get-app-port.ts
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get-app-port.ts
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	import { loadAppConfigModule } from "./load-app-config.js";

	function parsePort(value: unknown): number \| null {
	if (typeof value === "number" && Number.isFinite(value)) {
	return value;
	}
	if (typeof value === "string" && value.trim() !== "") {
	const parsed = Number.parseInt(value, 10);
	if (Number.isFinite(parsed)) {
	return parsed;
	}
	}
	return null;
	}

	export async function getAppPort(projectDir: string): Promise<number \| null> {
	const configModule = await loadAppConfigModule(projectDir);
	const configPort = configModule ? parsePort(configModule.PORT) : null;
	if (configPort !== null) {
	return configPort;
	}
	return parsePort(process.env.SEALIOUS_PORT ?? null);
	}