### Install Documentation Dependencies

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Install required Python dependencies for building documentation using pip.

```bash
pip install --requirement docs/requirements.txt --user
```

--------------------------------

### Install Sonata Exporter via Composer

Source: https://github.com/sonata-project/exporter/blob/3.x/docs/reference/installation.rst

Use this command to add the core library to your project dependencies.

```bash
composer require sonata-project/exporter
```

--------------------------------

### Install XLSX support via Composer

Source: https://github.com/sonata-project/exporter/blob/3.x/docs/reference/installation.rst

Required only if you need to export data in the XLSX format.

```bash
composer require phpoffice/phpspreadsheet
```

--------------------------------

### Good commit message subject example

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

An example of a concise and descriptive commit message subject.

```text
Document how to install the project
```

--------------------------------

### Exporting data with Sonata Exporter

Source: https://github.com/sonata-project/exporter/blob/3.x/docs/reference/introduction.rst

Demonstrates the basic setup using an iterator source and a writer to export data.

```php
// This can be any instance of \Iterator
$source = new ArraySourceIterator([/* your data */]);

// This could be any format supported
$writer = new JsonWriter('php://output');

$handler = Handler::create($source, $writer);
$handler->export();
```

--------------------------------

### PHPStan Annotation Example

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Use @phpstan- annotations for static analysis to maintain IDE support and consistency.

```php
/**
 * @param Bar|Baz      $foo
 * @param class-string $class
 * @param int          $limit a crucial, fascinating comment
 *
 * @return object
 *
 * @phpstan-template T of object
 * @phpstan-param class-string<T> $class
 * @phpstan-return T
 */
protected function bar($foo, string $class, int $limit): object
{
    // ...
}
```

--------------------------------

### Bad commit message subject example

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

An example of a vague commit message subject that lacks sufficient context.

```text
Update README.md
```

--------------------------------

### Commit message with description

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

An example of a commit message including a detailed description that provides context for the changes.

```text
Change web UI background color to pink

This is a consensus made on #4242 in addition to #1337.

We agreed that blank color is boring and so deja vu. Pink is the new way to do.
```

--------------------------------

### Commit message with technical explanation

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

An example of a commit message that states technical facts and explains the reasoning behind a fix.

```text
call foo::bar() instead of bar::baz()

This fixes a bug that arises when doing this or that, because baz() needs a
flux capacitor object that might not be defined.
Fixes #42
```

--------------------------------

### View Documentation Locally

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Open the generated documentation in a browser after running the build process.

```bash
$YOUR_FAVORITE_BROWSER docs/_build/html/index.html
```

--------------------------------

### Run PHP Coding Standard Fixer

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Execute this command before committing to ensure code adheres to project standards.

```bash
php-cs-fixer fix --verbose
```

--------------------------------

### Enable the SonataExporterBundle

Source: https://github.com/sonata-project/exporter/blob/3.x/docs/reference/symfony.rst

Register the bundle in the application's bundles configuration file.

```php
// config/bundles.php

return [
    // ...
    Sonata\Exporter\Bridge\Symfony\SonataExporterBundle::class => ['all' => true],
];
```

--------------------------------

### Configure writer settings

Source: https://github.com/sonata-project/exporter/blob/3.x/docs/reference/symfony.rst

Define custom settings for specific exporter formats in the package configuration file.

```yaml
# config/packages/sonata_exporter.yaml

sonata_exporter:
    writers:
        some_format:
            some_setting: some_value
```

--------------------------------

### Configure default writers

Source: https://github.com/sonata-project/exporter/blob/3.x/docs/reference/symfony.rst

Specify the list of default writers enabled for the exporter.

```yaml
# config/packages/sonata_exporter.yaml

sonata_exporter:
    exporter:
        default_writers:
            - csv
            - json
```

--------------------------------

### Marking code for future removal with NEXT_MAJOR

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Use the NEXT_MAJOR comment marker to indicate code that should be uncommented or reworked in a future major release.

```php
<?php

namespace Foo;

/**
 * @method void usefulMethod()
 */
interface BarInterface
{
  /**
   * NEXT_MAJOR: Uncomment this method
   *
   * This method does useful stuff.
   */
  // public function usefulMethod(): void;

  // …
}
```

--------------------------------

### Deprecate PHP classes, properties, and methods

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Use the @deprecated annotation for classes and properties. For methods, combine the annotation with @trigger_error to notify users at runtime.

```php
/**
 * NEXT_MAJOR: Remove this class.
 *
 * @deprecated since sonata-project/foo-lib 42.x, to be removed in 43.0. Use Shiny\New\ClassOfTheMonth instead.
 */
final class IAmOldAndUseless
{
}

final class StillUsedClass
{
    /**
     * NEXT_MAJOR: Remove this property.
     *
     * @deprecated since sonata-project/foo-lib 42.x, to be removed in 43.0.
     */
    public $butNotThisProperty;

    /**
     * NEXT_MAJOR: Remove this method.
     *
     * @deprecated since sonata-project/foo-lib 42.x, to be removed in 43.0.
     */
    public function iAmBatman()
    {
        @trigger_error(sprintf(
            'Method %s() is deprecated since sonata-project/foo-lib 42.x and will be removed in version 43.0.',
            __METHOD__
        ), \E_USER_DEPRECATED);

        echo "But this is not Gotham here.";
    }
}
```

--------------------------------

### Deprecate Symfony services

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Include a <deprecated> tag within the service definition in XML configuration files.

```xml
<!-- NEXT_MAJOR: Remove this service -->
<service id="sonata.block.old" class="Sonata\Block\Old">
    <argument type="service" id="security.token_storage" />
    <deprecated>The "%service_id%" service is deprecated since sonata-project/bar-bundle 42.x and will be removed in 43.0.</deprecated>
 </service>
```

--------------------------------

### Trigger deprecation for legacy logic

Source: https://github.com/sonata-project/exporter/blob/3.x/CONTRIBUTING.md

Use @trigger_error inside conditional blocks to warn users about legacy code paths.

```php
<?php
// NEXT_MAJOR: Remove this condition.
if (/* some condition showing the user is using the legacy way */) {
    @trigger_error(
        'This is deprecated since sonata-project/bar-bundle 42.x and will not be supported in version 43.0.',
        \E_USER_DEPRECATED
    );
} else {
    // new way of doing things
}
```

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