reverting the silly and flakey manual tag directory

Author: gregology

_plugins/tag_page_generator.rb

@@ -0,0 +1,31 @@
+module Jekyll
+  class TagPage < Page
+    def initialize(site, tag)
+      @site = site
+      @base = site.source
+      @dir = "tag/#{Utils.slugify(tag)}"
+      @name = "index.html"
+
+      process(@name)
+      read_yaml(File.join(site.source, "_layouts"), "tag_index.html")
+
+      data["tag"] = tag
+      data["title"] = "Tag: #{tag}"
+      data["robots"] = "noindex, follow"
+    end
+  end
+
+  class TagPageGenerator < Generator
+    safe true
+    priority :low
+
+    def generate(site)
+      return unless site.layouts.key?("tag_index")
+
+      tags = site.posts.docs.flat_map { |post| post.data["tags"] || [] }.uniq
+      tags.each do |tag|
+        site.pages << TagPage.new(site, tag)
+      end
+    end
+  end
+end