How to implement breadcrumbs on a Jekyll site with nested categories

.
└── docs
    ├── index.md
    └── science
        ├── index.md
        └── _posts
            └── 2016-06-08-my_title.md

	{% assign categories = include.path | split:"/" %}
	{% assign filename_without_extension = categories | last | split:"." | first %}
	{% if categories contains "_posts" or filename_without_extension == "index" %}
	{% comment %} posts are like /docs/python/_posts/2016-06-06-foobar.md {% endcomment %}
	{% comment %} OR pages are index.* i.e.: like /docs/python/index.md or index.html {% endcomment %}
	{% assign categories = categories | pop %}
	{% endif %}

	{% assign route="" %}

	<a href="{{ '/' | absolute_url }}">Home</a>
	{% for category in categories %}
	<span class="prompt">>></span>
	{% assign route = route | append: '/' | append: category %}
	{% if forloop.last %}
	{% if include.title %}{{include.title}}{% else %}{{ category }}{% endif %}
	{% else %}
	<a href="{{ route | absolute_url }}">{{ category }}</a> 
	{% endif %}
	{% endfor %}

..
{% include breadcrumbs.html path=page.path title=page.title %}
..