Build hot reload artifacts before worker restart

FileBuildCommand.php

@@ -0,0 +1,72 @@
+<?php
+declare(strict_types=1);
+
+namespace Kiri\Server;
+
+use Kiri\Di\HotReloadState;
+use Kiri\Router\RouteArtifactState;
+use Kiri\Router\Router;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Throwable;
+
+class FileBuildCommand extends Command
+{
+	protected function configure(): void
+	{
+		$this->setName('sw:file-build')
+		     ->setDescription('build hot reload artifacts for changed files');
+	}
+
+	protected function execute(InputInterface $input, OutputInterface $output): int
+	{
+		defined('ROUTER_TYPE_HTTP') or define('ROUTER_TYPE_HTTP', 'http');
+		putenv('KIRI_FILE_BUILD=1');
+
+		$changedFiles = di(HotReloadState::class)->peek();
+		$startedAt = microtime(true);
+
+		try {
+			$syntaxError = $this->lintChangedFiles($changedFiles);
+			if ($syntaxError !== null) {
+				$output->writeln('<error>file build failed: ' . $syntaxError . '</error>');
+				return Command::FAILURE;
+			}
+
+			di(Router::class)->scan_build_route();
+			di(HotReloadState::class)->store($changedFiles);
+			di(RouteArtifactState::class)->markBuild(ROUTER_TYPE_HTTP, $changedFiles);
+
+			$elapsed = round((microtime(true) - $startedAt) * 1000, 2);
+			$output->writeln(sprintf('file build complete: %d changed files, %sms', count($changedFiles), $elapsed));
+			return Command::SUCCESS;
+		} catch (Throwable $throwable) {
+			if (class_exists('Kiri')) {
+				\Kiri::getLogger()->json_log($throwable);
+			}
+			$output->writeln('<error>file build failed: ' . $throwable->getMessage() . '</error>');
+			return Command::FAILURE;
+		} finally {
+			putenv('KIRI_FILE_BUILD');
+		}
+	}
+
+	private function lintChangedFiles(array $changedFiles): ?string
+	{
+		foreach ($changedFiles as $file) {
+			if (!is_string($file) || !str_ends_with($file, '.php') || !is_file($file)) {
+				continue;
+			}
+
+			$output = [];
+			$returnCode = 0;
+			exec(escapeshellarg(PHP_BINARY ?: 'php') . ' -l ' . escapeshellarg($file) . ' 2>&1', $output, $returnCode);
+			if ($returnCode !== 0) {
+				return implode("\n", $output);
+			}
+		}
+
+		return null;
+	}
+}