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Liquid Tags

All of the standard Liquid tags are supported. Bridgetown has a few built in tags to help you build your site. You can also create your own tags using plugins.

Includes

If you have page snippets that you use repeatedly across your site, an include is the perfect way to make this more maintainable.

Code snippet highlighting

Bridgetown has built in support for syntax highlighting of over 100 languages thanks to Rouge. To render a code block with syntax highlighting, surround your code as follows:

{% highlight ruby %}
def foo
  puts 'foo'
end
{% endhighlight %}

The argument to the highlight tag (ruby in the example above) is the language identifier. To find the appropriate identifier to use for the language you want to highlight, look for the “short name” on the Rouge wiki.

Bridgetown processes all Liquid filters in code blocks

If you are using a language that contains curly braces, you will likely need to place {% raw %} and {% endraw %} tags around your code. If needed, you can add render_with_liquid: false in your front matter to disable Liquid entirely for a particular document.

You can also use fenced code blocks in Markdown (starting and ending with three backticks ```) instead of using the highlight tag. However, the highlight tag includes additional features like line numbers (see below).

Line numbers

There is a second argument to highlight called linenos that is optional. Including the linenos argument will force the highlighted code to include line numbers. For instance, the following code block would include line numbers next to each line:

{% highlight ruby linenos %}
def foo
  puts 'foo'
end
{% endhighlight %}

Stylesheets for syntax highlighting

In order for the highlighting to show up, you’ll need to include a highlighting stylesheet. You can use CSS that’s compatible with Pygments—example gallery here or from its repository.

Copy the CSS file (native.css for example) into your styles directory and import the syntax highlighter styles into your index.scss:

@import "native.css";

To link to a post, a page, collection item, or file, the link tag will generate the correct permalink URL for the path you specify. For example, if you use the link tag to link to mypage.html, even if you change your permalink style to include the file extension or omit it, the URL formed by the link tag will always be valid.

You must include the file’s original extension when using the link tag. Here are some examples:

{% link _collection/name-of-document.md %}
{% link _posts/2016-07-26-name-of-post.md %}
{% link news/index.html %}
{% link /assets/files/doc.pdf %}

You can also use the link tag to create a link in Markdown as follows:

[Link to a document]({% link _collection/name-of-document.md %})
[Link to a post]({% link _posts/2016-07-26-name-of-post.md %})
[Link to a page]({% link news/index.html %})
[Link to a file]({% link /assets/files/doc.pdf %})

The path to the post, page, or collection is defined as the path relative to the root directory (where your config file is) to the file, not the path from your existing page to the other page.

For example, suppose you’re creating a link in page_a.md (stored in pages/folder1/folder2) to page_b.md (stored in pages/folder1). Your path in the link would not be ../page_b.html. Instead, it would be /pages/folder1/page_b.md.

If you’re unsure of the path, add {{ page.path }} to the page and it will display the path.

One major benefit of using the link or post_url tag is link validation. If the link doesn’t exist, Bridgetown won’t build your site. This is a good thing, as it will alert you to a broken link so you can fix it (rather than allowing you to build and deploy a site with broken links).

Note you cannot add filters to link tags. For example, you cannot append a string using Liquid filters, such as {% link mypage.html | append: "#section1" %}. To link to sections on a page, you will need to use regular HTML or Markdown linking techniques.

Linking to posts

If you want to include a link to a post on your site, the post_url tag will generate the correct permalink URL for the post you specify.

{% post_url 2010-07-21-name-of-post %}

If you organize your posts in subdirectories, you need to include subdirectory path to the post:

{% post_url /subdir/2010-07-21-name-of-post %}

There is no need to include the file extension when using the post_url tag.

You can also use this tag to create a link to a post in Markdown as follows:

[Name of Link]({% post_url 2010-07-21-name-of-post %})

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