Begin Wyrm from the game kit

scripts/dev-all.mjs

@@ -0,0 +1,39 @@
+// The game server and the site together, for playing locally: one terminal,
+// each line marked with its side, and Ctrl-C (or either one stopping or
+// failing to get its port) stops both.
+import { spawn } from 'node:child_process';
+
+const sides = [
+	['server', ['run', 'server']],
+	['site', ['run', 'dev', '--', ...process.argv.slice(2)]]
+];
+const children = sides.map(([name, args]) => {
+	const child = spawn('npm', args, { stdio: ['inherit', 'pipe', 'pipe'] });
+	for (const stream of [child.stdout, child.stderr]) {
+		let rest = '';
+		stream.on('data', (chunk) => {
+			const lines = (rest + chunk).split('\n');
+			rest = lines.pop();
+			for (const line of lines) {
+				console.log(`[${name}] ${line}`);
+				// A watcher outlives the crash it watches, so a port already taken would leave one side running alone.
+				if (line.includes('EADDRINUSE')) {
+					console.log(`[${name}] its port is taken: is another copy already running?`);
+					stop(1);
+				}
+			}
+		});
+	}
+	child.on('exit', (code) => stop(code ?? 0));
+	return child;
+});
+
+let stopping = false;
+function stop(code) {
+	if (stopping) return;
+	stopping = true;
+	for (const c of children) if (c.exitCode === null) c.kill('SIGTERM');
+	process.exitCode = code;
+}
+process.on('SIGINT', () => stop(0));
+process.on('SIGTERM', () => stop(0));