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generate.rb
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generate.rb
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require 'nokogiri'
require 'pathname'
require 'fileutils'
# First we get the list of all the book sections:
Dir.chdir("html/sre.google/%s/table-of-contents" % ENV['BOOK_NAME'])
chapter_links = Nokogiri::HTML(open("index.html"))
.css('#drop-down a')
.map {|l| l.attribute('href').value}
html = <<EOT
<!DOCTYPE html>
<html>
<head>
<title>#{ENV['BOOK_NAME_FULL']}</title>
<meta charset="utf-8">
</head>
<body>
EOT
chapter_links.each do |chapter_link|
chapter_file = File.basename File.dirname chapter_link
html += "<span class=\"hidden\" id=\"#{chapter_file}\"></span>"
doc = Nokogiri::HTML(open(chapter_link))
content = doc.css('.content')
# this title is with additional 'chapter X' in front
title = doc.at_css('h2.chapter-title').content
content.css('.cont').each do |e|
e.remove
end
# Ensure that all links are to the same file
content.css('a').each do |a|
link = a.attribute('href')
if link
matches = link.value.scan /^(\S*index.html)+(#[\w-]+)?/
# pp [link.value, matches] if link.value and link.value.include? 'lessons-learned'
if matches.length == 1 and matches[0].length == 2
# Self Links
if matches[0][0] =="index.html" and matches[0][1]
a['href'] = matches[0][1]
# If it points to start of a different chapter
else
chapter_slug = File.basename File.dirname matches[0][0]
a['href'] = "##{chapter_slug}"
end
end
end
end
chapter_header = content.at('.heading')
headers = (1..6).map {|x| "h#{x}"}
content.css(headers.join(',')).each do |e|
# If chapter heading
if e == chapter_header
e.name = 'h1'
else
# Reduce everything by 1
i = headers.index e.name
new_name = headers[i+1] ? headers[i+1] : 'h6'
e.name = new_name
end
end
content.css('img').each do |img|
img_file = img.attribute('src')
if img_file
chapter_directory = File.dirname chapter_link
absolute_image_path = Pathname.new File.absolute_path img_file, chapter_directory
cwd = Pathname.new Dir.pwd
img['src'] = absolute_image_path.relative_path_from cwd
end
end
if content.children.css('section > h1').length > 0
# remove additional parent section tag
content = content.children.at_css('section')
elsif content.children.css('div > h1').length > 0
# remove additional parent div tag
content = content.children.at_css('div')
end
# replace h1 title
content.at_css('h1').inner_html = title
html += content.inner_html
end
html+="</body></html>"
File.open("complete.html", 'w') { |file| file.write(html) }
puts "[html] Generated HTML file"