Lume 2.2.0 - Luísa Villalta

From now on, every new minor version of Lume will be dedicated to a relevant galician person. Today —17 May— is the Galician Literature Day and this year it was honored to the great poet Luísa Villalta. This Lume version is dedicated to her.

TL/DR

Cases requiring some manual changes after updating to Lume 2.2:

• If you have a _cache folder in your src directory, see this.
• If you importing LumeCMS from /lume/cms.ts, see this.

Esbuild improvements

The Esbuild plugin got the following improvements:

• JSR support: Now you can use jsr: specifiers in your code. They are handled using esm.sh (the same as npm: specifiers).

• Fixed npm: resolution. In previous versions, importing a bare specifier mapped to npm: like the following would fail:

  {
    "imports": {
      "bar": "npm:bar"
    }
  }
  

  import foo from "bar";
  

  This has been fixed and it works fine now.

• Using esbuild without bundler: Let's say you want to compile the following code with the bundle option to false:

  import foo from "./bar.ts";
  

  Esbuild converts bar.ts to bar.js, but it doesn't change the file extension in the import. The Lume plugin tries to fix this. More info.

CMS import changes

LumeCMS is a simple CMS to manage the content of the sites. To configure it, you have to create the _cms.ts file and import the CMS from the lume/cms.ts specifier:

import lumeCMS from "lume/cms.ts";

const cms = lumeCMS();

// Configuration here

export default cms;

The file lume/cms.ts, provided by Lume, exports everything you need from LumeCMS. But this has also the following issues:

• Lume and LumeCMS have different update paces. It's not easy to update LumeCMS if it's coupled to Lume.
• Providing everything in a single file makes Deno download all LumeCMS modules even those that you don't need. For example, GitHub storage has some NPM dependencies like Octokit that you may not need.

The best way to import LumeCMS is using the import map. This is something that the init script has been doing for a while. For example:

{
  "imports": {
    "lume/": "https://deno.land/x/lume@v2.2.0/",
    "lume/cms/": "https://cdn.jsdelivr.net/gh/lumeland/cms@0.4.1/"
  }
}

import lumeCMS from "lume/cms/mod.ts";

const cms = lumeCMS();

// Configuration here

export default cms;

This allows you to import only the specific modules of Lume that you need and update LumeCMS at your own pace.

I know this is a BREAKING CHANGE and sorry for that 🙏. But I believe the current situation wasn't easy to maintain.

New middleware shutdown

If you have a site on Deno Deploy that you want to shut down for reasons, this new middleware can be useful:

• All HTML requests will return the content of the /503.html page with the 503 status code.
• It also sends the Retry-After header with the default value of 24 hours (customizable).

import Server from "lume/core/server.ts";
import shutdown from "lume/middlewares/shutdown.ts";

const server = new Server();
server.use(shutdown());

server.start();

New theme option for Prism and Highlight.js

The plugins prism and code_highlight highlight the syntax of your code automatically using the libraries Prism and Highlight.js respectively. These libraries provide some nice premade themes that you can use but need to be loaded manually.

A new option theme was introduced to ease this step, so the themes are downloaded automatically. The option works the same for both plugins, this is an example with prism:

site.use(prism({
  theme: {
    name: "funky",
    path: "_includes/css/code_theme.css",
  },
}));

The CSS file for the Funky theme is downloaded automatically (using remoteFile under the hood) with the local path _includes/css/code_theme.css so you can import it in your CSS file with:

@import "css/code_theme.css";

site.use(prism({
  theme: {
    name: "funky",
    path: "/css/code_theme.css",
  },
}));

// Copy the file
site.copy("/css/code_theme.css");

Extra meta tags

The metas plugin allows to include custom meta tags. Useful to insert metas like twitter:label1, twitter:data1, etc.

In addition to the regular values, the metas object accepts additional values that are treated as custom meta tags. Example:

title: Lume is awesome
author: Dark Vader
metas:
  title: =title
  "twitter:label1": Reading time
  "twitter:data1": 1 minute
  "twitter:label2": Written by
  "twitter:data1": =author

This configuration generates the following code:

<meta name="title" content="Lume is awesome" />
<meta name="twitter:label1" content="Reading time" />
<meta name="twitter:data1" content="1 minute" />
<meta name="twitter:label2" content="Written by" />
<meta name="twitter:data2" content="Dark Vader" />

Feed plugin accepts images

The feed plugin has been extended with the new image key that allows one to place an image per item. For example:

site.use(feed({
  output: "/feed.xml",
  query: "type=articles",
  items: {
    title: "=title",
    description: "=excerpt",
    image: "=cover",
  },
}));

Liquid deprecation

Liquid plugin allows to use Liquidjs library as a template engine in Lume.

Liquidjs is a great library but it has a limitation incompatible with Lume: it's not possible to invoke functions. This is very unfortunate because it's not possible to use the search helper inside a liquid template to loop through the pages. For example, the following code doesn't work:

<ul>
  {% for item in search.pages('post') %}
  <li>{{item.title}}</li>
  {% endfor %}
</ul>

Lume has support for Nunjucks which is a good replacement because has a very similar syntax to Liquid and allows you to run functions, so I decided to deprecate the Liquid plugin and recommend Nunjucks instead. It will still be available in Lume 2 but probably be removed in Lume 3 (in the distant future).

_cache folder relative to root directory

The _cache folder is created by some plugins like transform_images in the source folder. For example, if your source folder is ./src/ the cache folder is ./src/_cache/.

As of Lume 2.2.0, this folder is created in the root directory (the same directory where the _config.ts file is). This makes its location more predictable, especially to add it to .gitignore.

After updating Lume, if you are using a subdirectory as the source folder, the _cache folder should be moved to the root.

Removed nesting plugin in PostCSS

The postcss plugin comes with the plugins postcss-nesting and autoprefixer enabled by default.

CSS nesting is now available in all browsers and this plugin is no longer needed, so it's no longer enabled by default in Lume.

If you still want to use it, you have to import it in the _config.ts file:

import lume from "lume/mod.ts";
import postcss from "lume/plugins/postcss.ts";
import nesting from "npm:postcss-nesting";

const site = lume();

site.use(postcss({
  plugins: [nesting()],
}));

export default site;

---

And there are many more changes that you can see in the CHANGELOG file.