- [Summary](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/branch/1.1/README.md)
- [[tutorial v1.1_003] Set a default value](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_003/README.md) ([diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_003~1..v1.1_003))

# [tutorial v1.1_004)] Limits the possible values for the variable

[View the diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_004~1..v1.1_004)


## Screenshot


<img src="firefox.png" width=50% height=50% alt="Firefox Proxy setting"/>


## Clone and install



To test this tutorial, you need to download this repository and install Rougail:

```shell
git clone -b 1.1 https://forge.cloud.silique.fr/stove/rougail-tutorials.git
cd rougail-tutorials
python -m venv venv_rougail
. venv_rougail/bin/activate
pip install rougail-cli rougail-output-exporter rougail-output-doc rougail-user-data-yaml
```

Then switch to the tutorial page:

```shell
git switch --detach v1.1_004
```

## Structure



<p>
<a href="https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_004/./">.</a><br/>
	└── <a href="https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_004/./firefox/">firefox</a><br/>
	    └── <a href="https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_004/./firefox/00-proxy.yml">00-proxy.yml</a><br/>
<br/><br/></p>

Contents of the firefox/00-proxy.yml file

```yml
%YAML 1.2
---
version: 1.1

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
...

```
### Let's generate the documentation

```shell
rougail -m firefox/ -o doc
```
| Variable&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   | Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **proxy_mode**<br/>[`choice`](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                                                                                                                                                                                                                                                                                                                                                                                                                    | Configure Proxy Access to the Internet.<br/>**Choices**: <br/>- No proxy **← (default)**<br/>- Auto-detect proxy settings for this network<br/>- Use system proxy settings<br/>- Manual proxy configuration<br/>- Automatic proxy configuration URL                                                                                                                                                                                                                                                                                   |

### Let's generate the changelog

```shell
rougail -m firefox/ -o doc --doc.contents changelog
```
#### Modified variable

| Variable&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   | Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **proxy_mode**<br/>~~`string`~~ [<ins>`choice`</ins>](https://rougail.readthedocs.io/en/latest/variable.html#variables-types) `mandatory`                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            | Configure Proxy Access to the Internet.<br/>**Choices**: <br/>- No proxy **← (default)**<br/>- <ins>Auto-detect proxy settings for this network</ins><br/>- <ins>Use system proxy settings</ins><br/>- <ins>Manual proxy configuration</ins><br/>- <ins>Automatic proxy configuration URL</ins>                                                                                                                                                                                                                                                                                                                                                                                       |


## User datas

### Example 1

#### config/01/config.yml


```yml
---
```
#### Output

```shell
rougail -m firefox/ -u yaml -yf config/01/config.yml
```
<pre>╭─────── Caption ────────╮
│ Variable <span style="color: #ffd700">Default value</span> │
╰────────────────────────╯
Variables:
<span style="color: #5c5cff">┗━━ </span>📓 Configure Proxy Access to the Internet: <span style="color: #ffd700">No proxy</span>
</pre>
### Example 2

#### config/02/config.yml


```yml
---
proxy_mode: No proxy
```
#### Output

```shell
rougail -m firefox/ -u yaml -yf config/02/config.yml
```
<pre>╭────────────── Caption ───────────────╮
│ Variable Modified value              │
│          (<span style="color: #00aa00">⏳ Original default value</span>) │
╰──────────────────────────────────────╯
Variables:
<span style="color: #5c5cff">┗━━ </span>📓 Configure Proxy Access to the Internet: No proxy ◀ loaded from the YAML file "config/02/config.yml" (⏳ <span style="color: #00aa00">No proxy</span>)
</pre>
### Example 3

#### config/03/config.yml


```yml
---
proxy_mode: Manual proxy configuration
```
#### Output

```shell
rougail -m firefox/ -u yaml -yf config/03/config.yml
```
<pre>╭────────────── Caption ───────────────╮
│ Variable Modified value              │
│          (<span style="color: #00aa00">⏳ Original default value</span>) │
╰──────────────────────────────────────╯
Variables:
<span style="color: #5c5cff">┗━━ </span>📓 Configure Proxy Access to the Internet: Manual proxy configuration ◀ loaded from the YAML file "config/03/config.yml" (⏳ <span style="color: #00aa00">No proxy</span>)
</pre>
### Example 4

#### config/04/config.yml


```yml
---
proxy_mode: foo
```
#### Output

```shell
rougail -m firefox/ -u yaml -yf config/04/config.yml
```
<pre><span style="font-weight: bold; color: #ffff00">🔔 WARNINGS</span>
<span style="color: #ffff00">┗━━ </span>the value "foo" is an invalid choice for "proxy_mode" (Configure Proxy Access to the Internet), only "Auto-detect proxy settings for this network", "Automatic proxy configuration URL", "Manual proxy 
<span style="color: #ffff00">    </span>configuration", "No proxy" and "Use system proxy settings" are allowed, it will be ignored when loading from the YAML file "config/04/config.yml"
╭─────── Caption ────────╮
│ Variable <span style="color: #ffd700">Default value</span> │
╰────────────────────────╯
Variables:
<span style="color: #5c5cff">┗━━ </span>📓 Configure Proxy Access to the Internet: <span style="color: #ffd700">No proxy</span>
</pre>
#### Output when invalid user datas is an error

```shell
rougail -m firefox/ -u yaml -yf config/04/config.yml --cli.invalid_user_datas_error
```
<pre><span style="font-weight: bold; color: #ff0000">🛑 ERRORS</span>
<span style="color: #ff0000">┗━━ </span>the value "foo" is an invalid choice for "proxy_mode" (Configure Proxy Access to the Internet), only "Auto-detect proxy settings for this network", "Automatic proxy configuration URL", "Manual proxy 
<span style="color: #ff0000">    </span>configuration", "No proxy" and "Use system proxy settings" are allowed, it will be ignored when loading from the YAML file "config/04/config.yml"
</pre>


- [[tutorial v1.1_010] Creating a new family](https://forge.cloud.silique.fr/stove/rougail-tutorials/src/commit/v1.1_010/README.md) ([diff](https://forge.cloud.silique.fr/stove/rougail-tutorials/compare/v1.1_010~1..v1.1_010))