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

• 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.

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

You can also use Docker to run roave-backward-compatibility-check:

docker run --rm -v `pwd`:/app nyholm/roave-bc-check

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.

You can use it as a Github Action like this:

.github/workflows/main.yml

on: [push]
name: Test
jobs:
    roave_bc_check:
        name: Roave BC Check
        runs-on: ubuntu-latest
        steps:
            - uses: actions/checkout@master
            - name: fetch tags
              run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
            - name: Roave BC Check
              uses: docker://nyholm/roave-bc-check-ga

To generate additional documentation for changelogs:

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

If you need further guidance:

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

There are currently no configuration options available.