PHPStan Namespace Constraints Rule

This repository contains the code for the namespace_constraints rule for PHPStan.

Why?

In the most architectures you should not depend on everything. With this rule you can ensure that a source namespace (RegEx Pattern) can only depend on code that lives in the target namespaces.

Installation

$ composer require --dev mintware-de/phpstan-namespace-constraints

Configuration

Add this to your phpstan.neon

# phpstan.neon
includes:
    - vendor/mintware-de/phpstan-namespace-constraints/src/Rules/rules.neon

parameters:
    namespace_constraints:
        constraints:
            - from: 'App\\SourceNamespace(\\.*)?' # Everything inside this namespace has access to
              to: ['App\\SourceNamespace(\\.*)?'] # this namespace

Examples

Simple

graph TD;
    App\Data-->App\Core;
    App\UserInterface-->App\Data;

Loading

# phpstan.neon
includes:
    - vendor/mintware-de/phpstan-namespace-constraints/src/Rules/rules.neon

parameters:
    namespace_constraints:
        constraints:
            - from: 'App\\Core(\\.*)?'
              to: ['App\\Core(\\.*)?']
            - from: 'App\\Data(\\.*)?'
              to: 
                - 'App\\Core(\\.*)?'
                - 'App\\Data(\\.*)?'
            - from: 'App\\UserInterface(\\.*)?'
              to: 
                - 'App\\Core(\\.*)?'
                - 'App\\Data(\\.*)?'
                - 'App\\UserInterface(\\.*)?'

Advanced

graph TD;
    App\User\Core-->App\Shared\Core
    App\Blog\Core-->App\Shared\Core
    App\*\Core-->App\Shared\Core

Loading

# phpstan.neon
includes:
    - vendor/mintware-de/phpstan-namespace-constraints/src/Rules/rules.neon

parameters:
    namespace_constraints:
        constraints:
            # App\User Constraints
            - from: 'App\\User\\Core(\\.*)?'
              to: ['App\\User\\Core(\\.*)?']
            # App\\Blog\ Constraints
            - from: 'App\\Blog\\Core(\\.*)?'
              to: ['App\\Blog\\Core(\\.*)?']
            # App\*\Core -> App\Shared\Core
            - from: 'App\\(\w+)\\Core(\\.*)?'
              to: ['App\\Shared\\Core(\\.*)?']