README

A tool that can be used to verify BC breaks between two versions of a PHP library.

This fork changes internal classes and methods interpretation according to PHPStan backward compatibility promise.

Pre-requisites/assumptions

• Your project uses git
• Your project uses composer.json to define its dependencies
• All source paths are covered by an "autoload" section in composer.json
• Changes need to be committed to git to be covered. You can implement your own logic to extract sources and dependencies from a project though.

Installation

composer require --dev ondrejmirtes/backward-compatibility-check

Usage

Adding to a continuous integration pipeline

The typical intended usage is to just add roave-backward-compatibility-check to your CI build:

vendor/bin/roave-backward-compatibility-check

This will automatically detect the last minor version tagged, and compare the API against the current HEAD. If any BC breaks are found, the tool returns a non-zero status, which on most CI systems will cause the build to fail.

NOTE: detecting the base version only works if you have git tags in the SemVer-compliant x.y.z format, such as 1.2.3.

NOTE: since this tool relies on tags, you need to make sure tags are fetched as part of your CI pipeline. For example in a GitHub action, note the use of fetch-depth: 0:

jobs:
  roave-backwards-compatibility-check:
    name: Roave Backwards Compatibility Check
      runs-on: ubuntu-latest
      steps:
        - uses: actions/checkout@v2
          with:
            fetch-depth: 0
        - name: "Install PHP"
          uses: shivammathur/setup-php@v2
          with:
            php-version: "8.0"
        - name: "Install dependencies"
          run: "composer install"
        - name: "Check for BC breaks"
          run: "vendor/bin/roave-backward-compatibility-check"

Running manually

To generate additional documentation for changelogs:

vendor/bin/roave-backward-compatibility-check --format=markdown > results.md

GitHub Actions

When running in GitHub Actions, it is endorsed to use the --format=github-actions output format:

vendor/bin/roave-backward-compatibility-check --format=github-actions

Documentation

If you need further guidance:

vendor/bin/roave-backward-compatibility-check --help

Configuration

There are currently no configuration options available.