tee $output_dir/${file#${input_dir}/} \
| { [ -n "$h1" ] && echo "# $h1"; cat; } \
| html >$output_dir/$path
done
echo
# }}}
# make index.html {{{
{
echo "${index_template}"
echo -e '<br><br>\n\n'
latest_posts
} \
| tee $output_dir/index.md \
| html >$output_dir/index.html
echo -e index.html "\t" generated
# }}}
# make index.xml {{{
# }}}
|
