A `web_address` variable
================================

.. objectives:: Objectives

   We are going to create another variable for the needs of our use case,
   a conditional disabled variable with type `web_address`.

.. prerequisites:: Prerequisites

    - We assume that Rougail's library is :ref:`installed <installation>` on your computer.

    - It is possible to retrieve the current state of the various Rougail files manipulated in this tutorial step
      by checking out the corresponding tag of the `rougail-tutorials` git repository.
      Each tag corresponds to a stage of progress in the tutorial.
      Of course, you can also decide to copy/paste or download the tutorial files contents while following the tutorial steps.

    If you want to follow this tutorial with the help of the corresponding :tutorial:`rougail-tutorials git repository <src/branch/v1.1>`,
    this workshop page corresponds to the tag :tutorial:`v1.1_100 <src/tag/v1.1_100/README.md>`
    in the repository.

    ::

       git clone https://forge.cloud.silique.fr/stove/rougail-tutorials.git
       git switch --detach v1.1_100

.. type-along:: A web_address variable

A conditional disabled variable with type web_address
-------------------------------------------------------------

First we need to add a variable as part of our use case with a type we haven't used yet, the `web_address` type.
It is related to the automatic proxy configuration :term:`situation <configuration>`. 
Let's put it in the new :file:`firefox/30-auto.yml` :term:`structure file`. 
Note that this variable has a :term:`disabled` property defined:

.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_110/firefox/30-auto.yml
   :language: yaml
   :caption: The :file:`firefox/30-auto.yml` structure definition file with the `auto` variable

.. 
    %YAML 1.2
    ---
    version: 1.1

    auto:
      description: Automatic proxy configuration URL
      type: web_address
      disabled:
        variable: _.proxy_mode
        when_not: Automatic proxy configuration URL
    ...

If the `proxy_mode` variable has the `"Automatic proxy configuration URL"` value, the `auto` variable is enabled.
It is :term:`disabled` otherwise.

Let's launch the Rougail CLI on this :term:`user data file <user data>`: 

.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_110/config/02/config.yml
   :language: yaml
   :caption: The :file:`config/02/config.yml` user data file

..
    ---
    proxy_mode: Automatic proxy configuration URL
    auto: https://auto.proxy.net/wpad.dat
    no_proxy: 192.168.1.0/24

we have this output:

.. raw:: html
   :url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_110/config/02/output_ro.html
   :class: output

..
    ╭────────────── Caption ───────────────╮
    │ Variable Modified value              │
    │          (⏳ Original default value) │
    ╰──────────────────────────────────────╯
    Variables:
    ┣━━ 📓 Configure Proxy Access to the Internet: Automatic proxy configuration URL ◀ loaded from the YAML file "config/03/config.yml" (⏳ No proxy)
    ┗━━ 📓 Automatic proxy configuration URL: https://auto.proxy.net/wpad.dat ◀ loaded from the YAML file "config/03/config.yml"

We can see that the `auto` variable has been activated here in this :term:`situation <configuration>`.

.. keypoints:: Key points

   In this section we have just created yet another variable, the `auto` variable, with the `web_address` type.
   We are now used to conditional deactivation of a variable.