wikimedia/mediawiki-core

<?php

namespace Wikimedia\Composer;

/**
 * Reads a composer.json file and provides accessors to get
 * its hash and the required dependencies
 *
 * @since 1.25
 */
class ComposerJson {
    /**
     * @var array[]
     */
    private $contents;

    /**
     * @param string $location
     */
    public function __construct( $location ) {
        $this->contents = json_decode( file_get_contents( $location ), true );
    }

    /**
     * Dependencies as specified by composer.json
     *
     * @return string[]
     */
    public function getRequiredDependencies() {
        $deps = [];
        if ( isset( $this->contents['require'] ) ) {
            foreach ( $this->contents['require'] as $package => $version ) {
                // Examples of package dependencies that don't have a / in the name:
                // php, ext-xml, composer-plugin-api
                if ( strpos( $package, '/' ) !== false ) {
                    $deps[$package] = self::normalizeVersion( $version );
                }
            }
        }

        return $deps;
    }

    /**
     * Strip a leading "v" from the version name
     *
     * @param string $version
     * @return string
     */
    public static function normalizeVersion( $version ) {
        // Composer auto-strips the "v" in front of the tag name
        return ltrim( $version, 'v' );
    }

}