Middleman-NavTree

middleman-navsidebar is an extension for the Middleman static site generator that lets you generate navigation trees and menus based on your site structure.

Installation

Add this line to your application's Gemfile:

gem 'middleman-navsidebar'

And then execute:

$ bundle install

Activate the extension with default options by adding the following to middleman's config.rb:

activate :navsidebar

Alternatively, you can specify the options you want. Here's an example showing the explicit defaults:

activate :navsidebar do |options|
  options.data_file = 'tree.yml' # The data file where our navtree is stored.
  options.source_dir = 'source' # The `source` directory we want to represent in our nav tree.
  options.ignore_files = ['sitemap.xml', 'robots.txt'] # An array of files we want to ignore when building our tree.
  options.ignore_dir = ['assets'] # An array of directories we want to ignore when building our tree.
  options.home_title = 'Home' # The default link title of the home page (located at "/"), if otherwise not detected.
  options.promote_files = ['index.html.erb'] # Any files we might want to promote to the front of our navigation
  options.ext_whitelist = [] # If you add extensions (like '.md') to this array, it builds a whitelist of filetypes for inclusion in the navtree.
end

Usage Examples

When you activate the extension, a tree.yml file will be added to your data folder, mimicking your directory structure. Suppose the structure looks like this:

We can print the entire navigation tree to our template with the tree_to_html helper:

<ul><%= tree_to_html(data.tree) %></ul>

Here's the tree.yml file and the resulting rendered navtree (styled):

data.tree refers to the contents of /data/tree.yml (see http://middlemanapp.com/advanced/local-data/ for more information about data files).

You can just as easily print subtrees at any level:

<ul><%= tree_to_html(data.tree['chapter-1']) %></ul>

<ul><%= tree_to_html(data.tree['chapter-1']['exercises']) %></ul>

A second paramter allows you to limit the depth of your trees and subtrees:

<ul><%= tree_to_html(data.tree, 2) %></ul>

You can combine both techniques to print menus at any level, with a specific depth:

<ul><%= tree_to_html(data.tree['chapter-1'], 1) %></ul>

Another helper in the gem allows you to add next/previous links for paginating through the tree. For example:

<%= previous_link(data.tree) %> <%= next_link(data.tree) %>

You can likewise limit pagination to a specific subtree:

<%= previous_link(data.tree['chapter-2']) %><%= next_link(data.tree['chapter-2']) %>

Contributing

1. Fork the project
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to your github repository (git push origin my-new-feature)
5. Submit a Pull Request