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Jekyll tag cloud / tag pages plugin

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tag_cloud_tag.rb
Ruby
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module Jekyll
class TagCloudTag < Liquid::Tag
safe = true
def initialize(tag_name, text, tokens)
super
end
 
def render(context)
html = ""
tags = context.registers[:site].tags
avg = tags.inject(0.0) {|memo, tag| memo += tag[1].length} / tags.length
weights = Hash.new
tags.each {|tag| weights[tag[0]] = tag[1].length/avg}
tags.each do |tag, posts|
html << "<span style='font-size: #{sprintf("%d", weights[tag] * 100)}%'><a href='/tags/#{tag}/'>#{tag}</a></span>\n"
end
html
end
end
end
 
Liquid::Template.register_tag('tag_cloud', Jekyll::TagCloudTag)
tag_page.rb
Ruby
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module Jekyll
class TagPage
include Convertible
attr_accessor :site, :pager, :name, :ext
attr_accessor :basename, :dir, :data, :content, :output
 
def initialize(site, tag, posts)
@site = site
@tag = tag
self.ext = '.html'
self.basename = 'index'
self.content = <<-EOS
{% for post in page.posts %}
<h3>{{ post.date | date: "%A %d.%m." }} &mdash; <a href="{{ post.url }}">{{ post.title }}</a></h3>
 
<p>{{ post.content | truncatewords: 20 }}</p>
 
<p>
{% if post.categories != empty %}
In {{ post.categories | array_to_sentence_string }}.
{% endif %}
{% if post.tags != empty %}
Tagged {{ post.tags | array_to_sentence_string }}.
</p>
{% endif %}
{% endfor %}
EOS
self.data = {
'layout' => 'default',
'type' => 'tag',
'title' => "Posts tagged #{@tag}",
'posts' => posts
}
end
 
def render(layouts, site_payload)
payload = {
"page" => self.to_liquid,
"paginator" => pager.to_liquid
}.deep_merge(site_payload)
do_layout(payload, layouts)
end
 
def url
File.join("/tags", @tag, "index.html")
end
 
def to_liquid
self.data.deep_merge({
"url" => self.url,
"content" => self.content
})
end
 
def write(dest_prefix, dest_suffix = nil)
dest = dest_prefix
dest = File.join(dest, dest_suffix) if dest_suffix
path = File.join(dest, CGI.unescape(self.url))
FileUtils.mkdir_p(File.dirname(path))
File.open(path, 'w') do |f|
f.write(self.output)
end
end
 
def html?
true
end
end
end
tag_page_generator.rb
Ruby
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module Jekyll
class TagPageGenerator < Generator
safe true
 
def generate(site)
site.tags.each do |tag, posts|
site.pages << TagPage.new(site, tag, posts)
end
end
end
end

Can you post a tutorial?
I am new to Jekyll.thanks.

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