jekyllpre.rb

#!/usr/bin/ruby
# encoding: utf-8
# Example custom processor for use with Marked <http://markedapp.com> and Jekyll _posts
# It's geared toward my personal set of plugins and tags, but you'll get the idea.
#   It turns
# {% img alignright /images/heythere.jpg 100 100 "Hey there" "hi" %}
#   into
# <img src="../images/heythere.jpg" alt="Hey there" class="alignright" title="hi" />
#
# replaces alignleft and alignright classes with appropriate style attribute
# ---
# Replaces {% gist XXXXX filename.rb %} with appropriate script tag
#
# Replace various other OctoPress, Jekyll and custom tags
#
# Processes final output with /usr/bin/kramdown (install kramdown as system gem: `sudo gem install kramdown`)
#
# Be sure to run *without* stripping YAML headers in Marked Behavior preferences.

Encoding.default_internal = Encoding::UTF_8
Encoding.default_external = Encoding::UTF_8

# full path to image folder
full_image_path = "/Users/jswang/Documents/jeswang-blog/source"

require "CGI"
require "rubygems"

content = STDIN.read

parts = content.split(/^---\s*$/)

# Read YAML headers as needed before cutting them out
post_title = parts[1].match(/^title:\s+(\!\s*)?["']?(.*?)["']?\s*$/i)[2].strip

# Remove YAML
# content.sub!(/^---.*?---\s*$/m,'')
content = parts[2]

# Fenced code
content.gsub!(/^```(\w+)?\s*\n(.*?)\n```/m) {
  %Q"<pre><code class=\"#{$1}\">#{CGI.escapeHTML($2)}</code></pre>"
}

content.gsub!(/\{%(\s+)?codeblock (lang:)?(\S+)?(\s+)?%\}\n?([\W\w]*?)\{%(\s+)?endcodeblock(\s+)?%\}/m) {
  %Q"<pre><code class=\"#{$3}\">#{CGI.escapeHTML($5)}</code></pre>"
}


# Process image Liquid tags
content.gsub!(/\{% img (.*?\s*)%\}/) {|img|
  if img =~ /\{% img\s+(\S+\s)?(https?:\/\/\S+|\/\S+)\s+(\d+\s+)?(\d+\s+)?(\S.*\s*)?%\}/i
    classes = $1.strip if $1
    src = $2
    width = $3
    height = $4
    title = $5

    if /(?:"|')([^"']+)?(?:"|')\s+(?:"|')([^"']+)?(?:"|')/ =~ title
      title  = $1
      alt    = $2
    else
      alt    = title.gsub!(/"/, '&#34;') if title
    end
    classes.gsub!(/"/, '') if classes
  end

  style = %Q{ style="float:right;margin:0 0 10px 10px"} if classes =~ /left/
  style = %Q{ style="float:left;margin:0 10px 10px 0"} if classes =~ /right/

  %Q{<img src="#{File.join(full_image_path,src)}" alt="#{alt}" class="#{classes}" title="#{title}"#{style} />}
}

content = "## #{post_title}\n\n#{content}"

File.open("/tmp/markdown", 'w:utf-8') { |file| file.write(content) }

puts %x{multimarkdown /tmp/markdown }