generate pages for tags

_config.yml

@@ -26,6 +26,7 @@ pages_list:
     Resources: 'resources'
     Blog: 'blog'
 
-exclude: [vendor, "Gemfile", "Gemfile.lock"]
+exclude: [vendor, "Gemfile", "Gemfile.lock", "README.md", "LICENSE"]
 paginate: 5
 paginate_path: "/blog/page:num/"
+future: true

_layouts/tag.html

+---
+title: Tag
+pagestyle: tag
+layout: default
+---
+
+{% assign tag = site.data.tags[page.tag] %}
+<section class="tag-title">
+	<header>
+		<h1>{{ tag.name }}</h1>
+	</header>
+
+	<hr>
+	{{ tag.desc }}
+</section>
+
+{% for post in site.posts %}
+  {% if post.tags contains page.tag %}
+    <section class="post">
+      <header class="post-title">
+        <h1>
+          <a href="{{site.base-url}}{{ post.url }}#main">{{ post.title }}</a>
+          <time datetime="{{ post.date | date_to_xmlschema }}" class="post-date">
+            {{ post.date | date: "%B %e, %Y" }}
+          </time>
+          {% if post.tags.size > 0 %}
+          </h1>
+          <ol class="tags-list">
+            {% for post_tag in post.tags %}
+              {% assign tag = site.data.tags[post_tag] %}
+              {% if tag %}
+                <li><a class="tag" href="/blog/tag/{{ post_tag }}/">{{ tag.name }}</a></li>
+              {% endif %}
+            {% endfor %}
+          </ol>
+        {% endif %}
+      </header>
+
+      <hr>
+      {{ post.excerpt }}
+    </section>
+  {% endif %}
+{% endfor %}

_plugins/tag_gen.rb

+# Thanks to http://charliepark.org/tags-in-jekyll/
+
+module Jekyll
+  class TagIndex < Page
+    def initialize(site, base, dir, tag)
+      @site = site
+      @base = base
+      @dir = dir
+      @name = 'index.html'
+      self.process(@name)
+      self.read_yaml(File.join(base, '_layouts'), 'tag.html')
+      self.data['tag'] = tag
+      tag_title_prefix = site.config['tag_title_prefix'] || 'Posts Tagged &ldquo;'
+      tag_title_suffix = site.config['tag_title_suffix'] || '&rdquo;'
+      self.data['title'] = "#{tag_title_prefix}#{tag}#{tag_title_suffix}"
+    end
+  end
+  class TagGenerator < Generator
+    safe true
+    def generate(site)
+      if site.layouts.key? 'tag'
+        dir = site.config['tag_dir'] || 'blog/tag'
+        site.data['tags'].each do |tag, val|
+          write_tag_index(site, File.join(dir, tag), tag)
+        end
+      end
+    end
+    def write_tag_index(site, dir, tag)
+      index = TagIndex.new(site, site.source, dir, tag)
+      index.render(site.layouts, site.site_payload)
+      index.write(site.dest)
+      site.pages << index
+    end
+  end
+end

styles/tag.css

+@import 'posts.css';
+
+section.post {
+  background-color: #8598a2;
+  color: white;
+}
+
+section.post>header>h1>a:link, section.post>header>h1>a:visited {
+  color: honeydew;
+}