download-link-replacer

Sphinx extension: download link replacer

This sphinx extension allows you to replace the download links on the generated Jupyter book pages.

You can control the download option of the book in two ways:

• Disabling downloading using cell tags disable-download-page
• Add / replace download link with custom link using sphinx-download-link-replacer

1. Disabling download

If you add disable-download-page as a cell tag to a cell in a python notebook, the download button ({fa}download) will disappear from the topright corner. The cell tag can be added to any code cell in the notebook. This function might be handy if your page includes code which you don't want the students to see. Be aware that this also removes the option to download a PDF of the page.

2. Add/replace download link

The download link {fa}download --> {fa}file{guilabel}.ipynb can be replaced by using the following code in any markdown / notebook file:

```{custom_download_link} <link_target>
:text: "Custom text"
:replace_default: "True"
```

Replace <link_target> with the download location. It can either be a remote link (http, https, or ftp), or a local path (relative to the location of the file containing the directive). Local files must be located within or below the source folder of the book (i.e. the folder containing _config.yml).

The replace_default key is optional. When set to True, the default download link will be replaced with the custom one. When set to False, the default download link will be kept, and the custom one will be added below it. If the key is not set, the default behavior is to add the link to the list, without changing the default one.

The directive can appear multiple times in a single file.

A potential application of this functionality is when creating a page in which students have to do some coding. Downloading the page allows the student to save their work and work with their local environment. However, the original source file might include code (jupyterbook formatting, widgets, answers) which is not necessary for students. You can make a copy of the notebook file without these elements and replace the {fa}file{guilabel}.ipynb link to this custom notebook file. Furthermore, you can add any additional data as an additional {fa}file{guilabel}.zip file.

2.1. Installation

To install the Download-Link-Replacer follow these steps:

Step 1: Install the Package

Install the download-link-replacer package using pip:

pip install download-link-replacer

Step 2: Add to requirements.txt

Make sure that the package is included in your project's requirements.txt to track the dependency:

download-link-replacer

Step 3: Enable in _config.yml

In your _config.yml file, add the extension to the list of Sphinx extra extensions:

sphinx: 
    extra_extensions:
        - download-link-replacer