# Hugo Book Theme

[![Hugo](https://img.shields.io/badge/hugo-0.56-blue.svg)](https://gohugo.io)
[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)

### [Hugo](https://gohugo.io) documentation theme as simple as plain book

![Screenshot](https://github.com/alex-shpak/hugo-book/blob/master/images/screenshot.png)

- [Features](#features)
- [Requirements](#requirements)
- [Installation](#installation)
- [Menu](#menu)
- [Blog](#blog)
- [Configuration](#configuration)
- [Shortcodes](#shortcodes)
- [Contributing](#contributing)

## Features

- Clean simple design
- Light and Mobile-Friendly
- Multi-language support
- Customisable
- Designed to not interfere with other layouts
- Zero initial configuration
- Handy shortcodes

## Requirements

- Hugo 0.56 or higher
- Hugo extended version, read more [here](https://gohugo.io/news/0.48-relnotes/)

## Installation

Navigate to your hugo project root and run:

```
git submodule add https://github.com/alex-shpak/hugo-book themes/book
```

Then run hugo (or set `theme = "book"`/`theme: book` in configuration file)

```
hugo server --minify --theme book
```

### Creating site from scratch

Below is example how to create new site from scratch

```sh
hugo new site mydocs; cd mydocs
git init
git submodule add https://github.com/alex-shpak/hugo-book themes/book
cp -R themes/book/exampleSite/content .
```

```sh
hugo server --minify --theme book
```

## Menu

### File tree menu (default)

By default theme will render pages from `content/docs` section as menu in a tree structure.  
You can set `title` and `weight` in front matter of pages to adjust order and titles in menu.

### Leaf bundle menu

You can also use leaf bundle and content of it's `index.md` as menu.  
Given you have this file structure

```
├── content
│   ├── docs
│   │   ├── page-one.md
│   │   └── page-two.md
│   └── posts
│       ├── post-one.md
│       └── post-two.md
```

Create file `content/docs/menu/index.md` with content

```md
+++
headless = true
+++

- [Book Example]({{< relref "/docs/" >}})
  - [Page One]({{< relref "/docs/page-one" >}})
  - [Page Two]({{< relref "/docs/page-two" >}})
- [Blog]({{< relref "/posts" >}})
```

And Enable it by settings `BookMenuBundle: /menu` in Site configuration

- [Example menu](https://github.com/alex-shpak/hugo-book/blob/master/exampleSite/content/menu/index.md)
- [Example config file](https://github.com/alex-shpak/hugo-book/blob/master/exampleSite/config.yaml)
- [Leaf bundles](https://gohugo.io/content-management/page-bundles/)

## Blog

Simple blog supported for section `posts`.  
Blog is not primary use case so book theme so it has only minimal features

## Configuration

### Site Configuration

There are few configuration options you can add to your `config.toml` file.  
You can also see `yaml` example [here](https://github.com/alex-shpak/hugo-book/blob/master/exampleSite/config.yaml).

```toml
# (Optional) Set Google Analytics if you use it to track your website.
# Always put it on the top of the configuration file, otherwise it won't work
googleAnalytics = "UA-XXXXXXXXX-X"

# (Optional) Set this to true if you use capital letters in file names
disablePathToLower = true

# (Optional) Set this to true to enable 'Last Modified by' date and git author
#  information on 'doc' type pages.
enableGitInfo = true

# (Optional) Theme is intended for documentation use, therefore it doesn't render taxonomy.
# You can remove related files with config below
disableKinds = ['taxonomy', 'taxonomyTerm']
  
[params]
  # (Optional, default 6) Set how many table of contents levels to be showed on page.
  # Use false to hide ToC, note that 0 will default to 6 (https://gohugo.io/functions/default/)
  # You can also specify this parameter per page in front matter
  BookToC = 3
  
  # (Optional, default none) Set the path to a logo for the book. If the logo is
  # /static/logo.png then the path would be 'logo.png'
  BookLogo = 'logo.png'
  
  # (Optional, default none) Set leaf bundle to render as side menu
  # When not specified file structure and weights will be used
  BookMenuBundle = '/menu'
  
  # (Optional, default docs) Specify section of content to render as menu
  # You can also set value to "*" to render all sections to menu
  BookSection = 'docs'
  
  # Set source repository location.
  # Used for 'Last Modified' and 'Edit this page' links.
  BookRepo = 'https://github.com/alex-shpak/hugo-book'
  
  # Enable 'Edit this page' links for 'doc' page type.
  # Disabled by default. Uncomment to enable. Requires 'BookRepo' param.
  # Path must point to 'content' directory of repo.
  BookEditPath = 'edit/master/exampleSite/content'
  
  # (Optional, default January 2, 2006) Configure the date format used on the pages
  # - In git information
  # - In blog posts
  BookDateFormat = 'Jan 2, 2006'
  
  # (Optional, default true) Enables search function with flexsearch,
  # Index is built on fly, therefore it might slowdown your website.
  BookSearch = true
```

### Multi-Language Support
Theme supports Hugo's [multilingual mode](https://gohugo.io/content-management/multilingual/), just follow configuration guide there. You can also tweak search indexing configuration per language in `i18n` folder.

### Page Configuration

You can specify additional params per page in front matter

```toml
# Set type to 'docs' if you want to render page outside of configured section or if you render section other than 'docs'
type = 'docs'

# Set page weight to re-arrange items in file-tree menu (if BookMenuBundle not set)
weight = 10

# (Optional) Set to mark page as flat section in file-tree menu (if BookMenuBundle not set)
bookFlatSection = true

# (Optional, Experimental) Set to hide nested sections or pages at that level. Works only with file-tree menu mode
bookCollapseSection = true

# (Optional) Set true to hide page or section from side menu (if BookMenuBundle not set)
bookHidden = true

# (Optional) Set how many levels of ToC to show. use 'false' to hide ToC completely
bookToC = 3
```

### Partials

There are few empty partials you can override in `layouts/partials/`

| Partial                                         | Placement                              |
| ----------------------------------------------- | -------------------------------------- |
| `layouts/partials/docs/inject/head.html`        | Before closing `<head>` tag            |
| `layouts/partials/docs/inject/body.html`        | Before closing `<body>` tag            |
| `layouts/partials/docs/inject/footer.html`      | After page content                     |
| `layouts/partials/docs/inject/menu-before.html` | At the beginning of `<nav>` menu block |
| `layouts/partials/docs/inject/menu-after.html`  | At the end of `<nav>` menu block       |

### Extra Customisation

| File                     | Description                                                                           |
| ------------------------ | ------------------------------------------------------------------------------------- |
| `static/favicon.png`     | Override default favicon                                                              |
| `assets/_custom.scss`    | Customise or override scss styles                                                     |
| `assets/_variables.scss` | Override default SCSS variables                                                       |
| `assets/_fonts.scss`     | Replace default font with custom fonts (e.g. local files or remote like google fonts) |

### Hugo Internal Templates

There are few hugo tempaltes inserted in `<head>`

- [Google Analytics](https://gohugo.io/templates/internal/#google-analytics)
- [Open Graph](https://gohugo.io/templates/internal/#open-graph)

## Shortcodes

### Hint

Hint shortcode can be used as hint/alerts/notification block. There are 3 colors to choose: `info`, `warning` and `danger`.

```tpl
{{< hint [info|warning|danger] >}}
**Markdown content**  
Lorem markdownum insigne. Olympo signis Delphis! Retexi Nereius nova develat
stringit, frustra Saturnius uteroque inter! Oculis non ritibus Telethusa
{{< /hint >}}
```

### Buttons

Buttons are styled links to internal of external pages

```
{{< button relref="/" >}}Get Home{{< /button >}}
{{< button href="https://github.com/alex-shpak/hugo-book" >}}Contribute{{< /button >}}
```

### Tabs

Useful if you want to show alternative information per platform or setting.

```
{{< tabs "uniqueid" >}}
{{< tab "MacOS" >}} # MacOS Content {{< /tab >}}
{{< tab "Linux" >}} # Linux Content {{< /tab >}}
{{< tab "Windows" >}} # Windows Content {{< /tab >}}
{{< /tabs >}}
```

### Multi column text

Organize text in 2 or more columns to use space efficiently.

```html
{{< columns >}} <!-- begin columns block -->
# Left Content Lorem markdownum insigne...

<---> <!-- magic sparator, between columns -->

# Mid Content Lorem markdownum insigne...

<---> <!-- magic sparator, between columns -->

# Right Content Lorem markdownum insigne...
{{< /columns >}}
```

### Expand

Provides clickable panel that show extra hidden content.

```
{{< expand >}}
## Markdown content
{{< /expand >}}
```

### Mermaid Charts

Render various charts with [mermaidjs](https://mermaidjs.github.io/)

```
{{< mermaid >}}
sequenceDiagram
    Alice->>Bob: Hello Bob, how are you?
    alt is sick
        Bob->>Alice: Not so good :(
    else is well
        Bob->>Alice: Feeling fresh like a daisy
    end
    opt Extra response
        Bob->>Alice: Thanks for asking
    end
{{< /mermaid >}}
```

### KaTeX Syntax

Render math formulas with [KaTeX](https://katex.org/)

```
{{< katex >}}
x = \begin{cases}
   a &\text{if } b \\
   c &\text{if } d
\end{cases}
{{< /katex >}}
```

## Contributing

### [Extra credits to contributors](https://github.com/alex-shpak/hugo-book/graphs/contributors)

Contributions are welcome and I will review and consider pull requests.  
Primary goals are:

- Keep it simple
- Keep minimal (or zero) default configuration
- Avoid interference with user-defined layouts

Feel free to open issue if you missing some configuration or customisation option.