paragraph parse sample

parser.rb

require "redcarpet"
require "pathname"
require "cgi"

class MyRenderer < Redcarpet::Render::HTML
  def paragraph(text)
    if text =~ /^\s?\[.+\]\s?$/
      puts "parses:"
      lines = text.split("\n")
      lines.each do |line|
        puts "\t#{CGI.unescapeHTML(line)}"
      end
      ""
    else
      %(<p>#{text}</p>)
    end
  end
end

markdown = Redcarpet::Markdown.new(MyRenderer)
content = Pathname.new("./sample.md").read
markdown.render(content)

sample.md

# Paths for my project on GitHub

[/] <-> [/naoty] <-> [/naoty/graphdown]
[/] <-> [/naoty/graphdown]
[/] <-> [/search] -> [/naoty/graphdown]
[/] <-> [/notifications] -> [/naoty/graphdown]

This text should not be parsed.

[sample link](http://example.com)

# Sign in and Sign out on GitHub

[/] -[POST /logout]-> [/]
[/] -> [/login] -[POST /session]-> [/]

This text should not be parsed.