rougail/docs/tutorial/boolean.rst

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A new variable which has the `boolean` type
===============================================
.. objectives:: Objectives
In this section we will learn:
- how to make a boolean type variable
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- how to reuse some value of a variable
(in this use case we will reuse the HTTP configuration variables values for the HTTPS configuration)
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.. prerequisites:: Reminders
Let's summarize the configuration up to here
Whe have the `proxy_mode` configuration here:
.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_030/firefox/00-proxy.yml
:language: yaml
:caption: firefox/00-proxy.yml
..
---
proxy_mode:
description: Configure Proxy Access to the Internet
choices:
- No proxy
- Auto-detect proxy settings for this network
- Use system proxy settings
- Manual proxy configuration
- Automatic proxy configuration URL
default: No proxy
With the manual subfamily in case of the "Manual proxy configuration" configuration option has been chosen:
.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_030/firefox/10-manual.yml
:language: yaml
:caption: firefox/10-manual.yml
..
---
manual:
description: Manual proxy configuration
disabled:
variable: proxy_mode
when_not: 'Manual proxy configuration'
http_proxy:
description: HTTP Proxy
address:
description: HTTP address
type: domainname
params:
allow_ip: true
port:
description: HTTP Port
type: port
default: 8080
.. type-along:: The HTTPS mode
Now we will focus on configuring the HTTPS mode in case of "Manual proxy configuration".
.. image:: images/firefox_manual_https.png
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Let's set two other variables for the HTTPS use only:
.. confval:: https_proxy.address
:type: `domainname`
This is an address setting for the manual HTTPS configuration
.. confval:: https_proxy.port
:type: `port`
This is a port setting for the manual HTTPS configuration
- So we have a `manual.http_proxy.address` variable and a `manual.https_proxy.address` variable
- In the same way, we have a `manual.http_proxy.port` variable and a `manual.https_proxy.port` variable
.. type-along:: What do we want to reuse?
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Do we want to reuse, for the HTTPS mode, the same configuration as for the HTTP mode?
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It depends on the context.
.. glossary::
context
A configuration is highly statefull and can change at any moment.
Sometimes somes minor changes in the :term:`user datas` involves chain reactions
in the whole :term:`configuration`.
The context is the state of the user datas at one moment, this term also refers
to the ability of a system to handle the *statefull* state of a configuration.
It expresses the transition between one situation to another situation,
that is, the deeply **statefull** aspects.
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A new `boolean` type variable
-------------------------------
We have a new variable, named `use_for_https` here:
.. confval:: use_for_https
:type: `boolean`
:default: `true`
This is a setting that enables to reuse the HTTP proxy configuration for HTTPS
Its description in the structure file gives us this:
.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_030/firefox/20-manual.yml
:language: yaml
:caption: firefox/20-manual.yml
..
---
manual:
use_for_https:
description: Also use this proxy for HTTPS
type: boolean
default: true
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.. type-along:: Update of the context
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So now we have three new variables in the manual mode of the http proxy configuration.
.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/commit/v1.1_032/firefox/20-manual.yml
:language: yaml
:caption: firefox/20-manual.yml
..
---
manual:
use_for_https:
description: Also use this proxy for HTTPS
default: true
https_proxy:
description: HTTPS Proxy
address:
description: HTTPS address
type: domainname
params:
allow_ip: true
port:
description: HTTPS Port
type: port
default: 8080
And with this :confval:`use_for_https` boolean variable, there are two possibilities, and only two:
- The http proxy's configuration will be reused for the https proxy's configuration
- The http proxy's will not be reused for the https proxy's configuration
.. questions:: Question: disabled?
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Is it relevant to use the :term:`disabled property <disabled>` here?
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**answer**: No! Because we *need* to use these variables at any case,
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we simply have to point their values in one direction or another depending on this or that context.
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It is absolutely not a question of deactivating them. The `manual.https_proxy.address`
and the `manual.http_proxy.port` variables shall not be disabled (deactivated) in the manual mode.
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Let's introduce here a new concept.
The hidden property
---------------------
.. glossary::
hidden
A variable or family's property is hidden if its value shall not be seen in a given consistency.
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Anyway, these variables can be used again if the context evolves. This is the main difference
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between the `hidden` and the `disabled` properties.
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Now we can set a `hidden` property to the `https_proxy` family:
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.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_033/firefox/20-manual.yml
:language: yaml
:caption: The `https_proxy` subfamily with the `hidden` property
:name: HiddenPropertySubfamily
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..
---
manual:
use_for_https:
description: Also use this proxy for HTTPS
default: true
https_proxy:
description: HTTPS Proxy
hidden: true
address:
description: HTTPS address
type: domainname
params:
allow_ip: true
port:
description: HTTPS Port
type: port
default: 8080
The whole `https_proxy` family has been set to `hidden` here.
.. type-along:: A `hidden` variable with the `mandatory` parameter set still shall have a defined value
If we choose the manual proxy configuration mode,
.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_033/config/03/config.yaml
:language: yaml
:caption: The Manual proxy configuration value is set
..
---
proxy_mode: Manual proxy configuration
Note that in this context, if we don't set a value to the `manual.http_proxy.address` mandatory variable, even if it is `hidden`,
Rougail will raise an error:
.. todo:: Ce raw html là est sur manual.http_proxy.address et pas manual.https_proxy.address
.. raw:: html
:url: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_033/config/03/output_ro.html
:class: error-box
..
<pre>🛑 ERRORS
<span style="color: #ff0000">┣━━ </span>The following variables are mandatory but have no value:
<span style="color: #ff0000">┗━━ </span> - manual.http_proxy.address (HTTP address)
</pre>
A conditional hidden family with a boolean variable
--------------------------------------------------------
But we want this `hidden` property to be assigned dynamically depending on the `use_for_https` `true` or `false` value.
How to achieve this.
It is possible to add a `variable` parameter to the `hidden` attribute like this:
.. extinclude:: https://forge.cloud.silique.fr/stove/rougail-tutorials/raw/tag/v1.1_034/firefox/20-manual.yml
:language: yaml
:caption: The hidden property now depends on the value of `manual.use_for_https`
..
---
manual:
use_for_https:
description: Also use this proxy for HTTPS
default: true
https_proxy:
description: HTTPS Proxy
hidden:
variable: manual.use_for_https
address:
description: HTTPS address
type: domainname
params:
allow_ip: true
port:
description: HTTPS Port
type: port
default: 8080
.. keypoints:: Key points
**Keywords**
- The :term:`hidden` property set to a family
- The fact that a property can be set dynamically
- The conditional dependency of a `hidden` property that depends on a `boolean` variable.
**Progress**
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We have arrived at the end of the proxy's manual configuration's section.