The ancestral script for this project: https://github.com/paulohrpinheiro/gerablog

gera_blog.rb

#!/usr/bin/env ruby

require 'redcarpet'
require 'rss'

def write_file(filename, content, description, meta)
  File.write(
    filename,
    %(<!--#include virtual="/parts/header_begin.html" -->\n\n) +
    "#{meta}\n" +
    %(<meta name="description" content="#{description}">\n) +
    %(<!--#include virtual="/parts/header_end.html" -->\n\n) +
    content +
    %(\n\n<!--#include virtual="/parts/footer.html" -->\n)
  )
end

main_rss = []

Dir['*'].each do |category|
  puts category

  rss_file = "#{category}/feed.rss"
  rss_content = ''
  text_list = %(<h2><a href="/texts/#{rss_file}"><img src="/images/icon-rss.png"></a> #{category.capitalize}</h2>\n\n)

  class CustomRender < Redcarpet::Render::HTML
    def initialize(lang)
      super(prettify: true, escape_html: true)
      @@lang = lang
    end

    def block_code(code, language)
      %(<pre><code class="language-#{@@lang}">\n#{html_escape(code)}\n</code></pre>)
    end

    def html_escape(string)
      string.gsub(/['&\"<>\/]/, {
        '&' => '&amp;',
        '<' => '&lt;',
        '>' => '&gt;',
        '"' => '&quot;',
        "'" => '&#x27;',
        "/" => '&#x2F;',
      })
    end

  end

  markdown = Redcarpet::Markdown.new(
    CustomRender.new(category)
  )

  rss = RSS::Maker.make("atom") do |maker|
    maker.channel.author = "Paulo Henrique Rodrigues Pinheiro"
    maker.channel.updated = Time.now.to_s
    maker.channel.about = "https://paulohrpinheiro.xyz/texts/#{rss_file}"
    maker.channel.title = category.capitalize

    Dir["#{category}/*.md"].sort.reverse.each do |arq|
      puts "\t#{arq}"
      newfile = arq.gsub(/md$/, 'html')

      md_content = File.read(arq)
      lines = md_content.split("\n")

      title = lines[0][2..-1]
      description = lines[2][3..-1]

      puts "\t#{title}\n"

      sharer = '<h5>Compartilhe:</h5>'

      ['twitter', 'facebook', 'linkedin', 'email', 'googleplus'].each do |social|
        sharer += %(\n<button class="sharer button" ) +
                  %(data-sharer="#{social}" ) +
                  %(data-title="#{title}" ) + %(data-url="https://paulohrpinheiro.xyz/texts/#{newfile}">) +
                  %(<img src="/images/icon-#{social}.png"></button>\n)
      end

      write_file(newfile, markdown.render(md_content) + sharer, description, '<link href="/assets/css/prism.css" rel="stylesheet" />')

      text_list += %(<a href="/texts/#{newfile}"><h3 class="textcal">#{title}</h3>\n<p class="textcal">#{description}</p></a>\n\n)

      maker.items.new_item do |item|
        item.link = "https://paulohrpinheiro.xyz/texts/#{newfile}"
        item.title = title
        item.updated = Date.parse(newfile.match('\A.*/(....-..-..)')[1]).rfc822
        puts newfile if item.updated==0;

        main_rss.push({link: item.link, title: item.title, date: item.updated})
      end
    end
  end

  File.write(rss_file, rss)
  write_file("#{category}/index.html", text_list, "Textos e artigos sobre #{category.capitalize}", '')
end

main_rss.sort_by! { |h| h[:date] }.reverse!

rss = RSS::Maker.make("atom") do |maker|
  maker.channel.author = "Paulo Henrique Rodrigues Pinheiro"
  maker.channel.updated = Time.now.to_s
  maker.channel.about = "https://paulohrpinheiro.xyz/feed.rss"
  maker.channel.title = "Blog do PauloHRPinheiro"

  main_rss.take(1).each do |entry|
    maker.items.new_item do |item|
      item.link = entry[:link]
      item.title = entry[:title]
      item.updated = entry[:date]
    end
  end
end

File.write('feed.rss', rss)