Tables of Contents

Author: narendasan

_config.yml

@@ -1,75 +1,74 @@
-
 title: ACM@UIUC TIL
 url: "https://til.acm.illinois.edu"
 baseurl:
 google_analytics_key:
 show_full_navigation: true
 
 # Dependencies
-markdown:    kramdown
+markdown: kramdown
 kramdown:
-  input: GFM
-  hard_wrap: false
+    input: GFM
+    hard_wrap: false
 highlighter: rouge
 
 # Values for the jekyll-seo-tag gem (https://github.com/jekyll/jekyll-seo-tag)
 logo: /siteicon.png
 description: Things we learned.
 author:
-  name: ACM@UIUC
-  email: til@acm.illinois.edu
-  twitter: ACM-UIUC
+    name: ACM@UIUC
+    email: til@acm.illinois.edu
+    twitter: ACM-UIUC
 social:
   name: ACM@UIUC 
   links:
-    - https://github.com/acm-uiuc
-
+      - https://github.com/acm-uiuc
 
+excerpt_separator: ""
 permalink: pretty
 
 gems:
-  - jekyll-sitemap
-  - jekyll-seo-tag
-  - jekyll-feed
+    - jekyll-sitemap
+    - jekyll-seo-tag
+    - jekyll-feed
 
 exclude:
-  - Gemfile
-  - Gemfile.lock
-  - README.md
-  - LICENCE
-  - CONTRIBUTING.md
+    - Gemfile
+    - Gemfile.lock
+    - README.md
+    - LICENSE
+    - CONTRIBUTING.md
 
 collections:
-  til:
-    title: Today We Learned
-    permalink: /:path/
-    output: true
+    til:
+        title: Today I Learned
+        permalink: /:path/
+        output: true
 
 defaults:
-  -
-    scope:
-      path: ""
-    values:
-      layout: default
-  -
-    scope:
-      path: ""
-      type: "til"
-    values:
-      seo:
-        type: Article
-      _comments:
-        category: Group navigation links with this field
-        order: Used to sort links in the navigation
-  -
-    scope:
-      path: ""
-      type: "posts"
-    values:
-      _comments:
-        type: Marks the impact of this release
+    -
+        scope:
+            path: ""
+        values:
+            layout: default
+    -
+        scope:
+            path: ""
+            type: "til"
+        values:
+            seo:
+                type: Article
+            _comments:
+                category: Group navigation links with this field
+                order: Used to sort links in the navigation
+    -
+        scope:
+            path: ""
+            type: "posts"
+        values:
+            _comments:
+                type: Marks the impact of this release
 
 
 types:
-  - minor
-  - major
+    - minor
+    - major

_plugins/loop_directory.rb

@@ -0,0 +1,73 @@
+#usage:
+#{% loop_directory directory:images iterator:image filter:*.jpg sort:descending %}
+#   <img src="{{ image }}" />
+#{% endloop_directory %}
+
+module Jekyll
+    class LoopDirectoryTag < Liquid::Block
+
+        include Liquid::StandardFilters
+        Syntax = /(#{Liquid::QuotedFragment}+)?/
+
+        def initialize(tag_name, markup, tokens)
+            @attributes = {}
+
+            @attributes['directory'] = '';
+            @attributes['iterator'] = 'item';
+            @attributes['filter'] = 'item';
+            @attributes['sort'] = 'ascending';
+
+            # Parse parameters
+            if markup =~ Syntax
+                markup.scan(Liquid::TagAttributes) do |key, value|
+                    @attributes[key] = value
+                end
+            else
+                raise SyntaxError.new("Bad options given to 'loop_directory' plugin.")
+            end
+
+            #if @attributes['directory'].nil?
+            #   raise SyntaxError.new("You did not specify a directory for loop_directory.")
+            #end
+
+            super
+        end
+
+        def render(context)
+            context.registers[:loop_directory] ||= Hash.new(0)
+
+            images = Dir.glob(File.join(@attributes['directory'], @attributes['filter']))
+
+            if @attributes['sort'].casecmp( "descending" ) == 0
+                # Find files and sort them reverse-lexically. This means
+                # that files whose names begin with YYYYMMDD are sorted newest first.
+                images.sort! {|x,y| y <=> x }
+            else
+                # sort normally in ascending order
+                images.sort!
+            end
+
+            result = []
+
+            context.stack do
+
+
+                # remove filename extension
+                images.each { |pathname| 
+                  context[@attributes['iterator']] = File.basename(pathname, @attributes['filter'].sub('*', ''))
+                  result << render_all(@nodelist, context)
+                }  
+
+                # return pathname
+                # images.each_with_index do |item, index|
+                    # context[@attributes['iterator']] = item
+                    # result << render_all(@nodelist, context)
+                # end
+            end
+
+            result
+        end
+    end
+end
+
+Liquid::Template.register_tag('loop_directory', Jekyll::LoopDirectoryTag)