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GitBook
=======
[](https://travis-ci.org/GitbookIO/gitbook)
GitBook is a command line tool (and Node.js library) for building beautiful programming books and exercises using GitHub/Git and Markdown. You can see an example: [Learn Javascript](http://gitbookio.github.io/javascript/).

## How to use it:
GitBook can be installed from **NPM** using:
```
$ npm install gitbook -g
```
You can serve a repository as a book using:
```
$ gitbook serve ./repository
```
Or simply build the static website using:
```
$ gitbook build ./repository --output=./outputFolder
```
Options for commands `build` and `serve` are:
```
-t, --title <name> Name of the book to generate, defaults to repo name
-i, --intro <intro> Description of the book to generate
-g, --github <repo_path> ID of github repo like : username/repo
-o, --output <directory> Path to output directory, defaults to ./_book
-f, --format <name> Change generation format, defaults to site, availables are: site, page, pdf, json
-i, --intro <intro> Description of the book to generate
-gh, --githubHost <url> The url of the github host (defaults to https://github.com/)
--theme <path> Path to theme directory
```
## Output Formats
GitBook can generate your book in the following formats:
* **Static Website**: This is the default format, it generates a complete interactive static website that can be for example hosted on GitHub Pages.
* **PDF**: A complete PDF book with exercise solutions at the end of the book. Generate to this format using: ```gitbook pdf ./myrepo```, you need to have [gitbook-pdf](https://github.com/GitbookIO/gitbook-pdf) installed.
* **Single Page**: The book will be stored in a single printable HTML page, this format is used for conversion to PDF or eBook. Generate to this format using: ```gitbook build ./myrepo -f page```.
* **JSON**: This format is used for debugging or extracting metadata from a book. Generate to this format using: ```gitbook build ./myrepo -f json```.
## Book Format
A book is a GitHub repository containing at least 2 files: `README.md` and `SUMMARY.md`.
#### README.md
As usual, it should contains an introduction for your book. It will be automatically added to the final summary.
#### SUMMARY.md
The `SUMMARY.md` defines your book's structure. It should contain a list of chapters, linking to their respective pages.
Example:
```
# Summary
This is the summary of my book.
* [section 1](section1/README.md)
* [example 1](section1/example1.md)
* [example 2](section1/example2.md)
* [section 2](section2/README.md)
* [example 1](section2/example1.md)
```
Files that are not included in the `SUMMARY.md` will not be processed by `gitbook`.
#### Exercises
A book can contain interactive exercises (currently only in Javascript but Python and Ruby are coming soon ;) ). An exercise is a code challenge provided to the reader, which is given a code editor to write a solution which is checked against the book author's validation code.
An exercise is defined by 4 simple parts:
* Exercise **Message**/Goals (in markdown/text)
* **Initial** code to show to the user, providing a starting point
* **Solution** code, being a correct solution to the exercise
* **Validation** code that tests the correctness of the user's input
Exercises need to start and finish with a separation bar (```---``` or ```***```). It should contain 3 code elements (**base**, **solution** and **validation**).
---
Define a variable `x` equal to 10.
```js
var x =
```
```js
var x = 10;
```
```js
assert(x == 10);
```
---
#### Multi-Languages
GitBook supports building books written in multiple languages. Each language should be a sub-directory following the normal GitBook format, and a file named `LANGS.md` should be present at the root of the repository with the following format:
```
* [English](en/)
* [French](fr/)
* [EspaƱol](es/)
```
You can see a complete example with the [Learn Git](https://github.com/GitbookIO/git) book.
#### Ignoring files & folders
GitBook will read the `.gitignore`, `.bookignore` and `.ignore` files to get a list of files and folders to skip. (The format inside those files, follows the same convention as `.gitignore`)
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