Check for existence of file using Jekyll

jekyllliquid

How can I use Jekyll to test for the existence of a file?

To clarify, I want to run an {% if %} statement to check if an image file exists with the same name as the page I am on.

On my page in the YAML front matter:

----
  reference-design: true
----

In my layout:

{% if page.reference-design %}
    {% assign filename = page.path | remove_first: '.html' %}
    <!-- How can I check if file actually exists? -->
    <img src="images/reference_designs/{{ filename }}.png">
{% endif %}

Best Answer

As of Jekyll 2, all site files are available via site.static_files. You can use this to check if a file exists. For example:

{% for static_file in site.static_files %}
    {% if static_file.path == '/favicon.ico' %}
        {% assign favicon = true %}
    {% endif %}
{% endfor %}

Related Solutions

Ruby – Jekyll not interpreting markdown

You will have to pass it through the markdownify filter:

<div class="grid_10 page">
  {% capture about_content %}
    {% include about_content.markdown %}
  {% endcapture %}
  {{ about_content | unindent | markdownify }}
</div>

To keep the Markdown code indented but remove the indentation before markdownification, I would write a dedicated plugin, called for example _plugins/unindent.rb:

module Jekyll
  module UnindentFilter
    def unindent input
      input.lstrip
    end
  end
end

Liquid::Template.register_filter Jekyll::UnindentFilter

Best Answer

Related Solutions

Ruby – Jekyll not interpreting markdown

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