update tutorial

docs/.gitignore

@@ -0,0 +1,2 @@
+.venv/
+build/

docs/Makefile

@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = .
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

docs/bribes.txt

@@ -1,2 +0,0 @@
-variable
- <https://en.wikipedia.org/wiki/Variable_(computer_science)>`_

docs/conf.py

@@ -14,6 +14,8 @@
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))
 
+# shows/hides the todos
+todo_include_todos = True
 
 # -- Project information -----------------------------------------------------
 
@@ -38,7 +40,7 @@ release = '1.0'
 # ones.
 
 extensions = [
-        'sphinx.ext.extlinks', 'sphinx_lesson',
+        'sphinx.ext.extlinks', 'sphinx_lesson', 'sphinx.ext.todo'
         #'myst_parser', 'sphinx.ext.extlinks'
 ]
 #

docs/index.rst

@@ -27,7 +27,7 @@ Explained differently, Rougail allows you to easily implement an integration of
    :caption: Getting started
 
    gettingstarted
-   tutorial
+   tutorial/index
 
 .. toctree::
    :titlesonly:

docs/readme.txt

@@ -0,0 +1,24 @@
+Building the doc locally
+============================
+
+install
+---------
+
+First, install a python virtual environment::
+
+    python -m venv .venv
+    source .venv/bin/activate
+
+Then install the sphinx libraries::
+
+    ./.venv/bin/pip3 install sphinx
+    ./.venv/bin/pip3 install sphinx_rtd_theme
+    ./.venv/bin/pip3 install sphinx_lesson
+
+The generatef html output is located in the `docs/build/html` subfolder,
+you can modify the target or the output type in the :file:`docs/Makefile`.
+
+scraps
+---------
+
+`variable <https://en.wikipedia.org/wiki/Variable_(computer_science)>`_

docs/tutorial/index.rst

@@ -0,0 +1,35 @@
+Tutorial with a real world sample
+=====================================
+
+Here's the demo. We're gonna start with a use case that comes from the real world.
+
+.. demo:: Demo: configuring (the setting of) your favorite web browser
+
+    This tutorial will show you an example of Rougail use based on the
+    "how to set a proxy" in the `Mozilla Firefox <https://www.mozilla.org/en-US/firefox/new/>`_ browser
+    use case.
+
+More precisely, this tutorial aims at reproducing this Mozilla Firefox settings page:
+
+.. note:: We are not coding a firefox plugin here.
+          We are just going to handle some of the firefox configuration settings
+          with Rougail.
+
+
+Presentation of the firefox configuration variables
+-----------------------------------------------------------
+
+Let's dive into the configuration validation use case,
+that is the values entered by the user that have to be validated.
+
+At first glance we have a choice between five variables:
+
+.. image:: images/firefox_01.png
+
+
+.. toctree::
+   :titlesonly:
+   :caption: The firefox tutorial steps
+
+   tutorial
+

docs/tutorial/tutorial.rst

@@ -0,0 +1,814 @@
+The Firefox proxy configuration
+-------------------------------------------
+
+The `proxy` family
+-------------------
+
+Let's create our first :term:`dictionary`.
+
+.. prerequisites:: Let's create a folder named `dict` and a dictionary file inside
+
+We will put our dictionary files in this folder.
+
+Then let's put our first dictionary file in this folder, named :file:`00-proxy.yml`
+
+.. code-block:: yaml
+   :caption: the :file:`00-proxy.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      description: Proxy configuration in order to have access to the internet
+      type: family
+
+We can see that we have defined a :term:`family` here, and this family is *empty*
+(that is, the family container contains no variable yet).
+
+.. admonition:: If a family is empty
+
+    We need to specify the :term:`family` type (line 5) here because if we don't,
+    the Rougail's type engine will infer it by default as a :term:`variable`.
+
+It's because we don't have set any :term:`variable` inside.
+
+
+.. note:: The variables will be created in several files for educational purposes.
+          Obviously all the variables can be put in the same file.
+
+
+The proxy's configuration type
+----------------------------------
+
+In the Firefox configuration, it is possible to define several configuration modes,
+from no proxy at all (`no proxy`) to a kind of automatic configuration mode from a file (`set up proxy configuration from a file`).
+
+We're gonna create a first variable in this family with "Proxy mode" as the description.
+Let's create a second :file:`dict/01-proxy_mode.yml` file.
+
+.. code-block:: yaml
+   :caption: the :file:`001-proxy_mode.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      proxy_mode:
+        description: Proxy mode
+        type: choice
+        choices:
+          - No proxy
+          - Auto-detect proxy settings for this network
+          - Use system proxy settings
+          - Manual proxy configuration
+          - Automatic proxy configuration URL
+        default: No proxy
+
+The `proxy_mode` variable requires a value (that is, `None` is not an option).
+It shall have a value, but what if the user *does not* specify any value?
+There is line 13, a possibility of setting a default value, wich is `No proxy` as the default.
+
+The `proxy_mode` setting is "choice" (`type: choice`) means that
+there is a list of available values that can be selected.
+We say that the `proxy_mode` variable is *constrained* (by choices).
+
+Line 8 to 12, we have the list of the possible (authorized) values:
+
+- No proxy
+- Auto-detect proxy settings for this network
+- Use system proxy settings
+- Manual proxy configuration
+- Automatic proxy configuration URL
+
+Now let's test our first two dictionaries:
+
+
+>>> from rougail import Rougail, RougailConfig
+>>> from pprint import pprint
+>>> RougailConfig['dictionaries_dir'] = ['dict']
+>>> rougail = Rougail()
+>>> config = rougail.get_config()
+>>> config.property.read_only()
+>>> pprint(config.value.get(), sort_dicts=False)
+{'rougail.proxy.proxy_mode': 'No proxy'}
+
+The manual mode
+------------------
+
+.. questions:: OK then. What happens when you select the "Manual proxy configuration"?
+
+A good configuration design is to place all the proxy's manual configuration in a :term:`family`.
+Let's create the :file:`dict/02-proxy_manual.yml` dictionary:
+
+.. code-block:: yaml
+   :caption: the the :file:`dict/02-proxy_manual.yml` file
+
+    ---
+    version: '1.1'
+    proxy:
+      manual:
+        description: Manual proxy configuration
+        type: family
+        disabled:
+          type: jinja
+          jinja: |
+            {% if rougail.proxy.proxy_mode != 'Manual proxy configuration' %}
+            the proxy mode is not manual
+            {% endif %}
+
+Well, if the user selects the "Manual proxy configuration" proxy mode, we want to see a new subfamily (that is, a new set of configuration variables) called `manual` to appear (which is disabled).
+
+.. glossary::
+
+   subfamily
+
+       A subfamily is just a family inside a family, a family that contains a family.
+
+.. questions:: What about this `Jinja` type?
+
+If the :term:`Jinja` template returns some text, then the family will be `disabled`. Otherwise it is accessible.
+Deactivating a family means that we will not be able to access it as well as the variables or families included in this family.
+
+.. note:: If the Jinja template does not return any text, the variable will be **enabled**.
+          Here we are using the Jinja condition statement.
+
+.. glossary::
+
+    Jinja
+
+        `Jinja <https://jinja.palletsprojects.com>`_ is a template engine.
+        we are using Jinja in a classical way, that is, Jinja allows us to handle different cases,
+        for example with the `if` statement.
+
+The HTTP proxy configuration
+------------------------------
+
+In this family let's add a *subfamily* named `http_proxy`, containing the address and port configuration variables.
+
+Let's create the :file:`dict/03-proxy_manual_http_proxy.yml` dictionary:
+
+.. code-block:: yaml
+   :caption: the the :file:`dict/02-proxy_manual.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      manual:
+        http_proxy:
+          description: HTTP Proxy
+          address:
+            description: HTTP address
+            type: domainname
+          port:
+            description: HTTP Port
+            type: port
+            default: '8080'
+
+Both variables `address` and `port` have particular types (respectively `domainname` line 9 and `port` line 12) to validate the values configured by the user.
+
+.. note:: No need to specify the type of the `http_proxy` as a family type, because here we have declared variables inside of it.
+
+Duplicating the HTTP configuration to HTTPS
+---------------------------------------------
+
+We then want to offer the user the possibility of providing the same proxy for the HTTPS requests. Let's create the :file:`dict/04-proxy_manual_http_use_for_https.yml` file:
+
+.. code-block:: yaml
+   :caption: the :file:`dict/04-proxy_manual_http_use_for_https.yml` file
+
+    version: '1.1'
+    proxy:
+      manual:
+        use_for_https:
+          description: Also use this proxy for HTTPS
+          type: boolean
+
+This variable is a `boolean` type, its default value is `True`.
+
+HTTPS proxy configuration detail
+-----------------------------------
+
+Let's add a new subfamily named `ssl_proxy`, containing the `address` and `port` variables.
+
+Let's create the :file:`dict/05-proxy_manual_ssl_proxy.yml` file:
+
+.. code-block:: yaml
+   :caption: the :file:`dict/04-proxy_manual_http_use_for_https.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      manual:
+        ssl_proxy:
+          description: HTTPS Proxy
+          hidden:
+            type: variable
+            variable: rougail.proxy.manual.use_for_https
+          address:
+            description: HTTPS address
+            type: domainname
+            default:
+              type: jinja
+              jinja: |
+                {% if rougail.proxy.manual.use_for_https %}
+                {{ rougail.proxy.manual.http_proxy.address }}
+                {% endif %}
+          port:
+            description: HTTPS Port
+            type: port
+            default:
+              type: jinja
+              jinja: |
+                {% if rougail.proxy.manual.use_for_https %}
+                {{ rougail.proxy.manual.http_proxy.port }}
+                {% endif %}
+
+
+Depending on the value of the `rougail.proxy.mandatory.use_for_https` variable, this family will appear or disappear (the `hidden` setting line 7). Unlike earlier, this time it is not necessary to use a Jinja function.
+
+Let's notice that the family is not disabled because the variables will need to remain accessible (yet in `read-only` mode).
+
+The address and port variables are copied from HTTP to HTTPS if `rougail.proxy.use_for_https` is set to `True`.
+
+Now let's test all of it:
+
+>>> from rougail import Rougail, RougailConfig
+>>> from pprint import pprint
+>>> RougailConfig['dictionaries_dir'] = ['dict']
+>>> rougail = Rougail()
+>>> config = rougail.get_config()
+>>> config.property.read_only()
+>>> pprint(config.value.get(), sort_dicts=False)
+{'rougail.proxy.proxy_mode': 'No proxy'}
+
+At this time the proxy is not configured yet, so we do not see any variables.
+Let's look at what happens if we try to access the `rougail.proxy.manual` variable if we are not in manual mode:
+
+.. code-block:: python
+
+    >>> pprint(config.option('rougail.proxy.manual').value.get(), sort_dicts=False)
+
+We have an error (with the message defined in the Jinja template):
+
+
+.. code-block:: shell
+
+    tiramisu.error.PropertiesOptionError: cannot access to
+    optiondescription "Manual proxy configuration" because
+    has property "disabled" (the mode proxy is not manual)
+
+
+Let's configure the proxy in manual mode
+
+>>> config.property.read_write()
+>>> config.option('rougail.proxy.proxy_mode').value.set('Manual proxy configuration')
+>>> config.option('rougail.proxy.manual.http_proxy.address').value.set('proxy.example')
+>>> pprint(config.value.get(), sort_dicts=False)
+
+We can see that the returned variables does have the desired values:
+
+.. code-block:: python
+
+    {'rougail.proxy.proxy_mode': 'Manual proxy configuration',
+     'rougail.proxy.manual.http_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.http_proxy.port': '8080',
+     'rougail.proxy.manual.use_for_https': True}
+
+Let's set the `read_only` mode and have a look at the configuration again:
+
+.. code-block:: python
+
+    >>> config.property.read_only()
+    >>> pprint(config.value.get(), sort_dicts=False)
+    {'rougail.proxy.proxy_mode': 'Manual proxy configuration',
+     'rougail.proxy.manual.http_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.http_proxy.port': '8080',
+     'rougail.proxy.manual.use_for_https': True,
+     'rougail.proxy.manual.ssl_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.ssl_proxy.port': '8080'}
+
+In the `read_only` mode, we can see that the HTTPS configuration appears.
+
+.. note:: We can see that `rougail.proxy.manual.http_proxy` values have been copied
+          in `rougail.proxy.manual.ssl_proxy` too.
+
+Changing values programmatically
+--------------------------------------
+
+We are going to use the :term:`Tiramisu` API to manipulate programmatically the different variables.
+
+First, let's set `rougail.proxy.manual.use_for_https` to `False`. It is now possible
+to configure the HTTPS:
+
+.. code-block:: python
+
+    >>> config.property.read_write()
+    >>> config.option('rougail.proxy.manual.use_for_https').value.set(False)
+    >>> config.option('rougail.proxy.manual.ssl_proxy.address').value.set('other.proxy.example')
+    >>> pprint(config.value.get(), sort_dicts=False)
+    {'rougail.proxy.proxy_mode': 'Manual proxy configuration',
+     'rougail.proxy.manual.http_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.http_proxy.port': '8080',
+     'rougail.proxy.manual.use_for_https': False,
+     'rougail.proxy.manual.ssl_proxy.address': 'other.proxy.example',
+     'rougail.proxy.manual.ssl_proxy.port': '8080'}
+
+The value of the variable `rougail.proxy.manual.ssl_proxy.address` has actually been modified.
+But if this variable is hidden again, then the value comes back to the default value:
+
+.. code-block:: python
+
+    >>> config.option('rougail.proxy.manual.use_for_https').value.set(False)
+    >>> config.property.read_only()
+    >>> pprint(config.value.get(), sort_dicts=False)
+    {'rougail.proxy.proxy_mode': 'Manual proxy configuration',
+     'rougail.proxy.manual.http_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.http_proxy.port': '8080',
+     'rougail.proxy.manual.use_for_https': False,
+     'rougail.proxy.manual.ssl_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.ssl_proxy.port': '8080'}
+
+SOCK's proxy configuration
+-------------------------------
+
+Let's add a new :term:`subfamily` named `socks_proxy` with the `address`,
+`port` and `version` variables.
+
+Let's create the :file:`dict/06-proxy_manual_socks_proxy.yml` file:
+
+.. code-block:: yaml
+   :caption: the :file:`dict/06-proxy_manual_socks_proxy.yml` file
+
+    ---
+    version: '1.1'
+    proxy:
+      manual:
+        socks_proxy:
+          description: SOCKS Proxy
+          address:
+            description: SOCKS Address
+            type: domainname
+          port:
+            description: SOCKS Port
+            type: port
+          version:
+            description: SOCKS host version used by proxy
+            type: choice
+            choices:
+              - v4
+              - v5
+            default: v5
+
+There's nothing new to learn with this file.
+
+The automatic detection mode
+------------------------------
+
+Let's add a new variable named `auto`.
+
+Let's create the :file:`dict/07-proxy_auto.yml` file:
+
+.. code-block:: yaml
+   :caption: the :file:`dict/07-proxy_auto.yml` file
+
+    ---
+    version: '1.1'
+    proxy:
+      auto:
+        type: web_address
+        description: Automatic proxy configuration URL
+        disabled:
+          type: jinja
+          jinja: |
+            {% if rougail.proxy.proxy_mode != 'Automatic proxy configuration URL' %}
+            the proxy mode is not automatic
+            {% endif %}
+
+The `web_address` type imposes a value starting with `http://` or `https://`.
+This variable is activated when the proxy is in automatic mode.
+
+The proxy's exceptions
+---------------------------
+
+Finally, let's add a variable containing proxy exceptions.
+
+Let's create the :file:`dict/07-proxy_no_proxy.yml` file:
+
+.. code-block:: yaml
+   :caption: the :file:`dict/07-proxy_no_proxy.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      no_proxy:
+        description: Address for which proxy will be desactivated
+        multi: true
+        type: "domainname"
+        params:
+          allow_ip: true
+          allow_cidr_network: true
+          allow_without_dot: true
+          allow_startswith_dot: true
+        disabled:
+          type: jinja
+          jinja: |
+            {% if rougail.proxy.proxy_mode == 'No proxy' %}
+            proxy mode is no proxy
+            {% endif %}
+        mandatory: false
+
+This `no_proxy` variable is much like a `domainname` type except that we add
+a `params` line 7, we authorize the :
+
+- IP
+- CIDR networks
+- machine names (without `'.'`)
+- sub-domaines like `.example`
+
+There can be multiple exceptions to the proxy, so the variable is :term:`multi` (line5).
+This variable is only accessible if no proxy is defined (`disabled`).
+
+.. glossary::
+
+   multi
+
+       A multi is a multiple variable, that is a variable that can have multiple values.
+
+
+The `no_proxy` variable do not requires a value (that is, `None` is an option),
+there is line 19 this statement `mandatory: false` which means that this variable is not mandatory.
+
+
+Let's test it:
+
+
+>>> from rougail import Rougail, RougailConfig
+>>> from pprint import pprint
+>>> RougailConfig['dictionaries_dir'] = ['dict']
+>>> rougail = Rougail()
+>>> config = rougail.get_config()
+>>> config.property.read_write()
+>>> config.option('rougail.proxy.proxy_mode').value.set('Manual proxy configuration')
+>>> config.option('rougail.proxy.manual.http_proxy.address').value.set('proxy.example')
+>>> config.option('rougail.proxy.no_proxy').value.set(['.example', '192.168.1.1'])
+>>> config.property.read_only()
+>>> pprint(config.value.get(), sort_dicts=False)
+
+It outputs:
+
+.. code-block:: python
+
+    {'rougail.proxy.proxy_mode': 'Manual proxy configuration',
+     'rougail.proxy.manual.http_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.http_proxy.port': '8080',
+     'rougail.proxy.manual.use_for_https': True,
+     'rougail.proxy.manual.ssl_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.ssl_proxy.port': '8080',
+     'rougail.proxy.manual.socks_proxy.address': None,
+     'rougail.proxy.manual.socks_proxy.port': None,
+     'rougail.proxy.manual.socks_proxy.version': 'v5',
+     'rougail.proxy.no_proxy': ['.example', '192.168.1.1']}
+
+But not possible to put an invalid value:
+
+.. code-block:: python
+
+    >>> config.option('rougail.proxy.no_proxy').value.set(['.example', '192.168.1.1', 'not valid'])
+    [..]
+    tiramisu.error.ValueOptionError: "not valid" is an invalid domain name for "Address for which proxy will be desactivated", could be a IP, otherwise must start with lowercase characters followed by lowercase characters, number, "-" and "." characters are allowed
+
+
+The authentification request
+--------------------------------
+
+Nothing special when creating the authentication request. To do this, let's create a `dict/08-proxy_prompt_authentication.yml` file:
+
+
+.. code-block:: yaml
+   :caption: the :file:`dict/08-proxy_prompt_authentication.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      prompt_authentication:
+        description: Prompt for authentication if password is saved
+        type: boolean
+        default: true
+        disabled:
+          type: jinja
+          jinja: |
+            {% if rougail.proxy.proxy_mode == 'No proxy' %}
+            proxy mode is no proxy
+            {% endif %}
+
+The proxy SOCKS v5's DNS
+------------------------------
+
+The DNS variable for the SOCKS v5 proxy only appears if the proxy is configured and the version of the SOCKS proxy selected is `v5`.
+
+Let's create a `dict/09-proxy_proxy_dns_socks5.yml` file:
+
+.. code-block:: yaml
+   :caption: the :file:`dict/09-proxy_proxy_dns_socks5.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      proxy_dns_socks5:
+        description: Use proxy DNS when using SOCKS v5
+        type: boolean
+        default: false
+        disabled:
+          type: jinja
+          params:
+            socks_version:
+              type: variable
+              variable: rougail.proxy.manual.socks_proxy.version
+              propertyerror: false
+          jinja: |
+            {% if rougail.proxy.proxy_mode == 'No proxy' %}
+            the proxy mode is no proxy
+            {% elif socks_version is undefined or socks_version == 'v4' %}
+            socks version is v4
+            {% endif %}
+
+The difficulty here is that the  `rougail.proxy.manual.socks_proxy.version` variable
+can be deactivated (and therefore not usable in a calculation).
+
+.. FIXME definir ce qu'est une calculation
+
+In this case, we will add a parameter (here called `socks_version`) which will contain,
+if there is no property error, the value of the variable.
+Otherwise the parameter will not be passed to the Jinja template.
+
+This is why it is necessary to test in the Jinja template whether the `socks_version` variable really exists.
+
+The DNS over HTTPS
+----------------------
+
+Finally we will configure DNS over HTTPS in the 10-proxy_dns_over_https.yml file:
+
+Let's create a `dict/10-proxy_dns_over_https.yml` file:
+
+.. code-block:: yaml
+   :caption: the :file:`dict/10-proxy_dns_over_https.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      dns_over_https:
+        description: DNS over HTTPS
+        enable_dns_over_https:
+          description: Enable DNS over HTTPS
+          type: boolean
+          default: false
+        provider:
+          description: Use Provider
+          type: choice
+          choices:
+            - Cloudflare
+            - NextDNS
+            - Custom
+          default: Cloudflare
+          disabled:
+            type: jinja
+            jinja: |
+              {% if not rougail.proxy.dns_over_https.enable_dns_over_https %}
+              Enable DNS over HTTPS is False
+              {% endif %}
+        custom_dns_url:
+          description: Custom DNS URL
+          type: web_address
+          disabled:
+            type: jinja
+            params:
+              provider:
+                type: variable
+                variable: rougail.proxy.dns_over_https.provider
+                propertyerror: false
+            jinja: |
+              {% if provider is not defined or provider != 'Custom' %}
+              provider is not custom
+              {% endif %}
+          validators:
+            - type: jinja
+              jinja: |
+                {% if rougail.proxy.dns_over_https.custom_dns_url.startswith('http://') %}
+                only https is allowed
+                {% endif %}
+
+.. FIXME : define validators
+
+The only particularity here is that we added additional validation (validators) to the `custom_dns_url` variable. Only an address starting with `https://` is allowed (not `http://`).
+
+----
+
+The FoxyProxy type's proxy configuration
+--------------------------------------------
+
+Here is now the integration of part of the Firefox FoxyProxy plugin.
+
+The idea is to have a namespace specific to FoxyProxy and to find in it part of the settings that we will have made in the main namespace.
+
+This is what the page looks like:
+
+.. image:: images/foxyproxy.png
+
+It is possible, in this plugin, to specify an unlimited number of proxies.
+Our `proxy` family will no longer be of the `family` type as before but of another type : the :term:`leadership` type.
+
+.. FIXME: expliquer ce qu'est le type leardership
+
+Here is the complete content of the FoxyProxy type proxy configuration
+(to be put in the `foxyproxy/00-base.yml` file):
+
+.. code-block:: yaml
+   :caption: the :file:``foxyproxy/00-base.yml`` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      _type: leadership
+      title:
+        description: Title or Description
+        multi: true
+      color:
+        description: Color
+      type:
+        type: choice
+        choices:
+          - HTTP
+          - HTTPS/SSL
+          - SOCKS5
+          - SOCKS4
+          - PAC URL
+          - WPAD
+          - System (use system settings)
+          - Direct (no proxy)
+        default: Direct (no proxy)
+      address:
+        description: IP address, DNS name, server name
+        multi: true
+        disabled:
+          type: jinja
+          jinja: |
+            {% if foxyproxy.proxy.type not in ['HTTP', 'HTTPS/SSL', 'SOCKS5', 'SOCKS4'] %}
+            proxy does not need address
+            {% endif %}
+        default:
+          type: jinja
+          params:
+            firefox_address:
+              type: variable
+              variable: rougail.proxy.manual.http_proxy.address
+              propertyerror: false
+          jinja: |
+            {% if firefox_address is not undefined %}
+            {{ firefox_address }}
+            {% endif %}
+      port:
+        description: Port
+        type: port
+        default:
+          type: jinja
+          params:
+            firefox_port:
+              type: variable
+              variable: rougail.proxy.manual.http_proxy.port
+              propertyerror: false
+          jinja: |
+            {% if firefox_port is not undefined %}
+            {{ firefox_port }}
+            {% endif %}
+        disabled:
+          type: jinja
+          jinja: |
+            {% if foxyproxy.proxy.type not in ['HTTP', 'HTTPS/SSL', 'SOCKS5', 'SOCKS4'] %}
+            proxy does not need port
+            {% endif %}
+      username:
+        description: Username
+        type: unix_user
+        mandatory:
+          type: jinja
+          jinja: |
+            {% if foxyproxy.proxy.password %}
+            username is mandatory
+            {% endif %}
+        disabled:
+          type: jinja
+          jinja: |
+            {% if foxyproxy.proxy.type not in ['HTTP', 'HTTPS/SSL', 'SOCKS5', 'SOCKS4'] %}
+            proxy does not need username
+            {% endif %}
+      password:
+        description: Password
+        type: secret
+        disabled:
+          type: jinja
+          jinja: |
+            {% if foxyproxy.proxy.type not in ['HTTP', 'HTTPS/SSL', 'SOCKS5', 'SOCKS4'] %}
+            proxy does not need password
+            {% endif %}
+      url:
+        type: web_address
+        disabled:
+          type: jinja
+          jinja: |
+            {% if foxyproxy.proxy.type not in ['PAC URL', 'WPAD'] %}
+            proxy does not need url
+            {% endif %}
+
+
+A few comments:
+
+- in the `foxyproxy.proxy` :term:`leader` family there is a variable named `type` (line 4), this may conflict with the `type` attribute (specified line 10). In this case, to specify the type we use the `_type` attribute
+- a :term:`follower` variable can also be multiple
+  (which is the case for `foxyproxy.proxy.address`)
+- `foxyproxy.proxy.username` (line 62) becomes :term:`mandatory` if `foxyproxy.proxy.password`
+  is specified, in fact a password without a username is meaningless
+
+Let's test it:
+
+>>> from rougail import Rougail, RougailConfig
+>>> from pprint import pprint
+>>> RougailConfig['dictionaries_dir'] = ['dict']
+>>> RougailConfig['extra_dictionaries']['foxyproxy'] = ['foxyproxy/']
+>>> rougail = Rougail()
+>>> config = rougail.get_config()
+>>> config.option('rougail.proxy.proxy_mode').value.set('Manual proxy configuration')
+>>> config.option('rougail.proxy.manual.http_proxy.address').value.set('proxy.example')
+>>> config.option('foxyproxy.proxy.title').value.set(['MyProxy'])
+>>> config.option('foxyproxy.proxy.type', 0).value.set('HTTP')
+>>> config.option('foxyproxy.proxy.color', 0).value.set('#00000')
+>>> config.property.read_only()
+>>> pprint(config.value.get(), sort_dicts=False)
+
+The output is:
+
+.. code-block:: python
+
+    {'rougail.proxy.proxy_mode': 'Manual proxy configuration',
+     'rougail.proxy.manual.http_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.http_proxy.port': '8080',
+     'rougail.proxy.manual.use_for_https': True,
+     'rougail.proxy.manual.ssl_proxy.address': 'proxy.example',
+     'rougail.proxy.manual.ssl_proxy.port': '8080',
+     'rougail.proxy.manual.socks_proxy.address': None,
+     'rougail.proxy.manual.socks_proxy.port': None,
+     'rougail.proxy.manual.socks_proxy.version': 'v5',
+     'rougail.proxy.no_proxy': [],
+     'rougail.proxy.proxy_dns_socks5': False,
+     'rougail.proxy.dns_over_https.enable_dns_over_https': False,
+     'foxyproxy.proxy.title': [{'foxyproxy.proxy.title': 'MyProxy',
+                                'foxyproxy.proxy.color': '#00000',
+                                'foxyproxy.proxy.type': 'HTTP',
+                                'foxyproxy.proxy.address': ['proxy.example'],
+                                'foxyproxy.proxy.port': '8080',
+                                'foxyproxy.proxy.username': None,
+                                'foxyproxy.proxy.password': None}]}
+
+The choice we made here is to make `foxyproxy.proxy.username` :term:`mandatory` if a password is specified in the `foxyproxy.proxy.password` variable.
+
+It makes sense to have a username without a password (in this case the password will be requested when connecting to the proxy). But the opposite does not make sense.
+
+From a user point of view this may seem disturbing (if you enter the password, you have to return to the previous option to specify the password).
+
+It is possible to reverse the logic. If the `foxyproxy.proxy.username` variable is set, the `foxyproxy.proxy.password` variable becomes editable.
+
+None of this two variables needs to be :term:`mandatory`.
+
+If you prefer this option, here is a second extra dictionary :file:`foxyproxy/01-redefine.yml` which will redefine the behavior only of the `foxyproxy.proxy.username` and `foxyproxy.proxy.password` variables:
+
+
+
+
+.. code-block:: yaml
+   :caption: the :file:`foxyproxy/01-redefine.yml` file
+   :linenos:
+
+    ---
+    version: '1.1'
+    proxy:
+      username:
+        redefine: true
+        # suppress mandatory constrainte
+        mandatory: false
+      password:
+        redefine: true
+        hidden:
+          type: jinja
+          jinja: |
+            {% if not foxyproxy.proxy.username %}
+            no username defined
+            {% endif %}
+
+
+**It's up to you to play now !**