composer/src/Composer/Command/ValidateCommand.php

<?php

/*
 * This file is part of Composer.
 *
 * (c) Nils Adermann <naderman@naderman.de>
 *     Jordi Boggiano <j.boggiano@seld.be>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Composer\Command;

use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Input\InputArgument;
use Symfony\Component\Console\Output\OutputInterface;
use Composer\Json\JsonFile;
use Composer\Json\JsonValidationException;
use Composer\Util\RemoteFilesystem;
use Composer\Util\SpdxLicenseIdentifier;

/**
 * ValidateCommand
 *
 * @author Robert Schönthal <seroscho@googlemail.com>
 * @author Jordi Boggiano <j.boggiano@seld.be>
 */
class ValidateCommand extends Command
{
    /**
     * configure
     */
    protected function configure()
    {
        $this
            ->setName('validate')
            ->setDescription('Validates a composer.json')
            ->setDefinition(array(
                new InputArgument('file', InputArgument::OPTIONAL, 'path to composer.json file', './composer.json')
            ))
            ->setHelp(<<<EOT
The validate command validates a given composer.json

EOT
            );
    }

    /**
     * @param InputInterface $input
     * @param OutputInterface $output
     *
     * @return int
     */
    protected function execute(InputInterface $input, OutputInterface $output)
    {
        $file = $input->getArgument('file');

        if (!file_exists($file)) {
            $output->writeln('<error>' . $file . ' not found.</error>');

            return 1;
        }
        if (!is_readable($file)) {
            $output->writeln('<error>' . $file . ' is not readable.</error>');

            return 1;
        }

        $laxValid = false;
        try {
            $json = new JsonFile($file, new RemoteFilesystem($this->getIO()));
            $manifest = $json->read();

            $json->validateSchema(JsonFile::LAX_SCHEMA);
            $laxValid = true;
            $json->validateSchema();
        } catch (JsonValidationException $e) {
            if ($laxValid) {
                $output->writeln('<info>' . $file . ' is valid for simple usage with composer but has</info>');
                $output->writeln('<info>strict errors that make it unable to be published as a package:</info>');
            } else {
                $output->writeln('<error>' . $file . ' is invalid, the following errors were found:</error>');
            }
            foreach ($e->getErrors() as $message) {
                $output->writeln('<error>' . $message . '</error>');
            }

            return 1;
        } catch (\Exception $e) {
            $output->writeln('<error>' . $file . ' contains a JSON Syntax Error:</error>');
            $output->writeln('<error>' . $e->getMessage() . '</error>');

            return 1;
        }

        if (isset($manifest['license'])) {
            $licenseValidator = new SpdxLicenseIdentifier();
            if (!$licenseValidator->validate($manifest['license'])) {
                $output->writeln(sprintf(
                    '<warning>License "%s" is not a valid SPDX license identifier</warning>'."\n".
                    '<warning>see http://www.spdx.org/licenses/ and http://getcomposer.org/doc/04-schema.md#license</warning>',
                    print_r($manifest['license'], true)
                ));
            }
        } else {
            $output->writeln('<warning>No license specified.</warning>');
        }

        $output->writeln('<info>' . $file . ' is valid</info>');

        return 0;
    }
}