terraform/website/source/layouts/intro.erb

<% wrap_layout :inner do %>
	<% content_for :sidebar do %>
		<div class="docs-sidebar hidden-print affix-top" role="complementary">
			<ul class="nav docs-sidenav">
				<li<%= sidebar_current("what") %>>
				<a href="/intro/index.html">What is Terraform?</a>
                </li>

				<li<%= sidebar_current("use-cases") %>>
				<a href="/intro/index.html">Use Cases</a>
				</li>

				<li<%= sidebar_current("vs-other") %>>
				<a href="/intro/vs/index.html">Terraform vs. Other Software</a>
				<ul class="nav">
					<li<%= sidebar_current("vs-other-chef") %>>
					<a href="/intro/vs/chef-puppet.html">Chef, Puppet, etc.</a>
					</li>

					<li<%= sidebar_current("vs-other-custom") %>>
					<a href="/intro/vs/custom.html">Custom Solutions</a>
					</li>
				</ul>
				</li>

				<li<%= sidebar_current("gettingstarted") %>>
				<a href="/intro/getting-started/install.html">Getting Started</a>
				<ul class="nav">
					<li<%= sidebar_current("gettingstarted-install") %>>
					<a href="/intro/getting-started/install.html">Install Terraform</a>
					</li>

					<li<%= sidebar_current("gettingstarted-build") %>>
					<a href="/intro/getting-started/build.html">Build Infrastructure</a>
					</li>

					<li<%= sidebar_current("gettingstarted-change") %>>
					<a href="/intro/getting-started/change.html">Change Infrastructure</a>
					</li>

					<li<%= sidebar_current("gettingstarted-destroy") %>>
					<a href="/intro/getting-started/destroy.html">Destroy Infrastructure</a>
					</li>

					<li<%= sidebar_current("gettingstarted-deps") %>>
					<a href="/intro/getting-started/dependencies.html">Resource Dependencies</a>
					</li>

					<li<%= sidebar_current("gettingstarted-variables") %>>
					<a href="/intro/getting-started/variables.html">Input Variables</a>
					</li>

					<li<%= sidebar_current("gettingstarted-outputs") %>>
					<a href="/intro/getting-started/outputs.html">Output Variables</a>
					</li>

					<li<%= sidebar_current("gettingstarted-provision") %>>
					<a href="/intro/getting-started/provision.html">Provision</a>
					</li>

					<li<%= sidebar_current("gettingstarted-nextsteps") %>>
					<a href="/intro/getting-started/next-steps.html">Next Steps</a>
					</li>
				</ul>
				</li>
			</ul>
		</div>
	<% end %>

	<%= yield %>
<% end %>