Build the book's site HTML locally

This section covers how to build the HTML for your book locally, instead of using GitHub Pages. This allows you to host the book's HTML anywhere you like.

In order to locally build your book's HTML with Jekyll, you'll take one of two approaches:

1. Install a copy of the Ruby language (which is a free open-source language, but can be a pain to install).
2. Use a container software (Docker or Singularity) along with a Docker image that we've prepared for you from this Dockerfile.

We recommend installing Ruby with one of the supplied methods first, and if this fails, try installing with a container tool such as Docker.

If you wish to use GitHub's Jekyll builder then you can skip this section, because GitHub will automatically build your book's HTML with its own version of Jekyll. In this case, skip to the GitHub Pages publishing guide.

## Building your book with Ruby

The most straightforward way to build your book's HTML is to install Ruby and Jekyll.

In this case, you'll need Ruby, an open-source programming language, to build your book's HTML. You won't need to know how to program in Ruby, we'll just use some tools that utilize Ruby's libraries.

### Installing Ruby

There are a few different methods for installing Ruby, and their ease will depend on the operating system that you're using (in general, *nix platforms are more straightforward to use for installing Ruby).

In the following sections we'll cover a few ways to install Ruby, they are roughly ordered from most-straightforward to most-difficult. Once you've finished those steps, head to install ruby plugins and follow the directions.

#### Using the conda-forge recipe rb-github-pages

The easiest way to install Ruby on *nix systems is to use the conda package manager. On some systems the following should work:

conda install -c conda-forge rb-github-pages


This will install pre-compiled binaries for the Ruby package GitHub pages, Jekyll, and all of their dependencies. If this works for you, you can skip straight to the section using make install.

#### Using the official Jekyll instructions

The Jekyll Documentation provides their own set of instructions for how to install Ruby locally on your system. These are a bit more involved, but in general should work for many operating systems. Here are a few links to OS-specific instructions.

#### Using conda-forge to install Ruby from scratch

If you are on a platform for which the rb-github-pages package isn't available, you can also try install Ruby and a C++ compiler manually using conda, as follows:

conda install -c conda-forge ruby


Once you have Ruby installed, the conda-built clang compiler for your system needs to be installed. Details depend on your OS and are shown below.

##### Install clang compilers
###### On OSX

Two steps are needed on OSX. First, install the conda's clang compiler:

conda install -c conda-forge clangxx_osx-64


If you are running OSX 10.14 (Mojave) you also need to install system libraries in the default *nix locations by running

open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg

###### On Linux

Install conda's clang compiler:

conda install -c conda-forge gxx_linux-64


### Install Ruby plugins

Regardless of the approach used above, you'll next install the Ruby plugins for your specific book. To do so, change into your book's directory, and run

make install


which will install the following things:

• Bundler (a Ruby dependency management tool) if it is not already installed (e.g. by running conda install -c conda-forge rb-github-pages)
• A collection of Jekyll plugins for your book

Once you have Ruby installed, you can preview your book's site locally by running this command:

make serve

This should run Jekyll, building your site, and then open up a port on your computer with a live version of the book. It will generate your book's HTML in the _site/ folder. This collection of files makes a functioning static website.

If you'd like to only build your book's HTML without previewing the site, you can do this with the following command:

bundle exec jekyll serve


Once the collection of HTML files is in _site/, you can move on to publishing your book online.

## Building your book HTML with Containers

If the above steps do not work for you, then you can try building your book's HTML with containers.

Containers can provide an easier installation for many systems. If you are developing on a system where you have administrator privileges (i.e., you have root permissions), we recommend you use Docker.

We also provide instructions for using Singularity, an alternate containerization software for systems where you do not have administrator privileges. To learn more about using containers, please see the Docker for scientists guide.

### Docker

First, you'll need to make sure you have Docker installed. There are installation instructions for each operating system to guide you through this process.

Once Docker is available on your system, you can build the image locally with:

docker pull emdupre/jupyter-book


You can then access this image with the following command. Make sure to specify the full path to your Jupyter Book, rather than the relative path!

docker run --rm --security-opt label:disable  \
-v /full/path/to/your/book:/srv/jekyll \
-p 4000:4000 \
-it -u 1000:1000 \
emdupre/jupyter-book


If you navigate to http://0.0.0.0:4000/jupyter-book/ in your browser, you should see a preview copy of your book. If you instead see an error, please try to update your local book; see the Jupyter Book FAQ section for more details on how to do so.

You'll find the HTML for your book in the _site/ folder.

### Singularity

If you are on a system where you do not have administrator privileges (such as a shared computing cluster), you will not be able to use Docker. Instead, you can use Singularity. First, you'll need to check with your resource manager that Singularity is available on your system.

You can then create a Jupyter Book Singularity image using:

singularity build jupyter-book.simg docker://emdupre/jupyter-book


Next, you can access this image with the following command. Make sure to specify the full path to your Jupyter Book, rather than the relative path!

singularity run -B /full/path/to/your/book:/srv/jekyll \
--pwd /srv/jekyll \
jupyter-book.simg


And that's it! If you navigate to http://127.0.0.1:4000/jupyter-book/ in your browser, you should see a preview copy of your book.