Migration to v0.2.0

This guide helps you migrate from Føhn v0.1.x to v0.2.0.

Breaking Changes

ViewComposer → ContextProvider

The ViewComposer system has been renamed to ContextProvider for clarity. This affects:

v0.1.x	v0.2.0
#[AsViewComposer]	#[AsContextProvider]
ViewComposerInterface	ContextProviderInterface
compose() method	provide() method
ViewComposerRegistry	ContextProviderRegistry
ViewComposerDiscovery	ContextProviderDiscovery
make:view-composer CLI	make:context-provider CLI
App\Views\Composers\	App\ContextProviders\

Migration Steps

1. Update Attribute Imports

Before:

use Studiometa\Foehn\Attributes\AsViewComposer;
use Studiometa\Foehn\Contracts\ViewComposerInterface;

After:

use Studiometa\Foehn\Attributes\AsContextProvider;
use Studiometa\Foehn\Contracts\ContextProviderInterface;

2. Update Class Definitions

Before:

#[AsViewComposer(templates: ['*'])]
final class GlobalComposer implements ViewComposerInterface
{
    public function compose(array $context): array
    {
        $context['site_name'] = get_bloginfo('name');
        return $context;
    }
}

After:

#[AsContextProvider(templates: ['*'])]
final class GlobalContextProvider implements ContextProviderInterface
{
    public function provide(array $context): array
    {
        $context['site_name'] = get_bloginfo('name');
        return $context;
    }
}

3. Move and Rename Files

Move your context providers from app/Views/Composers/ to app/ContextProviders/:

# Create new directory
mkdir -p app/ContextProviders

# Move and rename files
mv app/Views/Composers/GlobalComposer.php app/ContextProviders/GlobalContextProvider.php
mv app/Views/Composers/NavigationComposer.php app/ContextProviders/NavigationContextProvider.php
# ... repeat for all composers

4. Update Namespaces

Update the namespace in each file:

Before:

namespace App\Views\Composers;

After:

namespace App\ContextProviders;

5. Update composer.json (if needed)

If you have explicit PSR-4 mappings, update them:

{
  "autoload": {
    "psr-4": {
      "App\\": "app/"
    }
  }
}

Then run:

composer dump-autoload

6. Update Mago Configuration (if used)

If you use Mago for convention enforcement, update your mago.toml:

Before:

[[guard.structural.rules]]
on            = "App\\Views\\Composers\\**"
target        = "class"
must-be-named = "*Composer"
must-implement = "Studiometa\\Foehn\\Contracts\\ViewComposerInterface"

After:

[[guard.structural.rules]]
on            = "App\\ContextProviders\\**"
target        = "class"
must-be-named = "*ContextProvider"
must-implement = "Studiometa\\Foehn\\Contracts\\ContextProviderInterface"

Or simply re-copy the bundled config:

cp vendor/studiometa/foehn/resources/mago-theme.toml mago.toml

New Features

v0.2.0 also introduces several new features you can adopt:

Navigation Menus

Register menus declaratively with #[AsMenu]:

use Studiometa\Foehn\Attributes\AsMenu;

#[AsMenu(location: 'primary', description: 'Main Navigation')]
#[AsMenu(location: 'footer', description: 'Footer Links')]
final class NavigationMenus {}

See Menus Guide for details.

Image Sizes

Register custom image sizes with #[AsImageSize]:

use Studiometa\Foehn\Attributes\AsImageSize;

#[AsImageSize(name: 'card', width: 400, height: 300, crop: true)]
#[AsImageSize(name: 'hero', width: 1920, height: 800, crop: true)]
final class ImageSizes {}

See API: #[AsImageSize] for details.

ACF Options Pages

Create options pages with #[AsAcfOptionsPage]:

use Studiometa\Foehn\Attributes\AsAcfOptionsPage;
use Studiometa\Foehn\Contracts\AcfOptionsPageInterface;

#[AsAcfOptionsPage(
    pageTitle: 'Theme Settings',
    menuSlug: 'theme-settings',
)]
final class ThemeSettings implements AcfOptionsPageInterface
{
    public static function fields(): FieldsBuilder
    {
        return (new FieldsBuilder('theme_settings'))
            ->addText('site_name');
    }
}

See ACF Options Pages Guide for details.

ACF Field Groups (Non-Block)

Register field groups for posts, pages, etc. with #[AsAcfFieldGroup]:

use Studiometa\Foehn\Attributes\AsAcfFieldGroup;
use Studiometa\Foehn\Contracts\AcfFieldGroupInterface;

#[AsAcfFieldGroup(location: 'post_type == page')]
final class PageSettings implements AcfFieldGroupInterface
{
    public static function fields(): FieldsBuilder
    {
        return (new FieldsBuilder('page_settings'))
            ->addTrueFalse('show_sidebar');
    }
}

DisableBlockStyles Hook

Dequeue Gutenberg block styles for themes not using blocks:

use Studiometa\Foehn\Kernel;
use Studiometa\Foehn\Hooks\Cleanup\DisableBlockStyles;

Kernel::boot(__DIR__ . '/app', [
    'hooks' => [
        DisableBlockStyles::class,
    ],
]);

Enhanced CLI Commands

The --dry-run flag is now available on scaffolding commands:

wp foehn make:context-provider Header --dry-run
wp foehn make:acf-block Hero --dry-run

Bundled Mago Configuration

Copy the ready-to-use Mago config for theme conventions:

cp vendor/studiometa/foehn/resources/mago-theme.toml mago.toml
mago guard

Search & Replace Cheatsheet

Quick sed commands for bulk migration:

# Update imports
find app -name "*.php" -exec sed -i '' 's/AsViewComposer/AsContextProvider/g' {} +
find app -name "*.php" -exec sed -i '' 's/ViewComposerInterface/ContextProviderInterface/g' {} +

# Update method names
find app -name "*.php" -exec sed -i '' 's/public function compose(/public function provide(/g' {} +

# Update namespaces (adjust paths as needed)
find app/Views/Composers -name "*.php" -exec sed -i '' 's/namespace App\\Views\\Composers/namespace App\\ContextProviders/g' {} +

Troubleshooting

Discovery Not Finding Context Providers

Ensure your namespace matches the directory structure in composer.json:

{
  "autoload": {
    "psr-4": {
      "App\\": "app/"
    }
  }
}

Run composer dump-autoload after moving files.

Method Not Found Error

If you see provide() method not found, you likely forgot to rename compose() to provide() in your class.

Mago Guard Failures

If Mago reports violations after migration, ensure:

1. Classes are in App\ContextProviders\ namespace
2. Class names end with ContextProvider
3. Classes implement ContextProviderInterface

See Also

• Context Providers Guide
• Theme Conventions
• Changelog