Add the Jekyll docs

assets/stylesheets/application.css.scss

@@ -55,6 +55,7 @@
         'pages/github',
         'pages/go',
         'pages/haskell',
+        'pages/jekyll',
         'pages/jquery',
         'pages/julia',
         'pages/knockout',

assets/stylesheets/pages/_jekyll.scss

@@ -0,0 +1,35 @@
+._jekyll {
+  h2, h3 { @extend %block-heading; }
+
+  .note {
+    @extend %note;
+
+    h5 {
+      margin-top: 0.25em;
+    }
+
+    position: relative;
+    &::after {
+      content: attr(data-type);
+      opacity: 0.5;
+      text-transform: uppercase;
+      position: absolute;
+      top: 0.25em;
+      right: 0.5em;
+      font-size: 0.8em;
+      pointer-events: none;
+    }
+
+    // Other note types currently unstyled:
+    // plain
+    // tip
+    // feature
+    &.note-info { @extend %note-blue; }
+    &.note-warning { @extend %note-red; }
+    &.note-unreleased { @extend %note-orange; }
+  }
+
+  pre {
+    font-size: inherit;
+  }
+}

lib/docs/filters/jekyll/clean_html.rb

@@ -0,0 +1,55 @@
+module Docs
+  class Jekyll
+    class CleanHtmlFilter < Filter
+      def call
+        css('.improve, .section-nav').each(&:remove)
+
+        css('div.highlighter-rouge').each do |node|
+          pre = node.at_css('pre')
+
+          # copy over the highlighting metadata
+          match = /language-(\w+)/.match(node['class'])
+          # HACK: Prism shell highlighting highlights `|`,
+          # which makes the tree on this page look terrible
+          if match && !(slug == /structure/ && match[1] == 'sh')
+            lang = match[1]
+            if lang == 'sh'
+              lang = 'bash'
+            elsif lang == 'liquid'
+              lang = 'django' # Close enough.
+            end
+            pre['class'] = nil
+            pre['data-language'] = lang
+          end
+
+          # Remove the server-rendered syntax highlighting
+          code = pre.at_css('code')
+          code.content = code.text
+
+          # Remove the div.highlighter-rouge and div.highlight wrapping the <pre>
+          node.add_next_sibling pre
+          node.remove
+        end
+
+        css('code').each do |node|
+          node['class'] = ''
+        end
+
+        css('.note').each do |node|
+          node_type = /note ?(\w+)?/.match(node['class'])[1] || 'tip'
+
+          # <div class="note">...<br>...</div> -> <div class="note">...</div>
+          (node > 'br').each(&:remove)
+          # <div class="note">...<p>...<br><br>...</p>...</div> ->
+          # <div class="note">...<p>...<br>...</p>...</div>
+          node.css('br + br').each(&:remove)
+
+          node['class'] = "note note-#{node_type}"
+          node['data-type'] = node_type
+        end
+
+        doc
+      end
+    end
+  end
+end

lib/docs/filters/jekyll/entries.rb

@@ -0,0 +1,29 @@
+module Docs
+  class Jekyll
+    class EntriesFilter < Docs::EntriesFilter
+
+      def get_name
+        at_css('h1').content
+      end
+
+      def get_type
+        if /continuous-integration/.match(slug)
+          'Deployment'
+        else
+          nav_link = doc.document # document
+            .at_css('aside li.current') # item in navbar
+
+          if nav_link
+            nav_link
+              .parent # <ul> in navbar
+              .previous_element # header before <ul>
+              .content # category
+          else
+            'Miscellaneous'
+          end
+        end
+      end
+
+    end
+  end
+end

lib/docs/scrapers/jekyll.rb

@@ -0,0 +1,34 @@
+module Docs
+  class Jekyll < UrlScraper
+    self.type = 'jekyll'
+    self.release = '3.6.2'
+    self.base_url = 'https://jekyllrb.com/docs/'
+    self.root_path = 'home/'
+    self.links = {
+      home: 'https://jekyllrb.com/',
+      code: 'https://github.com/jekyll/jekyll'
+    }
+
+    html_filters.push 'jekyll/clean_html', 'jekyll/entries'
+
+    options[:trailing_slash] = true
+    options[:container] = 'article'
+    options[:skip] = [
+      '',
+      '/'
+    ]
+    options[:skip_patterns] = [
+      /conduct/,
+      /history/,
+      /maintaining/,
+      /contributing/
+    ]
+    options[:attribution] = <<-HTML
+      &copy; 2008&ndash;2017 Tom Preston-Werner and Jekyll contributors<br />
+      Licensed under
+        <a href="https://github.com/jekyll/jekyll/blob/master/LICENSE">
+          the MIT license
+        </a>
+    HTML
+  end
+end

public/icons/docs/jekyll/SOURCE

@@ -0,0 +1 @@
+https://avatars3.githubusercontent.com/u/3083652