function Hg::getVersion

Retrieves the current hg version.

Return value

string|null The hg version number, if present.

2 calls to Hg::getVersion()

Hg::throwException in vendor/composer/composer/src/Composer/Util/Hg.php

HgDownloader::doDownload in vendor/composer/composer/src/Composer/Downloader/HgDownloader.php

@inheritDoc

File

vendor/composer/composer/src/Composer/Util/Hg.php, line 110

Class

Hg

@author Jonas Renaudot <jonas.renaudot@gmail.com>

Namespace

Composer\Util

Code

public static function getVersion(ProcessExecutor $process) : ?string {
    if (false === self::$version) {
        self::$version = null;
        if (0 === $process->execute([
            'hg',
            '--version',
        ], $output) && Preg::isMatch('/^.+? (\\d+(?:\\.\\d+)+)(?:\\+.*?)?\\)?\\r?\\n/', $output, $matches)) {
            self::$version = $matches[1];
        }
    }
    return self::$version;
}