Command to dump schema

Command/DumpSchemaCommand.php

@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace TheCodingMachine\Graphqlite\Bundle\Command;
+
+use GraphQL\Type\Definition\ObjectType;
+use GraphQL\Utils\SchemaPrinter;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use TheCodingMachine\GraphQLite\Schema;
+
+/**
+ * Shamelessly stolen from Api Platform
+ */
+class DumpSchemaCommand extends Command
+{
+    protected static $defaultName = 'graphqlite:dump-schema';
+
+    /**
+     * @var Schema
+     */
+    private $schema;
+
+    public function __construct(Schema $schema)
+    {
+        $this->schema = $schema;
+
+        parent::__construct();
+    }
+
+    protected function configure(): void
+    {
+        $this
+            ->setDescription('Export the GraphQL schema in Schema Definition Language (SDL)')
+            ->addOption('output', 'o', InputOption::VALUE_REQUIRED, 'Write output to file');
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $io = new SymfonyStyle($input, $output);
+
+        // Trying to guarantee deterministic order
+        $this->sortSchema();
+
+        $schemaExport = SchemaPrinter::doPrint($this->schema);
+
+        $filename = $input->getOption('output');
+        if (\is_string($filename)) {
+            file_put_contents($filename, $schemaExport);
+            $io->success(sprintf('Data written to %s.', $filename));
+        } else {
+            $output->writeln($schemaExport);
+        }
+
+        return 0;
+    }
+
+    private function sortSchema(): void
+    {
+        $config = $this->schema->getConfig();
+
+        $refl = new \ReflectionProperty(ObjectType::class, 'fields');
+        $refl->setAccessible(true);
+
+        $fields = $config->query->getFields();
+        ksort($fields);
+        $refl->setValue($config->query, $fields);
+
+        $fields = $config->mutation->getFields();
+        ksort($fields);
+        $refl->setValue($config->mutation, $fields);
+    }
+}

Resources/config/container/graphqlite.xml

@@ -129,5 +129,7 @@
             </argument>
             <tag name="kernel.cache_clearer"/>
         </service>
+
+        <service id="TheCodingMachine\Graphqlite\Bundle\Command\DumpSchemaCommand" />
     </services>
 </container>

Tests/TheCodingMachine/Graphqlite/Bundle/Tests/Command/DumpSchemaCommandTest.php

@@ -0,0 +1,28 @@
+<?php
+
+
+namespace TheCodingMachine\Graphqlite\Bundle\Tests\Command;
+
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Console\Tester\CommandTester;
+use TheCodingMachine\Graphqlite\Bundle\Tests\GraphqliteTestingKernel;
+use Symfony\Bundle\FrameworkBundle\Console\Application;
+
+class DumpSchemaCommandTest extends TestCase
+{
+    public function testExecute()
+    {
+        $kernel = new GraphqliteTestingKernel();
+        $application = new Application($kernel);
+
+        $command = $application->find('graphqlite:dump-schema');
+        $commandTester = new CommandTester($command);
+        $commandTester->execute([]);
+
+        $this->assertRegExp(
+            '/type Product {[\s"]*seller: Contact\s*name: String!\s*price: Float!\s*}/',
+            $commandTester->getDisplay()
+        );
+    }
+}

composer.json

@@ -29,7 +29,8 @@
     "nyholm/psr7": "^1.1",
     "laminas/laminas-diactoros": "^2.2.2",
     "overblog/graphiql-bundle": "^0.1.2 | ^0.2",
-    "thecodingmachine/cache-utils": "^1"
+    "thecodingmachine/cache-utils": "^1",
+    "symfony/console": "^4.1.9 | ^5"
   },
   "require-dev": {
     "symfony/security-bundle": "^4.2 || ^5",