phpcs-diff detects violations of a defined set of coding standards based on a git diff.

The latest version of phpcs-diff requires PHP version 7.3.0 or later.

This project also depends on squizlabs/php_codesniffer which is used internally to fetch the failed violations via phpcs.

Finally, the league/climate package is also installed. This is to deal with console output, but this dependency may be removed in a future release.

If you use Composer, you can install phpcs-diff system-wide with the following command:

composer global require tiagohillebrandt/phpcs-diff

It's also possible to install phpcs-diff as a development dependency in your project:

composer require --dev tiagohillebrandt/phpcs-diff

Or alternatively, you can manually include a dependency for tiagohillebrandt/phpcs-diff in your composer.json file. For example:

{
    "require-dev": {
        "tiagohillebrandt/phpcs-diff": "^3.0"
    }
}

You will then be able to run phpcs-diff from the vendor bin directory:

./vendor/bin/phpcs-diff

You can also download the phpcs-diff source and create a symlink to your /usr/bin directory:

git clone https://github.com/tiagohillebrandt/phpcs-diff.git
cd phpcs-diff
php bin/phpcs-diff main -v

You could also add a symlink to your /usr/bin directory:

ln -s phpcs-diff/bin/phpcs-diff /usr/bin/phpcs-diff

phpcs-diff <current-branch> <base-branch> -v

In this example, the current branch is compared to the main branch. phpcs-diff would execute the following diff statement behind the scenes:

git diff current-branch main

Please note:

• The -v flag is optional and provides verbose output during processing.
• The current-branch parameter is optional. If not specified, phpcs-diff will use the current commit hash obtained via git rev-parse --verify HEAD.
• By default, phpcs-diff looks for the ruleset.xml file in the root directory of the project. To use a different ruleset file or standard, specify it using the --standard option.

After running phpcs-diff, the executable will return an output similar to the following:

########## START OF PHPCS CHECK ##########
module/Poject/src/Console/Script.php
 - Line 28 (WARNING) Line exceeds 120 characters; contains 190 characters
 - Line 317 (ERROR) Blank line found at end of control structure
########### END OF PHPCS CHECK ###########

phpcs-diff allows you to specify custom coding standards and ruleset files to suit your needs. For example, to use a predefined standard like PSR-12, you can run:

phpcs-diff --standard=PSR12 main

You can find a list of available standards in PHP_CodeSniffer's GitHub repository.

To apply a custom ruleset file, simply use:

phpcs-diff --standard=phpcs.xml.dist main

These options let you customize the code analysis to align with your specific coding standards and project requirements.

phpcs-diff detects violations of a defined set of coding standards based on a git diff. It uses phpcs from the PHP_CodeSniffer project.

This project offers the following benefits:

• Accelerates your CI/CD pipeline by validating only the modified files instead of the entire codebase.
• Facilitates the migration of legacy codebases, enabling incremental compliance with coding standards without the risk of extensive changes at once.

This executable works by checking the changed lines, compared to the base branch, against all failed violations for those files. This ensures that any new or changed code will be compliant.

Over time, this approach will help your codebase become more compliant with the coding standard, and you may eventually reach a point where you can run phpcs on the entire codebase.

This project is derived from the olivertappin/phpcs-diff library. It was created to ensure more frequent updates, as the original repository appears to be abandoned.