Alto is a minimal and modern Hugo template for static documentation sites, created by and optimized for CloudCannon. Browse through a live demo.

Designed initially for open-source software, Alto has many built-in features to aid both site users and documentation writers:

• Built-in static search with Pagefind;
• Twelve pre-configured Hugo shortcodes, including diff syntax highlighting, GitHub Gist embeds, and tree diagram formatter;
• Light/dark modes, with configurable color palettes;
• Easily configurable navigation and footer content;
• Flexible grouping options for docs pages;
• Automatic anchor links to subheadings;
• Optional announcement banner;
• Styled with Sass;
• Optimized for editing and publishing on CloudCannon.

CloudCannon uses Alto as the documentation site template for our own open-source tools. Take a look at these sample sites to see what's possible with static documentation on Alto:

• Pagefind
• Rosey
• Reseed

• This template expects alpinejs to be installed by the site.
• This template expects Pagefind to run after a site build.

Required information can be seen in the data/meta.yml

• project_name
  • Used for SEO tags, alt text, and similar places
• default_og_image
  • Self explanatory
• favicon
  • set the path to the favicon files

This site template is intended to be used as a documentation site with a landing page.

• content/_index.md should be used for the homepage.
• content/docs/_index.md represents the /docs/ page.
• All other pages in docs will live at their respective path.
  • i.e. content/docs/this/that.md represents /docs/this/that/

• title
  • Used as the page h1, and in page SEO tags
• nav_title
  • Used as a shorter title variant in the side navigation
• nav_section
  • Determines which heading this page should be placed under in the side navigation
  • A heading value being referenced here creates it, they are not stored elsewhere
• weight
  • Determines the order in which pages appear in the side navigation (lower is higher)

The site side-navigation only supports one level of nesting, and is configured via the nav_section front matter.

The top-level groups are in the order that they are first encountered after sorting all pages by weight. Lowering a page's weight may move the nav_section for that page up the hierarchy.

Pages can be placed outside of a group (alongside the homepage) by assigning them the nav_section of Root.

This template provides a diffcode shortcode that can provide source highlighting alongside diff highlighting. This shortcode should wrap a markdown code block that has a tagged language. For example, from the pagefind docs:

{{< diffcode >}}
```js
new PagefindUI({
    element: "#search",
+    mergeIndex: [{
+        bundlePath: "https://docs.example.com/_pagefind"
+    }]
})
```
{{< /diffcode >}}

The code block will be rendered with the leading + removed from each line, and those lines will then be highlighted green to represent a diff.

This template provides a tree shortcode that can help render an ASCII directory tree structure. The given char (default >) will be replaced with the appropriate box drawing character from the supported set. For example:

{{% tree %}}
package.json
_includes/
>> _layouts/
>  >> default.liquid
>  >> page.liquid
>> file.liquid
_site/
>> index.html
{{% /tree %}}

Will output:

package.json
_includes/
├─ _layouts/
│  ├─ default.liquid
│  └─ page.liquid
└─ file.liquid
_site/
└─ index.html

The tree shortcode delegates its output to diffcode automatically, so lines can be prepended with a + character to represent new files.

All headings on doc pages will have a clickable hash link inserted in the left gutter.

data/banner.yml can be provided to show a banner on the top of each page:

• enable_banner
  • Set to true to show the banner
• html
  • HTML (placed inside of a <p> tag) to show in the banner. Supports adding alpine directives.
• id
  • An ID used to store that the banner has been closed in localStorage. Make sure to change this when adding a new banner so that users who dismissed the last one will see it.
• show_until
  • A date timestamp, after which the banner should not be shown. This is useful for time-sensitive banners, such as a notice about a new release.