Display the current Git 'version' in PHP

Question

I want to display the Git version on my site.

How can I display a semantic version number from Git, that non-technical users of a site can easily reference when raising

Answer 1

Firstly, some git commands to fetch version information:

• commit hash long
  • git log --pretty="%H" -n1 HEAD
• commit hash short
  • git log --pretty="%h" -n1 HEAD
• commit date
  • git log --pretty="%ci" -n1 HEAD
• tag
  • git describe --tags --abbrev=0
• tag long with hash
  • git describe --tags

Secondly, use exec() combined with the git commands of your choice from above to build the version identifier:

class ApplicationVersion
{
    const MAJOR = 1;
    const MINOR = 2;
    const PATCH = 3;

    public static function get()
    {
        $commitHash = trim(exec('git log --pretty="%h" -n1 HEAD'));

        $commitDate = new \DateTime(trim(exec('git log -n1 --pretty=%ci HEAD')));
        $commitDate->setTimezone(new \DateTimeZone('UTC'));

        return sprintf('v%s.%s.%s-dev.%s (%s)', self::MAJOR, self::MINOR, self::PATCH, $commitHash, $commitDate->format('Y-m-d H:i:s'));
    }
}

// Usage: echo 'MyApplication ' . ApplicationVersion::get();

// MyApplication v1.2.3-dev.b576fd7 (2016-11-02 14:11:22)