HugoPress

March 23, 2023 3 min read Modules Docs HugoPress

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Please check out the tutorial to start using Hugo modules.

Pluggable and UI less Hugo modules framework, which defines several functions and partials to load and render Hugo modules automatically. The main advantage is that once the theme support HugoPress, their users have the ability to install the modules without requesting new features to the theme.

Module
`github.com/hugomods/hugopress`

How it Works?

An HTML page is composed of a number of HTML markup blocks.

flowchart TD
  blocks---BS

  subgraph html
  HS[HTML begin] --> blocks[/Render blocks/]
  blocks --> HE[HTML end]
  end

  subgraph block
  BS[Start] --> attrs[/Render attributes/]
  attrs --> hooks[/Render hooks/]
  hooks --> BE[End]
  end

There are two key concepts: attributes and hooks.

Attributes

The attributes are used to append attributes to HTML tags.

Name	Description
`document`	The attributes will be appended into the `<html>` tag.
`body`	The attributes will be appended into the `<body>` tag.

The attributes partial should return key-value pairs.

1{{- return dict
2  "lang" .Page.Lang
3  "data-foo" "bar"
4  "data-hello" "world"
5}}

Attributes Parameters

Name	Type	Default	Description
`cacheable`	Boolean	`false`	Whether to cache the attributes.

Attributes Context

The context (aka the .) of attributes’ partial.

Name	Type	Description
`Page`	Page	Current page.

Hooks

The hooks are used to render HTML of the module in a specific place, such as <head>, <body>.

Name	Description
`head-begin`	At the beginning of the `<head>` tag.
`head-end`	Before the `<head>` end.
`body-begin`	At the beginning of the `<body>` tag.
`body-end`	Before the `<body>` end.

Hooks Parameters

Name	Type	Default	Description
`cacheable`	Boolean	`false`	Whether to cache the hooks.

Hooks Context

The context (aka the .) of hook partial.

Name	Type	Description
`Total`	Number	The number of modules in the current hook.
`Index`	Number	The index number of current module.
`HasPrev`	Boolean	Whether there are modules(s) before the current.
`HasNext`	Boolean	Whether there are modules(s) after the current.
`Page`	Page	Current page.

Guide

Create a HugoPress Theme

Modify your baseof.html as following for getting much more flexible, and then override the theme blocks.

 1{{/* layouts/_default/baseof.html */}}
 2<!DOCTYPE html>
 3<html {{ partial "hugopress/document-attributes" . | safeHTMLAttr -}}>
 4  <head>
 5    {{- partial "hugopress/head-begin.html" . }}
 6    {{/* Theme head block begin. */}}
 7    <title>{{- block "title" . -}}{{ .Title }}{{- end -}}</title>
 8    {{/* Theme head block end. */}}
 9    {{- partial "hugopress/head-end.html" . }}
10  </head>
11  <body {{ partial "hugopress/body-attributes" . | safeHTMLAttr -}}>
12    {{- partial "hugopress/body-begin.html" . }}
13    {{/* Theme body block begin. */}}
14    {{- block "main" . }}{{- end }}
15    {{/* Theme body block end. */}}
16    {{- partial "hugopress/body-end.html" . }}
17  </body>
18</html>

Create a HugoPress Modules

Let’s take the hello module as an example, which

Append data-hello="world" into the <html> tag.
Generate <meta name="hello" content="world"> inside the <head> tag.
Print Hello world. at the beginning of <body> tag.

Initialize Module

$ mkdir hugo-mod-hello
$ cd hugo-mod-hello
$ hugo mod init github.com/user/hugo-mod-hello

Modules Configuration

1[params.hugopress.modules.hello.attributes.document]
2[params.hugopress.modules.hello.hooks.head-end]
3[params.hugopress.modules.hello.hooks.body-begin]

We need to specify the attributes and hooks used by the module in config.toml.

Modules Architecture

$ tree layouts/partials/hugopress/modules/hello
├── attributes
│   └── document.html
└── hooks
    ├── body-begin.html
    └── head-end.html

The module files should be placed under the layouts/partials/hugopress/modules folder.

The source code can be found at hello module files.

Disable Module

1[params.hugopress.modules.hello]
2disable = true

Cacheable Attributes and Hooks

1[params.hugopress.modules.hello.attributes.document]
2cacheable = true
3
4[params.hugopress.modules.hello.hooks.body-begin]
5cacheable = true

Hooks Weight

Lower weight gets higher precedence.

1[params.hugopress.modules.hello.hooks.body-begin]
2weight = 1

Functions

Name	Description
`{{ partial "hugopress/functions/has-modules" $hookName }}`	Indicate if there are modules associate to the specified hook.
`{{ partial "hugopress/functions/exists" $moduleName }}`	Indicate whether the module exists.
`{{ partial "hugopress/functions/is-disabled" $moduleName }}`	Indicate whether the module was disabled, `false` if module doesn’t exist.

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