Feature Flags

A package to manage feature flags in your application. Currently supporting these providers:

• LaunchDarkly

Installation

You can install the package via composer:

composer require worksome/feature-flags

You can publish the config file with:

php artisan vendor:publish --tag="feature-flags-config"

This is the contents of the published config file:

declare(strict_types=1);

use Worksome\FeatureFlags\ModelFeatureFlagConvertor;

// config for Worksome/FeatureFlags
return [
    'default' => env('FEATURE_FLAGS_PROVIDER', 'launchdarkly'),

    'convertor' => ModelFeatureFlagConvertor::class,

    'providers' => [
        'launchdarkly' => [
            'key' => env('LAUNCHDARKLY_SDK_KEY'),
            'options' => [
                /**
                 * https://docs.launchdarkly.com/sdk/features/offline-mode
                 */
                'offline' => env('LAUNCHDARKLY_OFFLINE', false)
            ],
            /**
             * @link https://docs.launchdarkly.com/home/account-security/api-access-tokens
             */
            'access-token' => env('FEATURE_FLAGS_API_ACCESS_TOKEN', null),
        ]
    ],

    /**
     * List of available overriders.
     * Key is to be used to specify which overrider should be active.
     */
    'overriders' => [
        'config' => [
            /**
             * Overrides all feature flags directly without hitting the provider.
             * This is particularly useful for running things in the CI,
             * e.g. Cypress tests.
             *
             * Be careful in setting a default value as said value will be applied to all flags.
             * Use `null` value if needing the key to be present but act as if it was not
             */
            'override-all' => null,

            /**
             * Override flags. If a feature flag is set inside an override,
             * it will be used instead of the flag set in the provider.
             *
             * Usage: ['feature-flag-key' => true]
             *
             * Be careful in setting a default value as it will be applied.
             * Use `null` value if needing the key to be present but act as if it was not
             *
             */
            'overrides' => [
                // ...
            ],
        ],
        'in-memory' => [
            // ...
        ]
    ],
];

Creating Feature Flags

Feature flags should be registered using one or more enums containing your feature flags.

All feature flag enums must implement the Worksome\FeatureFlags\Contracts\FeatureFlagEnum contract.

For example, if you had a feature flag called flag-one, you could create an enum with the following:

namespace App\Enums;

enum FeatureFlag: string implements \Worksome\FeatureFlags\Contracts\FeatureFlagEnum
{
    case FlagOne = 'flag-one';
}

Usage in Blade

@feature(\App\Enums\FeatureFlag::FlagOne)
    This is content under a feature flag.
@endfeature

Changelog

Please see the Releases for more information on what has changed recently.

Testing

We pride ourselves on a thorough test suite and strict static analysis. You can run all of our checks via a composer script:

composer test

To make it incredibly easy to contribute, we also provide a docker-compose file that will spin up a container with all the necessary dependencies installed. Assuming you have docker installed, just run:

docker-compose run --rm composer install # Only needed the first time
docker-compose run --rm composer test # Run tests and static analysis 

Support for XDebug is baked into the Docker image, you just need to configure the XDEBUG_MODE environment variable:

docker-compose run --rm -e XDEBUG_MODE=debug php

Security Vulnerabilities

Please review our security policy on how to report security vulnerabilities.

Credits

• Lukas Juhas
• All Contributors

License

The MIT License (MIT). Please see License File for more information.