feat: 搭建前后端可执行程序示例

src/server/config.ts

@@ -0,0 +1,39 @@
+export interface RuntimeConfig {
+  host: string;
+  port: number;
+}
+
+const DEFAULT_HOST = "127.0.0.1";
+const DEFAULT_PORT = 3000;
+
+export function readRuntimeConfig(
+  argv: string[] = process.argv.slice(2),
+  env: Record<string, string | undefined> = Bun.env,
+): RuntimeConfig {
+  const host = readOption(argv, "host") ?? env.HOST ?? DEFAULT_HOST;
+  const portValue = readOption(argv, "port") ?? env.PORT ?? String(DEFAULT_PORT);
+  const port = Number(portValue);
+
+  if (!Number.isInteger(port) || port < 0 || port > 65535) {
+    throw new Error(`无效端口: ${portValue}`);
+  }
+
+  return { host, port };
+}
+
+function readOption(argv: string[], name: string): string | undefined {
+  const prefix = `--${name}=`;
+  const inline = argv.find((value) => value.startsWith(prefix));
+
+  if (inline) {
+    return inline.slice(prefix.length);
+  }
+
+  const index = argv.indexOf(`--${name}`);
+
+  if (index >= 0) {
+    return argv[index + 1];
+  }
+
+  return undefined;
+}