Image galleries

Author: Dvogonen

_plugins/directory_tag.rb

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+# Title: Dynamic directories for Jekyll
+# Author: Tommy Sullivan http://superawesometommy.com, Robert Park http://exolucere.ca
+# Description: The directory tag lets you iterate over files at a particular path. If files conform to the standard Jekyll format, YYYY-MM-DD-file-title, then those attributes will be populated on the yielded file object. The `forloop` object maintains [its usual context](http://wiki.shopify.com/UsingLiquid#For_loops).
+#
+# Syntax:
+#
+#   {% directory path: path/from/source [reverse] [exclude] %}
+#     {{ file.url }}
+#     {{ file.name }}
+#     {{ file.date }}
+#     {{ file.slug }}
+#     {{ file.title }}
+#   {% enddirectory %}
+#
+# Options:
+#
+# - `reverse` - Defaults to 'false', ordering files the same way `ls` does: 0-9A-Za-z.
+# - `exclude` - Defaults to '.html$', a Regexp of files to skip.
+#
+# File Attributes:
+#
+# - `url` - The absolute path to the published file
+# - `name` - The basename
+# - `date` - The date extracted from the filename, otherwise the file's creation time
+# - `slug` - The basename with date and extension removed
+# - `title` - The titlecase'd slug
+#
+
+module Jekyll
+
+  class DirectoryTag < Liquid::Block
+    include Convertible
+
+    MATCHER = /^(.+\/)*(\d+-\d+-\d+)-(.*)(\.[^.]+)$/
+
+    attr_accessor :content, :data
+
+    def initialize(tag_name, markup, tokens)
+      attributes = {}
+
+      # Parse parameters
+      markup.scan(Liquid::TagAttributes) do |key, value|
+        attributes[key] = value
+      end
+
+      @path     = attributes['path']   || '.'
+      @exclude  = Regexp.new(attributes['exclude'] || '.html$', Regexp::EXTENDED | Regexp::IGNORECASE)
+      @rev      = attributes['reverse'].nil?
+
+      super
+    end
+
+    def render(context)
+      context.registers[:directory] ||= Hash.new(0)
+
+      source_dir = context.registers[:site].source
+      directory_files = File.join(source_dir, @path, "*")
+
+      files = Dir.glob(directory_files).reject{|f| f =~ @exclude }
+      files.sort! {|x,y| @rev ? x <=> y : y <=> x }
+
+      length = files.length
+      result = []
+
+      context.stack do
+        files.each_with_index do |filename, index|
+          basename = File.basename(filename)
+
+          filepath  = [@path, basename] - ['.']
+          path = filepath.join '/'
+          url  = '/' + filepath.join('/')
+
+          m, cats, date, slug, ext = *basename.match(MATCHER)
+
+          if m
+            date = Time.parse(date)
+            ext = ext
+            slug = slug
+          else
+            date = File.ctime(filename)
+            ext = basename[/\.[a-z]+$/, 0]
+            slug = basename.sub(ext, '')
+          end
+
+          context['file'] = {
+            'date' => date,
+            'name' => basename,
+            'slug' => slug,
+            'url' => url
+          }
+
+          context['forloop'] = {
+            'name' => 'directory',
+            'length' => length,
+            'index' => index + 1,
+            'index0' => index,
+            'rindex' => length - index,
+            'rindex0' => length - index - 1,
+            'first' => (index == 0),
+            'last' => (index == length - 1)
+          }
+
+          result << render_all(@nodelist, context)
+        end
+      end
+      result
+    end
+
+  end
+
+end
+
+Liquid::Template.register_tag('directory', Jekyll::DirectoryTag)
+