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render.rb
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render.rb
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#!/usr/bin/env ruby
class Converter
require 'pandoc-ruby'
require 'nokogiri'
@@footer = <<~HTML
<div id="footer">
Notes by <a href="http://www.davepagurek.com">Dave Pagurek</a>. Contribute <a href="https://github.com/davepagurek/SE-Notes">on GitHub</a>.
</div>
HTML
def walk(path)
Dir.foreach(path) do |child|
next if child.start_with?("..")
full_path = File.join(path, child)
if File.directory?(full_path)
write_index_page(full_path)
walk(full_path) unless child.start_with?(".")
elsif File.extname(full_path) == ".md"
write_page(full_path)
end
end
end
def write_page(path)
output_path = File.join(File.dirname(path), File.basename(path, ".md")) + ".html"
contents = File.read(path)
page = Nokogiri::HTML(
PandocRuby
.new(contents, :standalone, from: "markdown_github+tex_math_dollars")
.to_html(
:no_wrap,
:table_of_contents,
:mathjax,
tab_stop: 2,
css: "/SE-Notes/style.css"
)
)
process_page!(page, path)
File.write(output_path, page.to_html)
end
def process_page!(page, path)
body = page.css("body").first
head = page.css("head").first
return unless body
page.css("title").first&.unlink
title = page.css("h1").first
if title && head
head.add_child(Nokogiri::HTML.fragment(
<<~HTML
<title>#{title.text}</title>
HTML
))
end
toc = page.css("#TOC").first
if title && toc
# Remove heading 1 from ToC
list = page.css("#TOC > ul").first
sublist = page.css("#TOC > ul > li > ul").first
if list && sublist
list.unlink
toc.add_child(sublist)
end
# Move ToC to be after heading 1
toc.unlink
title.add_next_sibling(toc) if sublist
title.add_next_sibling(Nokogiri::HTML.fragment(
<<~HTML
<a href="index.html">Back to #{title_for_path(File.dirname(path))}</a>
HTML
))
end
body.add_child(Nokogiri::HTML.fragment(@@footer))
end
def write_index_page(path)
output_path = File.join(path, "index.html")
File.write(
output_path,
<<~HTML
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<meta name="generator" content="pandoc">
<title>#{title_for_path(path)} - Dave's SE Notes</title>
<style type="text/css">code{white-space: pre;}</style>
<link rel="stylesheet" href="/SE-Notes/style.css" type="text/css">
</head>
<body>
<h1>#{title_for_path(path)}</h1>
#{
unless path == "./."
"<p><a href='../index.html'>Back</a></p>"
else
""
end
}
<ul>
#{
Dir.entries(path).select{|f| File.directory?(f) && !f.start_with?(".") && !f.include?("vendor")}.map{|f|
"<li><a href='#{f}/index.html'>#{f}</a></li>"
}.join("\n")
}
#{
Dir.entries(path).select{|f| f.end_with?(".md")}.map{|f|
"<li><a href='#{File.join(File.dirname(f), File.basename(f, ".md")) + ".html"}'>#{f}</a></li>"
}.join("\n")
}
</ul>
#{@@footer}
</body>
</html>
HTML
)
end
def title_for_path(path)
return "All Subjects" if path == "./."
match = /^(\.\/)?(.+?)(\/.)?$/.match(path)
return match[2]
end
def convert
walk(".")
end
end
Converter.new.convert