By Arne Eilermann <arne@kleinerdrei.net> and Jens Wille <jens.wille@uni-koeln.de>
jekyll-tagging is a Jekyll plugin, to add a tag cloud and per tag pages plus feeds to your Jekyll generated Website.
This plugin does not reinvent Jekyll’s tagging feature. It just makes it easy to use. <jekyllrb.com/docs/frontmatter/>
Add space-delimited lowercase tags to FrontMatter, e.g.
--- author: Willow Rosenberg tags: feminism anti-capitalism witchcraft ---
Install it:
gem install jekyll-tagging
Add this line to your Jekyll project’s Gemfile:
gem 'jekyll-tagging'
Add the following to your _plugins/ext.rb file:
require 'jekyll/tagging'
And in your _config.yml you have to define your layout used to generate tag pages like:
tag_page_layout: tag_page tag_page_dir: tag
This will look for _layouts/tag_page.html, and use it to generate tag pages into the _site/tag directory.
Now you have a new filter called tag_cloud which you can use with the site object as argument in your layout to get a cloud of all your site’s tags. The tags are linked to their related tag page. Furthermore, you have a tags filter which you can feed with a post or a page object to get a link list of all its tags.
You can optionally define a per tag Atom/RSS feed. In your _config.yml define the following:
tag_feed_layout: tag_feed tag_feed_dir: tag
(tag_page_dir and tag_feed_dir can have the same value.)
If your Jekyll permalink configuration is set to something other than :pretty, and you still want to have pretty tag links define the following in your _config.yml:
tag_permalink_style: pretty
Sometimes you don’t want tag pages generated for certain pages. That’s ok! Just add ignored_tags: [tags,to,ignore] to your _config.yml
You can attach extra data to generated tag pages by specifying tag_page_data in _config.yml (this also works for tag_feed_data). For example, you might want to exclude tag pages from being picked up by ‘jekyll-sitemap`:
tag_page_data: sitemap: false
(Save this to _layouts/tag_page.html if using the _config.yml snippet above.)
---
layout: default
---
<h2>{{ page.tag }}</h2>
<ul>
{% for post in page.posts %}
<li><a href="{{ post.url }}">{{ post.title }}</a> ({{ post.date | date_to_string }} | Tags: {{ post | tags }})</li>
{% endfor %}
</ul>
<div id="tag-cloud">
{{ site | tag_cloud }}
</div>
(Save this to _layouts/tag_feed.xml if using the _config.yml snippet above.)
---
layout: nil
---
<?xml version="1.0" encoding="utf-8"?>
<feed xmlns="http://www.w3.org/2005/Atom">
<title>Your Title - {{ page.tag }}</title>
<link href="http://example.com{{ page.url }}" rel="self"/>
<link href="http://example.com/tag/{{ page.tag }}.html"/>
<updated>{{ site.time | date_to_xmlschema }}</updated>
<id>http://example.com/tag/{{ page.tag }}.html</id>
<author>
<name>Author Here</name>
</author>
{% for post in page.posts %}
<entry>
<title>{{ post.title }}</title>
<link href="http://example.com{{ post.url }}"/>
<updated>{{ post.date | date_to_xmlschema }}</updated>
<id>http://example.com{{ post.id }}</id>
<content type="html">{{ post.content | xml_escape }}</content>
</entry>
{% endfor %}
</feed>
To inform jekyll-tagging` of your tag hierarchy, please add a config parameter as follows:
tag_hierarchy_file: "tag_hierarchy.yml"
where "tag_hierarchy.yml" is a YAML file of the form parent-tag: [“child-tag”,“other-child-tag”].
Sample tag hierarchy file:
scala: [ "akka", "sbt", "play-framework","slick","scalacheck","scalatest","spark","sparksql"] python: ["pandas","scikit-learn"] play-framework: ["play","play 2","play2","play framework"] php: ["php 5.4","yii","phpmyadmin","phpunit"]
This will cause tag pages and tag clouds to take tag hierarchy information into account.
- Documentation
- Source code
- RubyGem
Copyright © 2010-2012 University of Cologne, Albertus-Magnus-Platz, 50923 Cologne, Germany
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