How to programmatically get an extension's version from its composer.json file?

dmitry_fedyuk · June 26, 2016, 8:55am

mage2pro/core/blob/6d6fa76/Core/lib/composer.php?ts=4#L47-L66


/**
* 2016-06-26
* The method can be used not only for the custom packages,
* but for the standard Magento packages too.
* «How to programmatically get an extension's version from its composer.json file?»
* https://mage2.pro/t/1798
* @param string $name [optional]
* @return string|null
*/
function df_package_version($name) {
	/** @var P|IP|null $package */
	$package = df_package($name);
	/**
	 * 2016-07-01
	 * By analogy with
	 * @see \Magento\Framework\Composer\ComposerInformation::getInstalledMagentoPackages()
	 * https://mage2.pro/t/1796
	 */
	return !$package ? null : $package->getPrettyVersion();
}

Details: How is \Magento\Framework\Composer\ComposerInformation::getInstalledMagentoPackages() implemented and used?