Managing GitHub Authentication in Composer-Based Projects

Introduction

You may encounter authentication issues when working with a composer-based project, especially when trying to download packages hosted on GitHub.

This article will help you to understand the issue and provide a solution on how you can solve or prevent this type of error in the future.

Understanding the issue

The common issue is a failure to authenticate against GitHub when trying to download dependencies. This problem often appears in the CCI environment in the following ways:

  • Incorrect or expired OAuth tokens, especially when dealing with private repositories.
  • Changes in the CI platform that restrict outgoing connections.
  • Problems with the CI environment's configuration (such as lacking a Git binary in PATH; git was not found in your PATH, skipping source download).
  • Misconfiguration or the absence of critical environment variables like COMPOSER_AUTH.

What triggers the issue

GitHub does not always require authentication, but this can sometimes change, causing rate limits to impact CCI's ability to access GH resources. Furthermore, the solutions often involve OAuth tokens, which have broad read/write permissions, potentially exposing users to unnecessary security risks. Therefore, following best practices is crucial when dealing with such tokens.

Solution

The issue is primarily related to rate limiting on GitHub's side. To mitigate this, you need to add authentication details in the composer.json file or modify an environment variable named COMPOSER_AUTH.

Adding Authentication to composer.json

Update your composer.json file with the following structure:

{
  "config": {
    "github-oauth": {
      "github.com": "<your personal classic github token>"
    }
  }
}

Replace <your personal classic github token> with your actual GitHub token.

Modifying the COMPOSER_AUTH environment variable

An alternative solution is to modify the COMPOSER_AUTH environment variable. You can tailor it to include the necessary authentication information.

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