Awesome

Wiki-style links in Jekyll

This repository proves that Jekyll allows Wiki-style links using just Liquid, as shown in this example:

This is a test with [[Testlink 1]] and a [[Testlink 2]] and a [Markdown link](/).

This is a test with Testlink 1 and a Testlink 2 and a Markdown link.

These Wiki-style links (credits to Ward Cunningham) can be created with Liquid using the following four steps. The first step is to split the content in such a way that you end up with content chunks that contain only one (double bracket) link. I call this the 'contentarray', or an 'item'. Each item gets split into the link part (itemparts[0]) and the rest (itemparts[1]). Then you need to match all pages against this link part. All matches are stored in the links string and the urls string, seperated by comma's. The next step is to split these strings into arrays. The third step is to loop over the links to replace each link in the original content and store it in a new variable, called 'replacedcontent'. This replacedcontent is not markdownified. Therefore, the final step is to show the replacedcontent and markdownify it.

The code is shown below:

{% assign contentarray = page.content | split:'[[' %}
{% for item in contentarray %}
    {% if forloop.index > 1 %}
        {% assign itemparts = item | split:']]' %}
        {% if forloop.index == 2 %}
            {% assign links = itemparts[0] %}
        {% else %}
            {% assign links = links | append: ',' | append: itemparts[0] %}
        {% endif %}
        {% assign result = site.pages | where: 'title',itemparts[0] %}
        {% if forloop.index == 2 %}
            {% assign urls = result[0].url %}
        {% else %}
            {% assign urls = urls | append: ',' | append: result[0].url %}
        {% endif %}
    {% endif %}
{% endfor %}

{% assign urlarray = urls | split:',' %}
{% assign linkarray = links | split:',' %}

{% assign replacedcontent = page.content %}
{% for item in linkarray %}
    {% assign linktext = '<a href="' | append: urlarray[forloop.index0] | append: '">' | append: item | append: '</a>' %}
    {% assign bracketlink = '[[' | append: item | append: ']]' %}
    {% assign replacedcontent = replacedcontent | replace: bracketlink,linktext %}
{% endfor %}

{{ replacedcontent | markdownify }}

Happy coding!