sebastian/version is a library that helps with managing the version number of Git-hosted PHP projects.

You can add this library as a local, per-project dependency to your project using Composer:

composer require sebastian/version

If you only need this library during development, for instance to run your project's test suite, then you should add it as a development-time dependency:

composer require --dev sebastian/version

The constructor of the SebastianBergmann\Version class expects two parameters:

• $release is the version number of the latest release (X.Y.Z, for instance) or the name of the release series (X.Y) when no release has been made from that branch / for that release series yet.
• $path is the path to the directory (or a subdirectory thereof) where the sourcecode of the project can be found. Simply passing __DIR__ here usually suffices.

Apart from the constructor, the SebastianBergmann\Version class has a single public method: asString().

Here is a contrived example that shows the basic usage:

<?php declare(strict_types=1);
use SebastianBergmann\Version;
$version = new Version('1.0.0', __DIR__);
var_dump($version->asString());

string(18) "1.0.0-17-g00f3408"

When a new release is prepared, the string that is passed to the constructor as the first argument needs to be updated.

• If $path is not (part of) a Git repository and $release is in X.Y.Z format then $release is returned as-is.
• If $path is not (part of) a Git repository and $release is in X.Y format then $release is returned suffixed with -dev.
• If $path is (part of) a Git repository and $release is in X.Y.Z format then the output of git describe --tags is returned as-is.
• If $path is (part of) a Git repository and $release is in X.Y format then a string is returned that begins with X.Y and ends with information from git describe --tags.