Thoughts and Notes on Software Development

Adding an Archive Page to Jekyll Now Blog

As I alluded to in my previous post, part of the limitations with creating a blog using the Jekyll Now repository, is that it didn't come with Archive and Tags support out of the box. Considering how easy it was to get a blog up and running with Jekyll Now, we shouldn't hold this against it or its creator/contributors. Instead, we should take this as an opportunity to learn more about Jekyll and start writing some code. So here is a quick guide on how you can add an Archive page to your Jekyll Now blog.

Step 1: Add a new archive.html file inside the _layouts folder in your repository.

The content of this file will be a mixture of HTML and Liquid. Liquid is a template language that you can use with Jekyll to help control the pages that are generated for your static site. Think of it as some programming code that gets processed when your static site is generated.

I actually struggled with this for awhile as I could not reconcile how a static site had, what looked like server side code in its pages. What I didn't realize then was that the Liquid code is only used to generate a static page/site. From a .NET developer's perspective, it is almost like Razor, except it is only used to generate a static site/page. It is not going to run as server side code.

The content of the archive.html file will be as follows:

layout: default

<article class="page">
  <h1>{{ page.title }}</h1>
  <div class="entry">
    {% assign previousYear = "" %}
    {% for post in site.posts %}
      {% capture currentYear %}
        {{ | date: "%Y" }}
      {% endcapture %}
      {% if currentYear != previousYear %}
        {% assign previousYear = currentYear %}
        <h3>{{ currentYear }}</h3>
      {% endif %}
      {{ | date: '%B %d, %Y' }} - <a style="font-weight: bold" href="{{ post.url }}">{{ post.title }}</a>
      <br />
    {% endfor %}    

All I'm trying to do here is get all the blog posts on this site and list them down by year. *Note that I am relying on the fact that the list of blog posts returned by the Jekyll Site Variable site.posts remains in reverse chronological order. For now, that seems to be the case and I don't have to add Liquid code to correctly sort the entries.*

If you're wondering what the line of code ”| date: '%B %d, %Y'” does, that is what is called a Liquid filter and that simply formats the date value to a format I specify. This is similar to calling the ToString() method on a DateTime object in C# and passing in a custom datetime format string.

The default.html file is also found in the _layouts folder in your repository. The link we want to add is this:

<a href="{{ site.baseurl }}/archive">Archive</a>

To find where to insert that line, just find the block of code in the default.html file, where it has the links to the About and Blog page. The code below is an example of what you are looking for.

	<a href="{{ site.baseurl }}/about">About</a>
	<a href="{{ site.baseurl }}/">Blog</a>
	<a href="{{ site.baseurl }}/archive">Archive</a>
	<a href="{{ site.baseurl }}/tags">Tags</a>

As you can see in the code above, I have added the link to the Archive page after the link to the Blog. This is also the code to modify if you wanted to change the order that the links show up on your website.

Step 3: At the root of your repository, add an file.

The content of the file will be as follows:

layout: archive
title: Archive
permalink: /archive/

Adding a .md (Markdown file) at the root of your repository will force Jekyll to generate a html page for that .md file. This is also how Jekyll decides to create the About page, because there is an file in the root of the repository.

Some notes on the content of the file:

There you have it, that wasn't too hard I think. For reference, you can view the source code for this website on Github to see how I implemented it.

#Jekyll #Liquid #Blog

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