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Contributing to Composer

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.

Reporting Issues

When reporting issues, please try to be as descriptive as possible, and include as much relevant information as you can. A step by step guide on how to reproduce the issue will greatly increase the chances of your issue being resolved in a timely manner.

For example, if you are experiencing a problem while running one of the commands, please provide full output of said command in very very verbose mode (-vvv, e.g. composer install -vvv).

If your issue involves installing, updating or resolving dependencies, the chance of us being able to reproduce your issue will be much higher if you share your composer.json with us.

Security Reports

Please send any sensitive issue to Thanks!

Installation from Source

Prior to contributing to Composer, you must be able to run the test suite. To achieve this, you need to acquire the Composer source code:

  1. Run git clone
  2. Download the composer.phar executable
  3. Run Composer to get the dependencies: cd composer && php ../composer.phar install

You can run the test suite by executing vendor/bin/phpunit when inside the composer directory, and run Composer by executing the bin/composer. To test your modified Composer code against another project, run php /path/to/composer/bin/composer inside that project's directory.

Contributing policy

Fork the project, create a feature branch, and send us a pull request.

To ensure a consistent code base, you should make sure the code follows the PSR-2 Coding Standards. You can also run php-cs-fixer with the configuration file that can be found in the project root directory.

If you would like to help, take a look at the list of open issues.