feat: support config and plugins

Author: mapleeit

lib/cli.ts

@@ -2,7 +2,6 @@
 
 import * as yargs from "yargs";
 import tsw from "./index";
-import * as path from "path";
 
 const { argv } = yargs
   .alias("h", "help")
@@ -11,9 +10,15 @@ const { argv } = yargs
     type: "boolean",
     description: "Run with verbose logging",
     default: false
+  })
+  .option("config", {
+    alias: "c",
+    type: "string",
+    description: "Config file path",
+    default: "tswconfig.json"
   });
 
-const { _ } = argv;
+const { _, config } = argv;
 const [main] = _;
 
-tsw(path.resolve(process.cwd(), main));
+tsw(process.cwd(), main, config);

lib/index.ts

@@ -1,13 +1,47 @@
+import * as path from "path";
 import { consoleHack } from "./core/runtime/console.hack";
 import { httpCreateServerHack } from "./core/runtime/create-server.hack";
 import { dnsHack } from "./core/runtime/dns.hack";
 import { requestHack } from "./core/runtime/capture/index";
+import { eventBus } from "./core/bus";
+
+const loadPlugins = async (
+  basePath: string,
+  config: typeof global.tswConfig
+): Promise<void> => {
+  // eslint-disable-next-line no-restricted-syntax
+  for (const pluginPath of config.plugins) {
+    if (!pluginPath.trim()) {
+      return;
+    }
+
+    let absolutePath = "";
+    if (path.isAbsolute(pluginPath)) {
+      absolutePath = pluginPath;
+    } else if (pluginPath.startsWith(".")) {
+      absolutePath = path.resolve(basePath, pluginPath);
+    } else {
+      absolutePath = pluginPath;
+    }
+
+    // eslint-disable-next-line no-await-in-loop
+    (await import(absolutePath))(eventBus, config);
+  }
+};
+
+export default async (
+  basePath: string,
+  mainPath: string,
+  configPath: string
+): Promise<void> => {
+  global.tswConfig = await import(path.resolve(basePath, configPath));
 
-export default async (absolutePath2Main: string): Promise<void> => {
   httpCreateServerHack();
   dnsHack();
   consoleHack();
   requestHack();
 
-  await import(absolutePath2Main);
+  await loadPlugins(basePath, global.tswConfig);
+
+  await import(path.resolve(basePath, mainPath));
 };

typings/type.d.ts

@@ -23,4 +23,12 @@ declare namespace NodeJS {
   interface Domain {
     currentContext?: any;
   }
+
+  interface Global {
+    tswConfig: {
+      appid: string;
+      appkey: string;
+      plugins: string[];
+    };
+  }
 }