Contributing to Open Source: Gatekeeper Case Study

Contribute to open source project: a practical case

This article will explain in detail how to contribute code to open source projects through a practical case. We will take the GateKeeper library as an example to add a counting function and gradually demonstrate the entire process, including communication with the project owner, code implementation, testing, and submitting Pull Request.

Introduction to GateKeeper Library

GateKeeper is a PHP library for user registration, authentication, and authorization. It uses its own database to store and query user records. This makes it completely decoupled from the main application, making it easy to scale and modify.

Add counting function

At present, to get the total number of users in the database, GateKeeper needs to first obtain all user records, then count, or manually write SQL queries. To improve this, we will add a counting feature to the adapter interface to make it native and prepare for adding other database engines in the future.

Step 1: Communicate with the project owner

Before starting to contribute, first communicate with the project owner to confirm whether the feature has been planned and whether it is needed. Usually, it is only possible to propose it in the Issue of the project.

Step 2: Fork, Clone and Test

First, Fork project to your own GitHub repository. Then, Clone goes locally, install the dependencies and run the test:

git clone <你的fork地址>
cd gatekeeper
composer install
vendor/bin/phpunit

All tests should be passed. After that, create a new branch to develop:

git checkout -b "feature-count"

Step 3: Action Plan

GateKeeper currently only supports MySQL databases. We need to modify the following section:

• Gatekeeper/DataSource: Abstract DataSource class
• DataSource/MySQL: MySQL data source containing actual methods
• DataSource/Stub: Update Stub so that other contributors know that they need to add the count method

A new Count processor is also needed, because GateKeeper uses magic static calls to create, find, update, and delete entities.

Step 4: Code implementation

1. Delegate static call: Add a Gatekeeper::__callStatic block in elseif delegate the static call to the new Count processor. At the same time, update the $actions static properties.

2. Create Count Processor: Create Psecio/Gatekeeper/Handler/Count.php File, write the logic of the Count processor, which is similar to the Create processor, but performs a counting operation.

3. Modify DataSource and Stub: Add Psecio/Gatekeeper/DataSource/Stub.php method signature in count and abstract classes.

4. Implement the count method of MySQL data source: Implement the DataSource/MySQL.php method in count, which uses the COUNT(*) function of MySQL to count.

Step 5: Test

Create a new project, install the modified GateKeeper library using Composer, and perform tests. The test should cover various scenarios, such as counting all users, counting users based on conditions, etc.

Step 6: Submit Pull Request

Submit the code to your own Fork repository and create a Pull Request to submit code reviews to the project owner.

Summary

This article introduces in detail the process of contributing code to open source projects through a specific case. Although this case is relatively simple, it covers most of the steps that contribute to open source projects and provides a good reference for developers who want to participate in open source projects. Remember that testing and clear communication are key to successful contributions.

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